Bridge Inspection Rpt_STR 5460-008P.pdf

STRUCTURE SUMMARY STRUCTURE NO. 5460-008P

UPPER WALKER PRONG BRIDGE INSPECTION DATE: 6/21/18

BRIDGE IDENTIFICATION AND DESCRIPTION

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

MAIN SPAN TYPE: ............... ARCH - DECK NO. OF APPR. SPANS:

# OF BEAMS, MAIN SPAN: .. 1 STRUCT. TOTAL LENGTH: .. 30.0 FT (9.1 M)

DECK TYPE: ......................... NOT APPLICABLE MAX. SPAN LENGTH: .......... 30.0 FT (9.1 M)

WEARING SURFACE: .......... NOT APPLICABLE DECK WIDTH: ...................... 39.0 FT (11.9 M)

ABUT. FOUNDATIONS: ........ SPREAD FTG ON BEARING MAT'L CURB TO CURB WIDTH: ..... 36.0 FT (11.0 M)

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

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

PROJ./PLAN REF. NO: ......... 1A1 / 1017C SKEW ANGLE: ..................... 0 °

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

STRUCTURE HISTORY: ...... 2012 - ROADWAY REPAVED, SOUTH APPROACH EAST TIMBER GUARDRAIL INSTALLED.

LOCATION

GREAT SMOKY MOUNTAINS NATIONAL PARK MILE POINT: ..................... 12.98 (KM PT 20.89)

STATE: ................................. TENNESSEE LOCATION: 1.9 MILES NORTH FROM NEWFOUND

GAP.FACILITY CARRIED: ............ NEWFOUND GAP ROAD

FEATURE INTERSECTED: .. WALKER CAMP PRONG

STRUCTURE EVALUATION SUMMARY

This concrete arch bridge is in fair condition overall. The main problem with this bridge is deterioration of the masonry mortar joints throughout the structure. Additional problems include scour at the downstream end of the south abutment that has exposed the footing; deterioration of the vertical expansion joint material; debris and tree in upstream channel; and sloughing of the channel banks, a condition that has resulted in several trees along the banks being undermined. Finally, the southwest approach guardrail is broken with several post displaced.

The bank erosion will continue to be monitored during future inspection cycles.

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

INSPECTION TEAM: B. BUMPERS, T. POWELL (VOLKERT, INC.)

CONDITION ASSESSMENT:

BRITT BUMPERS, P.E., FIELD TEAM LEADER

REPORT REVIEW:

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

REPORT APPROVAL: DATE: 11/8/18

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

RECOMMENDATIONS AND ESTIMATED COSTS STRUCTURE NO. 5460-008P

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.

ROUTINE MAINTENANCE QTY. UNIT UNIT

COST

PRELIM.

COST

ESTIMATE

61.4 REMOVE DEBRIS AND TREE ACROSS UPSTREAM CHANNEL. 1 LS

PRELIM. MAINTENANCE TOTAL :

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS)

QTY. UNIT

UNIT

COST

PRELIM. COST

ESTIMATES

REHAB. RECONSTR.

58.6, 59.3, 60.1,6

REMOVE VEGETATION AND REPOINT MORTAR JOINTS AS

NECESSARY.

1 LS

60.5,9 PLACE ENGINEERED RIPRAP ALONG SOUTH ABUTMENT. 1 LS

60.8 REMOVE VEGETATION AND RESEAL VERTICAL JOINTS. 1 LS

222.3 REPLACE BROKEN TIMBER GUARDRAIL AND REALIGN POSTS AT

SOUTHWEST APPROACH GUARDRAIL.

1 LS

CONTRACT COSTS FOR MOBILIZATION, TRAFFIC CONTROL,

DESIGN, AND CONSTRUCTION ENGINEERING.

1 LS

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. 5460-008P

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

CONDITION RATING CODE EQUIVALENTS FOR SUB-ELEMENTS

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 sec ion 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.

FAILED CONDITION - out of service; beyond corrective action.

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

NOT APPLICABLE

EXCELLENT CONDITION

VERY GOOD CONDITION - no problems noted.

GOOD CONDITION - some minor problems.

SATISFACTORY CONDITION - structural elements show some minor deterioration.

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.

N

58. DECK ITEM REFERENCE AND REMARKS

OTHER

ALIGNMENT

DEFLECTION AND/OR VIBRATION

FASCIA(E)

DIAPHRAGMS AND BRACING

TRUSSES

FLOOR BEAMS AND STRINGERS

ARCH(ES) OR SLAB(S)

GIRDERS OR BEAMS

BEARING DEVICES

59. SUPERSTRUCTURE

OTHER

DEFLECTION AND/OR VIBRATION

UTILITIES

DRAINS AND DRAINAGE

PARAPETS AND/OR RAILINGS

CURBS, SIDEWALKS, AND MEDIAN

RIDEABILITY

WEARING SURFACE

EXPANSION JOINTS

DECK SLAB

OTHER

SETTLEMENT OR DEFLECTION

EROSION AND/OR SCOUR

FOUNDATIONS

CAPS AND/OR BEARING SEATS

PILE BENTS

WALLS AND/OR COLUMNS

PIER(S)

OTHER

SLOPE PROTECTION

SETTLEMENT OR DEFLECTION

EROSION AND/OR SCOUR

EXPANSION JOINTS

WEEP HOLES

WINGWALLS

FOUNDATIONS

BACKWALLS AND/OR BULKHEADS

CAPS AND/OR BEARING SEATS

PILE BENTS

BREASTWALLS OR COLUMNS

ABUTMENTS

60. SUBSTRUCTURE

1.

10.

2.

3.

4.

5.

6.

7.

8.

9.

10.

9.

8.

7.

6.

5.

4.

3.

2.

1.

PAINT

11.

N

N N F N N N N N G

N G

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

N N N N N N N

11.

10.

9.

8.

7.

6.

5.

4.

3.

2.

1.

12.

13.

14.

15.

16.

17.

18.

19.

(SPREAD FTG)

58.3, 222.4 5' L X 1' W X 1" D POTHOLE IN ASPHALT PAVEMENT IN NORTHBOUND

LANE.

58.6 MINOR TO MODERATE DETERIORATION OF PARAPET MASONRY

MORTAR JOINTS. DISPLACED STONES AT NORTHEAST PARAPET

END.

59.3 MINOR EFFLORESCENCE ON ARCH UNDERSIDE ALONG

CONSTRUCTION JOINTS. MODERATE SPALLING WITH EXPOSED

REBAR ALONG WEST CONSTRUCTION JOINT NEAR SOUTH

ABUTMENT. MAP CRACKING NEAR NORTH ABUTMENT.

MINOR TO MODERATE DETERIORATION OF MASONRY MORTAR

JOINTS OF SPANDREL WALLS; VEGETATION GROWTH PRESENT IN

SOME MORTAR JOINTS. MODERATE EFFLORESCENCE ON RING

STONES AND SPANDREL WALLS. MINOR CRACKING WITH

EFFLORESCENCE AND DETERIORATION OF MASONRY ON EAST

SPANDREL WALL AT NORTH ABUTMENT. MINOR DETERIORATION OF

MASONRY ON WEST SPANDREL WALL NEAR SOUTH ABUTMENT.

60.1 MODERATE DETERIORATION OF ABUTMENT BREASTWALL

MASONRY MORTAR JOINTS IN NORMAL WATER ZONE; MINOR

ELSEWHERE WITH EFFLORESCENCE. MINOR MOSS GROWTH ON

BOTH ABUTMENTS. ACTIVE LEAKAGE THROUGH NORTH ABUTMENT

BREASTWALL MASONRY AT GROUND LINE NEAR WEST END.

60.5,9 MINOR SCOUR AT DOWNSTREAM END OF SOUTH ABUTMENT WITH

FOOTING EXPOSED 6" H X 6' L; PREVIOUSLY NOTED RIPRAP

WASHED OUT SINCE 2010 INSPECTION.

MINOR EROSION ALONG WINGWALLS.

60.6 MINOR TO MODERATE MOSS AND VEGETATION GROWTH ON AND

ALONG WINGWALLS. MINOR TO MODERATE DETERIORATION OF

MORTAR JOINTS; MODERATE EFFLORESCENCE.

60.8 SEVERE DETERIORATION OF VERTICAL EXPANSION JOINT FILLER

WITH HEAVY VEGETATION GROWTH IN JOINTS.

F G N G G N

N

N

N

N

FIELD INSPECTION REPORT STRUCTURE NO. 5460-008P

ITEM REFERENCE AND REMARKS

61. CHANNEL 5

1. ALIGNMENT F

2. EROSION AND/OR SCOUR F

3. CHANNEL PROTECTION N

4. WATERWAY OBSTRUCTIONS F

5. OTHER N

6. ADEQUACY OF OPENING SUFF

7. NORMAL VELOCITY MED

8. AVERAGE CLEAR OPENING 13 FT.

9. STREAM BED COMPOSITION :

ROCK

222. APPROACHES 6

1. APPROACH SLABS

2. RELIEF JOINTS

3. APPROACH GUARDRAIL

4. SURFACING

5. EROSION

6. SETTLEMENT

7. SIGNS

8. ALIGNMENT

9. OTHER

N N F G F G N F N

223. RETAINING WALL N

1. WALL

2. WEEP HOLES

3. FOUNDATION

4. EROSION AND/OR SCOUR

5. SETTLEMENT OR DEFLECTION

6. OTHER

36. TRAFFIC AND SAFETY FEATURES

A. BRIDGE RAILINGS

B. TRANSITIONS

C. APPROACH GUARDRAILS

D. APPROACH GUARDRAIL ENDS

61.1 STREAM FLOW DIRECTED TOWARD NORTHEAST WINGWALL

DURING PERIODS OF HIGH FLOW.

61.2 MODERATE TO SEVERE SLOUGHING OF CHANNEL BANK ON

UPSTREAM AND DOWNSTREAM SIDES OF STRUCTURE WITH TREES

UNDERMINED.

61.2 SEE BRIDGE FILE FOR SCOUR EVALUATION.

61.4 LARGE TREE FALLEN ACROSS UPSTREAM CHANNEL. MINOR

DEBRIS IN UPSTREAM CHANNEL.

222.3, 36.C TIMBER GUARDRAIL IN SOUTH APPROACH ONLY. MINOR CHECKING

OF WEST GUARDRAIL WITH MINOR COLLISION DAMAGE. BROKEN

TIMBER GUARDRAIL AND DISPLACED POSTS DUE TO COLLISION

DAMAGE TO SECTION OF SOUTHWEST APPROACH GUARDRAIL.

GUARDRAIL HEIGHT OF 2'-0" DOES NOT MEET MINIMUM HEIGHT

GUIDELINES OF 2'-3" FOR TRAFFIC BARRIERS.

222.5 PAVEMENT UNDERMINED 6" L X 3" H X 6" AT END OF NORTHWEST

PARAPET.

222.7 REFLECTIVE OBJECT MARKERS NOT PROVIDED AT BRIDGE

CORNERS.

222.8 SOUTH APPROACH IS ON SHARP CURVE.

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. 5460-008P

TRUCK TYPE

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

TONS METRIC TONS TONS METRIC TONS

H 64 58 107 97

HS 127 115 212 192

TYPE 3 86 78 144 131

TYPE 3S2 136 123 226 205

TYPE 3-3 219 199 300 272

DESIGN LOADING: UNKNOWN

X CAPACITY MEETS OR EXCEEDS DESIGN LOAD

CAPACITY IS LESS THAN DESIGN LOAD

X ORIGINAL LOAD RATING CALCULATION APPLICABLE

ORIGINAL LOAD RATING CALCULATION REVISED

DATE OF LOAD RATING CALCULATION:

LOAD RATING CONTROLLED BY:

REMARKS: SEE BRIDGE FILE FOR LOAD RATING CALCULATIONS.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5460-008P

STRUCTURE IDENTIFICATION

(201) PARK: GREAT SMOKY MOUNTAINS NATIONAL PARK (1) STATE: ....................................... 474 - TENNESSEE (TN)

(202) STRUCTURE NAME: .......... UPPER WALKER PRONG BRIDGE (2) STATE HWY. AGENCY DIST:

(203) STRUCTURE KIND: ............1 - BRIDGE (3) COUNTY CODE: ........................ 155 - SEVIER

(204) STRUCTURE NUMBER: ..... 5460-008P (4) CITY/PLACE CODE:

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

(206) ROUTE CODE NUMBER: ... 10 (6) FEATURES INTERSECTED:....... WALKER CAMP PRONG

(207) ROAD SECTION NO: ..........008P (7) FACILITY CARRIED: .................. NEWFOUND GAP ROAD

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5460008P0000000

(209) WITHIN NPS BNDRY?: .......YES (9) LOCATION: ................................ 1.9 MILES NORTH FROM NEW

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

(211) PROJECT NO(S): ................1A1 (11) MILE POINT: .............................12.98 (KM PT 20.89)

(212) DRAWING NUMBERS: ....... 1017C (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: .. 3 - POSSIBLY 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:

1 - CONCRETE

11 - ARCH - DECK

30.0 FT (9.1 M)

30.0 FT (9.1 M)

2 - SPREAD FTG ON BEARING MAT'L

2 - SPREAD FTG ON BEARING MAT'L

6 - N/A

6 - N/A

N - NOT APPLICABLE

(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: .. N - NOT APPLICABLE

B) TYPE MEMBRANE: ................. N - NOT APPLICABLE

C) TYPE PROTECTION: .............. N - NOT APPLICABLE

(218) IS SALT USED?: ..................... YES

LOAD RATING AND POSTING

(31) DESIGN LOAD: ................. 0 - UNKNOWN (41) LOAD RESTRICTION: ......... A - OPEN, NO RESTRICTION

(66) INVENTORY RATING: ...... 99.9 TONS (99.9 METRIC TONS) (70) BRIDGE POSTING: .............. 5 - NO POSTING REQUIRED

(64) OPERATING RATING: ...... 99.9 TONS (99.9 METRIC TONS)

INSPECTION DATES

(90) INSPECTION DATE: 6/18 (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. :

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5460-008P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(16) LATITUDE: ............................. 35°37'26.90"

(17) LONGITUDE: ......................... 83°25'01.50"

(19) DETOUR LENGTH: ............... 90 MI (145 KM)

(28A) LANES ON STRUCT:

(28B) LANES UNDER STRUCT: ... 00

(42A) SERVICE ON: ..................... 1 - HIGHWAY

(42B) SERVICE UNDER: .............. 5 - WATERWAY

(29) AVG. DAILY TRAFFIC:

(30) YEAR OF ADT:

(114) FUTURE ADT:

(115) YEAR OF FUTURE ADT:

(101) PARALLEL STRUCTURE: ... N - NONE

(38) NAVIGATION CONTROL?: ... 0

(39) VERTICAL CLEARANCE: ...... 0.0 FT (0.0 M)

(40) HORIZ. CLEARANCE: ........... 0.0 FT (0.0 M)

(111) ABUT. OR PIER PROT:

LATERAL UNDERCLEARANCE:

(55) RIGHT: ....................... 0.0 FT (0.0 M)

(56) LEFT: ......................... 0.0 FT (0.0 M)

(51) CURB TO CURB WIDTH:

(52) DECK WIDTH:

(32) APPR. ROADWAY WIDTH:

(213) APPR. PAVEMENT WIDTH:

LEFT SHOULDER:

RIGHT SHOULDER:

(33) BRIDGE MEDIAN:

(34) SKEW ANGLE:

(35) DECK FLARE?:

(47) TOTAL HORIZ. CLEARANCE:

(50) SIDEWALKS:

LEFT :

RIGHT :

(214) BRIDGE RAIL TYPE:

RAIL CONFIGURATION:

MATERIAL:

DESIGN TYPE:

(215) BRIDGE RAIL HEIGHT:

(53) MIN. VRT. CLEAR. OVER DECK:

(54) MIN. VRT. UNDERCLEARANCE:

36.0 FT (11.0 M)

39.0 FT (11.9 M)

36.0 FT (11.0 M)

24.0 FT (7.3 M)

4.0 FT (1.2 M)

8.0 FT (2.4 M)

0 - NO MEDIAN

0 °

NO

36.0 FT (11.0 M)

0.0 FT (0.0 M)

0.0 FT (0.0 M)

3 - PARAPET ONLY

9 - OTHER

1 - CONTINUOUS RAIL

2.00 FT (0.61 M)

99.99 FT (99.99 M)

0.00 FT (0.00 M)

CONDITION AND APPRAISAL DATA, PROPOSED IMPROVEMENTS, AND COST

(58) DECK: ................................. N

(59) SUPERSTRUCTURE:

(60) SUBSTRUCTURE:

(61) CHANNEL:

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

(222) APPROACHES:

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

(36) TRAFFIC SAFETY FEAT: ... 1101

(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

4 - Stable; action required to pro

2 - REHAB/RECONSTRUCTION

D - MINOR

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

2012 - ROADWAY REPAVED, SOUTH APPROACH EAST TIMBER GUARDRAIL INSTALLED.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

https://83�25'01.50 https://35�37'26.90

APPENDIX STRUCTURE NO. 5460-008P

PHOTOGRAPHS STRUCTURE NO. 5460-008P

PHOTO #1 - LOOKING SOUTH TOWARD NEWFOUND GAP

FLOW

PHOTO #2 - WEST (DOWNSTREAM) SIDE

PHOTO #3 - GENERAL TOP SIDE VIEW LOOKING SOUTH

PHOTO #4 - GENERAL UNDERSIDE VIEW LOOKING EAST

PHOTO #5 - LONGITUDINAL CRACKING ALONG SOUTHBOUND LANE

PHOTO #6 - DETERIORATION OF PARAPET MASONRY MORTAR JOINTS

AT NORTHWEST PARAPET END

PHOTO #7 - DISPLACED STONES AT NORTHWEST PARAPET END

PHOTO #8 - BROKEN TIMBER RAIL AND DISPLACED POSTS AT

SOUTHWEST APPROACH GUARDRAIL

PHOTO #9 - GENERAL VIEW OF SOUTH ABUTMENT

PHOTO #10 - CRACKING WITH EFFLORESCENCE ON SOUTH ABUTMENT

BREASTWALL AT EAST END

PHOTO #11 - SPALLING WITH EXPOSED REBAR ALONG WEST

CONSTRUCTION JOINT NEAR SOUTH ABUTMENT

PHOTO #12 - TYPICAL EFFLORESCENCE ON RING STONES, WEST RING

STONES NEAR SOUTH ABUTMENT SHOWN

PHOTO #13 - MAP CRACKING OF ARCH UNDERSIDE NEAR NORTH

ABUTMENT

PHOTO #14 - TYPICAL MISSING MORTAR BETWEEN STONES ON

ABUTMENT BREASTWALLS, EAST END OF NORTH ABUTMENT

BREASTWALL SHOWN

PHOTO #15 - TYPICAL DETERIORATION OF VERTICAL EXPANSION

JOINT FILLER WITH VEGETATION GROWTH IN JOINTS, NORTHEAST

VERTICAL JOINT SHOWN

PHOTO #16 - SCOUR AT DOWNSTREAM END OF SOUTH ABUTMENT

WITH FOOTING EXPOSED; NOTE RIPRAP WASHED OUT

PHOTO #17 - LOOKING UPSTREAM FROM DECK; NOTE TREE ACROSS

UPSTREAM CHANNEL

PHOTO #18 - LOOKING DOWNSTREAM FROM DECK