NDDOT Bridge Inspection Manual

January 2020

Table of Contents APPENDICES ......................................................................................................................................5

TABLE OF FIGURES .............................................................................................................................5

ABBREVIATIONS .................................................................................................................................6

1.1 GENERAL ................................................................................................................................1

Federal Regulations ................................................................................................................... 1

National Publications ................................................................................................................ 1

NDDOT Requirements ............................................................................................................... 1

Program Organization, Qualifications, and Responsibilities ..................................................... 2

1.1.4.1 Bridge Management Engineer .............................................................................................. 2

1.1.4.2 Bridge Inspection Engineer ................................................................................................... 2

1.1.4.3 Senior Bridge Inspector ......................................................................................................... 3

1.1.4.4 Assistant Bridge Inspector .................................................................................................... 3

1.1.4.5 Snooper Inspection Vehicle Driver ........................................................................................ 4

1.1.4.6 Consultants ........................................................................................................................... 4

1.2 CERTIFICATION, SAFETY TRAINING, AND EQUIPMENT ..............................................................6

Certifications ............................................................................................................................. 6

1.2.1.1 Bridge Inspection Refresher Training .................................................................................... 6

1.2.1.2 Fracture Critical Inspection ................................................................................................... 6

1.2.1.3 Underwater Inspection ......................................................................................................... 6

1.2.1.4 Non-Destructive Testing (NDT) ............................................................................................. 6

1.2.1.5 Operation of Unmanned Aircraft System ............................................................................. 6

1.2.1.6 NDDOT Snooper Inspection Vehicle Operation .................................................................... 6

Equipment ................................................................................................................................. 7

1.2.2.1 Personal Protective Equipment ............................................................................................ 7

1.2.2.2 Bridge Inspection Equipment List ......................................................................................... 7

Traffic Control ........................................................................................................................... 7

1.3 INSPECTION REQUIREMENTS BY SYSTEM .................................................................................8

General ...................................................................................................................................... 8

1.3.1.1 Border Bridges....................................................................................................................... 9

1.4 STRUCTURE INFORMATION ................................................................................................... 10

Structure Number ................................................................................................................... 10

1.4.1.1 State Structure .................................................................................................................... 10

1.4.1.2 County Structure ................................................................................................................. 11

1.4.1.3 City/Municipal Structure ..................................................................................................... 12

1.4.1.4 Removed or Replaced Structures ....................................................................................... 13

1.5 INSPECTION TYPE AND FREQUENCY ....................................................................................... 14

General .................................................................................................................................... 14

Inspection Type ....................................................................................................................... 14

1.5.2.1 Initial Inspection .................................................................................................................. 14

1.5.2.2 Routine Inspection .............................................................................................................. 14

1.5.2.3 In-Depth Inspection ............................................................................................................ 14

1.5.2.4 Fracture Critical Member Inspection .................................................................................. 14

1.5.2.5 Underwater Inspection ....................................................................................................... 14

1.5.2.6 Special Inspection ............................................................................................................... 14

1.5.2.7 Damage Inspection ............................................................................................................. 15

Inspection Interval Schedule and Table .................................................................................. 15

1.5.3.1 Inspection Interval Table ..................................................................................................... 15

1.5.3.2 Inventory – Timely Updating of Data .................................................................................. 15

1.5.3.3 Delayed Inspections ............................................................................................................ 16

1.6 INSPECTION PROCEDURES ..................................................................................................... 17

Inspection Application ............................................................................................................ 17

Inspection Report .................................................................................................................... 17

Coding Bridge Inspection Data ................................................................................................ 17

General Inspection Procedures ............................................................................................... 17

Alert Code 1, 2 & 3 .................................................................................................................. 18

1.6.5.1 Alert Code 1: Minor ............................................................................................................. 18

1.6.5.2 Alert Code 2: Major ............................................................................................................. 18

1.6.5.3 Alert Code 3: Immediate Attention .................................................................................... 19

Critical Finding ......................................................................................................................... 19

Fracture Critical Inspections ................................................................................................... 20

Scour Critical Bridges/Scour Assessment ................................................................................ 20

Agency Developed Elements ................................................................................................... 20

Other Inspection Procedures .................................................................................................. 20

1.6.10.1 Steel Culvert Measurements........................................................................................... 20

1.6.10.2 Vertical Clearances .......................................................................................................... 20

1.6.10.3 Delamination Surveys – State Structures Only ............................................................... 20

1.6.10.4 Channel Profile ................................................................................................................ 20

1.6.10.5 Approach Guardrail and End Treatments ....................................................................... 21

1.6.10.6 Maintenance Suggested Items ........................................................................................ 21

Closed Structures .................................................................................................................... 21

Railroad Right of Way ............................................................................................................. 21

1.7 QUALITY CONTROL/QUALITY ASSURANCE ............................................................................. 21

NDDOT Staff Performed Inspections ...................................................................................... 21

Consultant Performed Inspections ......................................................................................... 21

APPENDICES Appendix A NDDOT Inspection Guidance

Appendix B SPP Measurement SFN Form

Appendix C Vertical Clearance SFN Forms

Appendix D Channel Profile SFN Form

Appended by Reference: - NDDOT Bridge Inspectors Guide for Fracture Critical Bridges and Bridges with Special Features - NDDOT Inspection Vehicle Policy Manual

TABLE OF FIGURES Figure 1: NDDOT Inspection Requirements .................................................................................................. 8

Figure 2: Example of Multiple Pipe Inspection Requirements...................................................................... 8

Figure 3: Example of County and Urban Bridge Inspection Requirements .................................................. 9

Figure 4: Example of County and Urban RCB Inspection Requirements ...................................................... 9

Figure 5: Border Bridges ............................................................................................................................... 9

Figure 6: Example State Structure Numbers ............................................................................................... 10

Figure 7: State Structure Number Coding ................................................................................................... 10

Figure 8: Example County Structure Number ............................................................................................. 11

Figure 9: County Bridge Numbering Scheme .............................................................................................. 11

Figure 10: North Dakota Counties .............................................................................................................. 12

Figure 11: Example City/Municipal Structure Number ............................................................................... 12

Figure 12: City Designated Code ................................................................................................................. 12

Figure 13: Inspection Interval Table ........................................................................................................... 15

ABBREVIATIONS The following is a list of abbreviations used in all Chapters of the Bridge Management Manual:

AASHTO American Association of State Highway and Transportation Officials

ADT Average Daily Traffic

BrM AASHTOWare Bridge Management Software

CFR Code of Federal Regulations

FC Fracture Critical

FCM Fracture Critical Member

FHWA Federal Highway Administration

GPR Ground Penetrating Radar

GPS Global Positioning System

LRFD Load Resistance Factor Design

MBE AASHTO Manual for Bridge Evaluation

MT Magnetic Particle Testing

MUTCD Manual of Uniform Traffic Control Devices

NBI National Bridge Inventory

NBIS National Bridge Inspection Standards

NCHRP National Cooperative Highway Research Program

NDDOT North Dakota Department of Transportation

NDE Non-destructive Evaluation

NDT Non-destructive Testing

NHI National Highway Institute

NHS National Highway System

PCA Plan of Corrective Action

POA Plan of Action

PPE Personal Protection Equipment

PT Liquid Penetrant Testing

SI&A Structure Inventory and Appraisal

UW Underwater

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1.1 GENERAL

Federal Regulations The Code of Federal Regulations (CFR) requires that State Departments of Transportation develop and monitor a bridge inspection program. The inspection program must meet or exceed the requirements of the National Bridge Inspection Standards (NBIS) 23 CFR §650. The CFR requires the inspection of all structures classified as bridges, as defined by NBIS 23 CFR §650 Subpart C. The CFR also requires the development of statewide inspection policies and procedures, the development of QC/QA procedures, and the preparation and maintenance of a bridge file. This chapter assists bridge inspectors in the interpretation and implementation of the procedures and practices within the bridge inspection programs.

National Publications FHWA and AASHTO have published several publications to implement the NBIS. Use the following additional publications in conjunction with this chapter:

For Inspection Procedures: • FHWA Bridge Inspector’s Reference Manual • AASHTO Manual for Bridge Evaluation

For NBI Coding guidance: • FHWA Recording and Coding Guide for the Structure Inventory and Appraisal of the Nation’s

Bridges

For Element Inspection guidance: • AASHTO Manual for Bridge Element Inspection

For Fracture Critical inspections: • FHWA Inspection of Fracture Critical Bridge Members (Report No. FHWA-IP-86-26)

For Underwater inspections: • FHWA Underwater Bridge Inspection Manual

For NBIS Oversight Program: • FHWA Metrics for the Oversight of the National Bridge Inspection Program

NDDOT Requirements

North Dakota Department of Transportation has additional requirements governing the inspection of structures within the State, which are found throughout the NDDOT Bridge Inspection Manual. In the event of conflicting information or requirements between the NDDOT Inspection Manual and the NBIS, the most restrictive requirement will govern. Use the following additional guidance documents in conjunction with this manual:

For NDDOT Structure Information: • North Dakota Department of Transportation Bridge Listing

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For NDDOT Fracture Critical inspections: • NDDOT Bridge Inspectors Guide for Fracture Critical Bridges and Bridges with Special Features

Program Organization, Qualifications, and Responsibilities

Bridge Management is responsible for the bridge inspection program in compliance with NBIS 23 CFR §650 Subpart C. Bridge Management is responsible for inspection policies and procedures, reporting, quality assurance and the preparation and maintenance of the bridge file. All responsibilities may vary as assigned. 1.1.4.1 Bridge Management Engineer

1.1.4.1.1 Qualifications • Serve as the Bridge Inspection Program Manager for the implementation of the NBIS; Program

Manager as defined by NBIS 23 CFR §650 Subpart C • Be a registered professional engineer (PE); or have a minimum of ten years of bridge inspection

experience • Successfully complete NHI Course No. 130055 or 130056 Safety Inspection of In-Service Bridges • Complete a cumulative total of 18 hours of FHWA approved bridge inspection refresher training

over each 60 month period

1.1.4.1.2 Responsibilities • Provide management of the inspection teams • Develop, monitor and maintain training programs for state and consultant inspectors • Maintain documentation supporting the satisfaction of personnel qualifications, certifications,

and training 1.1.4.2 Bridge Inspection Engineer

1.1.4.2.1 Qualifications Bridge Inspection Engineer must meet one of the two qualifications listed below:

• Be a registered PE with a Bachelor of Science in Civil Engineering, Construction Management, or Construction Engineering and successfully complete NHI Course No. 130055 or 130056 Safety Inspection of In-Service Bridges

OR

• Bridge Inspection Engineer without a PE with a Bachelor of Science in Civil Engineering, Construction Management, or Construction Engineering and successfully complete NHI Course No. 130055 Safety Inspection of In-Service Bridges

1.1.4.2.2 Responsibilities • Support the Bridge Management Engineer in fulfilling the requirements of the bridge inspection

programs • Plan, schedule and help prepare information for the field inspection of bridges • Perform QA reviews and approves inspection reports • Maintain the bridge inspection schedule and schedule changes • Coordinate with railroad companies for internal NDDOT bridge inspections over/under railroads

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1.1.4.3 Senior Bridge Inspector 1.1.4.3.1 Qualifications Senior Bridge Inspectors must meet one of the three qualifications listed below:

• Be a registered PE with a Bachelor of Science in Civil Engineering, Construction Management, Construction Engineering, or related field, have two years of bridge inspection experience, and have successfully completed NHI Course No. 130055 or 130056 Safety Inspection of In-Service Bridges

OR

• Senior Bridge Inspectors without a PE with a Bachelor of Science in Civil Engineering, Construction Management, Construction Engineering, or related field must have four years of bridge inspection experience and have successfully completed NHI Course No. 130055 Safety Inspection of In-Service Bridges

OR

• Senior Bridge Inspectors with an Associate of Science in Civil Engineering Technology, Construction Management Technology, or related field must have eight years of bridge inspection experience and have successfully completed NHI Course No. 130055 Safety Inspection of In-Service Bridges

Senior Bridge Inspectors must be certified Bridge Inspection Team Leaders per 23 CFR §650.309(b) and at a minimum: • Successfully complete NHI Course No. 130078 Fracture Critical Inspection Techniques for Steel

Bridges within 12 months • Complete a cumulative total of 18 hours of FHWA approved bridge inspection refresher training

over each 60-month period • Trained in Inspection Vehicle (Snooper) operation (ASPEN)

1.1.4.3.2 Responsibilities • Supports the Bridge Inspection Engineer in fulfilling the requirements of the bridge

inspection program • Provides direction to the bridge inspection team • Plans, schedules and prepares information for the field inspection of bridges • Performs bridge inspections • Processes and signs bridge inspection reports • Performs QC reviews of bridge inspection reports • Ensures the general safety of the bridge site • Verifies that all safety procedures and the proper use of access equipment are followed • Maneuvers the Snooper for under bridge inspections

1.1.4.4 Assistant Bridge Inspector

1.1.4.4.1 Qualifications Assistant Bridge Inspectors must meet one of the three qualifications listed below:

• Be a registered PE with a Bachelor of Science in Civil Engineering, Construction Management, Construction Engineering, or related field and have successfully completed NHI Course No. 130055 or 130056 Safety Inspection of In-Service Bridges

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OR

• Assistant Bridge Inspectors without a PE with a Bachelor of Science in Civil Engineering, Construction Management, Construction Engineering, or related field must have two years of bridge inspection experience and have successfully completed NHI Course No. 130055 Safety Inspection of In-Service Bridges

OR

• Assistant Bridge Inspectors with an Associate of Science in Civil Engineering Technology, Construction Management Technology, or related field must have three years of bridge inspection experience and have successfully completed NHI Course No. 130055 Safety Inspection of In-Service Bridges

Assistant Bridge Inspectors must be certified Bridge Inspection Team Leaders per 23 CFR §650.309(b) and at a minimum: • Successfully complete NHI Course No. 130078 Fracture Critical Inspection Techniques for Steel

Bridges within 12 months • Complete a cumulative total of 18 hours of FHWA approved bridge inspection refresher training

over each 60-month period • Trained in Inspection Vehicle (Snooper) operation (ASPEN)

1.1.4.4.2 Responsibilities • Support the Senior Bridge Inspector in fulfilling the requirements of the bridge inspection

program • Plan, schedule and prepare information for the field inspection of bridges • Perform bridge inspections • Process bridge inspection reports • Perform QC reviews of bridge inspection reports • Follow the requirements for the general safety of the bridge site • Follow all safety procedures and procedures for the proper use of access equipment

1.1.4.5 Snooper Inspection Vehicle Driver

1.1.4.5.1 Qualifications • Hold a current CDL

1.1.4.5.2 Responsibilities • Drive the Snooper Inspection Vehicle • Is trained in the proper use and safe operation of the snooper inspection vehicle

1.1.4.6 Consultants Consultants may supplement NDDOT for bridge inspections. Team Leaders must meet 23 CFR §650.309(b) and must meet one of the four qualifications listed below:

• Be a registered PE

OR

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• Have a bachelors’ degree in engineering or engineering technology from a college or university accredited by or determined as substantially equivalent by the Accreditation Board for Engineering and Technology and

• Successfully passed the National Council of Examiners for Engineering and Surveying Fundamentals of Engineering examination and

• Have two years of bridge inspection experience

OR

• Have an associate degree in engineering or engineering technology from a college or university accredited by or determined as substantially equivalent by the Accreditation Board for Engineering and Technology and

• Have four years of bridge inspection experience

OR

• Have five years of bridge inspection experience

Team Leaders must have the following training: • Successful completion of FHWA approved comprehensive bridge inspection training. Inspectors

with a PE must have successfully completed NHI Course No. 130055 or 130056 Safety Inspection of In-Service Bridges. Inspectors without a PE must have successfully completed NHI Course No. 130055 Safety Inspection of In-Service Bridges and

• Completion of periodic bridge inspection refresher training according to State policy. This requires that Inspectors who have already successfully completed the NHI Course No. 130055 or 130056 but have not actively inspected Bridges in the last 5 years, will need to have completed NHI Course 130053 Bridge Inspection Refresher.

• Team Leaders inspecting Bridges with Fracture Critical Members must also have successful completion of NHI Course No. 130078 Fracture Critical Inspection Techniques for Steel Bridges.

1.1.4.6.1 Underwater Bridge Inspector

Underwater bridge inspections are performed under consultant contract. Underwater inspections must be conducted by or under the direct supervision of Bridge Inspection Team leaders and inspectors must have the following:

1.1.4.6.1.1 Qualifications • Have at least two years’ experience in Underwater bridge inspections and • Meets the diving qualifications required by Occupational Safety and Health Administration (OSHA)

regulations, Commercial Diving Operations – CFR 29, §1910 Subpart T and • Successfully complete NHI Course No. 130091 Underwater Bridge Inspection and • Possesses a current commercial diver certification card from ADCI

1.1.4.6.1.2 Responsibilities • Same as Assistant Bridge Inspector responsibilities

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1.2 CERTIFICATION, SAFETY TRAINING, AND EQUIPMENT

Certifications The NDDOT requires that bridge inspection staff receive, track, and maintain documentation of training as required by NBIS 23 CFR §650 and relevant NDDOT policies. Bridge Management maintains and performs yearly verification of qualifications for Bridge Inspection Team Leaders, which tracks bridge inspection personnel experience, certification, and training. 1.2.1.1 Bridge Inspection Refresher Training The NBIS requires comprehensive bridge inspection and refresher training for Program Managers and Team Leaders. The intent of this training is to improve the quality of bridge inspections, introduce new inspection equipment and techniques, and maintain the consistency and reliability throughout the state-wide network of the bridge safety inspection program. Program Managers and Team Leaders must complete a cumulative total of 18 hours of FHWA approved bridge inspection refresher training over each 60 month period. Options for bridge inspection refresher training:

1. NDDOT Bridge Inspection Refresher Training 2. NHI Course Bridge Inspection Refresher Training 3. Alternative bridge inspection refresher training, at the discretion of the Program Manager

1.2.1.2 Fracture Critical Inspection Team Leaders inspecting bridges with Fracture Critical Members must have successful completion of NHI Course No. 130078 Fracture Critical Inspection Techniques for Steel Bridges. 1.2.1.3 Underwater Inspection See Section 1.1.4.6.1 Underwater Bridge Inspector for necessary Underwater Inspection certification. 1.2.1.4 Non-Destructive Testing (NDT) NDT is often used during the inspection of steel structures to determine the internal integrity of structural elements. To ensure proper application of the testing procedures and interpretation of results, inspection personnel are required to have training in the method of NDT used. 1.2.1.5 Operation of Unmanned Aircraft System All Federal Aviation Administration rules and regulations need to be met and followed in order to operate an unmanned aircraft system for inspections. Consultants must have liability insurance prior to any UAS operations for NDDOT bridge inspections. 1.2.1.6 NDDOT Snooper Inspection Vehicle Operation The driver of the Snooper must have a current CDL. To operate the Snooper bucket, the individual must be trained in Aspen Aerials Inspection Vehicle (Snooper) operation training. The driver and the operator should be familiar with the NDDOT Inspection Vehicle Policy Manual.

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Equipment 1.2.2.1 Personal Protective Equipment All inspectors must carry and use personal protective equipment. All inspections on active construction sites must meet the safety requirements of the construction site that exceed inspection safety requirements. 1.2.2.2 Bridge Inspection Equipment List Inspectors should review Section 2.4 “Inspection Equipment” of the FHWA BIRM before an inspection assignment for thorough coverage of recommended requirements. The following is a list of equipment commonly used for bridge inspections:

1. 16 ft. to 20 ft. extension ladder 18. Pocket knife 2. Graduated telescoping sounding rod 19. Wire brush 3. Tape measure 20. Ice pick 4. Chipping hammer (geologist type) 21. Magnifying glass 5. Putty knife 22. Chest waders 6. Inspection mirror on extension arm 23. Thermometer 7. Scriber 24. Infrared thermometer 8. Vernier calipers 25. Life vests (if needed) 9. Plumb bob and line 26. Binoculars 10. Carpenter's level 27. Boat with oars or kayak (if needed) 11. Smart Level 28. iPad 12. 100' tape 29. Infrared camera 13. Camera 30. Crack card/gage 14. Screwdriver 31. Drone 15. Plier 32. Rotary percussion 16. Protractor 33. Chaining tool 17. Flashlight or Miner's helmet with light

Traffic Control

The Bridge Management Engineer or Bridge Inspection Engineer coordinates with the District Maintenance Superintendent to arrange temporary traffic control for the upcoming bridge inspection(s). Bridge Inspection Team Leaders must alert the Bridge Management Engineer or Bridge Inspection Engineer at least five (5) weeks before traffic control measures are needed, so that they can alert the District Maintenance Superintendent at least four (4) weeks before traffic control measures are needed. All necessary traffic control must be in place prior to inspection. For consultant performed bridge inspections, the consultant is responsible for the traffic control and all necessary traffic control must be in place prior to inspection.

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1.3 INSPECTION REQUIREMENTS BY SYSTEM

General The NBIS requires proper safety inspection and evaluation of all highway bridges located on all public roads. FHWA has specific reporting requirements based on the NBIS. In addition to FHWA requirements, NDDOT has specific state inspection requirements.

Figure 1: NDDOT Inspection Requirements

Multiple Pipe are considered one structure when the clear distance between openings is less than half the smaller contiguous opening. The length of multiple pipe installations is measured parallel to the roadway centerline and between inside faces of the exterior pipe.

Figure 2: Example of Multiple Pipe Inspection Requirements

System Structure Type Inspection Requirements

BRIDGES All Bridges

REINFORCED BOX CULVERT All Boxes

MULTIPLE PIPE Total Span Length > 20'

METAL PIPE CULVERTS Nominal Diameter ≥ 8'

BRIDGES Total Span Length > 20'

REINFORCED BOX CULVERT Total Span Length > 20'

MULTIPLE PIPE Total Span Length > 20'

State Highway

LPA OwnedState Park or ForestLocal Park or Forest

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Non-State Highway Agency System

Bridges with total span length greater than 20 feet are measured along the centerline from the inside of abutments including piers.

Figure 3: Example of County and Urban Bridge Inspection Requirements

Reinforced Box Culverts with total span length greater than 20 feet are measured parallel to the roadway centerline and between inside faces of exterior walls.

Figure 4: Example of County and Urban RCB Inspection Requirements

1.3.1.1 Border Bridges North Dakota has border bridges between Minnesota and South Dakota. Maintenance and inspections are covered by agreements between the states. Below is a list of border bridges in ND:

Figure 5: Border Bridges

South Dakota

0002-358.090 0094-352.453 R 39-126-04.0 FRGO03 11-115-24.10002-911.409 0094-352.457 L 39-127-10.0 FRGO09 L 11-116-24.00005-335.813 0200-415.724 39-127-13.0 FRGO09 R 11-127-24.00010-940.666 0210-002.937 39-130-18.0 FRGO12 11-140-24.00011-182.459 09-142-04.0 39-134-33.0 FRGO29 41-116-24.00013-391.615 09-142-10.0 39-135-37.0 FRGO30 41-136-24.10017-140.372 09-142-18.0 49-129-05.0 FRGO310054-009.958 09-144-35.0 49-129-10.0 GF020059-001.010 09-144-40.0 49-130-15.0

0066-138.720 18-146-30.0 49-131-28.0

Border Bridges

Minnesota

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1.4 STRUCTURE INFORMATION

Structure Number The structure number, also known as bridge ID, is unique for each structure within the state. Any structure or structures with a closed median should be considered as one structure. The Bridge Engineer will assign or approve all newly assigned bridge numbers. 1.4.1.1 State Structure For a state structure, the first four numbers are the highway number (this may include leading zeros). The next six numbers are the reference point. See the following for example state structure numbers:

Figure 6: Example State Structure Numbers

Special coding following the structure number help identify the location of the structure and indicate the location of a structure not on the mainline and are as follows:

Figure 7: State Structure Number Coding

Structure Number Facility

0002-233.427 state bridge

0094-090.110 state bridge

1806-085.052 state bridge

0094-290.803 Lstate bridge (Note: 2 spaces between the last number and L or R, N, S, or T)

0029-065.386 B state bridge (Note: 4 spaces between the last number and B)

0081-931.984 L Bstate bridge (Note: 2 spaces between last number and L (or R, N, S, or T) and 1 space between L (or R, etc.) and B

Code Item

L Left roadway or left side

R Right roadway or right side

N On right of way, but not on the mainline roadway

M In median

S Left service road

T Right service road

B Carries non-highway traffic

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1.4.1.2 County Structure The county bridge numbers are derived from a coordinate system which is unique to each county. These identifying numbers are made up of the two digit county number first, then a mile number read to the right (east) from the northwest corner of the county, then a mile number read down (south) from the northwest corner of the county. See the following for example county structure numbers:

Figure 8: Example County Structure Number

Figure 9: County Bridge Numbering Scheme

Structure Number Facility

01-103-23.0 county bridge

18-127-14.0 county bridge

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Figure 10: North Dakota Counties

1.4.1.3 City/Municipal Structure These structures lie within municipalities but may be owned and/or maintained by the city and/or the county. The identifying numbers are in the "Bridge Listing" and contain no hyphens and decimals. Structure number includes city designated code first, followed by the bridge number. Single digit bridge numbers must have one leading zero. See the following for example city/municipal structure numbers:

Figure 11: Example City/Municipal Structure Number

Figure 12: City Designated Code

CO. NO. COUNTY CO. NO. COUNTY CO. NO. COUNTY

01 Adams 19 Grant 37 Ransom 02 Barnes 20 Griggs 38 Renvil le 03 Benson 21 Hettinger 39 Richland 04 Bill ings 22 Kidder 40 Rolette 05 Bottineau 23 LaMoure 41 Sargent 06 Bowman 24 Logan 42 Sheridan 07 Burke 25 McHenry 43 Sioux 08 Burleigh 26 McIntosh 44 Slope 09 Cass 27 McKenzie 45 Stark 10 Cavalier 28 McLean 46 Steele 11 Dickey 29 Mercer 47 Stutsman 12 Divide 30 Morton 48 Towner 13 Dunn 31 Mountrail 49 Trail l 14 Eddy 32 Nelson 50 Walsh 15 Emmons 33 Oliver 51 Ward 16 Foster 34 Pembina 52 Wells 17 Golden Valley 35 Pierce 53 Will iams 18 Grand Forks 36 Ramsey

North Dakota Counties

Structure Number Facility

FRGO31 city/municipal bridge

MNOT01 city/municipal bridge

Code City

BISM BismarckDKSN DickinsonFRGO FargoGF Grand ForksGRAF GraftonJMTN JamestownMAN MandanMNOT MinotVC Valley CityWF West Fargo

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1.4.1.4 Removed or Replaced Structures When a structure is replaced with an NBI length structure, the old structure number is coded beginning with an ‘R’ and all dashes and periods are removed from the structure number. When a structure is removed or replaced with a structure that does not meet NBIS length, the old structure number is coded beginning with an ‘X’ and all dashes and periods are removed from the structure number. These structures are coded such that they no longer show up in the active bridge inventory.

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1.5 INSPECTION TYPE AND FREQUENCY

General A NDDOT certified Bridge Inspection Team Leader must always be present at the bridge site during a bridge inspection.

Inspection Type For further guidance on inspection type and interval, see Chapter 4 in the MBE. 1.5.2.1 Initial Inspection An initial inspection is the first inspection of a new bridge or an existing bridge after a major rehabilitation such as a deck replacement, superstructure replacement, substructure replacement, or widening. 1.5.2.2 Routine Inspection Routine inspections are regularly scheduled inspections consisting of observations for all elements of the bridge and measurements needed to determine the physical and functional condition of the bridge, to identify any changes from initial inspection or previously recorded conditions, and to ensure that the structure continues to satisfy present safety requirements. 1.5.2.3 In-Depth Inspection An in-depth inspection is a close-up, detailed inspection of one or more bridge components located above or below water, using visual or nondestructive techniques as required to identify any deficiencies not readily detectable using routine inspection procedures.

1.5.2.4 Fracture Critical Member Inspection A fracture-critical member (FCM) is a steel member in tension, or with tension elements, whose failure would probably cause a portion of or the entire bridge to collapse. Document what types of steel bridge components are considered FCMs. Clearly identify FCM components requiring an FCM inspection in the inspection file. Perform a hands-on inspection (inspection within arm’s length of the component using visual or nondestructive techniques as required) of all FCMs and record equipment/procedure used. 1.5.2.5 Underwater Inspection An underwater inspection is an inspection of the underwater portion of a bridge substructure and surrounding channel which cannot be inspected visually at low water by wading or probing, generally requiring diving or other appropriate techniques. 1.5.2.6 Special Inspection A special inspection is an inspection scheduled at the discretion of the NDDOT Bridge Division. It is used to monitor a particular known or suspected deficiency, such as cracks in steel, settlement, or scour. It may also be used to monitor special details or unusual characteristics of a bridge that do not necessarily have defects, such as ultrasonic testing of pins. A special inspection is not required to be performed by a qualified inspection team leader; however, provide a person qualified to perform the specific inspection (for example, qualified nondestructive testing inspector to perform ultrasonic testing of pins).

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1.5.2.7 Damage Inspection A damage inspection is an unscheduled inspection to assess structural damage resulting from environmental events (such as earthquake, flooding, or landslide) or human actions (such as truck impacts or fire).

Inspection Interval Schedule and Table Inspection intervals vary depending on the type of inspection and condition of the bridge. However, there are minimum intervals required by the NBIS for several inspection types. For further guidance on inspection interval, see Chapter 4 in the MBE and the NBIS. 1.5.3.1 Inspection Interval Table

Figure 13: Inspection Interval Table

1.5.3.2 Inventory – Timely Updating of Data Inspection data must be entered into the State’s inventory within 90 days of the new inspection date for State owned structures and within 180 days of the new inspection date for all other structures not owned by the State for the following events:

• Routine, in-depth, fracture critical member, underwater, damage, and special inspections • Existing structure modifications that alter previously recorded data and for new structures • Load restrictions or closure status

Inspection Type Inspection Interval Inspection Criteria

InitialInitial inspection upon completion of a: 1. New Structure or 2. Major Structure Rehabilitation

Complete the Initial Inspection after construction is completed and prior to bridge being opened to traffic.

≤ 12 months Structures with an Alert Code 3 and/or Critical Finding

24 months

48 monthsStructure must meet specific written criteria approved by FHWA to be inspected on a 48 month interval.

In-Depth No defined inspection interval.Inspections scheduled at the discretion of the NDDOT Bridge Division.

Fracture Critical 24 monthsFracture Critical Inspection to be performed during the Routine Inspection.

Underwater 60 monthsUnderwater Inspection can be performed during the Routine Inspection. May be required at more frequent intervals if conditions warrant.

Special

No defined inspection interval.Complete a Special Inspection:1. Upon completion of repair of an Alert Code 3 or Critical Finding2. To monitor special structure details; e.g. testing of pins, etc.

Inspections scheduled at the discretion of the NDDOT Bridge Division.

Damage Unscheduled event-driven inspection.Inspections scheduled at the discretion of the NDDOT Bridge Division.

Routine

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1.5.3.3 Delayed Inspections At times, unusual weather or other conditions may prevent access to part or all of a bridge necessitating the inspection to be delayed until the bridge can be fully accessed. Under these circumstances, FHWA has a process whereby the NDDOT can request a delayed inspection. If proper supporting data is provided to FHWA, prior to the inspection being delinquent, and FHWA deems the circumstances warrant a delay to the inspection schedule, they may grant a delay such that the DOT will still be fully compliant given that delayed inspections are completed as soon as conditions allow. If the inspector believes that a delay is necessary, contact the Bridge Management Engineer and follow the procedure below:

1. Provide the bridge ID(s), inspection due date(s), and reason(s) for the delay. 2. Provide at least one current supporting photo of the bridge or circumstance justifying the delay

request. a. If you have too many photos to email, please label them with Bridge ID and put them in

the Transfer drive folder N:\Transfer\Bridge Inspection\_Delayed Inspection Photos or use the MFT site for consultants.

3. Complete as much of the inspection as possible. a. Provide updated NBI ratings for all accessible components b. Provide element ratings for all accessible elements c. Complete all other fields possible

4. For each element not accessible, add a note and date stating the reason it cannot be inspected. 5. In the notes section, detail the reason for the delay and include the date. Include and date a

statement of the conditions and extent of the inspection completed.

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1.6 INSPECTION PROCEDURES Bridge Management manages a variety of structure types and performs a variety of inspection types. This section presents the NDDOT’s procedures for specific structure and inspection types. The county or city shall be notified for LPA owned structure inspections one week prior to start of work in each area. The District shall be notified for State owned structure inspections one week prior to start of work in each area.

Inspection Application All inspectors must use the NDDOT inspection application to collect and submit inspection data.

Inspection Report All inspection reports need to follow the NDDOT inspection report template. All inspection reports need to be signed by the Team Leader present at the inspection and by the person performing the QC for the inspection. All inspection reports completed by a consultant need to be submitted to the NDDOT within 45 days after completion of the onsite inspection. Consultants will be provided an electronic template.

Coding Bridge Inspection Data FHWA and AASHTO provide rating systems to aid in the inspection of bridges. The two primary rating systems are the NBI rating system and the AASHTO Manual for Bridge Element Inspection. Both rating systems promote uniformity for rating the structural condition of a bridge. Each rating system relates the element distress found at the bridge to the effect on the structure strength and safety. The bridge inspector completes both NBI and element level assessment of each bridge inspected. The bridge inspector collects NBI data in accordance with the FHWA Recording and Coding Guide. An NBI inspection evaluates the deck, superstructure, substructure, channel, channel protection and culvert and waterway adequacy for each bridge. The AASHTO Manual for Bridge Element Inspection describes the element based rating system. An element level inspection identifies each bridge element separately, based on function and material type. The inspection evaluates each element by subdividing the total quantity into different condition states, or states of physical deterioration or damage.

General Inspection Procedures The following items need to be included with inspections:

1. Defects must be properly identified for all elements where any quantity is not in Condition State 1. Dated, descriptive notes must be included for each defect.

a. If there are multiple defects in the same area, code the worst defect and document in that defect note all other existing defect(s).

2. Dated photos including: a. Photos of all element defects, including specific location, description of defect, and

reference object for scale, as needed. b. Photos identifying all Alert Codes and Critical Findings. c. Photos of the structure profile taken in each direction. d. Photos of the structure from the approaching roadway each direction, including approach

guardrail and end treatments.

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e. Photo of the load limit sign if bridge is posted for load. f. Photos of channel upstream and downstream, identified as such and noting the direction

looking. g. Photos of pin assemblies, when applicable.

Alert Code 1, 2 & 3

"Special Alert Codes" are intended to highlight a situation indicating where further attention is required. Special attention situations range from elements indicating relatively minor cleanup to a condition indicating the structure should be closed pending repair. The least serious attention element is Alert Code 1. The most serious is Alert Code 3. The text entry in the text box for the appropriate code will describe the situation that is cause for alert. 1.6.5.1 Alert Code 1: Minor The existing condition does not seriously affect the load carrying capacity or the safety of the structure. The defects may be corrected by minimum effort by a small maintenance crew with limited equipment on a "Time Available Basis." Examples of Items to be Coded 1:

- Damaged railing. - Moderate spalling of concrete deck. - Moderate spalling of concrete substructure. - Moderate rust on steel stringers. - Secondary members or bracing members bent or damaged. - Cracks in concrete decks. - Cracks in concrete substructure. - Decayed or broken timber deck planks. - Settlement of abutment approach slabs or curbs. - Minor movement or settlement of substructures. - Minor decay or cracked timber piling and pile caps. - Minor scour (holes 1 to 3 feet deep).

1.6.5.2 Alert Code 2: Major The existing condition may have some effect on the load carrying capacity or the safety of the structure. The defects may be corrected by major efforts of a maintenance crew or by contract on a "Time Available Basis." Examples of Items to be Coded 2:

- Spalled concrete with exposed rebar. - Heavy rust on steel stringers with minor section loss. - Main load carrying members that are bent or damaged. - Major cracks in concrete (more than 2" separation). - Holes in timber deck planks. - Major movement or settlement of substructures. - Advanced decay or major cracks in timber piling and pile caps. - Minor cracks in timber stringers but still capable of carrying load. - Bent or damaged fracture critical members.

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- Major scour (holes 3 to 10 feet deep). 1.6.5.3 Alert Code 3: Immediate Attention The existing condition probably has a major effect on the load carrying capacity or the safety of the structure. Major rehabilitation or replacement may be necessary to correct the situation. An item with this code will prompt a reevaluation of the load carrying capacity of the structure. Examples of Items to be Coded 3:

- Heavily spalled concrete with rusty debonded rebar. - Rusty steel stringers with measurable section loss (give dimensions of

remaining sound steel). - Main load carrying members that are damaged or deteriorated to the point that

they no longer can carry their full share of the load. - Holes in timber deck plank that make the bridge difficult to cross. - Major movement or settlement of substructures that affect the stability of load

carrying member. - Advanced decay or damage to piling or substructure where section loss

exceeds 50% of original. - Major scour that undermines and threatens the stability of substructures. - Cracked or broken fracture critical members (besides coding this as a 3, it

should be called in to the Bridge Division immediately).

Critical Finding A Critical Finding is anything that would require the bridge to be immediately closed to all traffic, including but not limited to:

- Broken beams - Failed substructure - Excessive settlement - Excessive Scour - Critical Collision damage - Significant Ice or debris damage - Constant or recurring flooding

When an inspector identifies a Critical Finding, they should immediately contact the Bridge Division and explain the reason for their closure recommendation. Then Bridge Division will contact Local Government Division to share the findings with them. If appropriate, Local Government will contact the structure Owner and communicate the findings and recommendations. The entry for this item will be a brief description of the reason for the inspector’s closure recommendation and how the owner was contacted from the field. If the owner refuses to close or is not willing to immediately close the structure, Bridge Division will follow up with the Local Government Division (If a locally owned structure) to produce a letter clarifying to the owner as to why the bridge is recommended for closure and the steps that would allow for the re-opening of the structure. This letter will be sent to the owner within 3 business days (preferably sooner). When the owner has completed the reconstruction/repair to the structure, the owner will provide a

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thorough written response as to what repairs were completed that would remove it from the CF status and a request to the Local Government/Bridge Division outlining these modifications to remove the critical issue and request an inspection be completed prior to opening the structure. If the inspection team deems the repairs successful, the bridge may be re-opened and removed from the CF list. The new inspection shall be updated in the Bridge Management software to show the current bridge conditions including the removal of the Critical Finding.

Fracture Critical Inspections Team Leaders need to be within arm’s length of fracture critical members when completing the fracture critical inspection. All equipment and methods used to get within arm’s length needs to be documented in the fracture critical portion of the inspection report.

Scour Critical Bridges/Scour Assessment Under development.

Agency Developed Elements Under development.

Other Inspection Procedures 1.6.10.1 Steel Culvert Measurements All steel pipe are to have internal measurements that are to be taken at intervals throughout the pipe. Fill out the SPP Measurement Log SFN 52137 in Appendix B when performing an inspection on steel pipe. 1.6.10.2 Vertical Clearances On any new or replacement structures that cross over a roadway, Bridge Division or consultants inspection staff will measure the vertical clearance and complete the appropriate Vertical Clearance form as part of the initial inspection. This will be performed before the roadway is opened to traffic to allow the data to be entered into the automated routing system. On any major rehabs where the On roadwork that changes the vertical clearance under a structure such as an asphalt overlay, NDDOT construction personnel will be required to measure and complete the appropriate Vertical Clearance form prior to opening traffic to allow the data to be entered into the automated routing program. The Bridge Division inspection staff will verify these measurements at the following routine inspection. The Vertical Clearance forms can be found in Appendix C. 1.6.10.3 Delamination Surveys – State Structures Only Delamination surveys need to be completed when a deck reaches an NBI rating of 6 or when the deck reaches the age of 15 years. 1.6.10.4 Channel Profile Channel cross sections need to be completed every 48 months during a routine inspection for structures over water. Fill out the Channel Profile SFN 17336 form in Appendix D.

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1.6.10.5 Approach Guardrail and End Treatments Under development. 1.6.10.6 Maintenance Suggested Items Under development.

Closed Structures Structures that are currently closed, the inspectors need to provide verification that the structure is positively closed and not being used by vehicular traffic. Immediately contact the Bridge Division if positive closure is not in place.

Railroad Right of Way Work within the railroad right of way will require coordination with the railroad. Consultants will be responsible to coordinate and obtain any insurance, flagging, or agreements necessary for inspection of bridges that cross railroad right of way.

1.7 QUALITY CONTROL/QUALITY ASSURANCE

NDDOT Staff Performed Inspections QC/QA will be performed on all inspections. The QC will be performed by the accompanying Team Leader for each team. Each team will periodically QC the other teams’ inspections. This will help ensure the inspections are reviewed by an independent source. The QA will be performed by NDDOT Bridge Division office staff, primarily the Bridge Inspection Engineer.

Consultant Performed Inspections Consultants need to follow the QC/QA plan that was included within the proposal submitted during the Request for Proposal period. If the QC/QA plan should change, alert the NDDOT for prior approval of the change.

APPENDICES

APPENDIX A

IDENTIFICATION CODE

STATE CODE (ITEM 1 IN THE OLD NBIS ) 3 DIGITS

The first two digits are the Federal Information Processing Standards (FIPS) code for states and the third digit is the FHWA region code. While the following numbers represent the NBI coding, Pontis allows selection from a drop-down menu that contains the actual state names. State Codes Code State │3│8│8│ North Dakota

Code State Code State 014 Alabama 308 Montana 020 Alaska 317 Nebraska 049 Arizona 329 Nevada 056 Arkansas 331 New Hampshire 069 California 342 New Jersey 088 Colorado 356 New Mexico 091 Connecticut 362 New York 103 Delaware 374 North Carolina 113 District of Columbia 388 North Dakota 124 Florida 395 Ohio 134 Georgia 406 Oklahoma 159 Hawaii 410 Oregon 160 Idaho 423 Pennsylvania 175 Illinois 441 Rhode Island 185 Indiana 454 South Carolina 197 Iowa 468 South Dakota 207 Kansas 474 Tennessee 214 Kentucky 486 Texas 226 Louisiana 498 Utah 231 Maine 501 Vermont 243 Maryland 513 Virginia 251 Massachusetts 530 Washington 265 Michigan 543 West Virginia 275 Minnesota 555 Wisconsin 284 Mississippi 568 Wyoming 297 Missouri 721 Puerto Rico

ND Department of Transportation District (Item 2) 2 Digits

The highway district in which the bridge is located is represented by a 2-digit code. Existing district numbers are shown below: The following numbers represent the NBI coding, Pontis allows selection from a drop-down menu that contains the actual District names.

Code District 61 Bismarck 62 Valley City 63 Devils Lake 64 Minot 65 Dickinson 66 Grand Forks 67 Williston 68 Fargo

Mile Point (Item 11) 6 Digits

If a mile point location reference system is being used in the State, code a 6 digit number to represent the mile point to thousandths of a mile. The mile point shall reference the center of the structure in the direction of increasing mileage of the Inventory Route. Code all zeros if a mile point location cannot be determined or is not appropriate. If the mile point location of the structure is at the beginning of the route mileage, code with a nominal value of 000.001 rather than 000.000. NOTE: Mile Point shall coincide with the reference point found in RIMS. This number normally coincides with the last 6 digits of the bridge number but may not because of route measure changes or relocation of highways that causes a change in the reference points.

Minimum Vertical Underclearance 5 Digits (Description and XX.XXX feet) (Item 54)

Using a dropdown menu from the Appraisal/Other Ratings tab, record the under Reference and the minimum vertical clearance from the roadway or railroad track beneath the structure to the underside of the superstructure. (When both a railroad and highway are under the structure, code the most critical dimension.)

Description

Reference feature Minimum Vertical Underclearance

Using one of the descriptions below, use the dropdown menu to identify the reference feature from which the clearance measurement is taken:

Description

H Highway beneath structure R Railroad beneath structure N Feature not a highway or railroad

In the Under Clearance box, enter the number to represent the minimum vertical clearance from that feature to the structure. If the feature is not a highway or railroad, code the minimum vertical clearance 0. Examples:

River beneath structure Code = N Feature not a highway or railroad

Railroad 31'-3" beneath structure

Highway 34'-4" beneath structure

Code Minimum Vertical Underclearance = 16.25’

16’-5” 16’-6” 16’-4” 16’-4” 16’-5” 16’-3”

Code Minimum Vertical Underclearance = 16.25’

16’-8

16’-8” 16’-9” 16’-11”

16’-9” 16’-10”

16’-9”

16’-9”

16’-11”

17’-0”

16’-10”

16’-10”

Deck Overburden (Bridges Only) (Item 208) 3 Digits

Code this item in the Agency/Bridge tab text boxes. The first box is a 2 digit number for the thickness of the overburden in inches. The second is a dropdown menu that identifies what type of overburden exists. . Possible coding for the material are listed below:

Code

Description

N

Not Applicable

1

None

2

Gravel/dirt

3

Asphalt

4

Other

Note: Structures with “no deck” coding and an overlay will be coded as having overburden.

Posting In Tons (Item 209) 2 Digits

In the Agency/Bridge Tab, code the tonnage shown on the load limit sign(s). If structure is not posted, code "00".

Inspector's Name (Item 216) 25 Digits

Inspector or inspectors who made the on-site inspection. Include all personnel who were on the inspection team.

Notes (Item 217)

Include in the Notes/Remarks a narrative description of any items that are not described in the ratings of the elements or NBI items:

Narrative statements relative to the condition or operation of the existing structure.

Alerting Statements relative to:

Items that may require maintenance.

Notification of items that may require structural analysis or other action by Bridge Division or the owner of the structure.

No Recommendations Notes shall be worded in a non-judgmental manner. NO RECOMMENDATIONS are to be made. Notes will reflect only objective statements of conditions.

Examples:

Judgmental - Guardrail and bridge markers required at bridge ends.

Non-judgmental - No guardrail or bridge markers.

ADDITIONS, DELETIONS AND CHANGES Adding Notes To add notes, the new data is entered on the form following existing information. Add the Date (month/day/ year) of the inspection to identify when the notes were added. Items that should be reviewed from inspection cycle to inspection cycle should be added here. Changing notes Notes should be changed that no longer apply. Use word type editing to delete or re-arrange notes to address the condition of the bridge during that particular inspection. Leave old notes that still apply. When adding or revising notes, it may be worthwhile to rewrite the original remarks incorporating the change to eliminate excessive wordage. If major re-wording needed, delete the old notes and add the new to the bottom after the inspection date.

ALERT ENTRIES EXAMPLES OF THE PROPER USE OF ALERT CODES

CODE REMARK 3 CRACK APPEARS TO BE DEVELOPING AT FORGE LAP ON THE

HEAD OF THE OUTSIDE EYE-BAR ON NORTH SIDE OF BRIDGE OF PANEL L1-L1'.

Good comment & correct for a fracture critical member.

3 SOUTH ABUTMENT CAP HAS TIPPED FREE OF TWO WEST PILING.

TOPS OF PILING SPLIT. REMAINDER OF CAP REST ON BACK OF OTHER PILES. CAP IS SPLIT DIAGONALLY, STARTING AT EAST END. ABUTMENT ALSO LEANING BACK 4"-7".

Good comments.

1 NW WING HAS TOP 2/3 MISSING FROM ROT DETERIORATION.

Correct code because wingwall does not greatly affect the ability of bridge to carry loads. However, if the missing wing results in erosion that is threatening the stability of the abutment or the backfill, then a code 2 may be appropriate.

3 FLOOR BEAM SLIDING OFF GIRDER IN CENTER OF STRUCTURE.

Pictures indicate that a stringer is sliding off a floor beam of a truss bridge. Alert code 3 is appropriate but terminology is incorrect.

3 MAJOR DECAY IN STRINGERS.

This may be coded appropriately but not enough info is given. In order to assess the seriousness of this, dimensions of the remaining good stringers is needed. There are also no pictures showing decayed stringer. Sketches or photos with dimensions would be appropriate.

2 SPALLING AND DETERIORATION OF CONCRETE EXPOSING

REINFORCING STEEL LOWER PORTION BOTH ENDS SOUTH PIER.

When rebar is exposed by spalling or deteriorating concrete, it is appropriate to use code 2. Sketches or photos with dimensions would be appropriate.

3 EAST ABUTMENT MOVED APPROXIMATELY 10 FEET WEST RESTING AGAINST PIER, CAUSING PILING TO BOW AND PIER CAP IS BENT. EROSION AT EAST END OF STRUCTURE.

A serious condition that is well described and backed up by several pictures.

1 SCOUR UNDER STRUCTURE 1' X 15' X 20'. Good description. 2 SEVERAL STEEL STRINGERS ARE BOWED OUT OF ALIGNMENT LATERALLY AND ARE ALSO TWISTED. DECK PLANKS NOW SUPPORTED ON THE EDGES OF THE FLANGES.

This may even be serious enough for a code 3. More details about the number of stringers and the amount of misalignment would be helpful. Pictures also would be helpful. Bridge Division reduced load capacity ratings by 75% for the defects.

3 STEEL ENCASED PILING AT NE CORNER OF TRUSS HAS HOLES

RUSTED THROUGH CASING. CONCRETE COMPLETELY DETERIORATED FOR 2.5 FEET. EXPOSED WOOD PILING SEVERELY DECAYED.

Very good description but pictures or sketches with dimensions would be helpful. Bridge Division greatly reduced load capacity rating because of the remark.

EXAMPLES OF ALERT CODES THAT WERE PROBABLY MIS-USED CODE REMARK 1 NO PREVIOUS SI&A SHEET TO LOOK AT WHEN INSPECTING

THIS BRIDGE.

This has nothing to do with structural condition or safety of the bridge and probably shouldn't be an alert item or note.

2 ABUTMENT #2 HAS NO END MARKERS AND RAILING IS CRACKED.

Neither of these affect the structures capability to carry live load and shouldn't have an alert code of 2 but are worthy of a note just not an alert code.

3 STEEL PILING SHOWING IN EACH BACKWALL. CONCRETE IS

DETERIORATING.

Pictures show abutments were built with steel pile that go all the way up to the abutment cap. A concrete curtain wall was built between the pile. The abutment was built this way and it appears to be stable and serving its purpose. Deteriorated concrete at the bottom of the abutment doesn't significantly affect structure. Probably shouldn't be an alert code at all.

3 BACKWALLS ARE SEVERELY SPALLED AND CRACKED.

Pictures indicate minor spalling at the bottom of abutment and no major cracks. Abutment is adequately serving its purpose and isn't reducing the carrying capacity of the bridge. Should be an alert code 1 at the most.

2 STRUCTURE IS VERY NARROW.

The narrowness of a bridge is recorded in Items 51 & 52. This doesn't warrant an alert code because it doesn't affect its ability to safely carry live load.

CODE REMARK 3 MAJOR SCOUR 3' DEEP EXPOSING SOUTH ABUTMENT FOOTING.

This should probably be a code 2 instead of a code 3. Remark guidelines say scour 3' to 10' deep is coded 2. Exposing the abutment footing is not necessarily serious if it is not undermined or if it is on piling. Pictures indicate that it doesn't seem to be too serious.

3 8" DIRT AND GRAVEL OVERBURDEN.

This info is OK and should be in the notes but isn't an alert code 3. The bridge will be load rated with this overburden as coded in Deck Overburden item.

2 NO BRIDGE RAILINGS.

This info is good and should be in the notes but the lack of railing doesn't affect the capacity of the bridge and thus shouldn't have an alert code.

2 SOIL ON CAPS.

This in itself does not affect load carrying capacity and is not a major concern. If caps are rotted because of this than an alert code may be appropriate. It is OK to mention this in the notes so that maintenance can be planned.

APPENDIX B

SPP MEASUREMENT LOG North Dakota Department of Transportation, Bridge SFN 52137 (7-2016)

Structure Number

Barrel Number Barrel Length

Measurements to be taken in direction of inventory, south to north and west to east. If more than one pipe, the first pipe of the inventory direction shall be number one and second number two, etc.

Use one sheet per pipe.Location Number Distance From Inlet of Pipe-All steel pipe are to have internal measurements that are to

be taken at intervals throughout the pipe. -Locations should be marked by paint spots that can aid in future identification. -Bold heads may be spray painted for location points.

A

B

A

B

CD

YEAR LOCATION DIMENSIONS

A B C D E

APPENDIX C

Inventory Route, Minimum Vertical Clearance (Item 10) 4 Digits (XX feet XX inches)

Code the minimum vertical clearance over the Inventory Route. The underclearance will be coded in Pontis over each individual roadway under the structure. The minimum clearances for a 10 foot width of the pavement or traveled part of the roadway where the clearance is the greatest shall be recorded and coded in feet and tenths. For structures having multiple openings, clearances for each opening shall be recorded, but only the greatest of the minimum clearances for the two or more openings shall be coded regardless of the direction of travel. This would be the practical maximum clearance. When no restriction exists, code "9999". If Whenever any construction has been done beneath the structure that will affect the clearance, fill out a Vertical Clearance form SFN17387 or SFN17388. Example: Code

Clearance 19'-7"

1 9

.

5 8

Unlimited

9 9 .

9

9

Note: Clearances are measured with respect to the Inventory Route. Through truss bridges which carry the Inventory Route will have a clearance coded in this field. Bridges which have the Inventory Route passing under will have a clearance coded in this field on the Inventory/Roads Tab in Pontis The Pontis data for the under structure is coded in the roadway field so no “B” bridge will be required.

APPENDIX D

CHANNEL PROFILE North Dakota Department of Transportation, Bridge SFN 17336 (7-2016)

Structure Number Date Inspector's Name

STREAM CROSS SECTION NOTE: Stream profile is to be taken on both sides of the bridge. Check appropriate directions.

Profile 1 taken on side of bridge, from N S E W N to S W to E

Measurements taken from top of Curb Rail Deck

Measurements taken at intervals. (ft.)

Measurements are as follows:

Profile 2 taken on side of bridge, from N S E W N to S W to E

Measurements taken from top of Curb Rail Deck

Measurements taken at intervals. (ft.)

Measurements are as follows:

Evidence of Scour at Bridge Yes No NA

Channel slopes washing or sloughing

Scour holes near abutments

Scour holes near piers

Bed deposits downstream

Exposure of footings

Debris collection

Riprap (if any) displaced

Existing Channel Condition Yes No NA

Are channel banks up and downstream of bridge stable?Is the channel degrading/aggrading up or downstream?

Is the Structure on a channel change?

Are there lakes, reservoirs, dams, etc., near the crossing?Does the channel appear to be moving laterally in the area of the bridge?

Substructure Condition (Below Waterline) Yes No NA

Is pier/abutment scaling?

Is pier/abutment spalling?

Is there exposed rebar?

If yes is answered to any of the questions, measurements should be taken. Also, include sketches along with dimensions when possible. These deficiencies shall be reflected in the rating of item 60. If these questions can not be answered, notify Bridge division.NOTE: Take pictures or draw sketches of any and all factors contributing to scour or movement of the channel or streambed.

Some factors are, but are not limited to, inadequate waterway area, ice jams/floes, debris, and channel/structures alignment. Give scour hole dimensions.

Enter any remarks or explanations for the above items below. Use an additional page if necessary.

Substructure Condition (Below Waterline) Yes No NA

Is there exposed piling below footing?

Are there cracks?

Is there section loss on members?