Bridge Insp Report_ Structure 6640-003T.pdf

BRIDGE INSPECTION REPORT

JACKS FORK PEDESTRIAN BRIDGE

PEDESTRIAN BRIDGE OVER JACKS FORK

OZARK NATIONAL SCENIC RIVERWAYS

LS

STRUCTURE NO. 6640-003T

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 4/15/14

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. 6640-003T

JACKS FORK PEDESTRIAN BRIDGE INSPECTION DATE: 4/15/14

BRIDGE IDENTIFICATION AND DESCRIPTION

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

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

# OF BEAMS, MAIN SPAN: .. 2 STRUCT. TOTAL LENGTH: .. 450.3 FT (137.3 M)

DECK TYPE: ......................... WOOD OR TIMBER MAX. SPAN LENGTH: .......... 70.3 FT (21.4 M)

WEARING SURFACE: .......... NONE DECK WIDTH: ...................... 6.6 FT (2.0 M)

ABUT. FOUNDATIONS: ........ CURB TO CURB WIDTH: ..... 5.7 FT (1.7 M) SPREAD FOOTING ON PILES / SPREAD

PIER FOUNDATION(S): ........ SPREAD FOOTING ON PILES YEAR BUILT:

ABUTMENT / PIER MAT'L: ... CONCRETE YEAR RECONSTRUCTED: .. N/A

PROJ./PLAN REF. NO: ......... CX600039014 / 41046 SKEW ANGLE: ..................... 0 °

NPS ROAD CLASS: .............. 6 - RESTRICTED FRACTURE CRITICAL: ........ YES

STRUCTURE HISTORY: ...... 1992 - RAILING PAINTED. 2012 - RAILING PAINTED AND VEGETATION REMOVED AGAINST

PIER #2.

LOCATION

OZARK NATIONAL SCENIC RIVERW AYS MILE POINT: ..................... 0.02 (KM PT 0.03)

STATE: ................................. MISSOURI LOCATION: Adjacent to Route 106 over Jacks Fork.

FACILITY CARRIED: ............ PEDESTRIAN BRIDGE

FEATURE INTERSECTED: .. JACKS FORK

STRUCTURE EVALUATION SUMMARY

This weathering steel two girder pedestrian bridge is in generally fair condition. The main problems requiring attention are deterioration of several deck planks and a 4" height differential between the backwall and sidewalk at the north approach. These areas of deterioration have not increased since the last inspection but still remain a hazard to pedestrians walking across this structure.

In addition, the channel appears to be migrating toward the south, with scour exposing the footings at Piers #2, #4, and #5 as a result. The channel bed is filling in at Piers #2 and #3, but a tree lodged against Pier #2 has caused a scour hole to develop at the downstream side. The tree should be removed, and engineered riprap should be installed at Piers #2, #4, and #5 to provide long-term protection against scour as the channel continues to migrate.

Additional problems include deterioration of the utility hangers and covers, fractured/section-loss at some bearing grout pads, and loose and missing expansion joint cover plates. Corrective measures should be taken as outlined in this report to prevent the possible development of more serious or costly problems in the future.

INSPECTION TEAM: C. CASTRO, V. VENKATASAMY

CONDITION ASSESSMENT:

CARLOS CASTRO, P.E., FIELD TEAM LEADER 571-434-1546

REPORT REVIEW :

MARCUS MILLER, P.E., SENIOR INSPECTION ENGINEER 703-404-6252

REPORT APPROVAL: DATE: 8/27/14

JORGOMAI CEESAY, PH.D., P.E., BIP SUPERVISORY ENGINEER 703-404-6244

RECOMMENDATIONS AND ESTIMATED COSTS STRUCTURE NO. 6640-003T

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.

C226 PRIORITY OF IMPROVEMENT

ITEM

NO.

MAINTENANCE RECOMMENDATIONS

(GENERALLY NOT FLHP ELIGIBLE)

QTY. UNIT COST

UNIT

ESTIMATE

COST

PRELIM.

59.1 REPAIR GROUT PAD FOR EAST BEARING AT NORTH ABUTMENT. 1 LS

58.2 RESET SOUTH EXPANSION JOINT COVER PLATE; REPLACE COVER PLATE AT

NORTH JOINT.

2 EA

60.3,13 REMOVE VINE AND VEGETATION GROWTH FROM SUBSTRUCTURE AS NEEDED. 1 LS

61.4 REMOVE FLOOD DEBRIS AT PIERS AS NEEDED. 1 LS

222.6 REPAIR HEIGHT DIFFERENTIAL AT NORTH APPROACH. 1 CY

60.9 REPAIR UNDERMINING AT SOUTH ABUTMENT. 1 CF

60.3 REMOVE DEBRIS FROM ABUTMENT BEARING SEATS. 1 LS

58.8 REPAIR BROKEN UTILITY CONDUIT AT PIER #1. 1 LS

PRELIM. MAINTENANCE TOTAL :

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS)

QTY. UNIT

UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

58.1 REPLACE DECK WITH TREATED TIMBER PLANKS. 2,250 SF

60.17 INSTALL ENGINEERED RIPRAP AT PIERS #2, #4, AND #5 TO

PROVIDE LONG-TERM PROTECTION AGAINST SCOUR.

1 LS

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL :

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. 6640-003T

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

1. DECK SLAB

2. EXPANSION JOINTS

3. WEARING SURFACE

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 6

1. BEARING DEVICES F

2. GIRDERS OR BEAMS G

3. ARCH(ES) OR SLAB(S) N

4. FLOOR BEAMS AND STRINGERS G

5. TRUSSES N

6. DIAPHRAGMS AND BRACING N

7. PAINT N

8. FASCIA(E) N

9. DEFLECTION AND/OR VIBRATION F

10. ALIGNMENT G

11. OTHER N

60. SUBSTRUCTURE 6

ABUTMENTS

1. BREASTWALLS OR COLUMNS

2. PILE BENTS

3. CAPS AND/OR BEARING SEATS

4. BACKWALLS AND/OR BULKHEADS

5. FOUNDATIONS (BURIED)

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 ((VEGETATION))

F F N G F F G F G N

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

G N G G F G N

58.1,9

58.2

58.6

58.8

59.1

59.2

59.6,9

ITEM REFERENCE AND REMARKS

MODERATE TO SEVERE DETERIORATION AND CHECKING OF 3"X7"

LONGITUDINAL DECK PLANKS; SEVERAL PLANKS ARE LOOSE,

BOWED, AND SAGGING THROUGHOUT. MODERATE TO SEVERE

SPOT DECAY OF TIMBER. WHITE MOLD PRESENT IN MANY AREAS

ON DECK UNDERSIDE. MISSING DECK TIE-DOWN BOLTS IN TWO

LOCATIONS IN SPAN #2.

SIGNIFICANT DEFLECTION OF ONE DECK PLANK AT NORTH END

UNDER PEDESTRIAN LOADING.

SOUTH EXPANSION JOINT COVER PLATE IS LOOSE AND

MISALIGNED; MINOR RUSTING. NORTH COVER PLATE MISSING.

RAILING WAS PAINTED IN 2012. MINOR FLAKING OF COATING.

SEVERAL UTILITY LINES UNDER STRUCTURE; INSULATION IS

BECOMING UNWRAPPED IN SOME LOCATIONS. SEVERAL

UNCONNECTED HANGERS FOR UTILITY LINES. A UTILITY PIPE

LEAKING AT SPAN #2. UTILITY BOX ON EAST RAILING OVER PIER

#1. HEAVY DEBRIS ON UTILITIES AT SOUTH ABUTMENT. HEAVY

VEGETATION GROWTH ON UTILITIES AT PIER #1. WEST CONDUIT

ATTACHED TO PIER #1 IS BROKEN, WIRES ARE EXPOSED.

STEEL PLATE OVER GROUT PADS AT BEARINGS. FRACTURED

GROUT PAD FOR EAST BEARING AT NORTH ABUTMENT. MINOR

SPALLING OF GROUT PADS AT SOUTH ABUTMENT BEARINGS.

SECTION LOSS OF GROUT PADS AT PIERS, PARTICULARLY AT EAST

BEARING ON PIER #3. ANCHOR BOLT NUTS NOT FULLY SEATED AT

BOTH ABUTMENTS. LOOSE STEEL PLATE AT WEST BEARING ON

NORTH ABUTMENT.

A588 WEATHERING STEEL. RAIL POSTS ARE WELDED TO TOP

FLANGES OF TWO-GIRDER CONTINUOUS SYSTEM. HOLES

PUNCHED IN UPPER PORTION OF WEB IN EAST GIRDER, SPAN #2

NEAR PIER #1, AND IN WEST GIRDER NEAR SOUTH ABUTMENT.

NO CROSS-BRACING PRESENT.

FIELD INSPECTION REPORT STRUCTURE NO. 6640-003T

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 PROTECTION3.

EROSION AND/OR SCOUR2.

ALIGNMENT1.

61. CHANNEL 7

G G N F N

MED

SUFF

16 FT.

SAND, GRAVEL, ROCK

222. APPROACHES 7

OTHER 9.

ALIGNMENT 8.

SIGNS7.

SETTLEMENT 6.

EROSION5.

SURFACING4.

APPROACH GUARDRAIL 3.

2. RELIEF JOINTS

APPROACH SLABS1. N

N N G G F G G N

223. RETAINING WALL N

OTHER 6.

SETTLEMENT OR DEFLECTION5.

EROSION AND/OR SCOUR4.

FOUNDATION3.

WEEP HOLES2.

1. WALL

36. TRAFFIC AND SAFETY FEATURES

APPROACH GUARDRAIL ENDSD.

APPROACH GUARDRAILSC.

TRANSITIONSB.

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.

60.1 MINOR TRANSVERSE CRACKING AT TOP OF NORTH ABUTMENT

BREASTWALL WITH EFFLORESCENCE.

60.3,4 MODERATE DEBRIS ACCUMULATION ON ABUTMENT BEARING

SEATS. MINOR CRACKING AND SPALLING OF CONCRETE AT NORTH

ABUTMENT BEARING SEAT AREA AND TOP OF BACKWALL. UP TO

18" VOID AT EAST END OF SOUTH ABUTMENT BACKWALL.

60.6 MINOR VEGETATION GROWTH AT WINGWALLS.

60.9 MINOR UNDERMINING (3"H X 36"L X UP TO 8"D) AT SOUTH

ABUTMENT, EAST SIDE.

60.13 STEEL DEBRIS SHIELD ON UPSTREAM FACE OF EACH PIER. MINOR

ABRASION OF CONCRETE NEAR WATERLINE AT SEVERAL PIERS.

MINOR DELAMINATION AND SPALLING WITH EXPOSED REBAR (1'L X

1'H X 1/2"D) ON UPSTREAM END OF PIER #2 SOUTH FACE, 6' UP

FROM WATERLINE. MINOR VINE GROWTH ON PIER #6.

60.17, 61.4 PIERS ARE FOUNDED ON PILES. MODERATE SCOUR AT PIERS,

JACKETS NOT VISIBLE AT TIME OF INSPECTION. FOOTING

EXPOSED UP TO 6"H AT PIER #2, UP TO 7.7'H AT PIER #4 AND UP TO

8.3'H AT PIER #5 (DIMENSIONS NO VERIFIED DURING THIS

INSPECTION).

DEBRIS AND TREE BRANCHES ACCUMULATED AGAINST PIER #2,

NORTH SIDE. MINOR SCOUR VISIBLE AT DOWNSTREAM SIDE OF

PIER.

REMAINING AREAS OF EXPOSED CONCRETE JACKET AND

EXPOSED COFFERDAM STEEL SHEET PILING WERE UNABLE TO

VERIFY DURING THIS INSPECTION.

GRAVEL BAR IN CHANNEL UNDER SPAN #4 AND SURROUNDING

PIER #3.

222.6 4" HEIGHT DIFFERENTIAL BETWEEN BACKWALL AND SIDEWALK AT

NORTH APPROACH. MINOR SETTLEMENT AT SOUTH APPROACH.

222.7 HORSES PROHIBITED SIGN AT EACH APPROACH.

APPENDIX STRUCTURE NO. 6640-003T

PHOTOGRAPHS STRUCTURE NO. 6640-003T

PHOTO #1 - LOOKING NORTH

FLOW

PHOTO #2 - WEST (UPSTREAM) SIDE

PHOTO #3 - GENERAL TOPSIDE VIEW

LOOKING NORTH

PHOTO #4 - TYPICAL CHECKING AND

SPLITTING OF DECK PLANKS, DECK AT

MIDSECTION OF SOUTH SPAN SHOWN

PHOTO #5 - TYPICAL SAGGING OF DECK PLANKS, DECK SECTION

NEAR END OF SOUTH SPAN SHOWN

PHOTO #6 - TYPICAL WARPING OF TIMBER DECK PLANKS, DECK IN

SPAN #2 SHOWN

PHOTO #7 - DECAY IN SOME TIMBER DECK PLANKS, DECK IN SPAN #4

SHOWN

PHOTO #8 - TYPICAL RUSTING OF RAILING, EAST RAILING IN SPAN #2

AND SPAN #3 SHOWN

PHOTO #9 - CRACKING AND SPALLING OF CONCRETE ON TOP OF

NORTH ABUTMENT BACKWALL; ALSO NOTE MISSING EXPANSION

JOINT COVER PLATE

PHOTO #10 - HEIGHT DIFFERENTIAL BETWEEN NORTH ABUTMENT

BACKWALL AND NORTH APPROACH PAVEMENT

PHOTO #11 - GENERAL UNDERSIDE VIEW

LOOKING SOUTH, SPAN #6

PHOTO #12 - TYPICAL UTILITY INSULATION

DETERIORATION, UTILITIES UNDERNEATH OF

SOUTH SPAN SHOWN

PHOTO #13 - GENERAL VIEW OF NORTH ABUTMENT

PHOTO #14 - ANCHOR BOLT NUT NOT FULLY SEATED ON EAST

BEARING AT NORTH ABUTMENT; NOTE ALSO FRACTURED GROUT

PAD, AND DEBRIS ACCUMULATION ON ABUTMENT BEARING SEATS

PHOTO #15 - UNDERMINING NEAR EAST END

OF SOUTH ABUTMENT; NOTE ALSO DEBRIS

ACCUMULATION ON BEARING SEATS, AND

TYPICAL ALGAE GROWTH ON BREASTWALL

PHOTO #16 - UP TO 18" VOID AT EAST END OF

SOUTH ABUTMENT BACKWALL

PHOTO #17 - TYPICAL CONDITION OF PIERS,

NORTH FACE OF PIER #5 SHOWN

PHOTO #18 - DETERIORATED GROUT PAD AT

EAST BEARING ON PIER#3

PHOTO #19 - DEBRIS ACCUMULATION AT

UPSTREAM FACE OF PIER #2; NOTE ALSO

TREE BRANCHES IN CHANNEL

PHOTO #20 - VEGETATION GROWTH AROUND

UTILITY BOXES IN SOUTH FACE OF PIER #1

PHOTO #21 - UTILITY CONDUITS ATTACHED

TO NORTH FACE OF PIER #1; NOTE BROKEN

CONDUIT WITH EXPOSED WIRES AT WEST

END

PHOTO #22 - LOOKING UPSTREAM FROM

BRIDGE (PHOTO FROM 4/16/12 INSPECTION)

PHOTO #23 - LOOKING DOWNSTREAM FROM BRIDGE