denver international airport division 02 – technical...

TECHNICAL SPECIFICATIONS DIVISION 02

DENVER INTERNATIONAL AIRPORT PIKES PEAK PARKING RESTORATION

CONTRACT NO. 201845783

ISSUED FOR BID

MULLER ENGINEERING COMPANY 1

NOVEMBER 2018

DENVER INTERNATIONAL AIRPORT DIVISION 02 – TECHNICAL SPECIFICATIONS Division 02 – Technical Specifications shall be the Colorado Department of Transportation (CDOT) 2017 Standard Specifications for Road and Bridge Construction. These specifications control construction of this project. The following special provisions supplement or modify the Standard Specifications and take precedence over the Standard Specifications and plans. DIVISION 02 – GENERAL PROVISIONS Pages 2-3 DIVISION 02 – PROJECT SPECIAL PROVISIONS

Date Pages Index Pages (November 6, 2018) 1-2 General Provisions (November 6, 2018) 3-4 Revision of Sections 106 & 601 – Optimized PCCP Mix (November 6, 2018) 5 Revision of Section 202 – Removal of Structures and Obstructions (November 6, 2018) 6-7 Revision of Section 202 – Removal of Asphalt Mat and Concrete Pavement (November 6, 2018) 8 Revision of Section 202 – Removal of Telephone Riser (November 6, 2018) 9 Revision of Section 202 – Removal of Bus Shelter (November 6, 2018) 10 Revision of Section 210 – Reset Light Standard (November 6, 2018) 11-12 Revision of Section 210 – Reset Telephone Riser (November 6, 2018) 13 Revision of Section 401 – Reclaimed Asphalt Pavement (November 6, 2018) 16-17 Revision of Section 403 – Hot Mix Asphalt (November 6, 2018) 18-20 Revision of Section 412 – Drop Inlet Expansion Joint System (November 6, 2018) 21 Revision of Section 412 – Portland Cement Concrete Pavement Overlay (November 6, 2018) 22 Revision of Section 412 – Pressure Relief Joint Compression Seal (November 6, 2018) 23-24 Revision of Section 420 – Separator Geotextile and Geogrid for Pavement (November 6, 2018) 25-27 Pavement Revision of Section 506 – Riprap (Special) (November 6, 2018) 28 Revision of Section 601 – Structural Concrete (November 6, 2018) 29 Revision of Section 601 and 703 - Recycled Coarse Aggregate Stockpile (November 6, 2018) 30 Management and ASR Mitigation Revision of Section 613 – Telephone Riser (November 6, 2018) 31 Revision of Section 613 – Lighting (November 6, 2018) 32-39 Revision of Section 614 – Sign Post (Bollard) (November 6, 2018) 40 Revision of Section 622 – Shelter (November 6, 2018) 41-42 Revision of Section 630 – Portable Message Sign Panel (November 6, 2018) 43-44 Revision of Section 631 – Towing Services (November 6, 2018) 45-47 Revision of Section 715 – Lighting and Electrical Materials (November 6, 2018) 48-51 Traffic Control Plan – General (November 6, 2018) 52-53




ISSUED FOR BID


NOVEMBER 2018

DIVISION 02 – CDOT STANDARD SPECIAL PROVISIONS No. Date of Pages Revision of Section 105 – Conformity to the Contract of Portland Cement Concrete (July 3, 2017) 1 Pavement Revision of Sections 105 and 106 – Conformity to the Contract of Hot Mix Asphalt (December 28, 2017 10 (Voids Acceptance) Revision of Section 208 – Erosion Control (July 3, 2018) 1 Revision of Section 208 – Erosion Control (August 9, 2018) 4 Revision of Section 250 – Environmental, Health and Safety Management (July 3, 2017) 3 Revision of Section 401 – Composition of Mixtures – Voids Acceptance (July 3, 2017) 1 Revision of Section 401 – Plant Mix Pavements (July 3, 2017) 1 Revision of Section 401 – Reclaimed Asphalt Pavement (July 3, 2017) 2 Revision of Section 401 – Tolerances for Hot Mix Asphalt (Voids Acceptance) July 3, 2017) 1 Revision of Sections 412 and 705 – Preformed Compression Seals (July 3, 2017) 2 Revision of Sections 503 and 601 – Drilled Shaft (May 4, 2018) 15 Revision of Section 625 – Construction Surveying (July 3, 2017) 1 Revision of Section 703 – Classification for Aggregate Base Course (October 12, 2017) 1




ISSUED FOR BID


NOVEMBER 2018

GENERAL PROVISIONS

PART 1: GENERAL DESCRIPTION

A. Work described elsewhere in the technical specifications, contract drawings, or Part I of the contract documents shall be done in accordance with the Colorado Department of Transportation (CDOT) 2017 Standard Specifications for Road and Bridge Construction (except as noted below), and the latest edition of the Colorado Standard Plans (M&S Standards).

B. The Colorado Department of Transportation General Provisions consisting of Sections 100 through 109 of the above referenced “Standard Specifications” are NOT applicable to this Contract and are hereby deleted, except where specifically added in. In place of the deleted, the City and County of Denver’s General Provisions, General Conditions, Special Conditions, and Technical Specifications are attached to and made part of the contract. The following sections shall apply as noted: 1. Section 101 Definitions and Terms 2. Section 105 Control of Work with the following exceptions:

a. If there are any conflicts with City and County of Denver’s General Provisions, General Conditions, Special Conditions, or Technical Specifications and this section, those documents will take precedence.

b. Any reference to incentives shall be disregarded. NO incentives will be paid on this project. References to disincentives, corrective work or removal and rejection of work and/or materials shall apply.

c. Section 105.21 Acceptance shall not apply. d. Section 105.22 through 105.24 shall not apply.

3. Section 106 Control of Material 4. Section 107.02 Permits, Licenses, and Taxes 5. Section 109.01 Measurement of Quantities

PART 2: REFERENCES

1. All references to “CDOT or the Department” shall be changed to “City and County of Denver” unless otherwise noted.

2. All references to the CDOT Project Engineer and CDOT Regional Transportation Director shall mean DEN Project Manager and DEN Project Supervisor.

3. Any and all reference to incentives or positive pay factors within any documents pertaining to this contract shall not apply. NO incentives or increase pay factors will be paid on this project. References to disincentives, negative pay factors, corrective work or removal and rejection of work and/or materials shall apply.




ISSUED FOR BID


NOVEMBER 2018

2

PART 3: APPLICABLE PUBLICATIONS Copies of the Colorado Department of Transportation’s Standard Specifications for Road and Bridge Construction, Colorado Standard Plans (M&S Standards), and the Colorado Procedures Field Materials Manual 2014 are available to download at https://www.codot.gov/business/designsupport.

END OF SECTION

https://www.codot.gov/business/designsupport




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTIONS 106 & 601 OPTIMIZED PCCP MIX

Sections 106 and 601 of the Standard Specifications are hereby revised for this project as follows: Subsection 106.06 (a) 8 shall include the following: When the aggregates are blended prior to charging the mixing drum, the blended aggregate shall be sampled and tested. When the aggregates are batched individually, a sample from each aggregate shall be tested and the combined gradation shall be calculated.

Subsection 601.06 (c) shall include the following: Aggregates for Class P concrete using an Optimized Gradation, a combination of aggregates (stockpiled separately) may be combined prior to the stationary charging drum to meet the approved Combined Aggregate Gradation.

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 202 REMOVAL OF STRUCTURES AND OBSTRUCTIONS

Section 202 of the Standard Specifications shall be revised to include the following:

DESCRIPTION

The work in this section consists of the removal of 20 foot light standards Pay Item 202-00700, light bollards Pay Item 202-00750 and light standard foundations Pay Item 202-00705. All light standards and bollards shall be reset on new foundations with the exception of (1) 20 foot light standard and (2) light bollards shall be returned to Denver International Airport (DEN). The contractor shall removal of light standard foundations to two foot below finished grade, all removed concrete conduit and debris shall be dispose of properly by the contractor.

CONSTRUCTION REQUIREMENTS All light standards and luminaires are owned by DEN and shall be returned to a location designated by the City. This includes light standard, light bollards, lighting assemblies, and luminaires. Contractor shall dispose of the foundation concrete properly. Contractor shall fill holes left from the removal and grade to a like pre-construction condition.

Removal of light standard foundations shall include foundation removal to two foot below finished grade (or more if needed by the general re-construction of the area) and disposal by the Contractor. The concrete foundation below two feet shall be abandoned in-place unless in conflict with new construction.

Existing conduit shall be abandoned in place unless the conduit interferes with work or progress of other trades. Pull out conductors to the next light standard shown to remain and cut off conduits short of the foundations shown to be removed. If light standard 20 foot or light standard 70 foot or light bollard are to be reset, then the conduits shall be extended to the new reset location. New conductors shall be pulled in from the existing light standard shown to remain to the new reset location. Size and quantity of conductors shall match existing.

Contractor shall carefully remove, transport and store all light standard 20 foot, light standard 70 foot and light bollards shown to be reset. The Contractor shall restore or replace at no cost to the Project any materials that are damaged or otherwise made unusable while in Contractor’s possession including storage and transport.

METHOD OF MEASUREMENT

Removal of Light Standard shall be measured by the actual number of 20 foot Light Standards removed including all associated hardware and materials. Removal of Light Standard Foundation shall be measured by the actual number of Light Standard Foundations removed including all associated hardware and materials. Removal of Luminaire shall be measured by the actual number of Light bollards removed including all associated hardware and materials.




ISSUED FOR BID


NOVEMBER 2018

2

BASIS OF PAYMENT Payment will be made under: Pay Item Pay Unit Removal of Light Standard Each Removal of Light Standard Foundation Each Removal of Light Bollard Each Payment will be full compensation for all labor, materials, and equipment required to complete the work.

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 202 REMOVAL OF ASPHALT MAT AND CONCRETE PAVEMENT

Section 202 of the Standard Specifications is hereby revised for this project as follows: Subsection 202.01 shall include the following: Asphalt Mat This work includes removal and disposal of existing asphalt mat. Concrete Pavement This work includes the removal and disposal of existing concrete pavement, including steel, as shown on the plans or at the DEN South Recycling Yard. In subsection 202.02 the seventh paragraph shall include the following: The existing asphalt mat thickness and concrete pavement thicknesses are unknown. Removal shall be in a manner that minimizes contamination of the underlying material. The removed material shall become the property of the DEN and shall be stockpiled at the DEN Recycling Yard. the following ways: Subsection 202.12 shall include the following: Payment will be made under: Pay Item Pay Unit 202-00220 Removal of Asphalt Mat Square Yard 202-00210 Removal of Concrete Pavement Square Yard

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 202 REMOVAL OF TELEPHONE RISER

Section 202 of the Standard Specifications is hereby revised for this project as follows: Section 202.01 shall include the following: This work includes the removal of the existing telephone risers as shown on the plans. Subsection 202.12 shall include the following: Pay Item Pay Unit 202-00760 Removal of Telephone Riser Each All labor, equipment and materials required for the Removal of Telephone Riser pay item will not be measured and paid for separately, but shall be included in the work.

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 202 REMOVAL OF BUS SHELTER

Section 202 of the Standard Specifications is hereby revised for this project as follows: Section 202.01 shall include the following: This work includes the removal and disposal of the existing bus shelters as shown on the plans. Bus shelters shall become the property of the Contractor. Subsection 202.12 shall include the following: Pay Item Pay Unit 202-01500 Removal of Bus Shelter Each All labor, equipment, materials, and disposal required for the Removal of Bus Shelter pay item will not be measured and paid for separately, but shall be included in the work.

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 210 RESET LIGHT STANDARD

Section 210 of the Standard Specifications is hereby revised for this project as follows: Section 210 Light Standard of the Standard Specifications is hereby revised to include the following:

DESCRIPTION

The work in this section consists of resetting existing 20 foot Light Standard Pay Item 210-00750, 70 foot light standards Pay Item 210-00755, and light bollards Pay Item 202-00760. A complete Light Standard includes the pole, luminaire, arm, and breakaway transformer base or coupling. The Contractor shall be responsible for the installation of new Light Standard Foundations and anchorage to the new bus stop island concrete for the light bollards.

MATERIALS

The Contractor shall furnish and install a new concrete light standard foundation complete with conduits encased in red concrete integrated into the Foundation in accordance with DEN Standards and details included in the Plans. Contractor shall furnish and install any new electrical conductors, conduit, and equipment necessary to make the Light Standard operational at the new location.

The foundations required for 20 foot light standard shall be paid for as Light Standard Foundation.

The foundations required for 70 foot light standard shall be paid for as Light Standard Foundation Special.

The Contractor shall restore or replace at no cost to the Project any materials that are damaged or otherwise made unusable while in Contractor’s possession.

CONSTRUCTION REQUIREMENTS

The Contractor shall carefully re-install all conduits that were previously into the base of the light standard, light standard steel high mast or light bollard in the new locations shown on the plans. Extend all conduit into the new foundation base as noted and re-pull new wiring to match the existing removed wiring.

Provide all new conduits buried at a depth of 48 inches below finished grade. All new conduits under new or existing concrete parking lot areas shall not be encased in red concrete. All new conduits outside of new or existing concrete parking lot areas shall be encased in red concrete in accordance with DEN standards: a minimum encasement of 3 inches on all sides, top and bottom.

All 90 degree elbows shall be large sweep, PVC coated (inside and out) Galvanized Rigid Conduit.

When all foundations and conduits are in-place the contractor shall pull in new conductors to match the size and quantity that were removed from the original location.

The Contractor shall be responsible for the installation of the new concrete Light Standard Foundation or Light Standard Foundation Special at the locations shown in the Plans.




ISSUED FOR BID


NOVEMBER 2018

2

The Contractor shall furnish and install any new electrical conductors, conduit, and equipment necessary to reset the Light Standard at the new location. The new foundation, and conduits shall be in place prior to reset of the Light Standard. The Light Standard shall be installed in accordance with these specifications, the details and locations shown in the Plans, and Details.

METHOD OF MEASUREMENT

Reset Light Standard shall be measured by the actual number of 20 Foot Light Standards reset and accepted, including all associated hardware and materials.

Reset Light Standard Steel High Mast shall be measured by the actual number of 70 Foot Light Standard reset and accepted, including all associated hardware and materials.

Reset Light Bollard shall be measured by the actual number of Light Bollards reset and accepted, including all associated hardware and materials.

BASIS OF PAYMENT Payment will be made under: Pay Item Pay Unit Reset Light Standard Each Reset Light Standard Steel High Mast Each Reset Light Bollard Each Payment will be full compensation for all labor, materials, and equipment required to complete the work.

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 210 RESET TELEPHONE RISER

Section 210 of the Standard Specifications is hereby revised for this project as follows: Section 210.01 of the Standard Specifications is hereby revised to include the following: The work in this section consists of resetting existing communication pedestals as shown in the plans.

The Contractor is responsible for all materials being in conformance with DEN Construction Standards.

The Contractor shall restore or replace at no cost to the Project any materials that are damaged or otherwise made unusable while in Contractor’s possession. Reset Telephone Riser shall be measured by the actual number of communication pedestals reset and accepted, including all associated hardware and materials.

Payment will be made under: Pay Item Pay Unit Reset Telephone Riser Each All labor, equipment and materials required for the Reset of Telephone Riser pay item will not be measured and paid for separately, but shall be included in the work.

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 401 RECLAIMED ASPHALT PAVEMENT

Section 401 of the Standard Specifications is hereby revised for this project as follows:

Subsection 401.02(b) shall include the following:

Reclaimed Asphalt Pavement (RAP) is allowed in hot mix asphalt (HMA) up to a maximum binder replacement of 23 percent for all lifts, provided all specifications for HMA are met. Fine Aggregate Angularity requirements shall apply only to the virgin fraction of the fine aggregate. The RAP shall not contain clay balls, vegetable matter, or other deleterious substances, and must meet the uniformity requirements as outlined below.

HMA Project Verification Testing for asphalt content and gradation will be performed at the frequencies listed in the Field Materials Manual in accordance with CP-L 5120.

The Contractor shall have an approved mix design for the amount of RAP to be used. The AC content of the RAP utilized in the Contractor RAP mix design shall be the average AC content determined in accordance with 1B or 1C, below, or alternatively, a minimum of five samples of the Contractors RAP stockpile may be sampled and the average AC content of the RAP be determined using AASHTO T-164, Method A or B, or in accordance with 1C below. The Contractor shall determine the total binder replaced by the binder in the RAP pursuant to the following equation:

Total Binder Replaced = (A x B) x 100/E

Where:

A = RAP % Binder Content *

B = RAP % in Mix *

E = Total Effective Binder Content *

* in decimal format (i.e. 2% is 0.02)

The Total Binder Replaced by the binder in the RAP shall not exceed 23 percent of the effective binder content of either the mix design or the produced mix.

The use of RAP shall be controlled in accordance with subsections 105.05 and 106.05. If the Contractor elects to use RAP, the following additional conditions shall apply:

1. The Contractor shall have an approved Process Control (PC) Plan that details how the RAP will be processed and controlled. The PC plan shall address the following:

A. RAP Processing Techniques. This requires a schematic diagram and narrative that explains the processing (crushing, screening, and rejecting) and stockpile operation for this specific project.

B. Control of RAP Asphalt Binder Content (AASHTO T-164, Method A or B). RAP Asphalt Binder Content may also be determined in accordance with CP-L 5120, provided a RAP AC content correction factor is determined through correlation testing with AASHTO T-164, Method A or B. The correction factor shall be determined by performing correlation testing on the first five samples of the RAP AC content, then at a frequency of one for every five AC content tests thereafter. The correction factor shall be determined by calculating the average difference in AC content between CP-L 5120 and AASHTO T-164, Method A or B, and applying the correction to the AC content determined in accordance with CP-L 5120:




ISSUED FOR BID


NOVEMBER 2018

2

Frequency: 1/1000 tons of processed RAP material (minimum five tests)

C. Alternative Control of RAP Binder Content. The Contractor may propose a RAP asphalt content correction factor to be used in conjunction with CP-L 5120. The proposed CP-L 5120 RAP asphalt content correction factor shall be used with all RAP asphalt contents tested for the mixture design and quality control sampling and testing. The methodology of the proposed CP-L 5120 RAP asphalt content correction factor shall be outlined in detail in the approved RAP PC Plan. At a minimum, the proposed CP-L 5120 correction factor shall identify the principal source locations of the RAP aggregate, gradation of the material tested, and specific ignition oven serial number used in all the RAP asphalt content testing. The RAP source locations, material gradation, and specific equipment used shall substantiate the CP-L 5120 asphalt content correction factor used for the testing. The substantiation must be from data gathered from historical information or specific asphalt content correction data obtained from tests performed on similar virgin aggregate sources, virgin material gradations, and the specific equipment used.

D. Control of RAP Gradation (CP31 or AASHTO T-30):

Frequency: 1/1000 tons of processed RAP material (minimum three tests)

E. Process Control Charts shall be maintained for binder content and each screen listed in subsection 401.02(b), during addition of any RAP material to the stockpile. The Contractor shall maintain separate control charts for each RAP stockpile. The control charts shall be displayed and shall be made available, along with RAP AC extraction testing laboratory reports, to the Engineer upon request.

2. The processed RAP must be 100 percent passing the 31.5 mm (1¼ inch) sieve. The aggregate obtained from the processed RAP shall be 100 percent passing the 25.0 mm (1 inch) sieve. The aggregate and binder obtained from the processed RAP shall be uniform in all the measured parameters in accordance with the following:

UNIFORMITY* Parameter Standard Deviation

Binder Content 0.5 Percent Passing 19 mm (¾”) 4.0 Percent Passing 12.5 mm (½”) 4.0 Percent Passing 9.5 mm (⅜”) 4.0 Percent Passing 4.75 mm (#4) 4.0 Percent Passing 2.36 mm (#8) 4.0 Percent Passing 600 m (#30) 3.0 Percent Passing 75 m (#200) 1.5 *Uniformity is the Maximum allowable Standard Deviation of test results of processed RAP.

3. If RAP millings generated are incorporated in the same project, in accordance with CPL 5145 the

Contractor shall pave with a virgin mix design until sufficient amount of processed RAP has been stockpiled and tested to allow full production of a RAP HMA mix.

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 403 HOT MIX ASPHALT

Section 403 of the Standard Specifications is hereby revised for this project as follows: Subsection 403.02 shall include the following: The design mix for hot mix asphalt shall conform to the following:

Table 403-1

Property Test Method Value for Grading

SX (75) Patching

Air Voids, percent at: N (design) CPL 5115 3.5 – 4.5 3.5 – 4.5

Lab Compaction (Revolutions): N (design) CPL 5115 75 75

Stability, minimum CPL 5106 28 28 Aggregate Retained on the 4.75 mm (No.

4) Sieve for S, SX and SG, and on the 2.36mm (No. 8)

Sieve for ST and SF with at least 2 Mechanically Induced fractured faces, %

minimum*

CP 45 70 70

Accelerated Moisture Susceptibility Tensile Strength Ratio (Lottman),

minimum

CPL 5109 Method B

80

80

Minimum Dry Split Tensile Strength, kPa (psi)

CPL 5109 Method B 205 (30) 205 (30)

Grade of Asphalt Cement, Top Layer - - Grade of Asphalt Cement, Layers below

Top PG 58-28 PG 58-28

Voids in the Mineral Aggregate (VMA) % minimum CP 48 See Table

403-2 See Table

403-2 Voids Filled with Asphalt (VFA), % AI MS-2 65-80 65-80

Dust to Asphalt Ratio Fine Gradation

Coarse Gradation CP 50

0.6 – 1.2 0.8 – 1.6

0.6 - 1.2 0.8 – 1.6

Note: AI MS-2 = Asphalt Institute Manual Series 2 Note: Mixes with gradations having less than 40% passing the 4.75 mm (No. 4) sieve shall be approached

with caution because of constructability problems. Note: Gradations for mixes with a nominal maximum aggregate size of one-inch or larger are considered a

coarse gradation if they pass below the maximum density line at the #4 screen. Gradations for mixes with a nominal maximum aggregate size of 3/4” to 3/8” are considered a coarse gradation if they pass below the maximum density line at the #8 screen.

Gradations for mixes with a nominal maximum aggregate size of #4 or smaller are considered a coarse gradation if they pass below the maximum density line at the #16 screen.

*Fractured face requirements for SF may be waived by RME depending on project conditions.

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ISSUED FOR BID


NOVEMBER 2018

All mix designs shall be run with a gyratory compaction angle of 1.25 degrees and properties must satisfy Table 403-1. Form 43 will establish construction targets for Asphalt Cement and all mix properties at Air Voids up to 1.0 percent below the mix design optimum. CDOT will establish the production asphalt cement and volumetric targets based on the Contractor’s mix design and the relationships shown between the hot mix asphalt mixture volumetric properties and asphalt cement contents on the Form 429. CDOT may select a different AC content other than the one shown at optimum on the Contractor’s mix design in order to establish the production targets as contained on the Form 43. Historically, Air Voids adjustments typically result in asphalt cement increases from 0.1 to 0.5 percent. Contractors bidding the project should anticipate this change and factor it into their unit price bid.

Table 403-2

Minimum Voids in the Mineral Aggregate (VMA)

Nominal Maximum Size*,

mm (inches)

Design Air Voids **

3.5% 4.0% 4.5% 5.0%

37.5 (1½) 11.6 11.7 11.8

N/A

25.0 (1) 12.6 12.7 12.8

19.0 (¾) 13.6 13.7 13.8

12.5 (½) 14.6 14.7 14.8

9.5 (⅜) 15.6 15.7 15.8

4.75 (No. 4) 16.6 16.7 16.8 16.9

* The Nominal Maximum Size is defined as one sieve larger than the first sieve to retain more than 10%.

** Interpolate specified VMA values for design air voids between those listed.

*** Extrapolate specified VMA values for production air voids beyond those listed.

The Contractor shall prepare a quality control plan outlining the steps taken to minimize segregation of HMA. This plan shall be submitted to the Engineer and approved prior to beginning the paving operations. When the Engineer determines that segregation is unacceptable, the paving shall stop, and the cause of segregation shall be corrected before paving operations will be allowed to resume. CDOT approved Warm Mix Asphalt (WMA) may be allowed on this project in accordance with CP 59. Unique requirements for WMA design, production and acceptance testing as documented during CDOT WMA approval shall be submitted and approved prior to creation of the Form 43 and before any WMA production on the project. Delays to the project due to WMA submittal and review will be considered within the Contractor’s control and will be non-excusable. Hot mix asphalt for patching shall conform to the gradation requirements for Hot Mix Asphalt (Grading SX).

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ISSUED FOR BID


NOVEMBER 2018

A minimum of 1 percent hydrated lime by weight of the combined aggregate shall be added to the aggregate for all hot mix asphalts. Acceptance samples shall be taken as determined by the Region Construction and Materials personnel. Subsection 403.03 shall include the following: Delete subsection 403.05 and replace with the following: 403.05 The accepted quantities of hot mix asphalt will be paid for in accordance with subsection 401.22, at the contract unit price per ton for the bituminous mixture. Payment will be made under: Pay Item Pay Unit Hot Mix Asphalt (Grading SX)(75)(PG 58-28) Ton Hot Mix Asphalt (Patching)(Asphalt) Ton Aggregate, asphalt recycling agent, asphalt cement, additives, hydrated lime, and all other work and materials necessary to complete each hot mix asphalt item will not be paid for separately, but shall be included in the unit price bid. When the pay item includes the PG binder grade, any change to the submitted mix design optimum asphalt cement content to establish production targets on the Form 43 will not be measured and paid for separately, but shall be included in the work. No additional compensation will be considered or paid for any additional asphalt cement, plant modifications and additional personnel required to produce the HMA as a result in a change to the mix design asphalt cement content. Historically, typical asphalt cement increases reflected on the Form 43 are from 0.1 to 0.5 percent. However, the Contractor should anticipate the AC increases typical of his mixes. Contractors bidding the project should anticipate this change and factor it into their unit price bid. When the pay item does not include the PG binder grade, asphalt cement will be measured and paid for in accordance with Section 411. Asphalt cement used in Hot Mix Asphalt (Patching) will not be measured and paid for separately, but shall be included in the work. Excavation, preparation, and tack coat of areas to be patched will not be measured and paid for separately, but shall be included in the work.

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 412 DROP INLET EXPANSION JOINTS

Section 412 of the Standard Specifications is hereby revised for this project as follows: Subsection 412.13 (c) shall include the following: The expansion joint around each drop inlet shall be 1.00 inch thick and conform to the Iso-Flex Hydro Seal-P Expansion System or approved equal. The joint system shall be installed in accordance with the manufacturer’s recommendations. Subsection 412.24 shall include the following: Pay Item Pay Unit Drop Inlet Expansion Joint System Linear Foot

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 412 PORTLAND CEMENT CONCRETE PAVEMENT OVERLAY

Section 412 of the Standard Specifications is hereby revised for this project as follows: Subsection 412.10 shall include the following. (a) Surface Milling. Milling of the HMA may be allowed to prepare the surface for PCCP, as needed to meet the

grades. (b) Surface Cleaning. Cleaning of the surface shall be accomplished by sweeping the surface using a pickup

mechanical broom. The surface shall be further cleaned by the use of pressure cleaning with air or water to ensure all dust, grit, and foreign material is removed from the surface. The area shall be protected as necessary to prevent contamination until concrete placement. When areas are not adequately protected, the Contractor shall perform additional cleaning prior to placement of concrete overlay as directed.

(c) Patching and Crack Filling. Failed HMA will be identified by the Project Manager. It is estimated that approximately 400 tons of HMA will be required to complete patching. Pavement areas shall be patched using a minimum of 5 inches of HMA. Prior to placement of the concrete, existing cracks in the existing HMA wider than ¼ inch shall be filled with a fine asphalt mix or crusher fines to prevent cracking resulting from fins, Fins occur when plastic concrete enters open cracks which can cause slab cracking after the concrete sets.

(d) Surface Preparation. After the surface has been cleaned, patched and accepted, a moisture coat shall be placed on the prepared surface. The Contractor shall spray a light mist of water in a manner that does not cause excessive ponding. The concrete overlay shall be placed while the surface is still wet.

(e) Surface Temperature. Concrete pavement shall not be placed when the surface temperature of the HMA is 120 °F or greater.

(f) Base Files. The contractor may request the base files used for material quantity calculations.

The concrete pavement overlay shall be placed to the depth specified in the Contract. Milling may be performed at the Contractor’s option to correct grades and elevations of the existing HMA. No milling locations are specified in the Contract. If milling is used, the Contractor shall supply a detailed milling plan to insure a minimum HMA depth of 5 inches after milling. The milled area shall be approved by the Engineer prior to placing concrete pavement overlay. In subsection 412.23, first paragraph, delete the first sentence and replace it with the following: The quantities of Concrete Pavement to be paid for under these items will be measured by the square yard completed and accepted. Subsection 412.24 (a) shall include the following: Pay Item Pay Unit Concrete Pavement (5 Inch) Square Yard The price per square yard of Concrete Pavement shall be full compensation for furnishing and placing all materials, including but not limited to any HMA patching, milling, brooming, crack filling, cleaning, dowels, tie bars, joint materials, texturing, sawing, sealing, slurry removal, finishing, curing compound and rumble strips. This price per square yard shall include any additional concrete for paving irregularities, cross-slope or profile corrections along with any milling of the existing HMA performed by the discretion of the Contractor.

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 412 PRESSURE RELIEF JOINT COMPRESSION SEAL

DESCRIPTION

This specification governs the pre-compressed, chemically resistant joint seals for pressure relief joints. This specification also addresses other components such as lubricants, and adhesives required for installation.

CONSTRUCTION REQUIREMENTS General: This material is a flexible, low density, multicellular homogeneous neoprene foam. It must be designed to create constant compression with the concrete joint faces once it is installed. If there is a possibility that the pavement will contract, and the seal will be required to act in tension an epoxy adhesive must be used to secure the seal to the concrete joint. The joint seal is to be one and one-half (1 ½) inches wide and be inserted into a one and one-fourth (1 ¼) inch wide joint gap. The depth and length shall be determined by the manufacturer. The product must conform to AASHTO M 220 and ASTM D 2628 when pertaining to pavement joints, or AASHTO M 297 and ASTM D 3542 if the product is intended for bridge use.

Table 1 Physical Requirements for Preformed Elastomeric Joint Seals Property Requirements ASTM Method

Tensile Strength, min 2000 psi D 412

Elongation at break, min 250% D 412 Hardness Type A durometer, points 55 ± 5 D 2240 (modified)A Oven aging, 70h at 212oF D 573 Tensile Strength loss, max 20% max Elongation loss, max 20% max Hardness, Type A durometer, points change 0 to + 10

Oil Swell ASTM Oil 3 70h at 212oF D 471 Weight change max 45% max Ozone resistance D 1149 (modified)B 20% strain 300 pphm in air 70h at 104oF no cracks Low-temperature stiffening 7 days at 14oF D 2240 Hardness, Type A durometer, points change 0 to + 15

Low-temperature recovery,C 72h at 14oF, 50% deflection, min 88% D 2628 Low-temperature recovery,C 22h at -20oF, 50% deflection, min 83% D 2628 High-temperature recovery,C 70h at 212oF, 50% deflection, min 85% D 2628

Compression-deflection at 80% of nominal width, min 3.5 lbf/in D 2628

A The term "modified" in the table relates to the specimen preparation. The use of joint seal as the specimen source requires that more plies than specified in either of the modified test procedures be used. Such specimen modification shall be agreed upon by the purchaser and seller prior to testing. The hardness test shall be made with the durometer in a durometer stand as recommended in Method D 2240 B Test in accordance with Procedure A of D 518 C Cracking, splitting, or sticking of a specimen during a recovery test shall mean that the specimen has failed the test




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Material Specifications: All epoxies, adhesives, lubricants, cementing agents, etc., that are required for installation of the seals are to be specified and provided by the manufacturer. All installation is to be in strict accordance with the specified procedures and practices of the seal manufacturer. Properly package all of these components and provide instructions for safe handling, storage, transport, proper disposal of component and container, emergency procedures, etc. Durably label all containers with name and address of the manufacturer, date of manufacture, shelf life or expiration date if applicable, a unique identifier such as a batch or lot number, and any other relevant information. Construction: Openings for the joint material shall be formed or sawed. Prior to installation of the joint material the faces of the joint shall be sandblasted followed by an air blast to clean all dust and debris from the joint face. Sandblasting and air blasting shall be limited to the amount that may be sealed in the same workday. A foam spacer block may be used beneath the seal to provide additional stability, but the foam must be easily compressible, so not to interfere with the joint or the joint seal’s compression. Application and installation equipment shall be provided by the manufacturer and shall be inspected to ensure that installation meets the design and manufacturer’s requirements. Subsection 412.24 shall include the following: Pay Item Pay Unit Pressure Relief Joint Compression Seal Linear Foot

END OF SECTION




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NOVEMBER 2018

REVISION OF SECTION 420 SEPARATOR GEOTEXTILE AND GEOGRID FOR PAVEMENT REINFORCEMENT

Section 420 of the Standard Specifications is hereby revised for this project to include the following:

DESCRIPTION This work consists of furnishing and installing separator geotextile and geogrid pavement reinforcement material below the pavement base, in accordance with these specifications and in conformity with the lines and grades shown on the plans or established.

MATERIALS Separation geotextiles shall meet the strength requirements for Class 1 Geotextile as presented in AASHTO M288, Table 1. The separation geotextile shall also meet the requirements presented in AASHTO M287, Table 2 for soils with 15 to 50 percent passing the 0.075mm sieve.

The separation geotextile shall be selected from the New York Department of Transportation’s approved Products List of Geosynthetic materials and meet the National Transportation Product Evaluation Program (NTPEP) and AASHTO M288 testing requirements as noted in Section 712.08 of the 2017 CDOT Standard Specifications for Road and Bridge Construction.

Geogrids shall meet the properties shown in Table 1.

Geogrid Table 1. Property Requirements of Geogrid Material

Property Test Value

Aperture size (inch) nominal dimension ASTM D 374 1.0 (MD) x 1.3 (XMD)

Rib thickness (inch) ASTM D 374 0.05

Junction thickness (inch) ASTM D 374 0.120 Junction efficiency, % of rib ultimate tensile strength 1 (min.) ASTM D 7737 93%

Tensile strength, 2% strain (lb./ft) ASTM D 6637 Method B 410 (MD) x 620 (XMD) Ultimate Strength (lb./ft) ASTM D 6637 Method B 1,310 (MD) x 1,970 (XMD) Ultraviolet resistance (%) minimum retained tensile strength after 500 hours ASTM D 4355 70

Flexural stiffness (mg-cm) ASTM D 7748 750,000 Aperture Stability (kg-cm/deg) ASTM D 7864 6.6 Notes:

1. Junction efficiency is the ratio of (ASTM D 7737 Junction Strength) / (ASTM D 6637 Method “A” Single Rib) x 100%

• Minimum Average Roll Values (MARVs) in accordance with ASTM 4759, unless indicated otherwise. • Machine Direction (MD) X Cross Machine Direction (XMD).

The geogrid reinforcement shall contain stabilizers or inhibitors to prevent degradation of properties due to ultraviolet light exposure. The geogrid reinforcement shall be inert to all naturally occurring alkaline and acidic soil conditions.

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SUBMITTALS

The manufacturers shall furnish certified test reports from an independent laboratory indicating that the geotextile and geogrid material meets the requirements of the specifications.

CONSTRUCTION REQUIREMENTS

Separation Geotextile and Geogrid pavement reinforcement shall be installed in accordance with the following:

(a) Delivery, Storage, and Handling. Upon delivery, the Contractor shall check the geotextile and geogrid to assure the proper material has been received. Special care shall be taken in the handling of geotextiles and geogrids manufactured from polypropylene at temperatures at or below –18 °C (0 °F).

(b) Installation. Geotextile and geogrid shall be laid at steps and alignment as shown on the Plans or as

directed by the Engineer. Geogrid shall be oriented such that the strong direction (XMD) is perpendicular to the roadway alignment. Geotextile and geogrid material shall be secured to the ground surface in accordance with the manufacturer’s directions.

(c) Geotextile and geogrid shall be placed so that at the back of the excavation, a “tail” of geogrid is left extending beyond the base material, to accommodate attachment or overlap between adjacent geotextiles or geogrids placed in separate construction sequences. Adjacent sheets shall be connected or overlapped in accordance with the manufacturer’s directions as one continuous width (longitudinally along the roadway). The Contractor shall submit a connection method and detail a minimum of ten (10) working days prior to the start of geotextile and geogrid placement for approval by the Engineer.

(d) Fill Placement over Geotextile and geogrid. Tracked construction equipment shall not operate directly

upon the geogrid. The minimum ABC Special thickness of 6 inches is required prior to operation of tracked vehicles over the geotextile and geogrid. Rubber-tire equipment may pass over at slow speeds, less than 10 mph, if the underlying material is capable of supporting the loads without excessive rutting or causing damage to the grid. Operators shall avoid sudden braking or sharp turning.

(e) ABC Special shall be back-dumped from trucks riding on top of the reinforced fill and bladed onto the

geotextile – geogrid system in such a manner that the fill rolls onto the grid ahead, e.g., by gradually raising dozer blade while moving forward. Material placed over the geotextile / geogrid system shall be compacted in accordance with the compaction requirements for this project or as directed. Care shall be taken to assure the geogrid reinforcement is not damaged.

(f) Fill material shall be compacted in accordance with Section 304.




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METHOD OF MEASUREMENT Geotextile and grid pavement reinforcement will be measured in place by the square yard of surface area, completed and accepted.

BASIS OF PAYMENT The accepted quantities will be paid for at the contract unit price per square yard. Payment will be made under: Pay Item Pay Unit 420 Separator Geotextile Square Yard 420 Geogrid Pavement Reinforcement Square Yard Payment will be full compensation for all labor, materials, equipment, and other items necessary and incidental to the completion of the work. Additional geogrid for overlaps will not be measured and paid for separately, but shall be included in the work. Aggregate Base Course (Special) will be paid for as provided by Section 304.

END OF SECTION




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NOVEMBER 2018

REVISION OF SECTION 506 RIPRAP (SPECIAL)

Section 506 of the Standard Specifications is revised for this project as follows: Subsection 506.02 shall be modified to include the following:

Where Riprap (Special) is designated on the Contract Drawings, CDOT Section 703, AASHTO #3 Coarse Aggregate or 4” minus rock shall be used. All aggregate specifications shown in section 703.02 shall apply. Riprap (Special) material shall be obtained from the DEN Recycle Yard. Contractor will coordinate with the DEN Project Manager and the DEN Recycle Yard Manager. Subsection 506.04 shall include the following:

The quantity to be paid for Riprap (Special) shall not be remeasured but will be the number of cubic yards designated in the contract and installed to the thickness shown on the contract plans. There will be no separate measurement unless there is an ordered change. Subsection 506.05 shall include the following:

Payment for Riprap (Special) shall include but is not limited to unclassified excavation for the material; subgrade preparation, furnishing and placing the material; and disposal of excess excavated material onsite. Payment shall be made at the contract unit price for the material and shall include full compensation for all labor, equipment, materials, transportation, and all other appurtenant items to complete the work.

Pay Item Pay Unit Riprap (Special) Cubic Yards

END OF SECTION




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NOVEMBER 2018

REVISION OF SECTION 601 STRUCTURAL CONCRETE

Section 601 of the Standard Specifications is hereby revised for this Project as follows: Subsection 601.03 shall include the following: The Contractor may incorporate recycled concrete coarse aggregate in all 601 Class P concrete placed on this Project, which shall meet the project specifications. The Contractor may manufacture the coarse aggregate using concrete obtained from the DEN South Recycling Yard. DEN will allot space within the recycling yard where the Contractor can manufacture and stockpile these materials. Any excess material that is remaining at the end of the project shall become the property of DEN. It is the Contractor’s sole responsibility to produce the coarse aggregates that meet the Project specifications from the materials found within the DEN South Recycling Yard or any other source. The Contractor shall be solely responsible for any materials that are recycled, reused, generated, or removed in connection with this project. Prior to the commencement of the manufacturing of coarse aggregates, the Contractor shall submit a Quality Control Plan for this Work. It shall include at a minimum the following: testing matrix for materials produced, outline of crushing and sieving procedure and a stockpile management plan. At the completion of the Project, the Contractor shall return any and all areas within the DEN South Recycling Yard that were disturbed to pre-Construction condition.




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NOVEMBER 2018

REVISION OF SECTION 601 AND 703 RECYCLED COARSE AGGREGATE STOCKPILE MANAGEMENT AND ASR MITIGATION

Section 601 of the Standard Specifications is hereby revised for this project as follows: Subsection 601.05 is revised to include the following: A source of recycled coarse aggregate shall be defined as a homogeneous stockpile developed in its entirety and tested pursuant to the Contract requirements. Each tested and established stockpile shall be kept separate from other stockpiles and protected from contamination. Should the Contractor amend a stockpile after testing, it shall be remixed as approved by the DEN Project Manager and retested by ATSM C1260. After initial aggregate testing and approval of the Concrete Mix Design Report, the Contractor shall test according to the requirements of ASTM C1260 at a frequency of one per 16,000 SY of PCCP or fraction thereof. If the results of subsequent tests indicate an increase in percent expansion of 0.05 or more, and the total expansion is 0.10 percent or more, this will represent a change in source. When a change in source has been determined, the combined aggregate matrix shall be retested pursuant to ASTM C1567, and a new Concrete Mix Design Report shall be required. All other specification requirements setting forth the need for a new Concrete Mix Design Report shall remain unchanged. The source for the recycled aggregate(s) is a stockpile located within the DEN South Recycling Yard. The Contractor shall expect deleterious material such as backer rod, joint seal, geotextile, etc. within the stockpiles. The Contractor shall be responsible for ensuring that stockpiled aggregates are clean and free from deleterious material or shall clean the stockpiled aggregates prior to production of specified materials. The AASHTO M80 deleterious substance maximum limit of 3% from Table 2 shall include other deleterious materials such as backer rod, joint seal, geotextile and any other harmful contaminants as identified by DEN. These other deleterious materials shall not exceed a maximum limit of 0.5% when tested by the Contractor pursuant to ASTM C123. The Contractor shall develop a stockpile management plan for the recycled coarse aggregate and submit to the DEN Project Manager as part of the Quality Control Plan. This plan shall include at a minimum:

1. Equipment requirements for crushing and stockpiling 2. Expected production rate 3. Planned stockpile sizes and methods to quantify 4. Cleaning options for stockpiled materials (i.e. washing, shaking, etc.)




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NOVEMBER 2018

REVISION OF SECTION 613 TELEPHONE RISER

Section 613 of the Standard Specifications is hereby revised for this project as following: Subsection 613.01 shall include the following: This work consists of furnishing and installing communication pedestals at the locations shown in the plans and in accordance with these specifications. Telephone Riser shall be quantified and paid for by the number of communication pedestals installed. Subsection 613.12 is hereby revised to include the following: Pay Item Pay Unit 613-50151 Telephone Riser Each All work necessary and incidental to the installation of the communication pedestals as shown in the plans will not be measured and paid for separately, but shall be included in the work.

END OF SECTION




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NOVEMBER 2018

REVISION OF SECTION 613 LIGHTING

Section 613 of the Standard Specifications is hereby revised for this project to include the following: In subsection 613.06, delete the fourth paragraph and replace with the following: LED light sources of the specified type and size shall be installed in the luminaires. The type and wattage of each light source shall be marked on each luminaire or pole. Subsection 613.06 Luminaires and Lamps paragraph shall be modified as follows: Luminaires shall be mounted on the luminaire arm with a pole top tenon mount or other approved device. Luminaires shall be adjusted vertically and horizontally to provide the required mounting height and maximum light distribution on the pedestrian walk and to meet Illuminating Engineering Society of North America (IES TM-15-2011) U0 requirements. After luminaires are installed and prior to their acceptance, lenses shall be cleaned to provide maximum lumen output.

Subsection 613.07 Conduit is hereby revised to include the following: The electrical conduit system shall be installed in accordance with CDOT’s, A Policy on the Accommodation of Utilities on Colorado Highways Rights-of-Way and the following: Plastic conduit shall be in accordance with subsection 715.04. All in earth conduits shall be trenched 48 inches. All trenched conduit shall be required to be in a red concrete encasement and shall be encased with a minimum of 3 inches on all sides, top and bottom. This red concrete encasement shall be quantified and paid for as “CONCRETE DUCT BANK” per linear foot pay item. Concrete shall conform to the requirements of Section 601. Concrete shall be red color throughout, Class B concrete. Where new conduit will be under the existing pavement not shown to be removed the contractor shall bore the conduit. All bored conduits do not need red concrete encasement. All 90 degree elbows and risers shall be galvanized rigid conduit with 40 mil. PVC factory bonded coating inside and out. All 90 degree elbows shall be large sweep 90’s. In the conduit system the locations of conduit, junction boxes, and expansion joints shown on the plans are approximate. Actual locations shall be established during construction. The conduit system shall be located to avoid interference with known present or known construction installations. All underground conduit runs and conduit risers on poles shall be installed as needed even though they may not be shown on the plans. All conduit installed under the roadway shall be at least 2 inch inside diameter unless otherwise designated on the plans. The CONTRACTOR may use larger conduit than specified. If larger conduit is used, it shall be for the entire run from outlet to outlet. Reducer couplings shall not be used. Larger conduits shall be sized to accommodate the constraints established by the hole in the pole anchor base plate.

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Conduit terminating in standards or pedestals shall extend approximately 2 inches vertically above the foundations and shall slope toward the junction box opening. Conduit entering pull boxes shall terminate 2 inches inside the box wall and 2 to 5 inches above the bottom and shall slope toward the top of the box to facilitate pulling of conductors. Conduit entering through the bottom of a pull box shall be located near the end walls to leave the major portion of the box clear. At all outlets, conduits shall enter from the direction of the run. The ends of all conduits, whether shop or field cut, shall be reamed to remove burrs and rough edges. Cuts shall be made square and true so that the ends will butt or come together for their full circumference. Non-metallic conduit shall be cut with a hacksaw or other approved tool. Non-metallic conduit connections shall be the solvent-weld type. Conduit connections at junction boxes shall be tightly secured and waterproofed. All conduit ends shall be sealed with duct seal after installation of wiring. The duct seal shall be rated for outdoor use. When specified, conduit shall be installed under existing pavement by jacking or drilling operations. Where plans show that existing pavement is to be removed, jacking the conduit is not required. Jacking or drilling pits shall maintain a minimum of 2 feet clear of the edge of pavement. Water shall not be used as an aid in the jacking or drilling operations. When trenching is specified to place conduit under existing pavement that is not to be removed, the trench width shall be 6 inches or less. Trenches shall be filled to 2 inches below the existing grade with structure backfill (flowfill), or another material if directed. The remaining 2 inches shall be filled to existing grade with hot mix asphalt within one calendar day after the roadway is trenched. Trenching shall be backfilled and compacted as follows: Backfill shall be deposited in uniform layers. Each layer shall be 6 inches or less thick prior to compaction. The space under the conduit shall be completely filled. The remainder of the trench and excavation shall be backfilled to the finished grade. The backfill material shall be compacted to the density specified in subsection 203.07. Each layer shall be mechanically compacted by tamping with power tools approved by the ENGINEER. Compaction methods or equipment that may damage the conduit shall not be used. Red electrical warning tape shall be installed between 6 inches and 12 inches below finished grade for all underground conduit runs. Underground conduit shall be buried a minimum of 4 feet below finished grade. There shall be no sag between boxes. Pull Boxes shall be placed at conduit ends, at all conduit angle points, and at all other locations shown on the plans. The CONTRACTOR may install additional pull or splice boxes to facilitate the work. Excavate minimum 24 inches below base depth of each pull box and refill with pea rock to promote draining of water. Placement and setback of the pull boxes shall be coordinated with the ENGINEER.

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Unless otherwise shown on the plans or directed by the ENGINEER, pull boxes shall be installed so the covers are level with at sidewalk grade. Covers shall be level with the surrounding finished ground when no grade is established. Where a conduit stub-out is called for on the plans, a sweeping elbow shall be installed in the direction indicated. All conduit stub outs shall be capped. Subsection 613.08 Wiring is hereby revised to include the following: All wiring shall be 600 Volt rated, Type: Conform to the applicable UL and ICEA Standards for the use intended. Copper conductors with 600-volt insulation unless otherwise specified or noted on the drawings. Stranded conductors for No. 8 and larger, with the exception of the ground rod conductor shall be #6 AWG solid, bare, copper and where elsewhere specified or noted on the drawings. Aluminum Conductors Prohibited: Aluminum conductors will not be permitted. Insulation: Type THWN/THHN insulation minimum unless otherwise specified or noted on the drawings. Size: No. 12 minimum unless otherwise specified or noted on the drawings. Not less than NEC requirements for the system to be installed. Color Coding: Phase, neutral and ground conductors color-coded in accordance with NEC. Connect all Conductors of the same color to the same phase conductor as follows: 480Y/277V-3PH-4W Color coding shall be:

1. A-Phase = Brown 2. B-Phase = Orange 3. C-Phase = Yellow 4. Neutral = Grey 5. Ground = Green

208Y/120V-3PH-4W Color coding shall be: 1. A-Phase = Black 2. B-Phase = Red 3. C-Phase = Blue 4. Neutral = White 5. Ground = Green

120/208V-1PH-3W Color coding shall be: 1. Line 1 = Black 2. Line 2 = Red 3. Neutral = White 4. Ground = Green

Unless otherwise authorized, the multiple system of electrical distribution shall be used. Conductors of the size and material specified shall be installed for control wiring, luminaire wiring, main circuit wiring, ground wiring, service entrance wiring, and all other wiring necessary for a complete installation.

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Conductors shall be sized to prevent a voltage drop of more than 3 percent per feeder run. All conductors shall be installed in conduit. All power and lighting circuits shall include an insulated green grounding conductor. A complete grounding system shall be installed for the entire lighting installation. Grounding shall consist of ground cables, conduits, grounding rods, wire or strap, and ground fittings, as required by the National Electrical Code. Type THWN conductors shall be used for all underground conduit runs. Leave sufficient lengths of branch conductors to allow conductor splices to be extracted from pole base for maintenance. Type XHHW shall be used for the service entrance conductors. Extend 3 No. 12 AWG Type THWN feeder leads to the luminaires from the cables in the pole base. Install in-the-line fuses on each feeder lead. Leave sufficient lengths of feeder conductors to allow fuses and conductors to be extracted from pole base for maintenance. Provide a No. 6 AWG solid, bare, copper wire connection to ground rod with ample length to allow connection to light standard, and system ground conductor. Attach grounding conductor to the energy suppliers neutral at the service point. Terminate grounding conductor with less than 25 ohms ground reference at the service point. If ground resistance is greater than 25 ohms, add additional ground rod(s) or other ground reference bond to bring the resistance to under 25 ohms resistance to earth. Provide ground rods elsewhere as shown on the drawings. Butt splices within the bases are not acceptable. At each pole, provisions shall be made for convenient sectionalizing of the circuits. This shall be done by providing ample length (18 to 24 inches) of branch conductor ends and performing splices using Burndy Uni-tap connectors or an approved equal. Wire nuts are not an acceptable method for splicing. Splicing shall only be performed within the pole bases and splice boxes where applicable. Subsection 613.09 is hereby revised to include the following: Lighting Control Center (Special) – Provide a NEMA 1 panelboard in a NEMA 4 enclosure with back panel and a NEMA 1 screwed cover termination box with (30) terminal strip with end caps, mounting hardware and marker strips. Provide a GFCI maintenance receptacle inside the NEMA 4 and (3) 3-inch close chase nipples between the panel and the termination box. “Arc-Flash Hazard Warning” labels shall be furnished and installed by the electrical contractor per the National Electric Code-2014 NEC 110.6 and the NFPA 70E-2015, and all other labels required by NFPA 70. Panelboard (225, 277/480V, 3-Phase) – Provide (2) new NEMA 1, 480Y/277V-3PH-4W panel board with 200A main circuit breaker of the same type as the existing panel ‘CC1’ & ‘CC2 to accommodate the re-use of all existing branch breakers.

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Branch Circuit Panel (Special) – Provide (17) new NEMA 3R, 120/208V-1PH-3W breaker box with 125A main lugs only, copper bus, surface mounted in each of the bus shelters. Power Transformer – Provide (3) new 75KVA, NEMA 3R, 480V-3ph primary, 208Y/120V-3PH-4W secondary, with copper windings, dry type transformer to feed the (3) new Lighting Control Center (Special) Shelter Distribution Panels. Concrete pad mount transformer on shared pad with “Lighting Control Center (Special)” equipment. Structure Mounted Disconnect Switch – Provide (2) new service entrance rated NEMA 3R, 600V-3P Fusible disconnect switch with separate neutral and ground copper bars. Contractor shall bond the neutral and ground bars for service entrance bond and bond to (2) ¾” x 10’-0” copper clad driven ground rods per NEC 250. See the one-line diagram for additional requirements. Pull Box (13” X 24” X 18”)– Excavate minimum 24 inches below base depth of each pull box and refill with pea rock to promote draining of water. Install a non-deliberate vehicle traffic flush in-grade polymer concrete bottomless box with TIER 22 rated bolted cover installed where shown on plans and details. Installed flush in the bus shelter raised concrete island adjacent to the bus shelter. Pull Box (24” X 36” X 18”)– Excavate minimum 24 inches below base depth of each pull box and refill with pea rock to promote draining of water. Install a non-deliberate vehicle traffic flush in-grade polymer concrete bottomless box with TIER 22 rated bolted cover in the parking lot on either side of the parking lot location sign post with parking yellow stripping around boxes to discourage vehicles from driving over boxes. Luminaire (LED)– Remove and replace all of the 750W HPS luminaires on the 70 foot light standards with new 73,673 Lumen, LED luminaires. Contractor to assure that the new luminaires will fit on mounting holes on the existing 70 foot light standards. Luminaire (LED) (11,000 Lumens) – Remove and replace all of the 150W HPS luminaires on the 20 foot light standards with new 11,615 Lumen, LED luminaires. Contractor to assure that the new luminaires will fit on mounting holes on the existing 20 foot light standards. Electrical Systems Modification – The contractor shall increase the amperage of all three services to accommodate a new 200A, 208Y/120V-3PH-4W bus shelter distribution panel system each. One new 75KVA transformer and one 200A panel for each of the three services.

1. Service #1 & #2 changes: a. Remove 200A, 480V, Main Service Disconnect ‘MSD1/2’ b. Remove feed thru Meter Housing c. Remove (2) 100A, 480V, Disconnect Switches ‘CC1DS’ & ‘CC2DS’ d. Remove (2) 100A, 480Y/277V-3PH-4W panels ‘CC1’ & ‘CC2’ e. Install new 400A Current Transformer Cabinet for both systems ‘CC1’ & ‘CC2’. f. Install (2) 200A, 480V, Service Entrance Rated Disconnect Switches ‘MSD1’ & ‘MSD2’ g. Install (2) 200A, 480Y/277V-3PH-4W panels ‘CC1’ & ‘CC2’

I. Reuse all existing branch breakers from the existing panels in the new panels. II. Install the new panels inside the NEMA 3R enclosure in the same location as the removed

panel. III. Provide a new 90A-3P branch breaker in the new panel for the new bus shelter distribution

system.

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2. Service #3 changes:




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a. Remove and replace the 125A fuses with new 200A fuses in ‘MSD3’. b. Remove and replace the 100A main circuit breaker with a new 200A main circuit breaker in existing

panel ‘CC3’. c. Provide a new 90A-3P branch breaker in the existing panel ‘CC1’ for the new bus shelter distribution

system. Lighting System and Power Connections (in Each Bus Shelter) – The contractor shall provide, install and make all electrical connections at each of the bus shelters shown on plans for the following equipment:

1. Install breaker panel in each of the shelters. Pay Item 613-81800 Branch Circuit Panel (Special) 2. Install pull boxes adjacent to shelter. One electric and one communications. Pay Item #613-07050 Pull

Box (13” x 24” x 18”) 3. GFCI duplex receptacle with back box and weatherproof while-in-use cover mounted at 60” A.F.F. 4. Interior lights – Lithonia #VSL-2-32-MVOLT-GEB10IS, 40-watt vandal resistant luminaire with LED

lamps controlled by photocell on roof. (2) required. 5. Photocell mounted on roof of bus shelter. 6. HVAC – 208V/11,600 BTU heat/cool. Wall mounted with integral thermostat control. 7. Power and communications connections to the telephone pedestal.

Subsection 613.11 shall include the following: Lighting Control Center (Special) shall be paid for at the contract unit price for each. Price and payment shall include transporting to job site installed and fully operational. Power Transformer shall be paid for at the contract unit price for each. Price and payment shall include transporting to job site installed and fully operational. Structure Mounted Disconnect Switch shall be paid for at the contract unit price for each. Price and payment shall include transporting to job site installed and fully operational. Concrete Duct Bank shall be paid for at the contract unit price per linear foot. Price and payment shall include transporting to job site including all forms and parts required to install the red concrete pour in-place encasement of conduits outside the parking lot area. Lighting System and Power Connections (in Each Bus Shelter) shall be paid for at the contract unit price for all parts and labor to install parts at each bus shelter site as one-unit price per site. Price and payment shall include transporting to job site installed and fully operational. Panelboard (225, 277/480V, 3-Phase) shall be paid for at the contract unit price for each. Price and payment shall include transporting to job site installed and fully operational. Branch Circuit Panel (Special) shall be paid for at the contract unit price for each. Price and payment shall include transporting to job site installed and fully operational. Concrete Foundation Pad shall be paid for at the contract unit price for each. Price and payment shall include transporting to job site, all forms and material necessary for the installation of the pad and removal of the forms and clean-up of the debris.

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NOVEMBER 2018

Light Standard Foundation and Light Standard Foundation Special shall be paid for at the contract unit price for each. Price and payment shall include transporting to job site, all forms and material necessary for the installation of the pad and removal of the forms and clean-up of the debris. Luminaire (LED) shall be paid for at the contract unit price for each. Price and payment shall include transporting all materials, removal of old 750W HPS luminaire, installing, leveling, the new LED luminaire and connection to the existing circuit so that it is fully operable. Luminaire (LED) (11,000 Lumens) shall be paid for at the contract unit price for each. Price and payment shall include transporting all materials, removal of old 150W HPS luminaire, installing, leveling, the new LED luminaire and connection to the existing circuit so that it is fully operable. Electrical System Modification shall be paid for at the contract lump sum unit price. Price and payment shall include transporting all material and all work as described in the 613.09 above. All systems shall be fully operational and excepted by the engineer.

F/A Electric Service Furnish and Install electrical service shall be paid for at the contract unit price per each. Price and payment shall include the cost of Xcel Energy to provide upgraded metered service at the locations shown on the plans. Subsection 613.12 is hereby revised to include the following: Pay Item Pay Unit 3/4 Inch Electrical Conduit LF 1 Inch Electrical Conduit (Bored) LF 1 1/4 Inch Electrical Conduit LF 2 Inch Electrical Conduit LF 2 Inch Electrical Conduit (Bored) LF 3 Inch Electrical Conduit LF 4 Inch Electrical Conduit LF 4 Inch Electrical Conduit (Bored) LF 3/4 Inch Electrical Conduit (Plastic) LF 1-1/4 Inch Electrical Conduit (Plastic) LF 2 Inch Electrical Conduit (Plastic) LF 3 Inch Electrical Conduit (Plastic) LF 4 Inch Electrical Conduit (Plastic) LF Electrical System Modifications L S Pull Box (24” x 36” x 18”) Each Pull Box (13” x 24” x 18”) Each Wiring L S Luminaire (LED) Each Luminaire (LED) (11,000 Lumens) Each Concrete Foundation Pad Each Light Standard Foundation Each Light Standard Foundation Special Each Lighting Control Center (Special) Each Lighting System and Power Connections (in Each Bus Shelter) Each Power Transformer Each Structure Mounted Disconnect Switch Each Panelboard (225, 277/480V, 3-Phase) Each Branch Circuit Panel (Special) Each




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NOVEMBER 2018

Concrete Duct Bank LF All work necessary and incidental to the installation of the electrical conduit as shown in the plans will not be measured and paid for separately but shall be included in the work.

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 614 SIGN POST (BOLLARD)

Section 614 of the Standard Specifications is hereby revised for this project as follows: Subsection 614.01 shall include the following: This work shall consist of installing sign post (bollard) and resetting existing bollards covers as shown on the plans in accordance with the signing details. The Contractor is responsible for all materials being in conformance with DEN Construction Standards.

Subsection 614.13 shall include the following: Sign post (bollard) will be measured by the actual number of sign post (bollard) installed. Subsection 614.14 shall include the following: Pay Item Pay Unit 614-00039 Sign Post (Bollard) Each All labor, equipment and materials required for the Sign Post (Bollard) pay item shall not be measured and paid for separately, but shall be included in the work.

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 622 SHELTER

Section 622 of the Standard Specifications is hereby revised for this project as follows: Subsection 622.01 shall include the following: This work shall consist of furnishing and installing shelters on bus islands per the manufacturer’s specifications. Subsection 622.02 shall include the following: All shelters shall conform to the following:

1. Dimensions – 6’-0” (D) x 12’-0” (W) x 12’-0” (H) (minimum), fully enclosed with insulated safety glass panels, bottom and top continuous frame, anchored to concrete slab, weather tight.

2. Door – 36” x 84” swinging clear anodized aluminum storefront door with safety glazing, with weather-stripping, ball bearing butt hinges, hydraulic closer, and hardware.

3. GFCI duplex outlet with weather proof in use cover, mounted 60” above grade. 4. Interior light – Lithonia #VSL-2-32-MVOLT-GEB10IS, 40-watt vandal resistant fixture with LED lamps,

2-required. Motion sensor and light switch installed in keyed lock box receptacle. 5. HVAC – 240V/11,600 BTU heat/cool wall mounted with integral thermostat control, installed in keyed

lock box receptacle. 6. Photo cell mounted on roof 7. Circuit breaker panel mounted 60” above grade – square-D #QO124L125GRB 120/240V, 24 spaces, 1ø-3

wire with ground bar, padlock cover, main breaker not included. 8. Location of state label/insignia and manufacturers data plate.

9. Glazing – tinted, Pilkington energy advantage low-E #3 insulated, tempered safety glazing set in painted

aluminum window frames. 10. Paint – finish shall be two tone color of choice, axalta imron polyurethane high gloss industrial coating,

shall be applied to all exposed metal surfaces. This excludes roof surface, and any stainless-steel components (if used).

11. Electrical – all wiring to be #12(min) stranded copper, THHN enclosed in ½” (min) E.M.T. per national electric code. All electrical equipment will be listed by U.L. or equivalent recognized circuits have green ground wire.

12. 6” canopy overhang on all sides. 13. Lifting ring(s) provided on roof.




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14. Shelter Elevation Examples: Figure 1: Front Elevation Figure 2: Side Elevation Subsection 622.03 shall include the following: Shop drawings for bus shelters shall be submitted to DEN Project Manager for approval prior to ordering. Subsection 622.14 shall include the following: Bus shelters shall be oriented as shown on the plans. Subsection 622.27 shall include the following: Shelter will be measured by the actual number of bus shelters. Subsection 622.28 shall include the following: Pay Item Pay Unit Shelter Each All labor, equipment and materials required for the Shelter pay item shall not be measured and paid for separately, but shall be included in the work.

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 630 PORTABLE MESSAGE SIGN PANEL

Section 630 of the Standard Specifications is hereby revised for this project as follows:

Subsection 630.01 shall include the following:

This work includes furnishing, operating, and maintaining a portable message sign panel.

Add subsection 630.031 immediately following subsection 630.03 as follows:

630.031 Portable Message Sign Panel. Portable message sign panel shall be furnished as a device fully self-contained on a portable trailer, capable of being licensed for normal highway travel, and shall include leveling and stabilization jacks. The panel shall display a minimum of three - eight character lines. The panel shall be a dot-matrix type with an LED legend on a flat black background. LED signs shall have a pre-default message that activates before a power failure. The sign shall be solar powered with independent back-up battery power. The sign shall be capable of 360 degrees rotation and shall be able to be elevated to a height of at least five feet above the ground measured at the bottom of the sign. The sign shall be visible from one-half mile under both day and night conditions. The message shall be legible from a minimum of 750 feet. The sign shall automatically adjust its light source to meet the legibility requirements during the hours of darkness. The sign enclosure shall be weather tight and provide a clear polycarbonate front cover.

Solar powered message signs shall be capable of operating continuously for 10 days without any sun. All instrumentation and controls shall be contained in a lockable enclosure. The sign shall be capable of changing and displaying sign messages and other sign features such as flash rates, moving arrows, etc.

Each sign shall also conform to the following:

(1) In addition to the onboard solar power operation with battery back-up, each sign shall be capable of operating on a hard wire, 100-110 VAC, external power source.

(2) All electrical wiring, including connectors and switch controls necessary to enable all required sign functions shall be provided with each sign.

(3) Each sign shall be furnished with an operating and parts manual, wiring diagrams, and trouble-shooting guide.

(4) The portable message sign shall be capable of maintaining all required operations under Colorado mountain-winter weather conditions.

(5) Each sign shall be furnished with an attached license plate and mounting bracket.

(6) Each sign shall be wired with a 7-prong male electric plug for the brake light wiring system.


The portable message sign panel shall be on the project site at least 14 days prior to the start of active roadway construction. Maintenance, storage, operation, relocation to different sites during the project, and all repairs of portable message sign panels shall be the responsibility of the Contractor.




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Portable message sign panels will be measured in the following way:

(1) By the maximum number of approved units in use on the project at any one time.


Pay Item Pay Unit

Portable Message Sign Panel Each

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 631 TOWING SERVICES

Section 631 of the Standard Specifications is hereby revised for this project as follows: Subsection 631 shall include the following: PART 1 – GENERAL

A. Description: The Contractor shall furnish all labor, equipment, material, supplies, signage, traffic control, and other incidentals necessary to provide Towing Services. Towing Services shall be limited vehicle relocation within the parking facility in association with the project, as designated in the plans.

B. Exclusions: a. The work included in this contract is separate from the “City Towing Services,” “On-Call Towing

Services,” and “DEN Standby/Contingency/Emergency Towing Services.” b. This service is not applicable to City-owned vehicles. c. This service is not applicable to vehicular accidents.

PART 2 – TOWING SERVICES REQUIREMENTS

A. The Contractor shall provide towing services at the request of the DEN Project Manager to relocate vehicles within the parking facility for the purposes of opening up designated areas for construction activity.

B. Towed vehicles shall be placed relocated to the Towing Depository Area as identified in the plans or as approved by the DEN Project Manager.

C. The Contractor shall prepare a vehicle relocation report and corresponding list for each vehicle moved which shall include:

a. Date and Time b. Vehicle Year c. Vehicle Make d. Vehicle Model e. Vehicle Identification Number (VIN) f. Vehicle License Plate Number g. Parking Bay and Stall Original h. Parking Bay and Stall Relocated i. Damage to the Vehicle j. Video and/or digital image documentation on each vehicle that is towed.

This data shall be submitted to the DEN Project Manager within 24 hours of the vehicles’ relocation for documentation purposes.

D. Towing of Vehicles shall be included in all parking facilities the work performed.

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E. The Contractor shall ensure that tow truck drivers carry in their truck(s), at all times, vehicle registration

and proof of all required insurances. Trucks must also have current inspection stickers affixed to the windshields and drivers must carry required Identification Cards at all times when providing services under this Contract. Furthermore, each tow driver is to be clean, neat, and professional in appearance, wear a name tag, wear a company uniform (shirt with logo) and communicate courteously with the public and DEN personnel, avoiding profane or vulgar language.

F. The Contractor shall obey all lawful orders issued by police officers from the Airport Security Office, Transportation Security Administration and by authorized DEN staff.

G. The Contractor shall ensure that tow truck drivers do not examine or unnecessarily disturb the contents (property, documents, etc.), of any serviced vehicles or allow any unauthorized persons into serviced vehicles. Furthermore, tow truck drivers are not to inspect the interiors of serviced vehicles.

H. The Contractor shall make certain not to attach to any vehicle which, by its size and/or weight, would make towing the vehicle an unsafe movement, and make certain that the manufacturer’s gross vehicle weight rating or the manufacturer’s rated capacity shall not be exceeded at any time. A tow truck and its load should never exceed the capabilities of the towing vehicle to safely accelerate, stop or maneuver.

I. The Contractor shall make certain that stop, brake, and tail lights are affixed on each side near the rear of the vehicle to be towed. The vehicle shall not be towed without these items first being attached to the vehicle. These stop, brake, and tail lights shall operate when those of the tow truck are activated. All lighting equipment installed on the tow truck shall be maintained in good working condition.

J. The Contractor shall make certain that all equipment such as winches, cables, clamps, thimbles, sheaves, guides, controls, blocks, slings, chains, hooks, go-jacks and hydraulic components, are assembled in accordance with factory recommendations and specifications and that all components are in good operable conditions and that the tow truck contains all of the equipment required herein.

K. The Contractor shall maintain appropriate fire extinguisher(s) on each tow vehicle.

L. The Contractor shall carry an electric flashlight or lantern of at least two cell capacity in good working condition on the tow vehicle, and carry adequate equipment (i.e. broom, shovel, etc.) in the event that any cleanup should be required.

M. The Contractor shall employ adequate safety chains when towing any vehicle and provide vehicular equipment (i.e. scotch blocks) and related hydraulic mechanisms that ensure adequate blocking needs for vehicle’s towing capacity/weight designation.

N. The Contractor shall maintain signage permanently affixed and displayed on each door or side panel providing the trade name of the company in letters no less than 4 inches in height. Such letters shall be clearly defined and free of runs or spots that make them difficult to read. The letters shall be of a color contrasting to the background on which they appear.

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PART 3 – PERSONNEL Personnel supplied by the Contractor shall meet the following requirements:

A. The Contractor shall have available sufficient qualified personnel to safely operate all specified equipment. Each driver/operator shall have a valid Colorado driver’s license.

B. All drivers shall operate the wreckers in a safe and prudent manner and shall refrain from using profane or vulgar language or being under the influence of alcohol or drugs in a public area while performing work under this agreement.

C. Tow vehicle drivers shall be employees of the Contractor and shall be covered under all applicable insurances required.

D. Soliciting: No soliciting for any purpose is allowed on the Airport premises by the Contractor’s employees. The Contractor shall inform its employees of this Agreement requirement prior to the time each employee shall begin work for the Contractor at DEN.

E. Gratuities: Neither the Contractor nor its employees, offices and agents shall solicit or accept gratuities for any reason whatsoever from any employee of the City or the General Public.

PART 4 – METHOD OF MEASUREMENT & PAYMENT The Towing Services shall be measured and paid for by each vehicle relocated from the parking areas to the Towed Vehicle Depository. The price shall be full compensation for furnishing all labor, equipment, tools, cleanup, reporting and incidentals necessary to complete the work as specified herein. Payment will be made under: Pay Item Pay Unit

631-00110 Tow with Single Light Duty Tow Vehicle Each 631-00120 Tow with Single Medium Duty Tow Vehicle Each (up to 6,500 lb. wheel lift)

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

REVISION OF SECTION 715 LIGHTING AND ELECTRICAL MATERIALS

Section 715 of the Standard Specifications is hereby revised for this project to include the following: Subsection 715.04.c is hereby revised to include the following: Luminaire (LED) shall be provided as follows: LED 4000K color temperature, approximately 67,531 Lumens, B4-U0-G5 Gardco Lighting #PFAS-276L-700-NW-G1-AR-4-UNV-DD-TLRD7[SHORTING CAP]-MGY with mounting hardware to match existing 70 foot light standard mounting holes or approved equal. Re-drilling wireway hole in pole will be required for this luminaire to match existing pole. Luminaire (LED) (11,000 Lumens) shall be provided as follows: LED 4000K color temperature, approximately 12,194 Lumens, B2-U0-G2 Gardco Lighting #ECF-S-32L-1A-NW-G2-AR-3-UNV-DD-TLRD7[SHORTING CAP]-MGY with RAM-KIT mounting hardware to match existing 20 foot light standard mounting holes or approved equal. Subsection 715.06 Conduit is hereby revised to include the following: All in earth conduits shall be schedule 80 PVC/HDPE with all 90 degree elbows and risers shall be galvanized rigid conduit with 40 mil. PVC factory bonded coating inside and out. All trenched conduit shall be required to be in a red concrete encasement and shall be encased with a minimum of 3 inches on all sides, top and bottom. This red concrete encasement shall be quantified and paid for as “CONCRETE DUCT BANK” per linear foot pay item. Concrete shall conform to the requirements of Section 601. Concrete shall be red color throughout, Class B concrete. Where new conduit will be under the existing pavement not shown to be removed the contractor shall bore the conduit. All bored conduits do not need red concrete encasement. Conduits shall be routed in common trenches wherever possible. Conduit burial racking shall be used to maintain proper spacing and stacking. When a red concrete encasement is required racking for spacing and stacking shall be set prior to red concrete pour. All bored conduits shall be installed without red concrete encasement. Subsection 715.07 is hereby revised to include the following:

All wiring on this project shall be copper, rated for outdoor use (e.g. THWN, THWN-2, XHHW). All conduit sized on plans were sized using THWN copper sheathed wires, any other sheathing type may result in the contractor need to size up the conduit to accommodate the different wire type at no additional cost to the project. Wire sizes #14 AWG through #10 AWG shall be solid copper. Wire size #8 AWG and larger shall be stranded copper with the exception of service ground conductors to ground rods shall be #6 soft drawn bare (solid) copper unless otherwise noted on plans. See plans and details for the wire sizes to different systems. All conductor sizes shall be (at the minimum) sized to the breaker amperage feeding the circuit, per the NEC table 310.16. Increased sizes on plans are shown for voltage drop purposes.




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NOVEMBER 2018

2 Subsection 715.08 is hereby revised to include the following: Lighting Control Center (Special) – Lighting Control Center (LCC) for this project the lighting control center shall include but not limited to the following:

1. Enclosure – Enclosure to be NEMA 4, 12ga., hot dipped galvanized, continuously welded seams ground to a smooth finish, re-enforced bracing wherever necessary, minimum size 48 inch wide x 72 inch high x 16 inch deep, bottomless, with heavy-duty mounting flange on base, mount directly to concrete pad (no leg kit) with minimum of six ½ inch x 8 inch concrete anchors. Provide piano hinged door with document pocket on inside of door and back panel. Enclosure shall be sized to fit all components listed below. Size up enclosure as needed without increasing the height above 72 inches. Interior to be painted white. Paint entire enclosure and all exterior exposed conduit and equipment mounted on the enclosure standard color gray to match.

2. Panel Board – NEMA 1, 200A MCB, 208Y/120V-3PH-4W copper bus panel, see the panel schedule for number of poles, main and branch breakers. Square-D #NQOD442L225CU (interior bus) with #MH50 (box), MHC50(S) (mono-flat cover) and #PK23GTAL (ground bar) or approved equal by GE, Eaton or Cutler-Hammer. Mounted inside the NEMA 4 enclosure. New panelboards to be braced at rating listed on the one-line diagram and/or the panel schedules, whichever is higher.

3. Terminal Box – 24” x 36” x 12” dp., NEMA 1 screwed cover box with back panel and all mounting hardware. Mounted inside the NEMA 4 enclosure.

4. Terminal Strip – 600V rated, insulated, terminal strips with lugs to accept 6-300KCMIL AWG copper wire, all end caps, mounting hardware and marker strips number of points as required, minimum of thirty (30) points. Mount inside the terminal box item #3 above.

5. Close Nipples – Three (3) 3” close chase nipples between panel (item #2 above) and the terminal box (item #3 above.

6. Maintenance Receptacle – 20A, 120V, GFCI duplex receptacle in 1-gang back box and cover plate. Mounted inside the NEMA 4 enclosure

7. Ground Rods – ¾ inch x 10 foot long, copper-clad driven ground rods, Exothermic weld or direct bury rated lug connect ground conductor to ground rods. Two rods required for this pay item, installed a minimum of eight feet apart.

8. There are three lighting control center (special)’s required for this project. 9. “Arc-Flash Hazard Warning” labels shall be furnished and installed by the electrical contractor per the

National Electric Code-2017 NEC 110.16 and the NFPA 70E-2015, and all other labels required by NFPA 70.

Contractor shall furnish all wiring, fasteners and other materials incidental to the completion of the Lighting Control Center. See the plan details for other components needed for the lighting control centers on this project. Panelboard (225, 277/480V, 3-Phase) - shall include but not limited to the following:

1. New NEMA 1, 480Y/277V-3PH-4W panel board with copper bus, 200A main circuit breaker and all new branch breakers as indicated on the plans.

2. New panelboard shall be the same manufacturer and model number as the existing panel ‘CC1’ & ‘CC2’. New panel shall accept the existing breaker types from the existing panels to accommodate the re-use of all existing branch breakers.

3. New panelboards to be braced at rating listed on the one-line diagram and/or the panel schedules, whichever is higher.




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4. “Arc-Flash Hazard Warning” labels shall be furnished and installed by the electrical contractor per the National Electric Code-2017 NEC 110.16 and the NFPA 70E-2015, and all other labels required by NFPA 70.

Branch Circuit Panel (Special) – shall include but not limited to the following:

1. New NEMA 3R, 120/208V-1PH-3W panel board with copper bus, 125A main lugs only 2. Provide number of poles and all branch and main breakers as indicated on the panel schedules. 3. New panelboards to be braced at rating listed on the one-line diagram and/or the panel schedules,

whichever is higher. 4. “Arc-Flash Hazard Warning” labels shall be furnished and installed by the electrical contractor per the

National Electric Code-2017 NEC 110.16 and the NFPA 70E-2015, and all other labels required by NFPA 70.

Power Transformer – shall include but not limited to the following: 1. New 75KVA, NEMA 3R, Dry type distribution. 2. Voltage: 480V-3ph primary, 208Y/120V-3PH-4W secondary. 3. Cores: Grain-oriented, non-aging silicon steel 4. Coils: Continuous windings without splices except for taps

a. Internal coil Connections: Brazed or Pressure type. b. Coil Material: Copper

5. Factory-assembled and -tested, air-cooled units for 60-Hz service. 6. Mounting: Concrete Pad

Structure Mounted Disconnect Switch – shall include but not limited to the following:

1. Labeling: Main Disconnect Switch ‘MDS1’ & ‘MDS2’ 2. Service Entrance Rated 3. Heavy Duty, NEMA 3R, & NEMA KS 1, Type HD 4. 600V-3P Fusible disconnect switch 5. Lockable handle with capability to accept two padlocks and interlocked with cover in the closed position. 6. Separate neutral and ground bars.

a. Labeled for copper conductors. b. Ground bar non-insulated, Capable of being grounded and bonded. c. Neutral bar insulated, Capable of being grounded and bonded.

7. “Arc-Flash Hazard Warning” labels shall be furnished and installed by the electrical contractor per the National Electric Code-2017 NEC 110.16 and the NFPA 70E-2015, and all other labels required by NFPA 70.

8. Fuses: Cartridge fuses rated 600V comply with NEMA FU 1 a. Size as indicated on the one-line diagram b. Class RK1, fast acting c. Mount fuse in switch so rating information label can be easily readable without removing fuse.




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NOVEMBER 2018

4 Pull Box (13” X 24” X 18”)– Provide a heavy duty, flush in-grade, polymer concrete, bottomless box with TIER 22 rated bolted cover. Nominal size shall be 13 inches wide by 24 inches long and 18 inches deep. The cover shall have engraved lettering as follows: S1= ‘ELECTRIC’ C1=’COMMUNICATIONS’ Pull Box (24” X 36” X 18”)– Provide a heavy duty, flush in-grade, polymer concrete, bottomless box with TIER 22 rated bolted cover. Nominal size shall be 24 inches wide by 36 inches long and 18 inches deep. The cover shall have engraved lettering as follows: S2= ‘ELECTRIC’ C2=’COMMUNICATIONS’

END OF SECTION




ISSUED FOR BID


NOVEMBER 2018

TRAFFIC CONTROL PLAN - GENERAL The key elements of the Contractor's method of handling traffic (MHT) are outlined in subsection 630.10(a). The components of the TCP for this project are included in the following: (1) Subsection 104.04 and Section 630 of the specifications. (2) Standard Plan S-630-1, Traffic Controls for Highway Construction, and Standard Plan S-630-2. (3) Schedule of Construction Traffic Control Signs and Tabulation of Construction Traffic Control Devices Unless otherwise approved by the Engineer, the Contractor’s equipment shall follow normal and legal traffic movements. The Contractor’s ingress and egress of the work area shall be accomplished with as little disruption to traffic as possible. Traffic control devices shall be removed by picking up the devices in a reverse sequence to that used for installation. This may require moving backwards through the work zone. When located behind barrier or at other locations shown on approved traffic control plans, equipment may operate in a direction opposite to adjacent traffic. Traffic Control Management and Traffic Control Inspection will not be approved for payment by the Engineer for any date before the contract time has commenced or after the contract time has expired. Special Traffic Control Plan requirements for this project are as follows: During the construction of this project, traffic shall use the present traveled roadway unless identified on the plans or approved by the Engineer. The Contractor shall have a maximum of 1 work zone in place at any time during construction. The Contractor shall not have construction equipment or materials in the lanes open to traffic at any time. All personnel vehicles and construction equipment parking shall be located where it does not conflict with clear zones, safety, access or the flow of traffic. No personal vehicles shall be allowed in parking lot. Workers shall not access the work areas by crossing roadways open to traffic unless proper traffic control and a protection plan is in place or other necessary precautions are provided. During the proposed work, one lane in each direction shall be maintained on all roadways unless approved by the Engineer. Traffic shall not be stopped unless previously approved by the Engineer. No lanes shall be closed during non-working hours unless otherwise approved by the Engineer. During non-working hours, the roadways shall be restored to safe travel conditions for the free flow of traffic. The Contractor shall maintain at its own expense that portion of the existing roadway being used to carry traffic so that traffic may readily pass over it. The Contractor shall not have workers or equipment operating adjacent to lanes open to traffic and/or unprotected. At least 14 calendar days prior to starting construction, the Contractor shall have the Portable Message Sign Panels on site and working in the locations as directed by the Engineer. The sign message shall warn travelers of the upcoming construction and shall include the planned start date.

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Representatives of the Contractor and the Traffic Control subcontractor authorized to make traffic decisions shall be “on-call” and available to respond within 45 minutes of notification by the Engineer or other authorized representative. The Contractor shall provide each flagger, the Traffic Control Supervisor, and the Project Engineer with a minimum 5-watt VHF radio in order to provide adequate communications during construction. The radios shall have sufficient range to communicate a minimum of 5 miles. The method of handling traffic (MHT) submitted by the Contractor shall address radio communications. Providing VHF radios and all costs associated with their use will not be paid for separately but shall be included in the work. During construction, the Contractor shall be responsible for maintaining existing permanent signing on temporary sign supports throughout the project. This work will not be paid for separately, but shall be included in the work. This project requires full compliance pavement marking at the end of each work day unless otherwise directed by the Engineer, including lane lines, edge lines, and channelizing lines. Whenever the Contractor removes, obliterates, or overlays any pavement markings, the Contractor shall replace them on a daily basis prior to opening the affected areas to traffic. Although Traffic Control items such as Portable Message Sign Panels, Traffic Control Management, and Traffic Control Inspection may be required prior to the beginning of contract time, no payment will be made for the prior to the beginning of contract time. All work performed prior to commencement of Contract time shall be considered subsidiary to mobilization. The Contractor shall provide a Traffic Control Supervisor with at least 1 year of experience in highway construction after certification as a Traffic Control Supervisor. A copy of the certification of Traffic Control Supervisor, resume, and valid current driver’s license shall be provided to the Engineer at least 2 days prior to the project preconstruction conference for approval. All lane closures shall be subject to the approval of the Engineer. A meeting will be scheduled each working day with the Contractor’s Superintendent, the Traffic Control Supervisor(s), and the Project Engineer for discussion, submittal and approval of the MHT(s) for the next day’s scheduled work. Work that has not been scheduled and requires a MHT that has not been approved shall not be allowed. Work which does not require a MHT may proceed if approved by the Engineer. The required TCS Diary(s) shall be submitted to the Engineer before 10:00 a.m. each following day and shall include a listing of all flagging hours, labor hours, and traffic control devices in use. The TCS Diary(s) shall be checked and approved by the Contractor prior to the submittal to the Engineer. The TCS shall submit a separate daily flagger sign-in sheet to the Engineer before 10:00 a.m. the following day that includes the date and name(s) of all flaggers on the project for each day. Failure to submit the TCS Diary(s) and daily flagger sign-in sheet(s) to the Engineer by 10:00 a.m. the following day may result in delayed or withholding of payment for Traffic Control Management and Traffic Control Inspection pay items at the discretion of the Engineer. All costs incidental to the foregoing requirements shall be included in the original contract prices for the project.

END OF SECTION

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