B08_Attachment_04_Special_Bridge_Inspection_Report_11_25_24.pdf

BRIDGE INSPECTION REPORT

POINT BONITA SUSPENSION BRIDGE

POINT BONITA TRAIL OVER INLET

GOLDEN GATE NATIONAL RECREATION AREA

LOOKING EAST

STRUCTURE NO. 8140-006T

INSPECTION TYPE: SPECIAL

INSPECTION DATE: 10/23/2024

NORTH SIDE

Report prepared by:

Federal Highway Administration FLH Office of Bridges and Structures Bridge Inspection Program 22001 Loudoun County Parkway, Building E2, Suite 200 Ashburn, VA 20147 https://bridge.flhd.fhwa.dot.gov https://bridge.flhd.fhwa.dot.gov

STRUCTURE SUMMARY STRUCTURE NO. 8140-006T

POINT BONITA SUSPENSION BRIDGE INSPECTION DATE: 10/23/2024

BRIDGE IDENTIFICATION AND DESCRIPTION

MAIN SPAN MATERIAL:

MAIN SPAN TYPE:

# OF BEAMS, MAIN SPAN: .

DECK TYPE:

WEARING SURFACE:

ABUT. FOUNDATIONS:

PIER FOUDNATION(S):

ABUTMENT / PIER MAT'L: ..

PROJ./PLAN REF. NO:

NPS ROAD CLASS:

STRUCTURE HISTORY:

7 - WOOD OR TIMBER

13 - SUSPENSION

8 - WOOD OR TIMBER

0 - NONE

2 - SPREAD FTG ON BEARING MAT'L

6 - N/A

3 - WOOD OR TIMBER

UNKNOWN

6 - RESTRICTED

2012-BRIDGE REPLACED.

LOCATION

NO. OF MAIN SPANS:

NO. OF APPR. SPANS:

STRUCT. TOTAL LENGTH: .

MAX. SPAN LENGTH:

DECK WIDTH:

CURB TO CURB WIDTH:

YEAR BUILT:

YEAR RECONSTRUCTED: .

SKEW ANGLE:

FRACTURE CRITICAL:

156.0 FT (47.5 M)

156 FT (47.5 M)

4.5 FT (1.4 M)

4.2 FT (1.3 M)

0 °

Y

GOLDEN GATE NATIONAL RECREATION AREA MILE POINT: .. 0 (KM PT 0)

STATE: .............................. 069 - CALIFORNIA LOCATION: .... Point Bonita Lighthouse. Key required for access at Structure No. 8140-011T.FACILITY CARRIED: ......... POINT BONITA TRAIL

FEATURE INTERSECTED: INLET

INSPECTION TEAM: M. Burnett, T. Powell

CONDITION ASSESSMENT:

Matt Burnett

REPORT REVIEW:

Marcus Miller

REPORT APPROVAL: Date: 11/20/2024

Jorgomai Ceesay

STRUCTURE EVALUATION SUMMARY

This timber suspension trail bridge is in poor condition overall and is currently closed. The main problem is widespread protective coating failure resulting in rusting with section loss, up to 1/16”, throughout the main suspension and sway cable systems. In addition, there is widespread paint failure resulting in rusting with section loss, up to 1/16”, from the connection brackets and hardware for the truss members and towers. Other problems include cracking and erosion with undermining of the north retaining wall at the west approach, spalling with exposed rebar along the north side of the west approach slab, deterioration of the non-slip coating on the deck; and broken and loose non-skid treads on the deck.

Noticeable downward rotation for the south sway cable connection for Floor Beam #18 was observed when compared to images from the 2021 inspection report.

STRUCTURE SUMMARY STRUCTURE NO. 8140-006T

Based on the inspection findings and the results of the FHWA load capacity calculations, it is our opinion that the bridge may be reopened to pedestrians provided detailed inspections are performed every six months to ensure the structure remains safe until it can be repaired.

Corrective action should be taken as outlined in this report to prevent the possible development of more serious or costly problems in the future.

RECOMMENDATIONS AND ESTIMATED COSTS STRUCTURE NO. 8140-006T

POINT BONITA SUSPENSION BRIDGE INSPECTION DATE : 10/23/2024

226 PRIORITY OF IMPROVEMENT B

A (Critical) - Structure is closed, in immediate damage of collapse, or presents a critical safety danger.

B (Major) - Structure is seriously deficient or presents a safety hazard, but can remain open at reduced loads or with frequent inspections.

C (Moderate) - Structure is deficient, functionally obsolete, or requires substantial repairs to prevent a serious deficiency or unsafe condition.

D (Minor) - Structure is generally in good condition. Preventive maintenance may be required.

E (Special) - Structure is under construction or reconstruction.

Item No.

Maintenance Recommendations

(GENERALLY NOT FLHP ELIGIBLE)

QTY. UNIT UNIT

COST

PRELIM.

COST

ESTIMATE

PRELIM. MAINTENANCE TOTAL :

Item No.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS)

QTY. UNIT

UNIT

COST

PRELIM. COST ESTIMATES

REHAB RECONSTR

59.11 REPLACE MAIN SUSPENSION AND SWAY

CABLE SYSTEMS WITH STAINLESS STEEL

CABLES AND CONNECTIONS.

1 LS 1800000 1800000

59.5,60.

REPLACE CONNECTION BRACKETS AND

HARDWARE FOR TRUSS MEMBERS AND

TOWERS WITH STAINLESS STEEL

COMPONENTS.

1 LS 200000 200000

223.1, 223.4

REPAIR UNDERMINING OF NORTH RETAINING

WALL AT WEST APPROACH; CLEAN AND EPOXY

INJECT CRACKING OF RETAINING WALL.

1 LS 20000 20000

58.1 APPLY NON-SLIP COATING ON DECK; REPLACE

NON-SKID TREADS AS NECESSARY. 1 LS 5000 5000

222.1 CLEAN AND SEAL EXPOSED REBAR ON WEST

APPROACH SLAB (AT RETAINING WALL) WITH

APPROVED PROTECTIVE COATING.

1 LS 5000 5000

CONTRACT COSTS FOR MOBILIZATION,

TRAFFIC CONTROL, AND CONTINGENCIES. 1 LS 220000 220000

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL : 2250000

RECOMMENDATIONS AND ESTIMATED COSTS STRUCTURE NO. 8140-006T

POINT BONITA SUSPENSION BRIDGE INSPECTION DATE : 10/23/2024

226 PRIORITY OF IMPROVEMENT B

A (Critical) - Structure is closed, in immediate damage of collapse, or presents a critical safety danger.

B (Major) - Structure is seriously deficient or presents a safety hazard, but can remain open at reduced loads or with frequent inspections.

C (Moderate) - Structure is deficient, functionally obsolete, or requires substantial repairs to prevent a serious deficiency or unsafe condition.

D (Minor) - Structure is generally in good condition. Preventive maintenance may be required.

E (Special) - Structure is under construction or reconstruction.

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL :

PRELIM. REHABILITATION TOTAL :

PRELIM. RECONSTRUCTION TOTAL : .. 0

2250000TOTAL ITEMIZED COSTS:

PRELIMINARY ESTIMATE TOTAL * :

(*Includes typical contract costs for mobilization, traffic control and design/construction engineering: but does not include detour bridges, work beyond the bridge limits, or work not listed above. Estimates are approximate and are for planning purposes only; they should not be used as a complete or final engineers estimate.)

Remarks :

FIELD INSPECTION REPORT STRUCTURE NO. 8140-006T

58. DECK

1. DECK SLAB

4. RIDEABILITY

5. CURBS, SIDEWALKS, AND MEDIAN

6. PARAPETS AND/OR RAILINGS

7. DRAINS AND DRAINAGE

8. UTILITIES

9. DEFLECTION AND/OR VIBRATION

10.OTHER:

59. SUPERSTRUCTURE

1. BEARING DEVICES

2. GIRDERS OR BEAMS

3. ARCH(ES) OR SLAB(S)

4. FLOOR BEAMS AND STRINGERS

5. TRUSSES

6. DIAPHRAGMS AND BRACING

7. PAINT

8. FASCIA(E)

9. DEFLECTION AND/OR VIBRATION

10.ALIGNMENT

11.OTHER

60. SUBSTRUCTURE

61. CHANNEL

1. ALIGNMENT

2. EROSION AND/OR SCOUR

3. CHANNEL PROTECTION

4. WATERWAY OBSTRUCTIONS

5. OTHER

6. ADEQUACY OF OPENING

7. NORMAL VELOCITY

8. AVERAGE CLEAR OPENING

9. STREAMBED COMPOSITION:

222. APPROACHES

1. APPROACH SLABS

2. RELIEF JOINTS

3. APPROACH GUARDRAIL

4. SURFACING

5. EROSION

6. SETTLEMENT

7. SIGNS

8. ALIGNMENT

9. OTHER

223. RETAINING WALL

1. WALL

2. WEEP HOLES

3. FOUNDATION

4. EROSION AND/OR SCOUR

5. SETTLEMENT OR DEFLECTION

6. OTHER

G

G

N

G

G

G

N

G

N

N

G

G

F

P

N

G

G

P

G

G

N

G

N

1- SUFF

1 - HIGH

F

N

P

G

G

G

G

N

F

N

N

F

G

N

2. EXPANSION JOINTS N

3. WEARING SURFACE P

P

CABLE SYSTEM

100 FT

G

CONDITION RATING CODE EQUIVALENTS FOR SUB-ELEMENTS

G = GOOD (CODES 7 - 9) F = FAIR (CODES 5 - 6) P = POOR (CODES 0 - 4)

CONDITION RATING CODES FOR ITEMS 58 - 62, 222, 223

NOT APPLICABLEN

EXCELLENT CONDITION9

VERY GOOD CONDITION - no problems noted.8

GOOD CONDITION - some minor problems.7

SATISFACTORY CONDITION - structural elements show some minor deterioration.6

FAIR CONDITION - all primary structural elements are sound but may have minor section loss, cracking, spalling, or scour.

POOR CONDITION - advanced section loss, deterioration, spalling, or scour.4

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.

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 structure until corrective action can be taken.

“IMMINENT” FAILURE CONDITION - major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability.

Structure is closed to

FAILED CONDITION - out of service; beyond corrective action.0

ROCK

ELECTRIC LINE

1. BREASTWALLS OR COLUMNS G

2. PILE BENTS N

3. CAPS AND/OR BEARING SEATS G

4. BACKWALLS AND/OR BULKHEADS N

5. FOUNDATIONS 01 - BURIED N

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 TOWERS F

ABUTMENTS

PIER(S)

13. WALLS AND/OR COLUMNS

14.PILE BENTS

15.CAPS AND/OR BEARING SEATS

16.FOUNDATIONS

17.EROSION AND/OR SCOUR

18.SETTLEMENT OR DEFLECTION

19.OTHER

36. TRAFFIC AND SAFETY FEATURES

A. BRIDGE RAILINGS:

B. TRANSITIONS:

C. APPROACH GUARDRAILS:

D. APPROACH GUARDRAIL ENDS:

N

N

N

N

N

N

N

N

N

N

N

TRAFFIC SAFETY RATING CODES

0 - Does not meet standards or a safety features is required and none is provided.

1 - Meets currently acceptable standards.

N - Not applicable or a safety features is not required.

FIELD INSPECTION REPORT STRUCTURE NO. 8140-006T

ITEM REFERENCE AND REMARKS

58.1

59.4

59.5

MODEREATE TO HEAVY LICHEN GROWTH ON DECK, TRUSSES, STRINGERS, AND FLOOR BEAMS.

58.3 SEVERE DETERIORATION OF NON-SKID COATING ON DECK PLANKS; SLIPPERY WHEN WET. THREE (3) BROKEN NON-SKID

TREADS ON DECK; SEVERAL LOOSE.

58.6

59.5

MINOR TO MODERATE RUST STAINING ON TRUSS MEMBERS IN AREAS WHERE BRACKETS INSTALLED TO SUPPORT

HORIZONTAL RAILING CABLES.

58.6

59.4

59.5

59.7

60.12

PAINTED TIMBER COMPONENTS IN GOOD CONDITION; CRACKED PAINT ON SEVERAL STINGERS AND FLOOR BEAMS NEAR EAST END. PAINT FAILURE FROM CONNECTION BRACKETS AND HARDWARE FOR TRUSSES AND TOWERS RESULTING IN WIDESPREAD

RUSTING WITH SECTION LOSS, UP TO 1/16".

58.8 2" AND 2-1/2" DIAMETER UTILITY PIPES MOUNTED TO NORTH SIDE OF BRIDGE; HEAVY RUSTING WITH UP TO 1/4" BUILD-UP OF

RUST SCALE AND SECTION LOSS UP TO 1/16" THROUGHOUT PIPES.

59.5 PONDING WATER LOCATED ON L0 CONNECTION FOR NORTH TRUSS.

59.7

59.11

THIS INSPECTION CONSTITUTES FRACTURE CRITICAL INSPECTION.

PROTECTIVE COATING FAILURE FROM MAIN SUSPENSION AND SWAY CABLE SYSTEMS RESULTING IN WIDESPREAD RUSTING WITH SECTION LOSS, UP TO 1/16", FROM CABLES AND CONNECTIONS. NOTICEABLE ROTATION DOWNWARD FOR SOUTH SWAY CABLE CONNECTION FOR FLOOR BEAM #18 WHEN COMPARED TO IMAGES FROM 2021 INSPECTION REPORT; MEASURED 26.4°

FROM HORIZONTAL.

ENDS OF MAIN CABLE ANCHORAGES COVERED WITH PVC PIPE AND RUBBER GASKETS.

59.9 SLIGHT DEFLECTION AND MOVEMENT OF SUPERSTRUCTURE UNDER FOOT TRAFFIC AND WIND LOADING COMBINATION.

60.11 ROCK FALL CABLES INSTALLED ON WEST SLOPE.

60.12 BIRD CONTROL SPIKES INSTALLED ON TOP OF BOTH TOWERS.

222.1 MODERATE SPALLING, UP TO 6' LONG X FULL HEIGHT X 9" WIDE, WITH EXPOSED REBAR ALONG NORTH SIDE OF WEST APPROACH SLAB. MODERATE DIAGONAL AND MAP CRACKING, UP TO 1/4" WIDE, BETWEEN APPROACH SLAB AND RETAINING WALL, THROUGHOUT FASCIA. MODERATE SPALLING, 29" LONG X FULL HEIGHT X 4" DEEP, WITH EXPOSED REBAR AT NORTHEAST CORNER OF WEST APPROACH SLAB. MODERATE CRACKNG AND MINOR SPALLING ALONG SOUTH EDGE OF WEST

APPROACH SLAB.

TIMBER FORMWORK REMAINS IN PLACE AT WEST APPROACH SLAB UNDERSIDE.

222.3 METAL HANDRAIL WITH BOX WIRE ATTACHED TO HANDRAIL AT WEST APPROACH; HEAVY RUSTING WITH SECTION LOSS FROM

BOX WIRE. TREX COMPOSITE RAIL SYSTEM INSTALLED AT EAST APPROACH.

222.7 "MAXIMUM VISITORS BEYOND THIS POINT - 49" SIGN MOUNTED TO NORTHEAST LEG OF EAST TOWER. CAUTION TAPE AND

BARRICADE WITH " DANGER - BRIDGE CLOSED - DO NOT ENTER" SIGN AT EAST APPROACH.

223.1

223.4

MODERATE EROSION WITH UNDERMINING, 15' LONG X 12" HIGH X UP TO 18" UNDER, OF NORTH RETAINING WALL AT WEST

APPROACH; MODERATE HORIZONTAL AND VERTICAL CRACKING OF RETAINING WALL.

STRUCTURE LOAD RATING STRUCTURE NO. 8140-006T

TRUCK TYPE

INVENTORY RATING (NORMAL TRAFFIC) OPERATING RATING (MAXIMUM LOAD)

TONS METRIC TONS TONS METRIC TONS

H 0 0

HS 0 0

TYPE 3 0 0

TYPE 3S2 0 0

TYPE 3-3 0 0

DESIGN LOADING: 7 - PEDESTRIAN

CAPACITY MEETS OR EXCEEDS DESIGN LOAD

X CAPACITY IS LESS THAN DESIGN LOAD

ORIGINAL LOAD RATING CALCULATION APPLICABLE

ORIGINAL LOAD RATING CALCULATION REVISED

DATE OF LOAD RATING CALCULATION:

LOAD RATING CONTROLLED BY:

REMARKS: BRIDGE IS CURRENTLY CLOSED TO PUBLIC.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 8140-006T

STRUCTURE IDENTIFICATION

(1) STATE:............................................ 069 - CALIFORNIA

(2) STATE HWY. AGENCY DIST:

(201) PARK: GOLDEN GATE NATIONAL RECREATION AREA

(202) STRUCTURE NAME:..............POINT BONITA SUSPENSION BRIDGE

(203) STRUCTURE KIND:............... 4 - TRAIL BRIDGE

(204) STRUCTURE NUMBER:.........8140-006 T

6 - PACIFIC WEST(205) NPS REGION:

(206) ROUTE CODE NUMBER:

(207) ROAD SECTION NO:

(208) NPS ROAD CLASS:............... 6 - RESTRICTED

(209) WITHIN NPS BNDRY?:.......... Yes

(210) OPERATING UNIT:.................PARK

(211) PROJECT NO(S):................... UNKNOWN

(212) DRAWING NUMBERS:...........D1776

(21) MAINTAINED BY:......................66 - NATIONAL PARK SERVICE

(22) OWNER:................................... 60 - OTHER FEDERAL AGENCIES

(NOT LISTED BELOW)

(3) COUNTY CODE:

(4) CITY / PLACE CODE:

(5) INVENTORY ROUTE:

(6) FEATURES INTERSECTED:

(7) FACILITY CARRIED:

(8) STATE STRUCTURE NO:

(9) LOCATION:

(10) INV. RTE. - MIN. VERT. CLR:

(11) MILE POINT:

(27) YEAR BUILT:

(106) YEAR RECONSTRUCTED:

(20) TOLL:

(37) HISTORIC DESIGNATION:

06041 MARIN

00000

1 6 0 00000 0

INLET

POINT BONITA TRAIL

8140006T0000000

Point Bonita Lighthouse. Key required for access at Structure No. 8140-011T.

6.00 FT ( 1.83 M)

0 (KM PT: 0 )

3 - ON FREE ROAD

2 - ELIGIBLE FOR NATIONAL

REGISTER

STRUCTURE DESCRIPTION, FOUNDATION, AND DECK TYPE

(43A) MAIN STR. MATERIAL:..........7 - WOOD OR TIMBER (44A) APPR. STR. MATERIAL:............ 0 - Other

(43B) MAIN STR. TYPE:.................. 13 - SUSPENSION (44B) APPR. STR. TYPE:.................... 01 - SLAB

(45) NO. OF MAIN SPANS:..............1 (46) NO OF APPROACH SPANS:

(48) MAX. SPAN LENGTH:..............156 FT ( 47.5 M)

(49) STRUCTURE LENGTH:........... 156. FT ( 47.5 M) (108) WEAR SURFACE/PROTECT SYSTEM:

(216A) ABUTMENT #1 FDN:........... 2 - SPREAD FTG ON BEARING MAT'L A) TYPE WEARING SURFACE:.. 0 - NONE

(216B) ABUTMENT #2 FDN:........... 2 - SPREAD FTG ON BEARING MAT'L B) TYPE MEMBRANE:................. 0 - NONE

(217A) PREDOM. PIER FDN:.......... 6 - N/A C) TYPE PROTECTION:.............. 0 - NONE

(217B) SECOND. PIER FDN:.......... 6 - N/A (218) IS SALT USED?.......................... NO

(107) DECK TYPE:.......................... 8 - WOOD OR TIMBER

LOAD RATING AND POSTING

(31) DESIGN LOAD:.........................7 - PEDESTRIAN (41) LOAD RESTRICTION:.................. K - CLOSED

(66) INVENTORY RATING:.............. METRIC TONS) (70) BRIDGE POSTING:...................... 0 - MORE THAN 39.9% BELOW LEGALTONS ( 0

LOADS (0 TONS)

(64) OPERATING RATING:.............. TONS ( 0 METRIC TONS)

INSPECTION DATES

(90) INSPECTION DATE: 10/23/2024 (91) FREQ. OF INSP: 6 MONTHS (92 / 93) CRITICAL FEATURE INSPECTION (CFI):

(219) ADD. STUDIES NEEDED: N - 0 - NONE (A) FRACTURE CRITICAL:.......... Y

(220) SPECIAL STUDY TYPE: 0 - NONE INSP. EVERY 6 MONTHS - LAST INSP: 10/23/2024

(221) SPECIAL STUDY DATE: (B) UNDERWATER:..................... N

INSP. EVERY MONTHS - LAST INSP:

(C) SPECIAL INSPECTION:........ N

INSP. EVERY MONTHS - LAST INSP:

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 8140-006T

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(16) LATITUDE:................................ 37° 48'58.00" (51) CURB TO CURB WIDTH:............ 4.2 FT ( 1.3 M)

(17) LONGITUDE:............................122°31 '43.20" (52) DECK WIDTH:.......................... 4.5 FT ( 1.4 M)

(19) DETOUR LENGTH:.................. 199 MI ( 199 KM) (32) APPR. ROADWAY WIDTH:...... 6.0 FT ( 1.8 M)

(28A) LANES ON STRUCT:.............01 (213) APPR. PAVEMENT WIDTH:... 6.0 FT ( 1.8 M)

(28B) LANES UNDER STRUCT:......00 LEFT SHOULDER:............... FT ( 0 M)

(42A) SERVICE ON:.........................3 - PEDESTRIAN-BICYCLE RIGHT SHOULDER:.......... FT ( 0 M)

(42B) SERVICE UNDER:................. 0 - OTHER (33) BRIDGE MEDIAN:.................... 0 - NO MEDIAN

(29) AVG DAILY TRAFFIC:..............0 (34) SKEW ANGLE:......................... 0 °

(30) YEAR OF ADT:......................... 2008 (35) STRUCTURE FLARED:............ 0 - NO FLARE

(114) FUTURE ADT:.........................0 (47) TOTAL HORIZ. CLEARANCE:.. 4.2 FT ( 1.3 M)

(115) YEAR OF FUTURE ADT:........2028 (50) CURB OR SIDEWALK WIDTHS:

(101) PARALLEL STRUCTURE:......N - NO PARALLEL STRUCTURE LEFT:.................................... 0.0 FT ( 0 M)

(38) NAVIGATION CONTROL:.........0 RIGHT:.................................. 0.0 FT ( 0 M)

(39) VERTICAL CLEARANCE:.........0 FT ( 0 M) (214) BRIDGE RAIL TYPE

(40) HORIZ. CLEARANCE:..............0 FT ( 0 M) RAIL CONFIGURATION:...... 1 - FULL HEIGHT (NO PARAPET)

(111) ABUT OR PIER PROT:........... MATERIAL:........................... 7 - TIMBER

LATERAL UNDERCLEARANCE: DESIGN TYPE:..................... 3 - SIMPLE RAIL (JOINTS AT EACH

POST)

(55) RIGHT:..............................99.90 FT ( 30.45 M) (215) BRIDGE RAIL HEIGHT:.......... 4.38 FT ( 1.34 M)

(56) LEFT:.................................0 FT ( 0 M) (53) MIN. VRT. CLR. OVER DECK: 8.00 FT ( 2.44 M)

(54) MIN. VRT. UNDRCLRANCE:... .00 FT ( 0 M)

CONDITION AND APPRAISAL DATA, PROPOSED IMPROVEMENTS, AND COST

(58) DECK:....................................... 7 (67) STRUCTURAL EVALUATION:

(59) SUPERSTRUCTURE:...............4 (68) DECK GEOMETRY:

(60) SUBSTRUCTURE:.......... 5 (69) UNDERCLEARANCES:................ N

(61) CHANNEL:................................7 (71) WATERWAY ADEQUACY:........... N

(62) CULVERT:.................................N (72) APPROACH ALIGNMENT:

(222) APPROACHES:...................... 5 (113) SCOUR CRITICAL:.................... N - NOT OVER WATERWAY

(223) RETAINING WALL:.................5 (225) PURPOSE OF IMPROVEMENT: 2 - REHAB/RECONSTRUCTION

(36) TRAFFIC SAFETY FEAT: N N N N (226) PRIORITY OF IMPROVEMENT: B - MAJOR

(75A) TYPE OF WORK:................... (227) MAINTENANCE COST:.............$ 0

(75B) WORK DONE BY:.................. (228) REHAB / RECNSTR COST:..... $ 2250000

(76) IMPROVEMENT LENGTH:....... FT ( 0 M) (229) CONSTRUCTION COST:.......... $ 0

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

2012-BRIDGE REPLACED.

(231) ADDITIONAL CONSIDERATIONS:

KEYS REQUIRED FOR ACCESS AT TRAILHEAD AND AT STRUCTURE NO. 8140-011T; FP KEY.

(330) ADDITIONAL CONFIGURATION INFORMATION:

https://RIGHT:

https://48'58.00

Inspector: Matt Burnett Structure Number: 8140006T0000000

Inspection Date: 10/23/2024 Facility Carried: POINT BONITA TRAIL

Trail Bridge Inspection Report

Pictures

PHOTO 3

Description LOOKING WEST TOWARD LIGHTHOUSE

PHOTO 4

Description SOUTH SIDE

Trail Bridge Inspection Report

Pictures

PHOTO 5

Description GENERAL TOP SIDE VIEW LOOKING EAST

PHOTO 6

Description GENERAL UNDERSIDE VIEW LOOKING EAST

Trail Bridge Inspection Report

Pictures

PHOTO 7

Description GENERAL VIEW OF WEST APPROACH

PHOTO 8

Description TYPICAL RUSTING WITH SECTION LOSS FROM HANDRAIL BOX WIRE AT WEST APPROACH

Trail Bridge Inspection Report

Pictures

PHOTO 9

Description EROSION WITH UNDERMINING ALONG NORTH RETAINING WALL AT WEST APPROACH;

NOTE CRACKING OF RETAINING WALL

PHOTO 10

Description CRACKING ON TOP FACE OF NORTH RETAINING WALL AT WEST APPROACH

Trail Bridge Inspection Report

Pictures

PHOTO 11

Description SPALLING WITH EXPOSED REBAR AT NORTH SIDE OF WEST APPROACH SLAB; NOTE

ABANDONED UTILITY WITH SECTION LOSS

PHOTO 12

Description GENERAL VIEW OF SOUTHWEST MAIN SUSPENSION CABLE ANCHORAGE; NOTE

ANCORAGE COVERED WITH PVC PIPE AND RUBBER GASKET

Trail Bridge Inspection Report

Pictures

PHOTO 13

Description TYPICAL CONDITION OF SWAY CABLE ANCHORAGES, SOUTHWEST ANCHORAGE SHOWN;

NOTE PAINT FAILURE AND RUSTING

PHOTO 14

Description GENERAL VIEW OF WEST TOWER

Trail Bridge Inspection Report

Pictures

PHOTO 15

Description TYPICAL PAINT FAILURE WITH SECTION LOSS FROM TOWER CONNECTION BRACKETS

AND HARDWARE, NORTHWEST LEG FOR WEST TOWER SHOWN

PHOTO 16

Description PONDING WATER ON L0 CONNECTION FOR NORTH TRUSS

Trail Bridge Inspection Report

Pictures

PHOTO 17

Description TYPICAL PAINT FAILURE WITH SECTION LOSS FROM TRUSS CONNECTION BRACKETS

AND HARWARE, U1 CONNECTION FOR NORTH TRUSS SHOWN

PHOTO 18

Description TYPICAL BROKEN AND DISPLACED SECTION OF NON-SKID TREADS ON DECK, NEAR

WEST END SHOWN

Trail Bridge Inspection Report

Pictures

PHOTO 19

Description TYPICAL DETERIORATION ON NON-SKID COATING ON DECK PLANKS

PHOTO 20

Description TYPICAL PROTECTIVE COATING FAILURE FROM VERTICAL SUSPENSION CABLES, NORTH

CABLE FOR FLOOR BEAM #6 SHOWN; NOTE RUSTING

Trail Bridge Inspection Report

Pictures

PHOTO 21

Description TYPICAL CONDITION OF SWAY CABLE CONNECTIONS, SOUTH CONNECTION FOR FLOOR

BEAM #8 SHOWN; NOTE PAINT FAILURE WITH RUSTING AND SECTION LOSS

PHOTO 22

Description TYPICAL PROTECTIVE COATING FAILURE FROM MAIN SUSPENSION CABLES, NORTH

SUSPENSION CABLE ABOVE FLOOR BEAM #9 SHOWN; NOTE RUSTING

Trail Bridge Inspection Report

Pictures

PHOTO 23

Description TYPICAL RUST STAINING ON TRUSS MEMBERS FROM HORIZONTAL RAILING CABLE

BRACKETS, MEMBER U12-L12 FOR SOUTH TRUSS SHOWN

PHOTO 24

Description AREA OF REMOVED PROTECTIVE COATING TO EXPOSE NORTH MAIN SUSPENSION

CABLE OVER FLOOR BEAM #15; NOTE SECTION LOSS FROM CABLE

Trail Bridge Inspection Report

Pictures

PHOTO 25

Description TYPICAL PROTECTIVE COATING FAILURE FROM MAIN SUSPENSION CABLES, SOUTH

SUSPENSION CABLE OVER FLOOR BEAM #18 SHOWN

PHOTO 26

Description TYPICAL PROTECTIVE COATING FAILURE FROM VERTICAL SUSPENSION CABLES, NORTH

CABLE FOR FLOOR BEAM #20 SHOWN; NOTE RUSTING

Trail Bridge Inspection Report

Pictures

PHOTO 27

Description TYPICAL PAINT FAILURE WITH SECTION LOSS FROM TRUSS CONNECTION BRACKETS

AND HARWARE, U25 CONNECTION FOR SOUTH TRUSS SHOWN

PHOTO 28

Description TYPICAL RUSTING WITH SECTION LOSS FROM UTILITY PIPE ALONG NORTH SIDE OF

BRIDGE, NEAR EAST END SHOWN

Trail Bridge Inspection Report

Pictures

PHOTO 29

Description DOWNWARD ROTATION OF SOUTH SWAY CABLE CONNECTION FOR FLOOR BEAM #18

PHOTO 30

Description GENERAL VIEW OF NORTHWEST WEST MAIN SUSPENSION AND SWAY CABLE

ANCHORAGES; NOTE MAIN SUSPENSION CABLE ANCORAGE COVERED WITH PVC PIPE

AND RUBBER GASKET

Trail Bridge Inspection Report

Pictures

PHOTO 31

Description GENERAL VIEW OF EAST TOWER

PHOTO 32

Description TYPICAL PAINT FAILURE WITH SECTION LOSS FROM TOWER CONNECTION BRACKETS

AND HARDWARE, NORTHWEST LEG FOR EAST TOWER SHOWN

Trail Bridge Inspection Report

Pictures

PHOTO 33

Description TYPICAL CONDITION OF MAIN SUSPENSION CABLE SADDLES, SOUTH SADDLE FOR EAST

TOWER SHOWN

PHOTO 34

Description GENERAL VIEW OF EAST APPROACH

Trail Bridge Inspection Report

Pictures

PHOTO 35

Description GENERAL VIEW OF EAST MAIN SUSPENSION CABLE ANCHORAGES

PHOTO 36

Description TYPICAL PROTECTIVE COATING FAILURE FROM MAIN SUSPENSION CABLES, NORTH

CABLE AT EAST ANCHORAGE SHOWN; NOTE RUSTING WITH SECTION LOSS

Trail Bridge Inspection Report

Pictures

PHOTO 37

Description OCCUPANCY SIGNAGE MOUNTED TO NORTHEAST LEG OF EAST TOWER

PHOTO 38

Description GENERAL VIEW OF WEST BEARING

Trail Bridge Inspection Report

Pictures

PHOTO 39

Description PROTECTIVE PAINT FAILURE FROM SWAY CABLE STRUT AT L0; NOTE RUSTING OF STRUT

PHOTO 40

Description TYPICAL SECTION LOSS FROM VERTICAL SUSPENSION CABLES ADJACENT TO CRIMPS, SOUTH CABLE FOR FLOOR BEAM #2 SHOWN

Trail Bridge Inspection Report

Pictures

PHOTO 41

Description TYPICAL CONDITION OF LOWER LATER BRACING, WEST END OF FLOOR BEAM #5

SHOWN; NOTE PAINT FAILURE WITH RUSTING AND SECTION LOSS

PHOTO 42

Description TYPICAL CONDITION OF SWAY CABLE CLAMPS, NORTH CLAMP AT FLOOR BEAM #6

SHOWN; NOTE PAINT FAILURE WITH RUSTING AND SECTION LOSS

Trail Bridge Inspection Report

Pictures

PHOTO 43

Description TYPICAL PAINT FAILURE WITH RUSTING AND SECTION LOSS FROM VERTICAL

SUSPENSION RODS, NORTH ROD AT FLOOR BEAM #15 SHOWN

PHOTO 44

Description TYPICAL LICHEN GROWTH ON UNDERSIDE OF BRIDGE, FLOOR BEAM #17 SHOWN

Trail Bridge Inspection Report

Pictures

PHOTO 45

Description TYPICAL PROTECTIVE COATING FAILURE FROM SWAY CABLES, SOUTH SWAY CABLE

APPROXIMATLEY 15’ FROM SOUTHEAST ANCHORAGE SHOWN; NOTE SECTION LOSS

FROM CABLE

PHOTO 46

Description GENERAL VIEW OF EAST BEARING

Trail Bridge Inspection Report

Pictures

PHOTO 47

Description LOOKING NORTH FROM DECK

PHOTO 48

Description LOOKING SOUTH FROM DECK