B08 Solicitation 140A1621R0015_Attachment 3_SOW.docx

Synopsis/Solicitation: 140A1621R0015 BIADOT Bridge Assessment Services Attachment 3 – SOW

STATEMENT OF WORK (SOW)

FOR

BRIDGE ASSESSMENT SERVICES,

BUREAU OF INDIAN AFFAIRS DIVISION OF TRANSPORTATION

I. GENERAL

The goal of this project is to update the National Bridge Inventory (NBI) through inspection of bridges owned by the Bureau of Indian Affairs (BIA) and tribal governments and to inform the BIA Department of Transportation (BIADOT) of the conditions of the bridges. These bridges will be referred to as “In-Service” bridges hereafter in this Scope of Work (Scope). The bureau and tribal governments will be referred to as the “owner” hereinafter in this Scope.

The National Bridge Inventory Standards (NBIS) requires all public bridges to be inspected at least every two years (with the approval of the Federal Highway Administration (FHWA) and the agreement of the owner, some of the bridges that meet specific Federal criteria may be inspected every four years).

The purpose of this agreement is to conduct bridge inspections on In-service bridges in accordance with the requirements of the National Bridge Inspection Standards (NBIS) and to report the findings to the FHWA and to the owner. The bridge inspections shall be referred to as “the work” henceforth in this Scope. The structures to be inspected must meet the NBIS definition of a bridge as follows:

“A structure, including supports, erected over a depression or an obstruction such as water, a highway, or a railway and having a track or passageway for carrying traffic or other moving loads, and having an opening measured along the center of the roadway of more than 20 feet between under copings of abutments or spring lines of arches, or extreme ends of openings for multiple boxes; it may include multiple pipes, where the clear distance between openings is less than half of the smaller contiguous opening.”, BIA has approximately 1,000 In-service bridges. The list of bridges to be inspected during each of the agreement periods will be identified prior to the renewal of the agreement for each of the periods. The BIA Bridge Program Manager (BPM) may also direct the consultant(s) to inspect other bridges as necessary.

The period of performance for this contract is for one (1) base year and four (4) option years, with a six (6)-month option to extend services. The total period of performance shall not exceed sixty-six (66) months.

II. DEFINITIONS

A. AASHTO – American Association of State Highway and Transportation Officials.

B. ELECTRONIC DATA FILES - Electronic files containing inventory and inspection data for structures in the Bridge Management System (BMS), or other database format, specified by the BIA Bridge Program Manager. Electronic sketches of all the bridges identified as a drawing (dwg) in either Autodesk or Microstation format. PDF files of all inspection reports. Electronic files of bridge photographs as described in section IX, paragraph E of this scope. Electronic rating input files. PDF files of entity bridge maps.

C. ENGINEER – BIA Bridge Program Manager or designee.

D. ENTITY BRIDGE MAPS – County or other entity maps that are used to graphically record bridge locations.

E. FHWA – Federal Highway Administration.

F. FY – Fiscal Year

G. NEW STRUCTURES – Structures not previously inspected such as newly constructed structures requiring initial inspection or structures found to be qualifying and without prior inspections.

H. NHS – National Highway System.

I. IN-SERVICE – Those public bridges which are owned and maintained by tribal governments and the BIA.

J. BMS – Bridge Management System Inspection form. A structure inspection form found within the inspection module of Integrated Transportation Information Management System (ITIMS), on which the applicable structure condition states and comments are reported for each structure inspected.

K. SI&A – Structure Inventory and Appraisal form. An inventory and appraisal form found within the BMS inspection module that contains information about a structure.

L. STRAHNET – Strategic Highway Network

M. TEMPORARY BRIDGE – A structure with temporary shoring or temporary repairs or a structure erected to maintain traffic, for the short term, pending permanent repair or replacement.

III. INSPECTION STANDARDS

The work shall be carried out in accordance with the following documents and revisions thereto:

A. BIADOT Bridge Inspection Handbook (2020), B. AASHTO Manual for Condition Evaluation of Bridges

C. Bridge Inspection Reference Manual

D. Recording and Coding Guide for the Structure Inventory and Appraisal of the Nation’s Bridges (Report No. FHWA-PD-96-0010), most recent version

E. Underwater Inspection of Bridges (Report No. FHWA-DP-80-1)

F. Inspection of Fracture Critical Bridge Members (Report No. FHWA-IP-86-26)

G. Hydraulic Engineering Circular No. 18 (HEC-18, Publication No. FHWA-IP- 90-017), H. Hydraulic Engineering Circular No. 20 (HEC-20, Publication No. FHWA-IP- 90-014)

IV. CONSULTANT QUALIFICATIONS

The Consulting firm shall be pre-qualified to conduct bridge inspection work for the US Department of the Interior – Bureau of Indian Affairs (BIA) Division of Transportation.

The individual in charge of the organizational unit, in charge of the inspection team, and the bridge inspectors, shall meet the qualifications as stated in the Code of Federal Regulations, 23 CFR, 650.307.

V. PROJECT MANAGEMENT AND COORDINATION

The Contract Administrator for the work is:

Michael Conway

The Bridge Program Manager referenced in this work is:

Michael Vasquez, PE BIA Bridge Program Manager & Load Rating Engineer 1001 Indian School Road, NW Suite 227 Albuquerque, NM 87104

(505) 563-3323

Project management activities will be coordinated by: Michael Vasquez, PE - COR

VI. PROJECT LOCATION(S)

The project locations and last inspection (MON/YR) will be included with each task order. The Bureau of Indian Affairs (bureau) has ownership of structures that also will vary by size, type and age. The bureau reserves the right to combine or otherwise modify any, or all, of the structures in a particular year and to select the consultant(s) to perform the work in accordance with these modifications at the conclusion of the consultant selection process. The Bridge Program Manager may revise the volume of bridges to be inspected in either the odd or even years.

These inspections are broken down by fiscal year (FY), which include ownerships of both BIA and the tribes, which contain the inspection year and associated National Bridge Inventory (NBI) Structure Numbers (StructID) are as follows:

A. FY2021

See Exhibit B. InspList - FY2021

B. FY2022

See Exhibit B. InspList - FY2022

C. FY2023

See Exhibit B. InspList - FY2023

D. FY2024

See Exhibit B. InspList - FY2024

E. FY2025

See Exhibit B. InspList - FY2025

F. UNSHEDULED INSPECTIONS

A. Unscheduled inspection of bridges will be required from time to time. These inspections are typically for newly constructed bridges that require a post-construction inspection. At times, a local entity will request an inspection for bridges that the local entity has discovered to have an apparently critical problem.

B. Newly constructed bridges must be inspected and rated within thirty days of notification from the Bridge Program Manager.

C. Special inspections shall be conducted at the request of the Bridge Program Manager for non-NBI qualifying, BIA- and tribally-owned structures. The inspection requirements and standards outlined within this scope of work shall apply to these structures.

VII. PROJECT DURATION

A. The period of performance shall be specified per Task Order.

B. Completion is defined as (1) having submitted all bridge reports in the required format to the Bridge Program Manager for review, (2) the Bridge Program Manager having reviewed and approved the reports for distribution to the owners, and (3) the presentation of the final reports to the owners in a meeting held at a location specified by the owner or the Bridge Program Manager.

VIII. CONSULTANT RESPONSIBILITY

A. The consultant shall be responsible for the complete inspection, rating, and reporting of qualifying In-service bridges as specified in the task order. NBI-level bridge inspections shall be conducted within the same month that the structures were last inspected. When this timing requirement cannot be met, written notification shall be given to the Bridge Program Manager.

B. It will be the responsibility of the consultant to coordinate the access to the Bridge Management System in the Trust Network. This is to ensure that the 90-day data input requirement is met.

C. The consultant shall stay informed of changes in the bridge inventory under their charge due to annexations, replacements, or newly constructed bridges. The consultant shall inform the Bridge Program Manager of these changes.

D. The consultant shall follow the procedures specified in Appendix A of the Scope when a critical bridge condition is encountered.

E. The consultant shall insure that bridges are properly posted and signed. Photo documentation of the posting sign shall be included with each inspection report.

F. The consultant shall submit completed inspection reports to the Bridge Program Manager for review prior to submitting the reports to the owner.

G. The consultant shall conduct the work in accordance with all governing safety rules and regulations applicable to the work.

IX. INSPECTION REQUIREMENTS

A. All bridge coding items shall be completed per the requirements of the NBIS and BIADOT in accordance with the following:

1. The FHWA Manual Recording and Coding Guide for the Structure Inventory and Appraisal of the Nation’s Bridges, December 1995 (Federal Coding Guide) shall be used until the updated Coding Guide is released and thereafter shall be referenced and utilized, except that English Units shall be recorded unless otherwise noted,

2. The BIADOT Structure Inventory Coding Guide (if available), and

B. The consultant shall meet with the Bridge Program Manager at the beginning of each quarter to present a progress report for the previous quarter and a project schedule for the next quarter. The progress report shall list the entities inspected and the number of bridges and types inspected in each entity. The schedule for the next quarter shall include the entities to be inspected, the number of bridges and types in each of the entities, the personnel assigned to do the work, and the approximate dates that the inspections will commence in each entity.

C. The consultant shall contact each bridge owner thirty (30) days prior to beginning work in the owner’s area. The consultant shall meet with the bridge owner at the owner’s request. The purpose of this contact or meeting is to identify themselves to the owner, to learn of changes in the inventory, to present their plan of action to the owner, and to obtain information pertinent to the inspection such as plans, maps, etc.

E. A minimum of six (6) color photographs from digital cameras are required for each bridge. One photograph shall show the complete bridge in an elevation view and the other photograph shall show the entire roadway surface of the bridge looking in the direction of inventory. The roadway photo may be taken looking in the opposite direction the next inspection cycle and alternate between the two, thereafter. The elevation view, if possible, shall be taken from the upstream side where roadways cross waterways. The elevation view may be taken from the downstream side if that view of the bridge is less obstructed by vegetation. One photograph shall be taken at the bottom of the superstructure or culvert, showing the girders if applicable and oriented to look down the center of the roadway from beneath the structure. In all cases the description of the photo shall identify the direction in which the photo is taken. Digital cameras shall be a minimum of 2-megapixel resolution capabilities. Individual photo sizes shall be limited to less than 500 kilobytes where possible. In addition to providing the paper photographs, the pictures shall be stored and submitted on a portable drive.

F. Supplemental photographs and sketches shall be completed to give a clear understanding and documentation of distressed bridge conditions.

G. A separate set of photographs, taken in a panoramic view, is required for those bridges that are over waterways. These photos shall be taken every six years unless changes merit a more frequent interval. The procedures for taking the scour photographs are defined further in this scope of work.

H. The bridge condition states and comments and the SI&A items shall be reported with the inspection notes or other report approved by the Bridge Program Manager. The SI&A information shall be revised, if necessary, to reflect the actual elements, quantities, comments and items found in the structure. For re-inspections, many of the items listed on the form will remain the same as in previous reports and need not be changed unless found to be in error or changed since the last inspection report.

I. A cross-section shall be provided with each inspection for structures that span across waterways, dry streambeds, gullies, or other potential waterways. The cross-section shall be plotted on the structure sketches and made a part of the report. The cross-section shall be measured as noted by a previous reference point or other structural members and taken at each pier, abutment midpoint of each span, and intermediate locations as appropriate. The new cross-sections shall be plotted over previous cross-sections to determine if scour or degradation is occurring. The consultant shall inform the Bridge Program Manager in writing, whenever the following conditions are found:

1. A general channel degradation, as determined by the cross-sections, of 1’ or more, and/or

2. Local pier and/or abutment scour of 2 ft., and/or

3. Footings or pilings have become exposed.

The letter shall specifically identify the problem being reported, the location of the problem, and recommended action for the entity to take. The recommended action may include, but is not limited to monitoring, load restrictions, closure, a brief description of a repair, or a recommendation for a hydraulic evaluation and structural analysis of the bridge that is beyond the services to be provided under this agreement.

K. Completed inspection reports shall be submitted to the Bridge Program Manager within 30 days after completing an order or at the end of the contract period whichever is earlier.

L. Railroad bridges, pedestrian bridges and tunnels are special structures that require inspection. The inspection requirements are the same as highway structures. Railroad bridges and tunnels need not be load rated. Pedestrian bridges may be load rated, if directed by the Bridge Program Manager.

M. If cracks or other flaws are suspected in steel members, non-destructive testing (NDT) (dye-penetrant, magnetic particle, or ultrasonic) shall be performed on the suspected portion to accurately determine if cracks or other flaws are present. Consultants shall have the appropriate NDT equipment present at each steel structure inspection site.

N. Each inspected bridge shall be located using GPS equipment to obtain longitudes and latitudes. GPS equipment shall be accurate to within ten feet. The GPS reading shall be taken at the centerline of roadway at span midpoint.

X. STRUCTURAL ANALYSIS REQUIREMENTS

A. Each new structure, and any previously inspected and rated structure for which the rating may have changed because of structural reasons (subject to paragraph E in this section) since the last inspection, shall be rated in accordance with the current AASHTO Manual for Condition Evaluation of Bridges, AASHTO Standard Specifications for Highway Bridges, and BIADOT Bridge Load Factor Rating Manual (if available). The load rating capacity shall be reported on the Load Rating Summary Sheet to include HS20, SHV, EV2, EV3, Type 3-X and other ratings as applicable.

B. The consultant shall employ those computer applications currently used by the BIADOT Load Rating Engineer unless otherwise approved to evaluate the load carrying capacity. Any re-rates or new ratings shall be performed using BRASS, as applicable. Ratings shall be complete and independent of any previous analysis. The cost of the computer runs shall be included in the cost of the work.

C. If the current physical condition of the structure and present loadings (subject to paragraph E in this section) accurately reflect those assumed in an existing load rating, the structure need not be re-rated. However, the Load Rating Summary Sheet shall clearly state that, in the judgment of the consultant, the bridge did not require re-rating and the statement shall be signed by the consultant. The work involved with this shall be included in the regular inspection of the structure and not be paid for separately.

D. Special Rating Conditions:

1. Normally, substructures are not analyzed in establishing the load ratings. However, if the consultant finds deteriorated conditions in the substructure that affect the load carrying capacity of the bridge, the consultant shall conduct a substructure analysis and load-rate the bridge based on the controlling rating. The ratings of the superstructure and substructure shall both be noted on the Load Rating Summary Sheet when the substructure is the controlling unit.

2. Concrete structures for which details of reinforcement are not known, and for which a reasonable search cannot locate plans, must be rated visually using sound engineering judgment. As a rule, load restrictions will not be required if distress is not visible and the Load Rating Summary Sheet shall indicate a 36 Ton inventory rating and a 40 Ton operating rating and clearly state that the rating was a visual rating based on field observations. Refer to the BIADOT Bridge Inspection Handbook (2020) for more detailed description.

3. Bridges shall be re-rated when:

a. The change in asphalt or gravel thickness from the previous rating amounts to 3” or more.

b. Structural conditions change. For example, when one or more timber stringers have broken, split, or otherwise lost section capacity since the previous rating.

c. The structure was widened or rehabilitated and not re-rated at that time.

d. Other conditions exist that suggest re-rating is needed or as assigned by the BPM. The condition must be documented with the new rating.

XI. FRACTURE CRITICAL STEEL BRIDGES

Fracture critical members are those defined by the FHWA in their manual titled Inspection of Fracture Critical Bridge Members and shall be identified and inspected in accordance with that document.

A. Fracture Critical Members (FCM), or member components, are non-redundant tension members or tension components of members whose failure would be expected to result in collapse of the bridge.

B. Some examples of fracture critical bridges are two-girder systems, two-girder steel box sections, two-truss systems, tied arches, suspension spans, simply supported cross girders and pier caps, and two-girder systems using pin and hanger supports.

C. The consultant shall identify steel structures with members classified as “Fracture Critical” and shall identify the members on copies of the plans or on sketches and made a part of the structure folder. The consultant shall provide a list of the fracture critical bridges to the Bridge Program Manager with each submittal of the inspection reports.

D. The inspection plan shall identify the following fracture critical safety risk factors: a) Fatigue and fracture prone details, b) Problematic materials, c) Poor welding techniques, d) Potential out-of-plane distortion details, e) Previous cracking or repairs, f) Source of prior cracking, g) Cold service temperatures, and h) Posted for load, i) Superstructure condition code of 4 or less, j) Subjected to overloads or impact damage, k) Older service life, l) Debris build-up, and m) High ADTT. The consultant shall create a separate FCM inspection plan and procedure templates for a two-girder bridge system and a truss bridge system.

E. Ultrasonic testing shall be conducted on the pins of pin-connected trusses and the pins and hanger straps of the connected girders. A list of the bridges to be tested in this manner will be provided by BIADOT. Pins and hanger straps that the consultant has special concern about may be inspected on a more frequent interval as agreed to, or directed, by the Bridge Program Manager.

F. Ultrasonic testing shall be done in accordance with the requirements specified in Appendix C, “Ultrasonic Inspection Procedure for Bridge Pins and Hanger Straps”. Use of dye penetrant and/or magnetic particle NDT methods is considered part of the regular inspection work and not paid for separately.

XII. UNDERWATER INSPECTIONS

A. Underwater inspections shall consist of any appropriate method, short of employing diving or remote submersibles, to evaluate the structure below the waterline. For water depths up to 3’, the consultant shall investigate the foundation conditions by probing and/or feeling for undercutting of the foundation or other problems such as deterioration of foundation elements.

B. All bridges with piers and/or abutments with typical water depths in excess of 3’ throughout the year shall be recorded in the reports and a list of the submerged substructure units provided to the bridge inspection engineer. The substructure units below the waterline will be inspected under a separate task order in fiscal year 2024 and at 4-year intervals thereafter.

C. The underwater (UW) inspection plan shall identify the following underwater safety risk factors: a) Rapid stream or tidal flows, b) Significant debris accumulation, c) Constricted waterway opening, d) Soft or unstable streambed, e) Pollutants in water, f) Limited visibility under water, g) Marine environment, and h) Meandering channel. The consultant shall create a UW inspection plan and procedure template for relevant structures and include the submerged elements’ respective locations. These templates shall include the above-mentioned specific safety risk factors associated with each system and shall be included with the final submittal.

XIII. SITE REVIEW

A. A site review will be required for all bridges recommended for closure to verify that they are closed. Photographs shall be taken to record the visit and, if appropriate, notes shall be made and included in the structure folder.

B. Bridges that have been removed and replaced with non-qualifying structures shall be photographed and a short narrative shall be provided describing the replacement structure. These bridges shall be removed from the bridge inventory.

XIV. SCOUR ANALYSIS/REPORT

A. The scour analysis report shall be sealed by the professional engineer performing the analysis.

B. Scour depth shall be determined per the guidelines documented in the HEC-18 manual.

C. If a local scour analysis has not previously been conducted for structures over a watercourse, a depth of scour prediction shall be made in accordance with HEC-18. A reasonable effort shall be made to determine the foundation type, e.g. spread footing, piling, caisson, etc., so that a risk factor may be determined. Canal crossings and shale stream bottoms are examples of conditions where scour analysis may not be necessary. The Bridge Program Manager shall approve the scour analysis prior to it being performed for structures with a low scour potential (i.e., structures over lined channels, canals, or other controlled waterways).

D. For each bridge analyzed for scour, the consultant shall submit the following information as part of the final report. This information shall be presented by an editable table with the Structure ID and the following corresponding data separated by columns:

E. For each bridge analyzed for scour, the consultant shall submit a table showing structure number; feature crossed; calculated scour depth for a 500-year flood; distance to bottom of bridge footing, piles or other foundation type referenced to the bottom of the upstream girder (bridge foundation type may be unknown); type of streambed foundation material; velocity of stream; pier dimensions; pier type, slope of the streambed, depth of flow. The procedure for conducting this work is as follows:

1. Make visual observation of bridge site relative to the drainage basin.

2. Probe at abutments and piers to identify and record scour and undercutting.

3. Measure and record pier width, length, and pier nosing. Determine angle of flood flow to pier centerline.

4. Determine streambed cross-sections 500’ upstream and 500’ downstream, as site features will allow, measured from the upstream edge of the bridge and tied to streambed cross-sections taken during the regular bridge inspection.

5. Identify streambed material types e.g. boulders, cobbles, gravel, sand, silt, etc.

6. Take a minimum of two photographs looking upstream and two photographs looking downstream in a panoramic manor to get as much of a view of the contributing area as possible.

7. When practical, discuss stream flow history with local people.

8. Estimate the depth of maximum flow considering one of the following:

a. Depth of flow equal to the vertical distance from flow line to bottom of girder.

b. Depth of flow equal to the vertical distance from flow line to top of channel banks where visual inspection indicates water will flow away from the bridge.

c. Depth of flow equal to the vertical distance from flow line to 3ft. above the channel banks when visual inspection does not indicate where water will flow away from the bridge.

9. Where bridges are determined to be scour critical or have unknown foundations, determine and report the water surface level at which the bridge should be closed.

10. If the depth of scour is below the foundation, then the bridge is considered to be scour-critical. If there is calculable scour, but not below the bottom of the foundation, perform a structural analysis to determine whether or not the bridge is unstable. The scour analysis shall be included in the report and shall be used for coding Item 113.

XV. REPORTING

A. The consultant shall use a BIADOT-provided portal access to BMS for collecting and reporting bridge inspection data and NBIS inventory information. In addition to their own computer equipment, the consultant shall provide final reports, in a pre-approved format, with original signatures, to the owner and to the Bridge Program Manager. The electronic data files, as described in Section II, paragraph B, shall be provided only to the Bridge Program Manager. The Bridge Program Manager will provide the electronic data file to the entity at their request

B. Each inspected structure shall be located on the entity maps. If a structure has been permanently removed, the entity map shall be modified accordingly. Maps that have become illegible shall be redone.

C. With the approval of the bridge inspection engineer, the consultant may generate his own SI&A forms that conform to the requirements of BIADOT and the NBIS.

D. Completed inspection reports containing SI&A information currently as found in the existing Bridge Management System (BMS), ratings, sketches, and other pertinent documentation shall be included in a structure folder and one shall be submitted to the Bridge Program Manager and one copy to the entity.

E. All forms shall include the inspector’s and/or rater’s original signature and the appropriate date.

F. Overwriting of previous reports is not acceptable.

G. As necessary, supplemental sketches, photos, plans, etc. shall be prepared and included as part of the final report to document bridge condition.

H. If a bridge is rated or re-rated, all rating calculations and a new Load Rating Summary Sheet shall be submitted as part of the final report. An electronic copy of the input file shall be submitted on a portable drive.

XVI. SERVICES AND MATERIALS AVAILABLE FROM BIADOT

The following services and materials will be available to the consultant from BIADOT:

A. All forms required to be completed for each inspection.

B. Load Rating Summary Sheets (if available)

C. Most current designated STRAHNET and NHS routes (identified in the database).

D. Electronic files on computer disks in the software application version specified by the bridge inspection engineer, compatible with any personal computer (PC). These will be provided on an entity basis and will reflect the current inventory. Edit features of the electronic files will be used in the analysis and review of the inspections.

XVII. FINAL REVIEW

A. Each structure folder will be reviewed by the Bridge Program Manager for completeness and consistency. Each incomplete or inconsistent report will be returned to the consultant for review and for corrections

B. The consultant shall hold a final report presentation meeting with each entity when all inspection work is completed, and reports have been accepted by the Bridge Program Manager. This presentation shall occur no later than 60 days from the date that the final reports are accepted by the bridge inspection engineer. This will be a joint review with the program personnel and the consultant to discuss the inspection reports. This review will be held at a mutually agreed upon location. A letter documenting this meeting shall be submitted to the Bridge Program Manager. If the bridge program personnel choose not to have the presentation, the letter will state that the officials declined the presentation. The consultant shall notify the project manager of the meeting by e-mail and extend an invitation for the project manager to attend.

C. The Bridge Program Manager or his designee may accompany the consultant during field inspections or visit the office of the consultant to review procedures and inspection reports and to verify billings.

XVIII. METHOD OF PAYMENT

These contracts will be paid for on a specific rate of pay basis. The consulting firms will bill for their actual costs, using the negotiated rates, incurred while performing the work. The consulting firms will be paid after turning in the billings and support documents for each progress report. Invoices must be emailed to the Contracting Officer’s Representative (COR) and Contract Administrator for approval first, before uploading into the Invoice Processing Platform (IPP) for payment processing (refer to contract clause “Electronic Invoicing and Payment Requirements – Invoice Processing Platform (IPP)” for further details on invoicing).

Quarterly progress reports shall be prepared by the consultant and delivered to the BPM. The consultant will produce a quarterly technical progress report in standard contractor format and provide a compiled quarterly report for all sites and tasks supported. The quarterly report will include reports for completed trips associated with this task and the following items on as needed requirement. In addition to the types of reports listed in the Handbook, additional reports related to the task order shall be requested, i.e. payroll, updated schedule(s) and critical findings.

The Contracting Officer’s Representative (COR) will review the consultant deliverables in accordance with all specifications stated in this statement of work and the deliverables. Deliverables will be monitored and tracked by the COR and designated government personnel. The designated government personnel will assist the COR in prioritization of the requests, providing quality assurance input to the COR for acceptance of completed work and actual closure of each task order.

APPENDIX A - IDENTIFICATION OF CRITICAL BRIDGE CONDITIONS

A. PURPOSE: This appendix establishes the procedures of the BIA Department of Transportation, Bridge Program Management regarding the general subject of a critical bridge inspection finding (CIF). The term “critical” as contained within these procedures is intended to mean a structural or safety related deficiency that requires immediate follow-up inspection or action.

Bridge postings and/or closings result in many short-term adverse effects on the delivery of public and private service locally but in themselves do not necessarily constitute a critical condition. Rather, deficiencies that are such as to compromise the ability of the structure to safely convey traffic are deemed to be critical inspection findings (CIF) requiring immediate identification, notification, correction, and follow-up.

B. TYPICAL CONDITIONS: The following represents typical but not all-inclusive inspection findings which are considered to be a CIF:

1. Tension Members Tension members identified as fracture critical members within the Structure File Data and which are damaged by natural or impact forces.

2. Load Capacity A condition which results in a restriction of the maximum acceptable load carrying capacity of a structure to some value less than 27 Tons on the Type III, 3-axle truck at the Operating Rating level.

3. Timber Structures

a. Three adjacent crushed stringers

b. Three broken stringers in one span, two of which are adjacent to one another.

c. Stringers with rot at the ends, which may cause the stringer to fall off the timber cap.

d. “Mushrooming” for a depth of 2” on three adjacent stringers.

e. Rot in the top of 80% of all stringers in one span, which reduces the effective depth by 25%.

4. Concrete Structures

a. Concrete girders with over 30% of the primary moment steel severed.

b. Loss of section in beam ends and/or spalls in concrete girder supports where girders have less than 80% bearing area remaining.

c. Girders sheared at the ends to the extent that displacement has occurred.

5. Steel Structures

a. Trusses with misalignment of a top chord member in an amount that exceeds half the width of the member.

b. One element of a two-element bottom chord truss member being severed.

c. The bottom flange of a steel girder being severed.

d. Bottom chord truss members with over 30% section loss.

e. Steel culverts including Super Spans with unusual displacement of the section and/or gaps at the point of overlap and cracks in bolt lines.

6. General – All Structures

a. Scour which has caused vertical or horizontal displacement.

b. Scour under a spread footing, which has caused a loss of 15% of the bearing area.

c. Substructure problems that threaten the structural integrity of the bridge.

C. It shall be the responsibility of the Bridge Inspection Team Leader performing an inspection to be alert for conditions other than identified above which may also be considered a CIF. Such a finding shall be reported to the owner upon return from the inspection or, if deemed necessary, immediately by telephone or in person.

D. The criticality of the deficiency will result in one or more of the following actions (types) with an importance described as follow:

1. Immediate closure.

2. Posting load limits.

3. Restricted traffic usage.

4. Urgent repairs.

E. SPECIAL ACTIONS REQUIRED OF THE INSPECTION TEAM LEADER:

1. The team leader shall notify the owner by phone, or in person, when the actions identified as 1 through 3 above are appropriate. The team leader should describe the unsafe condition and recommend immediate steps to be taken to ensure safety to the traveling public.

2. The team leader shall provide written confirmation to the owner for any action required by 1 above. Copies of the confirmation with supporting documentation shall be sent to the Bridge Program Manager.

3. Within ten working days after an owner has been informed of a type 1, 2, or 3 deficiency, the consultant shall contact the Bridge Program Manager by phone to determine what action was taken. The consultant shall send a follow-up letter to the Bridge Program Manager describing what action was taken as a result of the critical inspection finding (CIF).

4. The consultant shall notify the owner in writing of Type 4 deficiencies within one week using BIADOT’s Urgent Bridge Work Form (BPUW 2020) located in Appendix I. Forms of the BIADOT Bridge Inspection Handbook (2020). This notice should include comments relative to an appropriate repair. This does not mean that the consultant must provide a design for the repair. A copy of the notification shall be sent to the Bridge Program Manager. The Bridge Program Manager will review all documentation, as described in paragraph E.2 above.

APPENDIX B - BRIDGE CLOSURE REQUIREMENTS

A. A bridge MUST BE CLOSED if it is not capable of carrying 3 Tons at the operating level. Refer to Appendix III. Bridge Closure Guidance of the BIADOT Bridge Inspection Handbook (2020) for further guidance.

B. Bridges with an Inventory Rating of 3 Tons must be posted with a gross load of # Tons and must be closed to trucks.

C. Bridges that require closure must be closed per the MUTCD signing and barricading specifications. The “ROAD CLOSED” sign shall be placed at the point of physical closure. If the jurisdiction desires, the message may be changed to “BRIDGE CLOSED”. This sign is to be accompanied by a permanent Type III barricade installation that completely closes the roadway to the passage of vehicles.

D. Due to the tendency for the public to move and/or drive around barricades, particular effort should be made to ensure that a substantial installation is used.

APPENDIX C – ULTRASONIC INSPECTION PROCEDURE FOR BRIDGE PINS AND HANGER STRAPS

A. Refer to Guidelines for Ultrasonic Inspection of Hanger Pins PUBLICATION NO: FHWA-HRT-04-042, JULY 2004