Attachment_3C_-_2024_LCYA0048_InspRpt.pdf

AAC & Senator Wash Rd Bridge Inspection Report

Bridge elevation view looking downstream.

Structure Information

Inspection Type: Routine Maintained By: Imperial County Senator Wash Road OVER All-American Canal

Boulder Canyon Project Lower Colorado Region Yuma Area Office

NBI #: 0304-0044 RBI #: LCYA0048

Date of Inspection: 4/2/2024 Date of Last Inspection: 4/6/2022

Bridge Name: AAC & Senator Wash Rd Bridge Inspection Date: 4/2/2024 NBI #: 0304-0044 Yuma Area Office

Inspection Information Inspection Members: Dustin Johnson and Frank Macaluso Attendees: Victor Auparero Time of Inspection: 7:00 AM Temperature: 55°F Weather Description: Clear and calm

Legal Description and Coordinates Aliquot Part:

SENW

Section:

Township:

15S

Range:

24E

Meridian:

San Bernardino

Latitude: 32.8727 Longitude -114.4789

Bridge Description

The bridge is in Imperial County, California approximately one mile downstream of Imperial Dam. The bridge carries Senator Wash Road over the All-American Canal and provides access to Senator Wash Dam, Senator Wash Reservoir, and Xanyo Xamshire (formerly Squaw Lake).

The bridge is a 272.9-foot-long, three-span, steel structure with a reinforced concrete deck. The deck is 7.75 inches thick and 38 feet wide. The curb-to-curb width is 32.5 feet. Concrete curbs run along both side of the bridge. A 4-foot-wide sidewalk is located on the south (downstream) side. The bridge railing consists of two steel horizontal rails supported by steel posts bolted to the deck.

The superstructure consists of four continuous steel W36x230 girders with MC18x42.7 diaphragms. The structure is intermediately supported by two pile bents. Each bent consists of 12 precast, prestressed concrete piles and a reinforced concrete pile cap. The abutments are shallow foundations supported on the canal banks.

Report Approval Team Leader: Dustin Johnson, PE Reviewer: Jeff Lynn

Approver: Dustin Johnson, PE

Critical Findings Was a Critical Finding identified during this inspection? No If yes, describe the Critical Finding:

NA

Critical Finding Plan of Action

If a Critical Finding was identified, what is the required Plan of Action to correct the issue?

NA

Structural Evaluation Summary

The bridge is in satisfactory condition. Minor cracking was present on the bridge deck and appears unchanged from past years. The coating on the steel girders is worn and has localized failure and pinholes. The rip rap protection at the abutment has deteriorated. Erosion on the east abutment continues to progress. Repair of the canal bank and rip rap protection should be performed to prevent future undermining of the bridge foundation.

Recommendations and Estimated Costs Definitions Category 1 Recommendations involving the correction of severe deficiencies where immediate responsive action is required to ensure structural safety and operational integrity of a facility.

Category 2 Recommendations covering a wide range of important matters where action is needed to prevent or reduce further damage or preclude possible operational failure of a facility.

Category 3 Recommendations covering less important matters but believed to be sound and beneficial suggestions to improve, or enhance, the O&M of a project or facility.

DSIS

Facility

All-American Canal

Status of Previous Incomplete O&M Recommendations Number Description Cost Scheduled

Completion Status

2021-2-B Resecure bolts at west expansion joint to prevent traffic hazard.

Complete

2021-2-C Restore rip rap bank protection below bridge and backfill scour holes below concrete apron.

Reissued – Recommendation not in

DSIS

2021-2-D Repair damaged guardrail. Complete New or Modified O&M Recommendations 2024-2-A Restore rip rap bank protection below bridge and backfill scour holes below concrete apron.

2024-2-B Replace missing bolt on object marker at southwest corner of bridge.

Notes to Future Inspectors

Bridge is maintained by Imperial County per agreement 14-06-303-2693.

Additional Inspection Notes and Deficiencies

Field Inspection Report Condition Rating Codes for Items 58-62 N Not Applicable 3 Serious Condition – loss of section, deterioration, spalling, or scour have seriously affected primary structural components. Local failures are possible. Fatigue cracks in steel or shear cracks in concrete may be present

9 Excellent Condition 8 Very Good Condition – no problems noted.

7 Good Condition – some minor problems.

2 Critical Condition – advanced deterioration of primary structural elements. Fatigue cracks in steel or shear cracks in concrete may be present or scour may have removed substructure support. Unless closely monitored it may be necessary to close the bridge until corrective action is taken.

6 Satisfactory Condition – structural elements show some minor deterioration.

5 Fair Condition – all primary structural elements are sound, but may have minor section loss, cracking, spalling, or scour

1 “Imminent” Failure Condition – major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability. Bridge is closed to traffic, but corrective action may return structure to light service.

4 Poor Condition – advanced section loss, deterioration, spalling, or scour

0 Failed Condition – out of service; beyond corrective action.

Condition Rating Code Equivalents for Sub-Components G = Good (7-9) F = Fair (5-6) P = Poor (0-4) N = Not Applicable UNK = Unknown

58 Deck Condition 6 - Satisfactory

1. Deck Slab F Notes (with Sub-Component Number):

58.1 – Cracking throughout, exposed aggregate due to abrasion.

58.2 – Small amount of dirt over rubber seal at east joint. Dirt does not impact functionality.

58.5 – Regular transverse cracking 0.03” wide. Small spall on east end.

2. Expansion Joints G

3. Wearing Surface N

4. Rideability G

5. Curbs, Sidewalks, and Median F

6. Parapets and/or Railing G

7. Drains and Drainage G

8. Utilities N

9. Deflection and/or Vibration G

10. Other

59 Superstructure Condition 6 - Satisfactory

1. Bearing Devices F Notes (with Sub-Component Number):

59.1 – Minor corrosion on baseplates, pins, and bolts.

59.2 – Surface corrosion on webs and flanges.

59.7 – Multiple locations of localized coating failure.

59.10 – Girder sag between piers.

2. Girders or Beams F

3. Arches or Slabs N

4. Floorbeams and Stringers N

5. Trusses N

6. Diaphragms and Bracing G

7. Paint F

8. Connections or Welds G

9. Deflection and/or Vibration G

10. Alignment F

11. Other

60 Substructure Condition 6 - Satisfactory Abutments Notes (with Sub-Component Number):

60.1 – Minor vertical cracks.

60.3 – Bearing seats have vertical cracks (0.014” to 0.08” wide) appear unchanged.

60.4 – Minor vertical cracks.

60.6 – 18”x42” spall with exposed rebar at northwest wingwall.

60.9 – 8”-10” undercutting at west abutment apron. Up to 70” undercutting at east apron, 18” to 24” typical. Scour has yet to undercut foundation bearing material.

60.11 – Riprap protection has fully degraded at base to foundation apron.

1. Breastwalls or Columns F

2. Piles N

3. Caps and/or Bearing Seats F

4. Backwalls and/or Bulkheads F

5. Foundations G

6. Wingwalls F

7. Weep Holes N

8. Expansion Joints N

9. Erosion and/or Scour F

10. Settlement or Deflection G

11. Slope Protection P

12. Other Piers Notes (with Sub-Component Number):

60.17 – Latest underwater inspection attempt was unsuccessful due to high water velocity. Next underwater inspection scheduled for 12/2024.

13. Walls and/or Columns N

14. Piles G

15. Caps and/or Bearing Seats G

16. Foundations G

17. Erosion and/or Scour G

18. Settlement or Deflection G

19. Other

61 Channel and Channel Protection Condition 5 - Fair

1. Alignment G Notes (with Sub-Component Number):

61.2 – Erosion of east bank under bridge.

61.3 – Rip rap protection on channel banks fully degraded.

2. Erosion and/or scour P

3. Channel Protection P

4. Waterway Obstructions G

5. Adequacy of Opening G

6. Streambed Composition G

7. Other

62 Culvert Condition N - Not Applicable

1. Barrel(s) N Notes (with Sub-Component Number):

2. Footings N

3. Headwalls N

4. Wingwalls N

5. Debris and/or Silt N

6. Erosion and/or Scour N

7. Settlement and/or Deflection N

8. Alignment N

9. Adequacy of Cover N

10. Parapets and/or Railing N

11. Roadway Surface N

12. Other

Scour Critical Bridges Every bridge should have a scour evaluation report on-file that documents the code for Item 113 – Scour Critical Bridges. Every routine inspection should verify that the Item 113 code is still valid.

Item Current

Rating Valid?

(Yes/No)

Notes

113 – Scour Critical Bridges

5 Yes Scour evaluation dated 06/2020

Traffic Safety Rating Codes 0 – Does not meet standards or a safety feature is required, and none is provided

1 – Meets currently applicable standards

N – Not applicable or a safety feature is not required

Item Rating Notes 36A – Bridge Railing 1 Concrete and steel railing.

36B – Transitions 0 No transition present.

36C – Approach Guardrail 1 36D – Approach Guardrail Ends 0

Waterway Adequacy See Coding Guide for a description of each rating code Item Rating Notes 71 – Waterway Adequacy 8

222 Approach Roadway Condition 7 - Good

1. Approach Slab N Notes (with Sub-Component Number):

222.7 – Missing bolt on object marker at southwest corner.

2. Relief Joints N

3. Approach Guardrail G

4. Surfacing G

5. Erosion G

6. Settlement G

7. Signs F

8. Other

Approach Roadway Alignment 8 No speed reduction required when approaching structure 6 Minor speed reduction required when approaching structure 3 Substantial speed reduction required when approaching structure Interpolate between defined values when necessary Item Rating Notes 72 – Approach Roadway Alignment 8

Structure Load Rating Load Rating Details Design Loading Level: UNK Date of Load Rating Calculation: 5/15/2015 Load Rated By: J Romero Load Rating Method: Load Factor Does Structure Require Load Posting? No Load Rating Controlling Member:

Load Rating Notes/Summary Load Posting/Rating Evaluation Yes/No/NA Notes Is Load Posting Properly Installed (when required)?

NA

Does this structure require a revised load rating?

Yes Not rated for all applicable FHWA vehicles. Load rating scheduled for FY25.

Load Posting/Rating Evaluation Design Rating Inventory Rating Factor (RF) Operating RF

HS-20 1.25 2.09

HL-93

Legal Rating Inventory Rating Factor (RF) Operating RF Type 3 Type 3S2 Type 3-3 Notional Rating Load (NRL)

SU4

SU5

SU6

SU7

EV2

EV3

Structure Inventory & Appraisal (1 of 2)

Structure Inventory & Appraisal (2 of 2)

Photographs

Photo 1: Typical deck surface condition.

Photo 2: Typical underside of bridge deck.

Photo 3: Deck expansion joint on west side of bridge.

Photo 4: Spall on east end of sidewalk.

Photo 5: Typical girder condition.

Photo 6: West abutment.

Photo 7: West abutment bank protection in poor condition.

Photo 8: Erosion and failed bank protection at east abutment.

Photo 9: Undercutting below apron at east abutment.

Photo 10: Spall at northwest wingwall.

Photo 11: Typical pier.

Photo 12: Typical approach roadway condition.