5570-477P1964.pdf

STRUCTURE SUMMARY STRUCTURE NO. 5570-477P

WHITE OAK CREEK BRIDGE #2 INSPECTION DATE: 1/17/17

BRIDGE IDENTIFICATION AND DESCRIPTION

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

MAIN SPAN TYPE: ............... SLAB NO. OF APPR. SPANS:

# OF BEAMS, MAIN SPAN: .. 1 STRUCT. TOTAL LENGTH: .. 124.0 FT (37.8 M)

DECK TYPE: ......................... CONCRETE CAST-IN-PLACE MAX. SPAN LENGTH: .......... 70.0 FT (21.3 M)

WEARING SURFACE: .......... NONE DECK WIDTH: ...................... 37.5 FT (11.4 M)

ABUT. FOUNDATIONS: ........ SPREAD FOOTING ON PILES CURB TO CURB WIDTH: ..... 34.5 FT (10.5 M)

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

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

PROJ./PLAN REF. NO: ......... 3O10 / SKEW ANGLE: ..................... 34 °

NPS ROAD CLASS: .............. 1 - PRINCIPAL PARK ROAD FRACTURE CRITICAL: ........ NO

STRUCTURE HISTORY: ...... 2006-NEW OVERLAY.

LOCATION

NATCHEZ TRACE PARKWAY MILE POINT: ..................... 99.13 (KM PT 159.53)

STATE: ................................. MISSISSIPPI LOCATION: 3O PROJECT SECTION

FACILITY CARRIED: ............ NATCHEZ TRACE PARKWAY

FEATURE INTERSECTED: .. WHITE OAK CREEK

STRUCTURE EVALUATION SUMMARY

This continuous concrete slab bridge is in good condition overall. Problems include deterioration of the previously saw cut pavement and sealant at the end of the approach slabs; cracking and raveling of the asphalt along the joint between the abutment spans and the approach slabs; and moderate settlement of the approach shoulders. In addition, there is an area of broken up and missing asphalt along the south abutment joint that has exposed the joint anchorage; minor erosion and undermining of the drain inlet at the east side of the south approach; and accumulation of debris along the curblines, around the drains, and in the joints.

It should also be noted that moderate to severe erosion is present under the end spans and along the piers due to drainage from the bridge deck. This has resulted in gullies measuring up to 5' wide x 5' deep. This condition will continue to be monitored during future inspection cycles.

An object marker has been installed at the drainage pipe outflow on the southeast embankment since the last inspection.

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: L.E. SHEPTUCK, J.T. ALLEN (CLARK NEXSEN)

CONDITION ASSESSMENT:

LUKE E SHEPTUCK, FIELD TEAM LEADER

REPORT REVIEW:

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

REPORT APPROVAL: DATE: 5/31/17

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

RECOMMENDATIONS AND ESTIMATED COSTS STRUCTURE NO. 5570-477P

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

B (Major) - Structure exhibits severe deterioration, presents a safety hazard, or is designated a high priority due to age and/or condition.

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.

222.2 CLEAN AND RESEAL RELIEF JOINTS AT APPROACHES.

222.4 CLEAN AND SEAL CRACKING OF APPROACH PAVEMENT.

222.6 INSTALL ASPHALT TRANSITIONS AT APPROACH SHOULDERS TO CORRECT

SETTLEMENT.

58.3 REPAIR BROKEN UP AND MISSING SECTION OF ASPHALT WEARING SURFACE

ALONG SOUTH ABUTMENT JOINT IN NORTHBOUND LANE.

222.6 REPAIR EROSION AND UNDERMINING AROUND DRAIN INLET AT EAST SIDE OF

SOUTH APPROACH.

58.2,7 CLEAR DEBRIS ALONG CURBLINES, AROUND DRAINS, AND IN JOINTS.

PRELIM. MAINTENANCE TOTAL :

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS)

QTY. UNIT

UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL :

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. 5570-477P

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 7

DECK SLAB 1. G

EXPANSION JOINTS 2. G 58, 59, 60

WEARING SURFACE 3. G

RIDEABILITY 4. G

CURBS, SIDEWALKS, AND MEDIAN 5. G

PARAPETS AND/OR RAILINGS 6. G 58.1, 59.3

DRAINS AND DRAINAGE 7. G

UTILITIES 8. N

DEFLECTION AND/OR VIBRATION 9. G

OTHER 10. N

59. SUPERSTRUCTURE 7 58.2,3

BEARING DEVICES 1. G

GIRDERS OR BEAMS 2. N

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

FLOOR BEAMS AND STRINGERS 4. N

TRUSSES 5. N

DIAPHRAGMS AND BRACING

7.

6.

PAINT

N N

58.3

FASCIA(E)8. N

DEFLECTION AND/OR VIBRATION 9. G

OTHER

ALIGNMENT 10.

11. N G

58.5,6

60. SUBSTRUCTURE 7

ABUTMENTS

PILE BENTS

BREASTWALLS OR COLUMNS

2.

1. G

N 58.7

CAPS AND/OR BEARING SEATS 3. G

BACKWALLS AND/OR BULKHEADS 4. N

WINGWALLS

FOUNDATIONS

6.

5. N

G 60.1

WEEP HOLES 7. N

EXPANSION JOINTS 8. N

SETTLEMENT OR DEFLECTION

EROSION AND/OR SCOUR

10.

9. G

G 60.3,6

SLOPE PROTECTION 11. G

OTHER 12. N

PIER(S)

WALLS AND/OR COLUMNS 13. G 60.6

PILE BENTS 14. N

CAPS AND/OR BEARING SEATS 15. G

FOUNDATIONS 16. N

EROSION AND/OR SCOUR 17. F 60.17

SETTLEMENT OR DEFLECTION 18. G

OTHER 19. N

ITEM REFERENCE AND REMARKS

MINOR VINE GROWTH ON STRUCTURE EXTENDING ONTO SLAB

UNDERSIDE.

MINOR SHRINKAGE CRACKING THROUGHOUT SLAB UNDERSIDE.

MINOR CRACKING OF SLAB UNDERSIDE, SOME WITH

EFFLORESCENCE. MINOR CRACKING WITH EFFLORESCENCE ON

SLAB SIDES OVER PIERS.

MINOR ACCUMULATION OF DEBRIS IN EXPANSION JOINTS ALONG

ROADWAY; HEAVY ALONG SHOULDERS.

WEARING SURFACE BROKEN UP AND MISSING (42"L X 6"W X 2"D)

WITH JOINT ANCHORAGE EXPOSED ALONG SOUTH ABUTMENT

JOINT IN NORTHBOUND LANE ADJACENT TO SHOULDER.

MINOR LONGITUDINAL AND TRANSVERSE CRACKING OF WEARING

SURFACE.

MINOR POPOUTS AND CRACKING OF CURBS AND RAILINGS AT

RANDOM LOCATIONS.

MINOR ACCUMULATION OF DEBRIS AND VEGETATION GROWTH

ALONG CURBLINES AND AROUND DRAINS.

MINOR VERTICAL CRACKING OF SOUTH ABUTMENT BREASTWALL.

MINOR CRACKING WITH EFFLORESCENCE ON WINGWALLS AT

BEARING SEAT AREAS.

MINOR MOWER DAMAGE THROUGHOUT WINGWALLS.

MODERATE TO SEVERE EROSION UNDER NORTH AND SOUTH

SPANS AND ALONG PIERS WITH DRAINAGE GULLIES UP TO 5 W X

5'D.

FIELD INSPECTION REPORT STRUCTURE NO. 5570-477P

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

G F G G N

LOW

SUFF

10 FT.

222. APPROACHES 6

OTHER 9.

ALIGNMENT 8.

SIGNS 7.

SETTLEMENT 6.

EROSION 5.

SURFACING 4.

APPROACH GUARDRAIL 3.

RELIEF JOINTS 2.

1. APPROACH SLABS

(DRAIN)

N F N G G F 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. 1

N N N

61.2,3 MODERATE EROSION OF CHANNEL BANKS, BANKS CUT TO

VERTICAL FACES WITH TREE ROOTS EXPOSED; SOME RIPRAP IN

PLACE ALONG DOWNSTREAM CHANNEL BANKS.

222.2,4 MINOR CRACKING OF APPROACH PAVEMENT. MINOR CRACKING

AND RAVELING OF ASPHALT ALONG JOINT BETWEEN ABUTMENT

SPANS AND APPROACH SLABS.

PAVEMENT SAW CUT AND SEALED AT APPROACH ENDS OF

APPROACH SLABS; MINOR TO MODERATE DETERIORATION OF

ASPHALT AND SEALANT.

222.5,9 CONCRETE DRAIN INLET AT EAST SIDE OF SOUTH APPROACH 1"

LOWER THAN SURROUNDING PAVEMENT. MINOR EROSION AND

UNDERMINING AROUND DRAIN INLET. MINOR MOWER DAMAGE TO

EDGES OF DRAIN INLET. ACCUMULATION OF DEBRIS PARTIALLY

BLOCKING DRAIN INLET.

222.6 MODERATE SETTLEMENT (UP TO 2") OF APPROACH SHOULDERS.

222.7 OBJECT MARKERS PRESENT AT ENDS OF RAILINGS. OBJECT

MARKER INSTALLED AT DRAINAGE PIPE OUTFLOW ON SOUTHEAST

EMBANKMENT SINCE LAST INSPECTION.

TRAFFIC SAFETY RATING CODES

N

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

Meets currently acceptable standards.

Not applicable or a safety feature is not required.

STRUCTURE LOAD RATING STRUCTURE NO. 5570-477P

TRUCK TYPE

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

TONS METRIC TONS TONS METRIC TONS

H 20 18 33 30

HS 36 33 60 55

TYPE 3 24 22 41 37

TYPE 3S2 32 29 53 48

TYPE 3-3 38 34 63 58

DESIGN LOADING: HS20 (MS18)

X CAPACITY MEETS OR EXCEEDS DESIGN LOAD

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: RATING IS BASED ON DESIGN LOAD OF STRUCTURE.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5570-477P

STRUCTURE IDENTIFICATION

(201) PARK: NATCHEZ TRACE PARKWAY (1) STATE: ....................................... 284 - MISSISSIPPI (MS)

(202) STRUCTURE NAME: .......... WHITE OAK CREEK BRIDGE #2 (2) STATE HWY. AGENCY DIST:

(203) STRUCTURE KIND: ............ 1 - BRIDGE (3) COUNTY CODE: ........................ 089 - MADISON

(204) STRUCTURE NUMBER: ..... 5570-477P (4) CITY/PLACE CODE:

(205) NPS REGION: .................... 4 - SOUTHEAST (5) INVENTORY ROUTE:

(206) ROUTE CODE NUMBER: ... 0 (6) FEATURES INTERSECTED:....... WHITE OAK CREEK

(207) ROAD SECTION NO: .......... 477P (7) FACILITY CARRIED: .................. NATCHEZ TRACE PARKWAY

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5570477P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 3O PROJECT SECTION

(210) OPERATING UNIT: ............. RIDGELND (10) INV. RTE. - MIN. VERT. CLR: .. 99.99 FT (99.99 M)

(211) PROJECT NO(S): ................ 3O10 (11) MILE POINT: ............................. 99.13 (KM PT 159.53)

(212) DRAWING NUMBERS: ....... (27) YEAR BUILT:

(21) MAINTAINED BY: ................. 66 - NATIONAL PARK SERVICE (106) YEAR RECONSTRUCTED: .... N/A

(22) OWNER: ............................... 66 - NATIONAL PARK SERVICE (20) TOLL: ........................................ 3 - FREE ROAD

(37) HISTORICAL DESIGNATION: .. 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:

2 - CONCRETE CONTINUOUS

01 - SLAB

70.0 FT (21.3 M)

124.0 FT (37.8 M)

3 - SPREAD FOOTING ON PILES

3 - SPREAD FOOTING ON PILES

3 - SPREAD FOOTING ON PILES

6 - N/A

1 - CONCRETE CAST-IN-PLACE

(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: ................. 5 - HS20 (MS18) (41) LOAD RESTRICTION: ......... R - POSTED (OTHER)

(66) INVENTORY RATING: ...... 36.0 TONS (32.7 METRIC TONS) (70) BRIDGE POSTING: .............. 5 - NO POSTING REQUIRED

(64) OPERATING RATING: ...... 60.0 TONS (55.0 METRIC TONS)

INSPECTION DATES

(90) INSPECTION DATE: 1/17 (91) FREQ. OF INSP: 48 MONTHS (92 / 93) CRITICAL FEATURE INSPECTION (CFI):

(219) ADD. STUDIES NEEDED: (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. :

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5570-477P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(16) LATITUDE: ............................. 32°25'40.80" (51) CURB TO CURB WIDTH: ........... 34.5 FT (10.5 M)

(17) LONGITUDE: ......................... 90°10'54.60" (52) DECK WIDTH: ............................ 37.5 FT (11.4 M)

(19) DETOUR LENGTH: ............... 0 MI (0 KM) (32) APPR. ROADWAY WIDTH: ........ 34.0 FT (10.4 M)

(28A) LANES ON STRUCT: .......... 02 (213) APPR. PAVEMENT WIDTH: ..... 22.0 FT (6.7 M)

(28B) LANES UNDER STRUCT: ... 00 LEFT SHOULDER: .................. 6.0 FT (1.8 M)

(42A) SERVICE ON: ..................... 1 - HIGHWAY RIGHT SHOULDER: ................ 6.0 FT (1.8 M)

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

(29) AVG. DAILY TRAFFIC: .......... 210 (34) SKEW ANGLE: ............................ 34 °

(30) YEAR OF ADT: ...................... 2012 (35) DECK FLARE?: ........................... NO

(114) FUTURE ADT: ..................... 231 (47) TOTAL HORIZ. CLEARANCE: .... 34.5 FT (10.5 M)

(115) YEAR OF FUTURE ADT: ..... 2032 (50) SIDEWALKS:

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

(38) NAVIGATION CONTROL?: ... N 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: ......... 1 - FULL HEIGHT (NO PARAPE

(111) ABUT. OR PIER PROT: ....... MATERIAL: .............................. 0 - N/A

DESIGN TYPE: ........................ 0 - N/A

LATERAL UNDERCLEARANCE:

(55) RIGHT: ....................... 0.0 FT (0.0 M) (215) BRIDGE RAIL HEIGHT: ............ 2.50 FT (0.76 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: ... 1NNN

(75A) TYPE OF WORK:

(75B) WORK DONE BY:

(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

5 - Stable; scour within limits of

1 - MAINTENANCE

D - MINOR

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

2006-NEW OVERLAY.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

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APPENDIX STRUCTURE NO. 5570-477P

PHOTOGRAPHS STRUCTURE NO. 5570-477P

PHOTO #1 - LOOKING SOUTHBOUND TOWARD NATCHEZ

FLOW

PHOTO #2 - WEST (UPSTREAM) SIDE

PHOTO #3 - GENERAL TOPSIDE VIEW

LOOKING NORTH

PHOTO #4 - WEARING SURFACE BROKEN UP

AND MISSING WITH JOINT ANCHORAGE

EXPOSED ALONG SOUTH ABUTMENT JOINT IN

NORTHBOUND LANE

PHOTO #5 - TYPICAL CRACKING OF WEARING SURFACE; CENTER

SPAN NEAR NORTH PIER SHOWN

PHOTO #6 - TYPICAL ACCUMULATION OF DEBRIS ALONG CURBLINES;

EAST CURBLINE IN CENTER SPAN SHOWN

PHOTO #7 - TYPICAL DETERIORATION OF

ASPHALT AND SEALANT ALONG PAVEMENT

RELIEF JOINTS; SOUTH APPROACH SHOWN

PHOTO #8 - TYPICAL CRACKING AND

RAVELING OF ASPHALT ALONG JOINT

BETWEEN ABUTMENT SPANS AND APPROACH

SLABS; SOUTH APPROACH SHOWN

PHOTO #9 - CONDITION OF CONCRETE DRAIN INLET AT EAST SIDE OF

SOUTH APPROACH; ALSO NOTE EROSION AND UNDERMINING AROUND

DRAIN INLET AND ACCUMULATION OF DEBRIS

PHOTO #10 - TYPICAL SETTLEMENT OF APPROACH SHOULDERS; WEST

SHOULDER AT SOUTH APPROACH SHOWN

PHOTO #11 - GENERAL UNDERSIDE VIEW LOOKING SOUTH, CENTER

SPAN

PHOTO #12 - TYPICAL CRACKING OF SLAB UNDERSIDE WITH

EFFLORESCENCE; NORTH SPAN NEAR NORTH PIER SHOWN

PHOTO #13 - TYPICAL CRACKING WITH EFFLORESCENCE ON SLAB

SIDES OVER PIERS; WEST SIDE OVER NORTH PIER SHOWN

PHOTO #14 - GENERAL VIEW OF NORTH ABUTMENT

PHOTO #15 - TYPICAL CRACKING WITH EFFLORESCENCE ON

WINGWALLS AT BEARING SEAT AREAS; NORTHWEST WINGWALL

SHOWN

PHOTO #16 - GENERAL VIEW OF NORTH PIER, SOUTH SIDE

PHOTO #17 - TYPICAL EROSION UNDER NORTH AND SOUTH SPANS

AND ALONG PIERS WITH DRAINAGE GULLIES; WEST SIDE OF NORTH

PIER SHOWN

PHOTO #18 - TYPICAL EROSION UNDER NORTH AND SOUTH SPANS

AND ALONG PIERS WITH DRAINAGE GULLIES; WEST SIDE OF SOUTH

PIER SHOWN

PHOTO #19 - TYPICAL EROSION OF CHANNEL BANKS; NORTH

CHANNEL BANK BENEATH CENTER SPAN SHOWN

PHOTO #20 - LOOKING UPSTREAM THROUGH STRUCTURE, CENTER

SPAN

PHOTO #21 - LOOKING DOWNSTREAM THROUGH STRUCTURE,

CENTER SPAN