NATURAL GAS

CONSTRUCTION STANDARDS

AND

COMPATIBLE UNITS

City Utilities of Springfield, Missouri

REVISED: 12/15/2021

**DISCLAIMER**

IT IS THE RESPONSIBILITY OF THE END USER OF THIS GAS STANDARDS BOOK TO MAKE SURE THAT THEY ARE USING THE MOST

CURRENT STANDARD. THE MOST CURRENT STANDARDS CAN BE FOUND AT

https://www.cityutilities.net/business/construction/gasstds/

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Recommended Changes InConstruction Standards

Priority:

Date:

To: Committee Chairman - Gas Engineering

The following is a recommended change to Section Page Number , or Drawing

Submitted by: , Department: , Date:

Recommended Change: (If feasible, show recommended change on a copy of the Standard and attach to form).

Reason for Change:

Action:

GAS CONSTRUCTION STANDARDS DRAWING INDEX

100 SERIES - GAS MAIN INSTALLATION

Revision Date

GS-100 10/15/2021 GAS MAIN TRENCH - TYPICAL CROSS SECTION

GS-101 10/15/2021 GAS MAIN TRENCH - UNDER PAVEMENT TYPICAL CROSS SECTION

GS-102 5/21/2001 REQUIRED GAS MAIN DEPTHS

GS-104 10/15/2021 TYPICAL END OF MAIN CROSS SECTION JOINT TRENCH

GS-108 10/15/2021 INSTALLATION OF MAIN IN SOLID ROCK BY USE OF TRENCHER

GS-109 10/15/2021 GAS & FIBER OPTIC CABLE JOINT TRENCH - TYPICAL CROSS SECTION

GS-110 2/5/2001 MINIMUM BENDING RADIUS FOR POLYETHYLENE GAS PIPE

GS-117 1/24/2003 SIDE TAP OFF OF STEEL MAIN USING 3-WAY TEE STEEL VALVES

GS-118 5/21/2001 SIDE TAP OFF OF STEEL MAIN USING 3-WAY TEE PLASTIC VALVE

GS-120 10/9/2001 INSERTION OF STEEL PIPE THROUGH UNCASED BORE

GS-126 1/3/2019 ABANDONMENT OF GAS MAINS WITH ASBESTOS-CONTAINING MATERIALS

GS-130 4/10/2019 INSTALLATION OF PLASTIC GAS MAIN THROUGH CASING

GS-135 4/10/2019 INSTALLATION OF GAS MAIN THROUGH STEEL CASING

GS-150 4/2/2013 PRESSURE CONTROL FITTING INSTALLATION

GS-160 10/15/2021 PLASTIC VALVE INSTALLATIONS

GS-165 10/15/2021 STEEL VALVE INSTALLATIONS

GS-168 5/21/2001 WARNING MARKER FOR VALVE BOX

GS-170 9/16/2020 TYPICAL EXTENSION TYPE VALVE BOX

GS-178 4/10/2019 INSTALLATION OF GAS CASING TRENCHLESS METHODS

GS-190 2/12/2018 PLASTIC PIPE FUSION COOLING TIMES

GS-195 6/18/2018 SQUEEZE OFF PROCEDURE

Revised : 12/15/2021

GAS CONSTRUCTION STANDARDS DRAWING INDEX

200 SERIES - TAPS, SERVICE LINES, AND RISERS

Revision Date

GS-200A 10/15/2021 INSTALLATION OF 3/4" PLASTIC SERVICE FROM PLASTIC MAIN

GS-200B 10/15/2021 INSTALLATION OF 1-1/4" PLASTIC SERVICE FROM PLASTIC MAIN

GS-200C 10/15/2021 INSTALLATION OF 2" PLASTIC SERVICE FROM PLASTIC MAIN

GS-203A 10/15/2021 SERVICE RENEWAL BY INSERTION WITH 1/2" PLASTIC - HP & IP DISTRICTS ONLY

GS-203B 10/15/2021 SERVICE RENEWAL BY INSERTION WITH 1/2" PLASTIC USING COMBINATION TAP TEE - HP & IP

DISTRICTS ONLY

GS-204 10/15/2021 LATERAL RENEWAL BY INSERTION WITH 1/2" PLASTIC - HP & IP DISTRICTS ONLY

GS-205 10/15/2021 GAS SERVICE TRENCH SAND BEDDING REQUIREMENTS

GS-210A 10/15/2021 INSTALLATION OF 3/4" SERVICE FROM STEEL MAIN

GS-210B 10/15/2021 INSTALLATION OF 1-1/4" OR 2" SERVICE FROM STEEL MAIN

GS-212 4/15/2021 EXCESS FLOW VALVE (EFV) AND SERVICE VALVE INSTALLATION FOR ALL SERVICES

GS-213 2/13/2020 EXCESS FLOW VALVE (EFV) SIZING CHART FOR HP & IP DISTRICTS

GS-216 9/5/2018 SERVICE RETIREMENTS

GS-220 4/1/2017 CONNECTION TO EXISTING PLASTIC GAS LATERAL

GS-225 10/15/2021 TYPICAL GAS LATERAL INSTALLATION DETAIL

GS-230 10/15/2021 (WS-300) TYPICAL GAS & WATER LATERAL INSTALLATION DETAIL

GS-235 10/15/2021 3/4" ANODELESS PRE-BENT RISER

GS-236 9/5/2018 3/4" RESIDENTAL SERVICE RISER WITH FOUNDATION BRACKETS

GS-240 10/15/2021 1-1/4" ANODELESS PRE-BENT RISER WITHOUT BYPASS

GS-250A 9/16/2020 2" ANODELESS PRE-BENT RISER WITH BYPASS

GS-250B 9/16/2020 2" ANODELESS PRE-BENT RISER WITHOUT BYPASS

GS-251 10/15/2021 4" ANODELESS PRE-BENT RISER WITH BYPASS

GS-265 1/27/2017 RESIDENTIAL GAS SERVICE STUB-OUT

GS-268 10/15/2021 COMMERCIAL GAS SERVICE STUB-OUT

GS-270 1/27/2017 ACCEPTABLE GAS SERVICE LINE AND METER LOCATIONS FOR RESIDENCES

Revised : 12/15/2021

GAS CONSTRUCTION STANDARDS DRAWING INDEX

300 SERIES -METER SETS

Revision Date

GS-300 1/3/2019 175 OR 250 DIAPHRAGM METER SET USING METER BAR ALL PRESSURE DISTRICTS 3/4" RISER

GS-301 1/3/2019 175 OR 250 DIAPHRAGM METER SET USING METER BAR ALL PRESSURE DISTRICTS 1-1/4" RISER

GS-305 12/5/2006 175 OR 250 DIAPHRAGM DUAL METER SET - ALL PRESSURE DISTRICTS

GS-307 6/12/2019 TRAILER PARK YARD LINE - FOR REMOTE METER SETTING

GS-308 4/10/2019 REGULATOR SELECTION CHART FOR ALL PRESSURE DISTRICTS 7 IWC GAS PRESSURE

GS-309 9/16/2020 MULTI METER SETTINGS - ALL PRESSURE DISTRICTS

GS-310A 3/29/2018 AL-425, AC-630, OR AC-800 DIAPHRAGM METER SET - 3/4" RISER HP DISTRICT

GS-310B 3/29/2018 AL-425, AC-630, OR AC-800 DIAPHRAGM METER SET - 3/4" RISER IP DISTRICT

GS-310C 3/29/2018 AL-425, AC-630, OR AC-800 DIAPHRAGM METER SET - 3/4" RISER LP DISTRICT

GS-312 5/3/2007 5C-TI & 8C-TI ROTARY METER INSTALLATION OF MULTI METER HEADER WITH 1" STOPS

GS-313 5/3/2007 5C-TI & 8C-TI ROTARY METER INSTALLATION OF MULTI METER HEADER WITH 1 1/2" STOPS

GS-314A 5/3/2007 8C THRU 3M ROTARY METER INSTALLATION OF MULTI METER HEADER WITH 1 1/2" STOPS

GS-314B 5/3/2007 8C THRU 3M ROTARY METER INSTALLATION WITH BYPASS CAPABILITIES OF MULTI METER HEADER

WITH 1 1/2" STOPS

GS-315A 3/29/2018 AL-425, AC-630, OR AC-800 DIAPHRAGM METER SET - 1-1/4" RISER HP DISTRICT

GS-315B 3/29/2018 AL-425, AC-630, OR AC-800 DIAPHRAGM METER SET - 1-1/4" RISER IP DISTRICT

GS-315C 3/29/2018 AL-425, AC-630, OR AC-800 DIAPHRAGM METER SET - 1-1/4" RISER LP DISTRICT

GS-317A 12/15/2021 AL-800 OR AL-1000 DIAPHRAGM METER SET - 1-1/4" RISER HP DISTRICT

GS-317B 12/15/2021 AL-800 OR AL-1000 DIAPHRAGM METER SET - 1-1/4" RISER IP DISTRICT

GS-317C 12/15/2021 AL-800 OR AL-1000 DIAPHRAGM METER SET - 1-1/4" RISER LP DISTRICT

GS-326A 4/10/2019 2M OR 3M ROTARY METER SET HP DISTRICT

GS-326B 5/1/2017 2M OR 3M ROTARY METER SET IP DISTRICT

GS-326C 1/27/2017 2M OR 3M ROTARY METER SET LP DISTRICT

GS-327A 1/27/2017 8C, 11C OR 15C ROTARY METER SET - HP DISTRICT

GS-327B 1/27/2017 8C, 11C OR 15C ROTARY METER SET - IP DISTRICT

GS-327C 5/1/2017 8C, 11C OR 15C ROTARY METER SET - LP DISTRICT

GS-365A 1/27/2017 5M OR 7M ROTARY METER SET - HP DISTRICT

GS-365B 1/27/2017 5M OR 7M ROTARY METER SET - IP DISTRICT

GS-365C 1/27/2017 5M ROTARY METER SET - LP DISTRICT

GS-380A 12/14/2006 5C-TI OR 8C-TI THREADED ROTARY METER SET ON EXISTING FLANGED RISER HP DISTRICT

GS-380B 12/14/2006 5C-TI OR 8C-TI THREADED ROTARY METER SET ON EXISTING FLANGED RISER IP DISTRICT

GS-380C 6/12/2019 5C-TI OR 8C-TI THREADED ROTARY METER SET ON EXISTING FLANGED RISER LP DISTRICT

GS-381A 12/14/2006 5C-TI OR 8C-TI THREADED ROTARY METER SET HP DISTRICT

GS-381B 12/14/2006 5C-TI OR 8C-TI THREADED ROTARY METER SET IP DISTRICT

GS-381C 6/12/2019 5C-TI OR 8C-TI THREADED ROTARY METER SET LP DISTRICT

Revised : 12/15/2021

GAS CONSTRUCTION STANDARDS DRAWING INDEX

300 SERIES -METER SETS (CONT'D)

Revision Date

GS-390A 12/14/2006 175 OR 250 - 2 PSIG DELIVERY - DIAPHRAGM METER SET - HP & IP DISTRICTS

GS-390B 4/2/2013 AL-425, AC-630, OR AC-800 - 2 PSIG DELIVERY - DIAPHRAGM METER SET - 3/4" RISER - HP & IP

DISTRICTSGS-390C 4/2/2013 AL-425, AC-630, OR AC-800 - 2 PSIG DELIVERY - DIAPHRAGM METER SET - 1-1/4" RISER - HP & IP

DISTRICTSGS-390D 4/2/2013 175 OR 250 - 2 PSIG DELIVERY - DIAPHRAGM METER SET - HP & IP DISTRICTS 1-1/4" RISER

GS-391A 12/14/2006 8C, 11C OR 15C - 2PSIG DELIVERY - ROTARY METER SET HP DISTRICT

GS-391B 12/14/2006 8C, 11C OR 15C - 2PSIG DELIVERY - ROTARY METER SET IP DISTRICT

GS-392A 12/14/2006 2M OR 3M - 2 PSIG DELIVERY - ROTARY METER SET HP DISTRICT

GS-392B 12/14/2006 2M OR 3M - 2 PSIG DELIVERY - ROTARY METER SET IP DISTRICT

GS-393A 12/20/2013 5M OR 7M - 2 PSIG DELIVERY - ROTARY METER SET - HP DISTRICT

GS-393B 12/20/2013 5M - 2 PSIG DELIVERY - ROTARY METER SET - IP DISTRICT

GS-393C 12/20/2013 7M - 2 PSIG DELIVERY - ROTARY METER SET - IP DISTRICT

GS-394A 12/20/2013 5M - 5 PSIG DELIVERY - ROTARY METER SET - HP DISTRICT

GS-394B 12/20/2013 7M - 5 PSIG DELIVERY - ROTARY METER SET - HP DISTRICT

GS-394C 12/20/2013 5M - 5 PSIG DELIVERY - ROTARY METER SET - IP DISTRICT

GS-394D 12/20/2013 7M - 5 PSIG DELIVERY - ROTARY METER SET - IP DISTRICT

Revised : 12/15/2021

GAS CONSTRUCTION STANDARDS DRAWING INDEX

400 SERIES - CORROSION PROTECTION

Revision Date

GS-400 5/3/2007 ANODE INSTALLATION ON STEEL GAS PIPELINE

GS-410 6/11/2018 CATHODIC PROTECTION TEST STATIONS

GS-415 5/3/2007 THERMITE WELDING PROCEDURE

GS-420 4/7/1992 FLANGE INSULATING KIT

GS-430 1/8/1998 1/2 LB ANODE INSTALLATION ON STEEL RISER, PLASTIC SERVICE WITH LOW P/S READING

GS-435 10/15/2021 STEEL GAS MAIN CROSSING REWORK

GS-440 10/15/2021 SERVICE LINE CROSSING REWORK

GS-450 5/9/2013 PROTECTIVE COATINGS FOR STEEL PIPING

Revised : 12/15/2021

GAS CONSTRUCTION STANDARDS DRAWING INDEX

500 SERIES - MISCELLANEOUS

Revision Date

GS-500A 4/2/2013 FLANGE ASSEMBLY - BOLT SCHEDULE 150# CLASS

GS-500B 4/2/2013 FLANGE ASSEMBLY - BOLT SCHEDULE 300# CLASS

GS-500C 4/2/2013 FLANGE ASSEMBLY - BOLT SCHEDULE 600# CLASS

GS-505 9/25/2003 TYPICAL BARRICADES

GS-507 1/8/1998 TYPICAL METER SET BARRICADES

GS-510 1/8/1998 TYPICAL GAUGE TAP

GS-511 5/15/2012 TYPICAL 1/2" GAUGE TAP

GS-513 12/14/2006 METER SET BYPASS - 3/4" VALVE TAP

GS-514 5/3/2007 METER SET BYPASS - 1" VALVE TAP

GS-515 12/20/2013 METER SET BYPASS - 1-1/2" VALVE TAP

GS-516 12/15/2021 METER SET BYPASS - 2" VALVE TAP

GS-520A 5/3/2007 TYPICAL PIPE SUPPORT FOR 2" & SMALLER PIPE

GS-520B 5/3/2007 FABRICATED PIPE SUPPORT FOR 3" & 4" PIPE

GS-520C 5/3/2007 TYPICAL PIPE SUPPORT FOR 6" & LARGER PIPE

GS-525 9/16/2020 DESIGNATING GAS VALVES (UNDERGROUND DISTRIBUTION ONLY)

GS-530 6/18/2018 PIPELINE MARKERS

GS-535 1/27/1999 GAS MAIN SEGMENT NUMBER DESCRIPTION

GS-540 4/13/2000 WARNING SIGN LOCATION FOR UNDERGROUND REGULATOR VAULT

GS-545 4/13/2000 WARNING SIGN LOCATION FOR ABOVE GROUND REGULATOR STATIONS

GS-550 6/27/2000 TYPICAL CONSTRUCTION STAKING SYMBOLS

GS-555 3/16/2021 PRESSURE TESTING OF MAINS AND SERVICES

GS-560 2/13/2020 ABOVE GRADE METER SET PAINTING

Revised : 12/15/2021

GAS CONSTRUCTION STANDARDS DRAWING INDEX

600 SERIES - SEDIMENTATION & EROSION CONTROL

ES-610 3/14/2013 INSTALLATION OF EROSION CONTROL MATTING

ES-620 3/14/2013 CURB INLET PROTECTION

ES-630 3/14/2013 INSTALLATION OF GUTTER CHECKS FOR SEDIMENT CONTROL

ES-631 11/5/2014 AREA INLET FOR SEDIMENT CONTROL

ES-640 3/14/2013 DITCH CHECKS FOR SEDIMENT AND EROSION CONTROL

ES-650 3/14/2013 PERMITER FLOW FROM JOBSITE FOR RUN-OFF CONTROL

Revised : 12/15/2021

100 Series

Gas Main Installation

200 Series

Taps, Service Lines, And Risers

RUBBER PLUGSSIZE STOCK ITEM3/4" 2064761" 206478

1-1/4" 2064801-1/2" 206482

2" 206484

300 Series

Meter Sets

INLETPRESS.

DELIVERYPRESS.

CONNECTEDLOAD (SCFH)

400 Series

Corrosion Protection

500 Series

Miscellaneous

DETERMINING THEPROPER DESIGNATION OF

AN UNDERGROUNDDISTRIBUTION SYSTEM

VALVE

IS THEVALVE LOCATED

ON A MAIN ORSERVICE

LINE?

MAIN

ISIT A DOT

VALVE ASDESCRIBED BY

THE O&M MANUAL?- DOES THE VALVE

CONTROL A DISTRICTREGULATOR STATION?- IS THE VALVE BEINGUSED TO ISOLATE A

ZONE WHICH CAN BERELIT IN

8 HOURS?

YESE-VALVE

NOR-VALVE

SERVICE

ISTHE VALVE

SERVING A RISKCATEGORY III OR IV

BUILDING, ASDEFINED BY THEINTERNATIONAL

BUILDINGCODE?

YES

NO

ISTHE STAMPED DATA PLATE

CAPACITY OF THEMETER OR METERS

SERVED BY THEVALVE GREATERTHAN 1000 CFH?

(COMBINEDCAPACITY FORMULTI-METER)

PS-VALVEYES

P-VALVE NO

S-VALVEYES

N-VALVE(NO INSPECTION CYCLE)

NO

ISTHE STAMPED DATA PLATE

CAPACITY OF THEMETER OR METERS

SERVED BY THEVALVE GREATERTHAN 1000 CFH?

(COMBINEDCAPACITY FORMULTI-METER)

E-VALV

E P-VALVE

S-VALVE R-VALV

E

PS-VALVE

CODE DRIVEN VOLUNTARY

1 YEARINSPECTION

CYCLE

5 YEARINSPECTION

CYCLE

CODE DRIVEN VOLUNTARY

1 YEARINSPECTION

CYCLE

5 YEARINSPECTION

CYCLE

1 Y

EAR - VOL UNTARY

5 YEAR - CODE DRIV

EN

N-VALVE : NOT AN INSPECTED VALVE

EVERY SEGMENT OF NEW PIPE ADDED TO OUR SYSTEM MUST BE PRESSURE-TESTED PER THIS STANDARD, AND ALL LEAKS SHALL BE LOCATED ANDELIMINATED BEFORE THE LINE IS PUT INTO SERVICE. THIS ALSO APPLIES TO EXISTING PIPELINES THAT HAVE BEEN RELOCATED.

ALL TIE-IN CONNECTIONS THAT CANNOT BE PRESSURE TESTED SHALL BE LEAK TESTED AT FULL OPERATING PRESSURE ONCE THE LINE IS PURGEDAND PRESSURIZED WITH GAS.

COMPONENTS OTHER THAN PIPE WHICH ARE ADDED TO THE SYSTEM OR INSTALLED AS REPLACEMENT PARTS MAY BE LEAK TESTED AT FULLOPERATING PRESSURE ONCE THE MAIN IS PURGED AND PRESSURIZED WITH GAS, SO LONG AS THESE COMPONENTS MEET THE REQUIREMENTSOF 4 CSR 240-40.030 SECTION (10)(B)5.

ALL SEGMENTS OF MAIN THAT ARE TAKEN OUT OF SERVICE BUT NOT REQUIRED TO BE PRESSURE TESTED SHALL BE LEAK SURVEYED, ALONG WITHANY AFFECTED SERVICES, AFTER THE MAIN IS PURGED AND PRESSURIZED WITH GAS, TYPICALLY WITHIN 24 HOURS.

ALL DATA RELATED TO THESE TESTS SUCH AS DATE, PRESSURE, TIME DURATION, TEST MEDIA AND PERSON PERFORMING THE TEST BYMEASURING THESE CRITERIA SHALL BE RECORDED ON THE PROJECT AS-BUILT, INCLUDING FAILURES AND RE-TESTS. THIS SHALL INCLUDE ADESCRIPTION OF THE PORTION OF LINE BEING TESTED IF THIS IS NOT CLEAR ON THE AS-BUILT.

ONLY PRESSURE CHARTS OR GAUGES WITH SCALES WHICH ALLOW THE TESTER TO DETECT A 5 PSI PRESSURE DROP SHALL BE USED.

TRANSMISSION MAINS, FEEDER MAINS, REGULATOR STATION AND METER STATIONPIPING, AND FARM TAPS

EACH JOB SHALL BE ANALYZED BY THE DESIGN ENGINEER AND TEST CRITERIA IN ACCORDANCE WITH 4 CSR 240-40.030 SECTION (10) SHALL BESPECIFIED ON THE DRAWING. REGULATOR STATION AND METER STATION PIPING SHALL BE DESIGNED AND TESTED TO FULL INLET PRESSURE, UPTO THE OUTLET VALVE.

A DESIGN ENGINEER SHALL BE CONSULTED PRIOR TO ANY REPAIR WORK BEING PERFORMED TO DETERMINE TEST REQUIREMENTS ASSOCIATEDWITH THE WORK.

DISTRIBUTION MAINS AND SERVICES

PRESSURE TEST REQUIREMENTS FOR MAINS TO OPERATE AT OR BELOW 60 PSIG

ALL NEW SECTIONS OF PIPE SHALL BE TESTED WITH AIR AT A MINIMUM OF 90 PSIG FOR A MINIMUM OF ONE HOUR.

ALL NEW PLASTIC AND STEEL PIPE INSTALLED FOR REPAIR PURPOSES WHERE THE PIPE LENGTH INSTALLED IS 50 FT. OR LESS SHALL BE PRESSURETESTED WITH AIR AT THE JOB SITE TO A MINIMUM OF 90 PSIG FOR A MINIMUM OF 15 MINUTES.

ALL NEW AND REPLACED PLASTIC AND STEEL GAS MAINS SHALL BE LEAK SURVEYED WITHIN 30 DAYS OF BEING PLACED IN SERVICE.

A DESIGN ENGINEER SHALL BE CONSULTED REGARDING ANY EXCEPTIONS TO ABOVE-LISTED TEST PRESSURES AND TIMES. NOTE THAT 6" SDR 21PIPE (THIN WALL) HAS AN UPPER TEST PRESSURE LIMIT OF 40 PSIG.

THE TEST PRESSURE SHALL NOT EXCEED 238 PSIG ON ANY SEGMENT OF PLASTIC PIPE.

PRESSURE TEST REQUIREMENTS FOR SERVICE LINES OPERATING AT 60 PSIG OR BELOW

ALL NEW SERVICES LESS THAN 2 INCHES IN DIAMETER SHALL BE TESTED WITH AIR AT A MINIMUM OF 90 PSIG FOR A MINIMUM OF 15 MINUTESFOR SERVICES 150 FEET OR SHORTER. SERVICES LONGER THAN 150 FEET SHALL BE TESTED AN ADDITIONAL 5 MINUTES PER EACH 50 FEET OFADDITIONAL LENGTH. NO SERVICE LINE SHALL BE TESTED FOR A LONGER DURATION THAN THE PRESSURE TEST FOR THE MAIN TO WHICH ITCONNECTS.

ALL NEW SERVICES 2 INCHES AND LARGER IN DIAMETER SHALL BE TESTED WITH AIR AT A MINIMUM OF 90 PSIG FOR A MINIMUM OF 30 MINUTES.

TEST DURATIONS LONGER THAN ABOVE MAY BE REQUIRED AT THE DISCRETION OF THE ENGINEER IF CIRCUMSTANCES WARRANT.

ANY GAS SERVICE DISCONNECTED FROM THE MAIN SHALL BE TESTED AS DESCRIBED ABOVE FROM REPAIR POINT TO RISER PER THEREQUIREMENTS PRESCRIBED ABOVE, PRIOR TO REINSTATEMENT OF SERVICE. SERVICE SHALL BE LEAK SURVEYED FROM THE POINT OF REPAIRBACK TO THE MAIN.

THE TEST PRESSURE SHALL NOT EXCEED 238 PSIG ON ANY SEGMENT OF PLASTIC PIPE.

600 Series

Erosion and Sediment Control

Sediment and Erosion Control Standards 

General

All construction work performed in the United States, no matter how large or how small, must be performed in a way that minimizes the amount of soil, sediment and other pollutants introduced into local storm water sewers and waterways. This is required by the Environmental Protection Agency’s Clean Water Act. Local government agencies, such as the City of Springfield, and Greene County, have jurisdiction on enforcing these regulations, as does the Missouri Department of Natural Resources and the Army Corps of Engineers. All work performed by or for City Utilities of Springfield must comply with these regulations.

There are many tools and construction methods used to prevent pollution caused by construction runoff, which are commonly known as Best Management Practices, or BMP’s. The Construction Standards included in this Section are intended to provide instruction on how to use the most common BMP’s currently available. However, it is the employee or contractor’s responsibility to ensure these BMP’s are effective. If the BMP’s in place are not effectively preventing soil runoff pollution, you are responsible for developing a plan that is effective. The City of Springfield has developed a more comprehensive booklet of BMP’s, which should be referenced if the common methods described in these Standards are not entirely effective on your project.

Large construction projects, effecting more than 1 acre, require a Storm Water Pollution Prevention Plan , or SWPPP. This is required to obtain a land disturbance permit from the City or County. Engineers and Designers are encouraged to incorporate these Standards as part of their SWPPP. Similarly, on smaller construction projects effecting less than 1 acre of land, these same BMP’s must be utilized to prevent erosion and sediment pollution to the storm water sewers and waterways in the area.

Erosion control measures will be both temporary and permanent in nature. Temporary controls will include such items as compost filter socks, silt fencing, mulching, and ditch checks. Permanent controls will consist of rip-rap placement and reestablishing permanent cover (asphalt, gravel, vegetation). It should be noted that the BMPs standards should be used for the appropriate situations as determined by the project engineer on permitted projects, or by the personnel overseeing the construction activities for non-permitted projects. BMPs installed shall be maintained and monitored throughout construction and until ground cover has been reestablished. Stormwater runoff from or over disturbed areas consists of both sheet flow and concentrated flow. A great deal of storm water runoff will be in the form of sheet flow, therefore, many of the erosion control practices will be employed to control erosion of this type. Concentrated flow may occur within small intermittent drainage paths located along the right-of-ways or along drainage ditches parallel to roadways.  

Natural vegetation can act as an effective filter media to remove silt from surface runoff. The use of natural vegetation is the most cost effective means of sediment control and generally results in the least overall disturbance to the land. This technique should be applied wherever appropriate given site conditions. Sediment barriers will be required in areas where natural vegetation alone is inadequate to minimize sediment transport from the area of disturbance.. Throughout the course construction activity, roadways, parking lots and other hard surfaces should be cleaned of spilled or tracked soil and gravel on at least a daily basis. Cleaning will consist of scraping with backhoe bucket followed by sweeping. It is the responsibility of the construction supervisor to determine if the services of the City street sweeper are required to clean roadways.

All disturbed areas should be restored as soon as practicable to minimize erosion and sediment transport. All aspects of the construction should proceed to completion in an efficient and timely fashion. This will also be of economic benefit to the City Utilities. Planning and Selection of BMPs Proper planning will help to identify potential erosion problems before they occur. The project engineer and/or construction supervision shall be responsible for surveying the entire project site prior to work commencing in order to select the appropriate BMPs given site conditions.. The phasing of the work shall be considered in this planning phase to ensure BMP’s are installed at the appropriate time and locations corresponding with the construction activity. Some key items to consider while planning the erosion and sediment controls for the project are as follows:

Asses direction and grade of all slopes to evaluate the natural drainage of the site Identify areas where sheet flow or concentrated flow will occur Note location, type and number of storm water inlets Recognize all streams, creeks, dry-creeks, rivers, ponds, and lakes near the site Note previously eroded areas, steep slopes, or bare areas that will be susceptible to erosion Select appropriate measures that will minimize sediment from leaving the jobsite or reaching the

watershed system. Revaluate measures periodically and maintain them to ensure they are functioning as expected

Installation of BMPs Utilizing the BMP standards in this section, construct the BMPs necessary to minimize erosion for the utility construction project. The materials to be used in constructing BMP’s are available from City Utilities storeroom (see appendix A), or through a blanket contract with Eroco 417-831-6030 (see appendix B). Materials not on hand may also be purchased from local vendors as necessary. Maintaining BMPs Inspecting and maintaining the construction site and the BMPs installed are vital to the performance of all erosion and sediment control measures. If a particular BMP is not functioning as desired it is the responsibility of construction supervision to make necessary changes. BMPs such as curb inlet protection, silt fences, etc. will need sediment cleaned periodically from them to ensure they continue to function as they should. Accumulated silt will be removed when it reaches a depth of ½ the height of silt socks or curb inlet protection. Accumulated silt will be removed from behind silt fences when it accumulates to a depth of six inches. The silt will be removed and disposed of on the job site in a manner that will not contribute to additional siltation. After rain falls of ½” or greater, the construction site should be inspected to ensure BMP’s functioned properly and to determine if additional sediment or erosion control practices are needed. When soil disturbing activities cease in an area for more than 14 days, the disturbed areas shall be protected from erosion by stabilizing the area with mulch, or other similarly effective erosion control BMPs. If the slope of the area is greater than 3:1 the disturbed areas shall be protected from erosion by stabilizing the area with mulch or other similarly effective erosion control BMPs if activities cease from more than seven days. Removal of BMPs Temporary BMPs shall be removed from the construction site once non-erodible permanent cover has been installed and/or established. This will typically be through seeding, mulching, sodding, paving, etc.