Bridge_Inspection_Report.pdf

BRIDGE INSPECTION REPORT

BIG SLACKWATER BRIDGE

DAM #4 ROAD OVER C&O CANAL

C&O CANAL NATIONAL HISTORICAL PARK

LN

STRUCTURE NO. 3100-008P

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 10/26/11

Report prepared by: ED

Federal Highway Administration Federal Lands Bridge Office Bridge Inspection and Management Program 21400 Ridgetop Circle Sterling, Virginia 20166 http://www.efl.fhwa.dot.gov/FLHBO/BIP http://www.efl.fhwa.dot.gov/FLHBO/BIP

STRUCTURE SUMMARY STRUCTURE NO. 3100-008P

BIG SLACKWATER BRIDGE INSPECTION DATE: 10/26/11

BRIDGE IDENTIFICATION AND DESCRIPTION

MAIN SPAN MATERIAL: ....... STEEL NO. OF MAIN SPANS:

MAIN SPAN TYPE: ............... NO. OF APPR. SPANS: ........ GIRDER & FLOOR BEAM SYSTEM 0

# OF BEAMS, MAIN SPAN: .. 4 STRUCT. TOTAL LENGTH: .. 55.0 FT (16.8 M)

DECK TYPE: ......................... WOOD OR TIMBER MAX. SPAN LENGTH: .......... 54.3 FT (16.6 M)

WEARING SURFACE: .......... NONE DECK WIDTH: ...................... 22.1 FT (6.7 M)

ABUT. FOUNDATIONS: ........ UNKNOWN CURB TO CURB WIDTH: ..... 20.1 FT (6.1 M)

PIER FOUNDATION(S): ........ N/A YEAR BUILT:

ABUTMENT / PIER MAT'L: ... CONCRETE YEAR RECONSTRUCTED: .. 1977

PROJ./PLAN REF. NO: ......... 000000000000 / NONE SKEW ANGLE: ..................... 32 °

NPS ROAD CLASS: .............. 2 - CONNECTOR ROAD FRACTURE CRITICAL: ........ NO

STRUCTURE HISTORY: ...... 1977-MAJOR RECONSTRUCTION/SUPERSTRUCTURE. 1992-DECK PLANKS REPLACED.

1994-STRUCTURE REPAINTED.

LOCATION

C&O CANAL NATIONAL HISTORICAL PARK MILE POINT: ..................... 84.30 (KM PT 135.66)

STATE: ................................. MARYLAND LOCATION: 0.9 miles from Dam #4 on Dam #4 Road, off MD Route 63. FACILITY CARRIED: ............ DAM #4 ROAD

FEATURE INTERSECTED: .. C&O CANAL

STRUCTURE EVALUATION SUMMARY

This steel multi-beam and floor beam bridge is in fair condition overall. The main problem is widespread deterioration of the paint and rusting of the structural steel, which if not repainted, could lead to section loss and eventual reduction in the load-carrying capacity of the structure. Additionally, the timber deck planks have minor to moderate decay and numerous deck planks are loose.

Other problems include an accumulation of leaves on the deck surface in the curblines, minor settlement of the approach pavement with pavement broken up along the abutment backwalls, and heavy vegetation growth at the corners of the structure. Also, the south abutment wingwalls are out of plane with the breastwall, but the condition appears to be as-built and will continue to be monitored during subsequent inspections. Repairs should be made as outlined in this report to prevent the possible development of more serious or costly problems in the future.

INSPECTION TEAM: M.D. HARLAN, A.D. MITCHEM (CLARK NEXSEN)

CONDITION ASSESSMENT:

MATTHEW D. HARLAN, P.E., FIELD TEAM LEADER

REPORT REVIEW:

GARY J. GOODLIN, FIELD TEAM LEADER 703-404-6253

REPORT APPROVAL: DATE: 2/28/12

MARCUS MILLER, P.E., LEAD STRUCTURAL ENGINEER 703-404-6252

RECOMMENDATIONS AND ESTIMATED COSTS STRUCTURE NO. 3100-008P

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

B (Major) - Structure is seriously deficient or presents a safety hazard, but can remain in service 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. Preventative maintenance may be required.

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

D226 PRIORITY OF IMPROVEMENT

ITEM

NO.

MAINTENANCE RECOMMENDATIONS

(GENERALLY NOT FLHP ELIGIBLE)

QTY. UNIT COST

UNIT

ESTIMATE

COST

PRELIM.

58.1 SECURE LOOSE TIMBER DECK PLANKS WITH SCREWS. 1 LS

61.4 REMOVE FLOOD DEBRIS FROM CHANNEL. 1 LS

222.3 REPLACE MISSING SECTION OF TIMBER APPROACH GUARDRAIL. 10 LF

222.4 SEAL APPROACH PAVEMENT ALONG ABUTMENT BACKWALLS. 44 LF

58.7, 60.3,6 REMOVE DEBRIS FROM DECK SURFACE AND ABUTMENT BEARING SEATS.

REMOVE VEGETATION GROWTH FROM CORNERS OF STRUCTURE AND EAST

WINGWALLS.

1 LS

58.5 REPLACE MISSING NUTS AND SHORT BOLT ON EAST CURB. 1 LS

PRELIM. MAINTENANCE TOTAL :

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS)

QTY. UNIT

UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

59.2,4,6,7 CLEAN AND PAINT STRUCTURAL STEEL. 2,000 SF

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL : $0

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL:

PRELIM. REHABILITATION TOTAL:

PRELIM. RECONSTRUCTION TOTAL: ...

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 preliminary 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. 3100-008P

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

N NOT APPLICABLE

9 EXCELLENT CONDITION

8 VERY GOOD CONDITION - no problems noted.

7 GOOD CONDITION - some minor problems.

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.

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

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.

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 structure until corrective action can be taken.

1 “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 traffic but corrective action may return structure to light service.

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

CONDITION RATING CODE EQUIVALENTS FOR SUB-ELEMENTS

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

58. DECK 6

1. DECK SLAB F

2. EXPANSION JOINTS N

3. WEARING SURFACE N

4. RIDEABILITY F

5. CURBS, SIDEWALKS, AND MEDIAN F

6. PARAPETS AND/OR RAILINGS N

7. DRAINS AND DRAINAGE F

8. UTILITIES N

9. DEFLECTION AND/OR VIBRATION G

10. OTHER N

59. SUPERSTRUCTURE 6

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

ABUTMENTS

1. BREASTWALLS OR COLUMNS

2. PILE BENTS

3. CAPS AND/OR BEARING SEATS

4. BACKWALLS AND/OR BULKHEADS

5. FOUNDATIONS

6. WINGWALLS

7. WEEP HOLES

8. EXPANSION JOINTS

9. EROSION AND/OR SCOUR

10. SETTLEMENT OR DEFLECTION

11. SLOPE PROTECTION

12. OTHER

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

G F N F N N P N F G N

G N G G N G G F G G N N

N N N N N N N

58.1,4

58.5

58.7

59.1

59.2,4,7

59.9

60.1,6

60.3

60.4

ITEM REFERENCE AND REMARKS

WIDESPREAD MINOR TO MODERATE CHECKING AND MINOR DECAY

OF TIMBER DECK PLANKS; MODERATE DECAY IN SOME LOCATIONS.

NUMEROUS DECK PLANKS LOOSE, CAUSING ROUGH RIDE.

FUNGUS GROWTH ON DECK UNDERSIDE NEAR SOUTH ABUTMENT.

MINOR CHECKING OF TIMBER CURBS; MODERATE IN WEST CURB.

ONE NUT MISSING FROM EAST CURB TIE-DOWN BOLT NEAR NORTH

END; ONE BOLT TOO SHORT WITH NUT MISSING NEAR MIDSPAN.

HEAVY ACCUMULATION OF LEAVES IN CURBLINES.

ANCHOR BOLT MISSING FROM BEAM #2 AT SOUTH ABUTMENT.

ELASTOMERIC BEARING PADS OVERHANG FRONT OF SEAT UP TO 2"

X 5"L AT BEAMS #1, #3, AND #4 AT SOUTH ABUTMENT.

WIDESPREAD SEVERE PEELING OF PAINT AND MINOR TO

MODERATE RUSTING OF STRUCTURAL STEEL; NO SECTION LOSS

EVIDENT.

PREVIOUSLY NOTED MINOR SAGGING OF SUPERSTRUCTURE

UNDER LIVE LOAD WAS NOT EVIDENT DURING THIS INSPECTION;

MINOR VIBRATION WAS OBSERVED.

HEAVY VEGETATION GROWTH AT CORNERS OF STRUCTURE.

FORM TIE BOLT THREADS PROTRUDING FROM ABUTMENT

BREASTWALLS AND WINGWALLS. STAINING / MOLD GROWTH ON

ABUTMENT BREASTWALLS. MINOR VEGETATION OVERHANGING

EAST WINGWALLS.

GAP BETWEEN END DECK PLANKS AND ABUTMENT BACKWALLS

ALLOWS DEBRIS TO FALL THROUGH ONTO BEARING SEATS.

MINOR EDGE SPALLING OF TOP OF ABUTMENT BACKWALLS.

FIELD INSPECTION REPORT STRUCTURE NO. 3100-008P

ITEM REFERENCE AND REMARKS

STREAM BED COMPOSITION : 9.

AVERAGE CLEAR OPENING 8.

NORMAL VELOCITY 7.

ADEQUACY OF OPENING 6.

OTHER 5.

WATERWAY OBSTRUCTIONS 4.

CHANNEL PROTECTION 3.

EROSION AND/OR SCOUR 2.

ALIGNMENT 1.

61. CHANNEL 6

F G N F N

LOW

INSUFF

7 FT.

SILT

222. APPROACHES 6

OTHER 9.

ALIGNMENT 8.

SIGNS 7.

SETTLEMENT 6.

EROSION 5.

SURFACING 4.

APPROACH GUARDRAIL 3.

RELIEF JOINTS 2.

1. APPROACH SLABS

(GATE)

N N F F G G G G G

223. RETAINING WALL N

OTHER 6.

SETTLEMENT OR DEFLECTION 5.

EROSION AND/OR SCOUR 4.

FOUNDATION 3.

WEEP HOLES 2.

1. WALL

36. TRAFFIC AND SAFETY FEATURES

APPROACH GUARDRAIL ENDS D.

APPROACH GUARDRAILS C.

TRANSITIONS B.

BRIDGE RAILINGSA. N

N N N

TRAFFIC SAFETY RATING CODES

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

1 - Meets currently acceptable standards.

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

60.8 CRACKING OF NEOPRENE IN VERTICAL EXPANSION JOINTS.

60.9 MINOR EROSION AT ENDS OF WINGWALLS.

60.10 SOUTHWEST WINGWALL OUT OF PLANE WITH BREASTWALL 1"

STREAMWARD FOR FULL HEIGHT. SOUTHEAST WINGWALL OUT OF

PLANE WITH BREASTWALL 1" STREAMWARD AT BOTTOM. BOTH

CONDITIONS APPEAR AS-BUILT.

61.1 CHANNEL STAGNANT AT TIME OF INSPECTION, HOWEVER CHANNEL

FLOWS AGAINST NORTH ABUTMENT DURING PERIODS OF HIGH

FLOW.

61.4 WIDESPREAD MINOR ACCUMULATION OF FLOOD DEBRIS IN

CHANNEL; LARGE LOG IN UPSTREAM CHANNEL NEAR NORTH BANK.

61.6 BRIDGE WAS OVERTOPPED IN 1996 FLOOD.

222.3 APPROACH GUARDRAIL AT NORTH APPROACH ONLY; TIMBER RAIL

WITH CONCRETE POSTS. 6TH RAIL SECTION ON WEST SIDE

MISSING.

222.4,6 MINOR SETTLEMENT OF APPROACH PAVEMENT WITH PAVEMENT

BROKEN UP ALONG BACKWALLS.

222.7 "WEIGHT LIMIT 10 TONS" SIGN AT NORTH APPROACH.

222.9 TWO LOCKED GATES AT SOUTH APPROACH.

STRUCTURE LOAD RATING STRUCTURE NO. 3100-008P

TRUCK TYPE

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

TONS METRIC TONS TONS METRIC TONS

H 7 6 10 9

HS 8 7 11 10

TYPE 3 8 7 11 10

TYPE 3S2 11 10 16 15

TYPE 3-3 14 13 19 17

DESIGN LOADING: UNKNOWN

CAPACITY MEETS OR EXCEEDS DESIGN LOAD

X CAPACITY IS LESS THAN DESIGN LOAD

X ORIGINAL LOAD RATING CALCULATION APPLICABLE

ORIGINAL LOAD RATING CALCULATION REVISED

DATE OF LOAD RATING CALCULATION: 12/93

LOAD RATING CONTROLLED BY: DECK SHEAR CAPACITY

REMARKS: BEAMS RATE FOR H15 LOADING.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 3100-008P

STRUCTURE IDENTIFICATION

(201) PARK: C&O CANAL NATIONAL HISTORICAL PARK

(202) STRUCTURE NAME: .......... BIG SLACKWATER BRIDGE

(203) STRUCTURE KIND: ............ 1 - BRIDGE

(204) STRUCTURE NUMBER: ..... 3100-008P

(205) NPS REGION: .................... 2 - NATIONAL CAPITAL

(206) ROUTE CODE NUMBER: ... 212

(207) ROAD SECTION NO: .......... 008P

(208) NPS ROAD CLASS: ............ 2 - CONNECTOR ROAD

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

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

(211) PROJECT NO(S):

(212) DRAWING NUMBERS: ....... NONE

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

(22) OWNER: ............................... 66 - NATIONAL PARK SERVICE

(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) HISTORICAL DESIGNATION: ..

243 - MARYLAND (MD)

043 - WASHINGTON

164002120

C&O CANAL

DAM #4 ROAD

3100008P0000000

0.9 miles from Dam #4 on

99.99 FT (99.99 M)

84.30 (KM PT 135.66)

3 - FREE ROAD

5 - NOT ELIGIBLE

STRUCTURE DESCRIPTION, FOUNDATION, AND DECK TYPE

(43A) MAIN STR. MATERIAL: ..

(43B) MAIN STR. TYPE:

(45) NO. OF MAIN SPANS:

(48) MAX. SPAN LENGTH:

(49) STRUCTURE LENGTH:

(216A) ABUTMENT #1 FDN:

(216B) ABUTMENT #2 FDN:

(217A) PREDOM. PIER FDN.: ..

(217B) SECOND. PIER FDN: ...

(107) DECK TYPE:

3 - STEEL

03 - GIRDER & FLOOR BEAM SYSTEM

54.3 FT (16.6 M)

55.0 FT (16.8 M)

0 - UNKNOWN

0 - UNKNOWN

6 - N/A

6 - N/A

8 - WOOD OR TIMBER

(44A) APPR. STR. MATERIAL: ........ 0 - OTHER

(44B) APPR. STR. TYPE: ................ 00 - OTHER

(46) NO. OF APPROACH SPANS: .. 0

(108) WEAR SURFACE/PROTECT SYSTEM:

A) TYPE WEARING SURFACE: .. 0 - NONE

B) TYPE MEMBRANE: ................. 0 - NONE

C) TYPE PROTECTION: .............. 0 - NONE

(218) IS SALT USED?: ..................... NO

LOAD RATING AND POSTING

(31) DESIGN LOAD: ................. 0 - UNKNOWN (41) LOAD RESTRICTION: ......... P - POSTED FOR LOAD

(66) INVENTORY RATING: ...... 8.0 TONS (7.0 METRIC TONS) (70) BRIDGE POSTING: .............. 0 - POSTING REQUIRED

(64) OPERATING RATING: ...... 11.0 TONS (10.0 METRIC TONS)

INSPECTION DATES

(90) INSPECTION DATE: 10/11 (91) FREQ. OF INSP: 24 MONTHS (92 / 93) CRITICAL FEATURE INSPECTION (CFI):

(219) ADD. STUDIES NEEDED: N - 0 - NONE (A) FRACTURE CRITICAL: ... NO

INSP. EVERY: MONTHS - LAST INSP. : (220) SPECIAL STUDY TYPE: 0 - NONE

(B) UNDERWATER: .............. NO

(221) SPECIAL STUDY DATE: INSP. EVERY: MONTHS - LAST INSP. :

(C) SPECIAL INSPECTION: .. NO

INSP. EVERY: MONTHS - LAST INSP. :

D

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 3100-008P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(16) LATITUDE: ............................. 39°29'58.37" (51) CURB TO CURB WIDTH: ........... 20.1 FT (6.1 M)

(17) LONGITUDE: ......................... 77°50'36.07" (52) DECK WIDTH: ............................ 22.1 FT (6.7 M)

(19) DETOUR LENGTH: ............... 0 MI (0 KM) (32) APPR. ROADWAY WIDTH: ........ 27.0 FT (8.2 M)

(28A) LANES ON STRUCT: .......... 02 (213) APPR. PAVEMENT WIDTH: ..... 21.0 FT (6.4 M)

(28B) LANES UNDER STRUCT: ... 00 LEFT SHOULDER: .................. 3.0 FT (0.9 M)

(42A) SERVICE ON: ..................... 1 - HIGHWAY RIGHT SHOULDER: ................ 3.0 FT (0.9 M)

(42B) SERVICE UNDER: .............. 5 - WATERWAY (33) BRIDGE MEDIAN: ....................... 0 - NO MEDIAN

(29) AVG. DAILY TRAFFIC: .......... 212 (34) SKEW ANGLE: ............................ 32 °

(30) YEAR OF ADT: ...................... 2007 (35) DECK FLARE?: ........................... NO

(114) FUTURE ADT: ..................... 233 (47) TOTAL HORIZ. CLEARANCE: .... 20.1 FT (6.1 M)

(115) YEAR OF FUTURE ADT: ..... 2027 (50) SIDEWALKS:

(101) PARALLEL STRUCTURE: ... N - NONE LEFT : ...................................... 0.0 FT (0.0 M)

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

(39) VERTICAL CLEARANCE: ...... 0.0 FT (0.0 M) (214) BRIDGE RAIL TYPE:

(40) HORIZ. CLEARANCE: ........... 0.0 FT (0.0 M) RAIL CONFIGURATION: ......... 4 - CURB-TYPE WHEEL GUAR

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

DESIGN TYPE: ........................ 1 - CONTINUOUS RAIL

LATERAL UNDERCLEARANCE:

(55) RIGHT: ....................... 0.0 FT (0.0 M) (215) BRIDGE RAIL HEIGHT: ............ 1.25 FT (0.38 M)

(56) LEFT: ......................... 0.0 FT (0.0 M) (53) MIN. VRT. CLEAR. OVER DECK: 99.99 FT (99.99 M)

(54) MIN. VRT. UNDERCLEARANCE: 0.00 FT (0.00 M)

CONDITION AND APPRAISAL DATA, PROPOSED IMPROVEMENTS, AND COST

(58) DECK:

(59) SUPERSTRUCTURE:

(60) SUBSTRUCTURE:

(61) CHANNEL:

(62) CULVERT: ........................... N

(222) APPROACHES:

(223) RETAINING WALL: ........... N

(36) TRAFFIC SAFETY FEAT: ... NNNN

(75A) TYPE OF WORK: .............. 35 - GENERAL REHAB

(75B) WORK DONE BY: ............. 1 - CONTRACT

(76) IMPROVEMENT LENGTH: ..

(67) STRUCTURAL EVALUATION:

(68) DECK GEOMETRY:

(69) UNDERCLEARANCES:

(71) WATERWAY ADEQUACY:

(72) APPROACH ALIGNMENT:

(113) SCOUR CRITICAL:

(225) PURPOSE OF IMPROVEMENT:

(226) PRIORITY OF IMPROVEMENT:

(227) MAINTENANCE COST:

(228) REHAB./RECONSTR. COST: ...

(229) CONSTRUCTION COST:

N

8 - Stable; scour above top of fo

2 - REHAB/RECONSTRUCTION

D - MINOR

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

1977-MAJOR RECONSTRUCTION/SUPERSTRUCTURE. 1992-DECK PLANKS REPLACED. 1994-STRUCTURE REPAINTED.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

http:77�50'36.07 http:39�29'58.37

APPENDIX STRUCTURE NO. 3100-008P

PHOTOGRAPHS STRUCTURE NO. 3100-008P

PHOTO #1 - LOOKING SOUTH TOWARD POTOMAC RIVER

FLOW

PHOTO #2 - WEST (UPSTREAM) SIDE

PHOTO #3 - GENERAL TOPSIDE VIEW

LOOKING NORTH; NOTE ACCUMULATION OF

LEAVES IN CURBLINES

PHOTO #4 - TYPICAL CHECKING AND DECAY

OF TIMBER DECK PLANKS; NEAR MIDSPAN

SHOWN

PHOTO #5 - TYPICAL LOOSE TIMBER DECK PLANK; CENTERLINE OF

BRIDGE AT SOUTH END SHOWN

PHOTO #6 - TYPICAL CHECKING OF TIMBER CURBS; EAST CURB AT

MIDSPAN SHOWN; ALSO NOTE SHORT TIE-DOWN BOLT WITH NUT

MISSING

PHOTO #7 - TYPICAL EDGE SPALLING OF TOP

OF ABUTMENT BACKWALLS; SOUTH

ABUTMENT SHOWN; ALSO NOTE TYPICAL

SETTLEMENT OF APPROACH PAVEMENT WITH

PAVEMENT BROKEN UP ALONG BACKWALL

PHOTO #8 - CLOSE-UP OF PREVIOUS PHOTO;

NOTE GAP BETWEEN DECK PLANK AND

ABUTMENT BACKWALL ALLOWING DEBRIS TO

FALL THROUGH ONTO BEARING SEATS

PHOTO #9 - 6TH TIMBER APPROACH GUARDRAIL SECTION MISSING ON

WEST SIDE OF NORTH APPROACH

PHOTO #10 - GENERAL UNDERSIDE VIEW LOOKING SOUTH

PHOTO #11 - TYPICAL CONDITION OF BEARINGS; BEAM #2 AT SOUTH

ABUTMENT SHOWN; NOTE ANCHOR BOLT IS MISSING ON OPPOSITE

SIDE OF THIS BEAM

PHOTO #12 - ELASTOMERIC BEARING PAD BENEATH BEAM #3

OVERHANGING SOUTH ABUTMENT BEARING SEAT

PHOTO #13 - FUNGUS GROWTH ON DECK UNDERSIDE AT SOUTH

ABUTMENT BETWEEN BEAMS #3 AND #4

PHOTO #14 - TYPICAL PEELING OF PAINT AND RUSTING OF

STRUCTURAL STEEL; BETWEEN BEAMS #3 AND #4 NEAR SOUTH

ABUTMENT SHOWN

PHOTO #15 - GENERAL VIEW OF NORTH

ABUTMENT; NOTE TYPICAL STAINING / MOLD

GROWTH ON BREASTWALLS

PHOTO #16 - TYPICAL VEGETATION GROWTH

AT CORNERS OF STRUCTURE; SOUTHWEST

CORNER SHOWN

PHOTO #17 - UPSTREAM CHANNEL

PHOTO #18 - LOG IN UPSTREAM CHANNEL NEAR NORTH BANK

PHOTO #19 - DOWNSTREAM CHANNEL