B08_Attachment_05_Bridige_Assessment_FHWC_2021.pdf

BRIDGE INSPECTION REPORT

POINT BONITA SUSPENSION BRIDGE

POINT BONITA TRAIL OVER INLET

GOLDEN GATE NATIONAL RECREATION AREA

LW

STRUCTURE NO. 8140-006T

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 8/31/2021

SS

Report prepared by:

Federal Highway Administration Federal Lands Bridge Office Bridge Inspection and Management Program 21400 Ridgetop Circle Sterling, Virginia 20166 https://bridge.flhd.fhwa.dot.gov https://bridge.flhd.fhwa.dot.gov

STRUCTURE SUMMARY STRUCTURE NO. 8140-006T

POINT BONITA SUSPENSION BRIDGE INSPECTION DATE: 08/31/2021

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: .. (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: B. Kamrath, S. Marks

CONDITION ASSESSMENT:

Beau Kamrath

REPORT REVIEW:

Marcus Miller

REPORT APPROVAL: Date: 11/02/2021

Jorgomai Ceesay

STRUCTURE EVALUATION SUMMARY

This timber suspension trail bridge is in satisfactory condition overall. The main problem is heavy salt deposit build up and minor to moderate surface corrosion throughout on the main suspension and wind (sway) cable systems and connection hardware. Other problems include moderate erosion and undermining of the northwest retaining wall, with some moderate cracking of the wall visible above this area and moderate spalling with exposed rebar along the north side of the west approach slab.

Corrective measures 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 : 08/31/2021

PRIORITY OF IMPROVEMENT226

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 hazzard, 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.

D

Item No.

Maintenance Recomendations

(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

223.1, 223.4

REPAIR AREA OF UNDERMINING AT

NORTHWEST RETAINING WALL. CLEAN AND

EPOXY INJECT CRACKING OF WALL ABOVE

AREA OF UNDERMINING.

1 LS 5000 5000

222.1 CLEAN AND SEAL EXPOSED REBAR ON WEST

APPROACH SLAB (AT RETAINING WALL) WITH

APPROVED PROTECTIVE COATING.

1 LS 4000 4000

59.7,59.

CLEAN CORROSION AND SALT DEPOSIT BUILD-

UP FROM CABLES. APPLY CORROSION

PROTECTION SYSTEM TO CABLES AND

CONNECTION HARDWARE.

1 LS 20000 20000

CONTRACT COSTS FOR MOBILIZATION,

TRAFFIC CONTROL, DESIGN, AND

CONSTRUCTION ENGINEERING.

1 LS 21000 21000

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL : 50000

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL :

PRELIM. REHABILITATION TOTAL :

PRELIM. RECONSTRUCTION TOTAL : .. 0

TOTAL 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 : Cost estimates assume that recommended actions will be combined with similar work being performed on other structures.

FIELD INSPECTION REPORT STRUCTURE NO. 8140-006T

POINT BONITA SUSPENSION BRIDGE INSPECTION DATE: 08/30/2021

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

G

F

N

G

G

F

G

G

N

G

N

1- SUFF

1 - HIGH

F

N

G

G

G

G

G

N

F

N

N

F

G

N

2. EXPANSION JOINTS N

3. WEARING SURFACE G

F

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

FA R 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.

“ MM NENT” FA LURE CONDITION - major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability.

Structure is closed to

FA LED CONDITION - out of service; beyond corrective action. 0

ROCK

ELECTRIC LINE

ABUTMENTS

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 N

12.OTHER TOWERS G

36. TRAFFIC AND SAFETY FEATURES

A. BRIDGE RAILINGS:

B. TRANSITIONS:

C. APPROACH GUARDRAILS:

D. APPROACH GUARDRAIL ENDS:

N

N

N

N

PIER(S) TRAFFIC SAFETY RATING CODES

13. WALLS AND/OR COLUMNS N

N

N

N

N

N

N

0 - Does not meet standards or a safety features is 14.PILE BENTS required and none is provided.

15.CAPS AND/OR BEARING SEATS

1 - Meets currently acceptable standards.

16.FOUNDATIONS

17.EROSION AND/OR SCOUR N - Not applicable or a safety features is not required.

18.SETTLEMENT OR DEFLECTION

19.OTHER

FIELD INSPECTION REPORT STRUCTURE NO. 8140-006T

ITEM REFERENCE AND REMARKS

58.3 ISOLATED AREAS OF DECK PAINT WORN OFF TIMBER PLANKS. LICHEN GROWTH ALONG EDGES OF TIMBER PLANKS.

58.6

59.5

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

CABLES.

58.6

59.7

60.12

PAINTED TIMBER COMPONENTS IN GOOD CONDITION. MINOR CORROSION OF CONNECTION HARDWARE FOR TIMBER

COMPONENTS.

58.8 2" AND 2-1/2" DIAMETER UTILITY PIPES MOUNTED ON NORTH SIDE OF BRIDGE; MODERATE SURFACE RUSTING WITH NO

MEASURABLE LOSS OF SECTION OF UTILITY PIPES THROUGHOUT.

59.4

59.7

CRACKED PAINT ON SEVERAL FLOOR BEAMS NEAR EAST END. LICHEN GROWTH AND MOISTURE STAINING ON FLOOR BEAMS

AND STRINGERS.

59.7

59.11

PAINTED MAIN SUSPENSION AND WIND (SWAY) CABLE SYSTEMS AND CONNECTION HARDWARE HAVE AREAS OF MINOR TO MODERATE SURFACE CORROSION THROUGHOUT. HEAVY SALT DEPOSITS BUILD-UP ON ALL CABLES.

MAIN SPAN SUSPENSION CABLES & WIND (SWAY) CABLES & VERTICAL SUSPENSION CABLES COATED WITH CORROSION INHIBITOR. ALL ENDS OF MAIN CABLE ANCHORAGES ARE COVERED WITH PVC PIPE AND RUBBER GASKETS.

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

60.12 BIRD CONTROL SPIKES 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 1/32" WIDE (PREVIOUSLY 1/4" WIDE), BETWEEN APPROACH SLAB AND SUPPORT 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 WIRE MESH ATTACHED TO HANDRAIL AT WEST APPROACH. TREX COMPOSITE RAIL SYSTEM INSTALLED

AT EAST APPROACH.

MODERATE CORROSION WITH AREAS OF FLAKING RUST ON WIRE MESH AT WEST APPROACH.

222.7 "MAXIMUM VISITORS BEYOND THIS POINT 49" SIGN MOUNTED TO NORTH LEG OF EAST TOWER.

223.1

223.4

MODERATE EROSION HAS RESULTED IN UNDERMINING OF NORTH RETAINING WALL AT WEST APPROACH (APPROXIMATELY 15' LONG X 1' HIGH X UP TO 1.5' DEEP). MODERATE HORIZONTAL AND VERTICAL CRACKING ALONG NORTH SIDE OF RETAINING

WALL OVER UNDERMINED AREA.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 8140-006T

STRUCTURE IDENTIFICATION

(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)

(1) STATE:

(2) STATE HWY. AGENCY DIST:

(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:

069 - CALIFORNIA

01041 CRENSHAW

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)

(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: 08/31/2021 (91) FREQ. OF INSP: 24 MONTHS (92 / 93) CRITICAL FEATURE INSPECTION (CFI):

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

(220) SPECIAL STUDY TYPE: 4 - NON-DESTRUCTIVE TESTING INSP. EVERY 12 MONTHS - LAST INSP: 08/08/2018

(221) SPECIAL STUDY DATE: 10/01/2000 (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) SIDEWALKS

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

(38) NAVIGATION CONTROL:.........0 - NO NAVIGATION CONTROL ON RIGHT:.................................. 0 0 FT ( 0 M)

WATERWAY (BRIDGE PERMIT NOT

REQUIRED)

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

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

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

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:...............6 (68) DECK GEOMETRY:

(60) SUBSTRUCTURE:.......... 7 (69) UNDERCLEARANCES:................ N

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

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

(222) APPROACHES:...................... 6 (113) SCOUR CRITICAL:.................... N - NOT OVER WATERWAY

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

(36) TRAFFIC SAFETY FEAT: N N N N (226) PRIORITY OF IMPROVEMENT: D - MINOR

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

(75B) WORK DONE BY:.................. (228) REHAB / RECNSTR COST:..... $ 50000

(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:

Inspector: Beau Kamrath Structure Number: 8140006T0000000

Inpsection Date: 08/31/2021 Facility Carried: POINT BONITA TRAIL

Trail Bridge Inspection Report

Pictures

PHOTO 3

Description LOOKING EAST TOWARD INTERPRETIVE AREA

PHOTO 4

Description NORTH SIDE

Trail Bridge Inspection Report

Pictures

PHOTO 5

Description GENERAL TOPSIDE VIEW LOOKING WEST

PHOTO 6

Description GENERAL UNDERSIDE VIEW LOOKING EAST

Trail Bridge Inspection Report

Pictures

PHOTO 7

Description TYPICAL CONDITION OF DECK SURFACE; NOTE LICHEN GROWTH

PHOTO 8

Description SUSPENSION CABLE AND SWAY ANCHORAGES AT NORTHWEST CORNER

Trail Bridge Inspection Report

Pictures

PHOTO 9

Description SUSPENSION CABLE ANCHORAGE AT SOUTHWEST CORNER

PHOTO 10

Description TOWER LEG ANCHORAGE AT SOUTHWEST CORNER OF WEST TOWER; NOTE

CORROSION OF CONNECTION PLATE

Trail Bridge Inspection Report

Pictures

PHOTO 11

Description STIFFENING TRUSS CONNECTION PLATES AND HARDWARE, SOUTH TRUSS NEAR WEST

END SHOWN; NOTE CORROSION OF STEEL

PHOTO 12

Description TYPICAL CONNECTION HARDWARE FOR TIMBER COMPONENTS, SOUTHWEST CORNER

OF WEST TOWER SHOWN

Trail Bridge Inspection Report

Pictures

PHOTO 13

Description GENERAL VIEW OF WEST ABUTMENT

PHOTO 14

Description ROCKFALL CABLES INSTALLED AT WEST END OF STRUCTURE

Trail Bridge Inspection Report

Pictures

PHOTO 15

Description SWAY CABLE CONNECTION TO STIFFENING TRUSS; NOTE CORROSION OF CABLE AND

FITTINGS

PHOTO 16

Description UTILITY LINES ON NORTH SIDE OF STIFFENING TRUSS; NOTE CORROSION

Trail Bridge Inspection Report

Pictures

PHOTO 17

Description VERTICAL HANGER CONNECTION TO MAIN NORTH SUSPENSION CABLE; NOTE

CORROSION OF MAIN SUSPENSION CABLE, FITTINGS, AND VERTICAL HANGER

PHOTO 18

Description MAIN NORTH SUSPENSION CABLE NEAR MIDSPAN; NOTE CORROSION

Trail Bridge Inspection Report

Pictures

PHOTO 19

Description CLOSE-UP OF PREVIOUS PHOTO; NOTE CORROSION AND SALT BUILD-UP

PHOTO 20

Description TYPICAL LICHEN GROWTH ON STRINGERS, CENTER STRINGER NEAR MIDSPAN SHOWN

Trail Bridge Inspection Report

Pictures

PHOTO 21

Description TYPICAL MOISTURE STAINING AND LICHEN GROWTH ON FLOOR BEAMS, FOURTH FLOOR

BEAM FROM WEST END SHOWN

PHOTO 22

Description MAIN SUSPENSION CABLE ANCHORAGE AT EAST END OF BRIDGE

Trail Bridge Inspection Report

Pictures

PHOTO 23

Description GENERAL VIEW OF EAST ABUTMENT

PHOTO 24

Description SWAY CABLE CONNECTION TO STIFFENING TRUSS; NOTE CORROSION OF CABLE AND

FITTINGS

Trail Bridge Inspection Report

Pictures

PHOTO 25

Description EAST APPROACH

PHOTO 26

Description WEST APPROACH

Trail Bridge Inspection Report

Pictures

PHOTO 27

Description SPALL WITH EXPOSED REINFORCING AT NORTH SIDE OF WEST APPROACH SLAB

PHOTO 28

Description ABANDONED UTILITY CONDUIT AT NORTH SIDE OF WEST APPROACH; NOTE CORROSION

AND SECTION LOSS

Trail Bridge Inspection Report

Pictures

PHOTO 29

Description VIEW FROM BRIDGE LOOKING SOUTH

PHOTO 30

Description VIEW FROM BRIDGE LOOKING NORTH