Attachment_4B_-_2023_LCYA0298_InspRpt.pdf

Lower Cibola Bridge Inspection Report

East bank of bridge viewed from Bent 3.

Structure Information

Inspection Type: Routine Maintained By: Reclamation Hart Mine Road OVER Colorado River

Colorado River Front Work & Levee System Project Lower Colorado Region Yuma Area Office

NBI #: 0304-0001 RBI #: LCYA0298

Date of Inspection: 10/26/2023 Date of Last Inspection: 9/30/2021

Bridge Name: Lower Cibola Bridge Inspection Date: 10/26/2023 NBI #: 0304-0001 Yuma Area Office

Inspection Information Inspection Members: Dustin Johnson and Frank Garcia Attendees: Jorge Ramirez Time of Inspection: 2:30 PM Temperature: 70°F Weather Description: Clear and calm Legal Description and Coordinates Aliquot Part:

NW1/4

Section:

Township:

1S

Range:

23W

Meridian:

Salt and Gila River

Latitude: 33.3032 Longitude -114.6780

Bridge Description

The Lower Cibola Bridge is located approximately 22 miles southeast of Blythe, California, in La Paz County, Arizona. The bridge is inside the Cibola National Wildlife Refuge and carries Hart Mine Road over the Colorado River. The bridge also spans over two unpaved public roads, one on each riverbank. The eight-span bridge is 557 feet long. The deck is 23 feet wide (out-to-out) with a 20-foot-wide roadway.

Seven of the eight spans are constructed of three AASHTO Type III precast/prestressed beams with a CIP reinforced concrete deck. The concrete deck, bridge railing, and deteriorated timber pile bracing were replaced, and deteriorated piles were encapsulated with a barrier wrap in 2011 (AZ BOR CIBR 900(1) - Cibola Bridge Deck Replacement Project). Spans 2, 3, 4, and 5 are each 69’-10” long; spans 1 and 8 are 68’-5” long.

Span 6 is 46’-6” long and consists of five removable, steel panels, consisting of two wide-flange beams (27WF84) with an open steel grating deck, equally spaced at 4’-4½” on centers. All eight spans are simply supported. Bents 1 thru 5, 7 and 8 consist of 18 timber piles with a CIP reinforced concrete cap. Bent 6 is placed adjacent to Bent 7, but the two bents are structurally independent; bent 6 is supported on 9 timber piles with a CIP reinforced concrete cap. The bridge railing is constructed of tubular steel rails connected to steel posts bolted to the top of the curbs.

The bridge is oriented in the east-west direction. The river flows from north to south. For the purpose of this inspection, the bridge is documented from left to right, looking downstream. The beams are numbered from upstream to downstream.

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

X Team Leader

Reviewer

Approver: Dustin Johnson, PE

Approver

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 concrete deck was replaced in 2011 and is in good condition with only minor surface cracks. The steel section had minor surface corrosion. The joints were lightly impacted by loose sand and should be cleaned out regularly to allow for thermal expansion.

The prestressed beams were in good condition. Multiple small defects were observed on the top flanges of the beams at Span 1. It is probable these were caused during the removal of the original concrete deck. Some spalls were patched with concrete, but the patches were not well-bonded to the beam. Small spalls observed on the bottom flanges of Beams 1 and 3 at Span 1 are believed to be caused by high clearance vehicle impact.

MUTCD low clearance signs have been installed on the outside beams of Spans 1 and 8.

The east abutment bearing seat had an 30-inch by 30-inch delaminated area with minor spalling at the north corner. Additional delamination was identified at the east abutment backwall. A small spall was observed at the bottom corner of one of the concrete pile caps. The protective wrapping around the piles are (is)secured by plastic bands. Many of these bands have broken off, allowing the wrapping to loosen from the pile. The broken bands should be replaced with a material more suited for the environment.

The asphalt concrete on both approaches is in satisfactory condition. Infrequent transverse cracks were observed. No rutting or raveling was identified.

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.

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

Completion Status

2017-3-A Tighten middle girder anchor nut at east abutment bridge seat.

$500 Reissued – Recommendation not in

DSIS

2017-3-B Secure power box door by installing a locking device and screw cover to pull/junction box.

$600 Complete

2019-3-E Replace broken plastic ties securing protective covering at wooden piles.

$25,000 FY23 Incomplete

2021-3-C Secure conduit crossing east abutment.

Reissued – Recommendation not in

DSIS

New or Modified O&M Recommendations 2024-3-C Tighten middle girder anchor nut at east abutment bridge seat.

2024-3-D Secure conduit crossing east abutment.

Notes to Future Inspectors

Extension ladder needed to evaluate crack on Span 1.

Wooden piles accessible by small motorboat (LC Clapper Rail). Launch ramp located 6.5 miles upstream of bridge (west side). Bank access into the boat was possible on the west end of bridge, at Bent 1 for boarding on-site.

Additional Inspection Notes and Deficiencies

Electrical control panel for navigation lights was secured. Recommendation 2017-3-B is complete.

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 7 - Good

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

58.1 – Some minor cracking. Stay-in-place forms prevents the visual inspection of the underside of deck.

58.2 – Joints lightly impacted by loose sand. Joint material in good condition.

58.10 – Minor surface corrosion on metal deck.

2. Expansion Joints F

3. Wearing Surface N

4. Rideability G

5. Curbs, Sidewalks, and Median G

6. Parapets and/or Railing G

7. Drains and Drainage G

8. Utilities G

9. Deflection and/or Vibration G

10. Other - Paint F

59 Superstructure Condition 7 - Good

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

59.2 – Small spall at top flange (6”x6”) Span 1, Beam 1.

Unbonded patches at top flange, Span 1, Beam 2. Long horizontal crack at top flange, Span 1, Beam 3. Shallow spalls on bottom flange edges, potentially from vehicle impact, Span 1, Beams 1 and 3.

59.7 – Minor surface corrosion on top flanges of metal section.

59.8 – Loose nut at bearing pad. Left abutment, Beam 2

2. Girders or Beams G

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 G

11. Other

60 Substructure Condition 7 - Good Abutments Notes (with Sub-Component Number):

60.3- Delaminated area (30”x30”) with minor spalling at north corner of east abutment. 18” long delamination at north corner of west abutment.

60.4 – Delamination at east abutment.

1. Breastwalls or Columns G

2. Piles G

3. Caps and/or Bearing Seats G

4. Backwalls and/or Bulkheads G

5. Foundations G

6. Wingwalls N

7. Weep Holes N

8. Expansion Joints N

9. Erosion and/or Scour G

10. Settlement or Deflection G

11. Slope Protection G

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

60.15 – Small spall at bottom edge of concrete bent cap.

60.19 – Plastic bands securing the protective UV wrapping to the timber piles have failed (approximately 1/3 of the piles).

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 - Wrap F

61 Channel and Channel Protection Condition 8 - Very Good

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

61.3 – Banks protected by vegetation and rip rap. 2. Erosion and/or scour G

3. Channel Protection G

4. Waterway Obstructions G

5. Adequacy of Opening G

6. Streambed Composition G

7. 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 report dated June 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 Steel beam and post 36B – Transitions 1 36C – Approach Guardrail 1 W-beam rail 36D – Approach Guardrail Ends 1 Attenuator

Waterway Adequacy See Coding Guide for a description of each rating code Item Rating Notes 71 – Waterway Adequacy 9 Bridge deck and approach above flood water elevation.

222 Approach Roadway Condition 6 - Satisfactory

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

222.4 – Asphalt approach roadway with transverse cracking.

2. Relief Joints N

3. Approach Guardrail G

4. Surfacing F

5. Erosion G

6. Settlement G

7. Signs G

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

Structure Load Rating Load Rating Details Design Loading Level: HS-20 Date of Load Rating Calculation: 11/29/2017 Load Rated By: Ryan Kent Load Rating Method: Load Factor Design Does Structure Require Load Posting? No Load Rating Controlling Member: Girder bending (steel section) and deck bending 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?

No

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

HS-20 1.16 1.94

HL-93

Legal Rating Inventory Rating Factor (RF) Operating RF Type 3 1.54 2.56 Type 3S2 1.50 2.50 Type 3-3 1.59 2.65 Notional Rating Load (NRL) 0.99 1.65

SU4 1.34 2.23

SU5 1.24 2.06

SU6 1.12 1.86

SU7 1.04 1.73

EV2 1.18 1.98

EV3 0.88 1.47

Structure Inventory & Appraisal (1 of 2)

Structure Inventory & Appraisal (2 of 2)

Photographs

Photo 1: Typical bridge deck surface and expansion joint.

Photo 2: Steel deck section.

Photo 3: Underside of bridge structure.

Photo 4: Hairline cracking at prestressed concrete beam, Span 1.

Photo 5: Unbonded patch at Span 1, Beam 2.

Photo 6: Loose nut at left (east) abutment.

Photo 7: Delamination/spalling at north side of east abutment.

Photo 8: UV wrap missing, remaining wrap is unsecured. Typical at all abutments.

Photo 9: Typical approach roadway.