Bridge Inspection Rpt_STR 5460-006P.pdf

STRUCTURE SUMMARY STRUCTURE NO. 5460-006P

LOWER 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: .. 84.0 FT (25.6 M)

DECK TYPE: ......................... NOT APPLICABLE MAX. SPAN LENGTH: .......... 36.0 FT (11.0 M)

WEARING SURFACE: .......... NOT APPLICABLE DECK WIDTH: ...................... 34.5 FT (10.5 M)

ABUT. FOUNDATIONS: ........ SPREAD FTG ON BEARING MAT'L CURB TO CURB WIDTH: ..... 30.5 FT (9.3 M)

PIER FOUNDATION(S): ........ SPREAD FTG ON BEARING MAT'L YEAR BUILT:

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

PROJ./PLAN REF. NO: ......... 1A1 / 1065A SKEW ANGLE: ..................... 30 °

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

STRUCTURE HISTORY: ...... 2015 - ROADWAY REPAVED.

LOCATION

GREAT SMOKY MOUNTAINS NATIONAL PARK MILE POINT: ..................... 9.69 (KM PT 15.59)

STATE: ................................. TENNESSEE LOCATION: 7.9 MILES SOUTH OF SUGARLANDS VISITOR CENTER OR 5.1 MILES NORTHWEST FACILITY CARRIED: ............ NEWFOUND GAP ROAD

FROM NEWFOUND GAP.

FEATURE INTERSECTED: .. WALKER CAMP PRONG

STRUCTURE EVALUATION SUMMARY

This concrete arch bridge is in fair condition overall. Problems include deteriorated masonry mortar joints throughout the structure; an exposed footing along the north face and upstream side of the pier; and deteriorated concrete with exposed rebar on the underside of both arches at several locations. Additional problems include a lack of object markers at the bridge corners and debris accumulation that has completely blocked the drop inlet at the southwest corner.

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. 5460-006P

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

222.7 INSTALL REFLECTIVE OBJECT MARKERS AT BRIDGE CORNERS. 4 EA

58.7 PERIODICALLY REMOVE DEBRIS FROM DROP INLET AT SOUTHWEST CORNER

AND ALONG PARAPETS.

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, 60.1,13,19, 222.3

CLEAN AND REPOINT MORTAR JOINTS AS NEEDED. 1 LS

59.3 CLEAN AND SEAL EXPOSED REBAR WITH APPROVED PROTECTIVE

COATING; REPAIR DELAMINATED CONCRETE ON ARCH

UNDERSIDES.

1 LS

60.16,17 REPAIR SCOUR ALONG NORTH FACE AND ON EAST (UPSTREAM)

SIDE OF PIER WITH ENGINEERED RIPRAP.

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. 5460-006P

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

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

G N N G F G

G(ICEBREAKER)

11.

10.

9.

8.

7.

6.

5.

4.

3.

2.

1.

12.

13.

14.

15.

16.

17.

18.

19.

(SPREAD FTG)

58.6, 222.3 MODERATE CRACKING AND DETERIORATION OF PARAPET

MASONRY MORTAR JOINTS AT SEVERAL LOCATIONS. MINOR TO

MODERATE VEGETATION GROWTH IN SOME JOINTS; MODERATE

MOSS GROWTH ON MASONRY.

58.7 MINOR DEBRIS ACCUMULATION WITH MOSS AND VEGETATION

GROWTH ALONG PARAPETS HINDERS DRAINAGE SLIGHTLY. DECK

DRAINS COVERED WITH PAVEMENT. SOUTHEAST DROP INLET

PARTIALLY CLOGGED.

59.3 MINOR TO MODERATE LONGITUDINAL AND TRANSVERSE CRACKING

WITH EFFLORESCENCE AND RUST STAINING ON UNDERSIDE OF

ARCHES AND RING STONES, ESPECIALLY AT CONSTRUCTION

JOINTS.

MINOR TO MODERATE DELAMINATION AND SPALLING WITH

EXPOSED REBAR ON ARCH UNDERSIDE, BOTH SPANS.

APPROXIMATELY 3' X 3' SPALLED AND DELAMINATED AREA ON

SOUTH ARCH UNDERSIDE NEAR PIER AT EAST SIDE. MINOR TO

MODERATE DELAMINATION AND SPALLING WITH EXPOSED REBAR

ON SOUTH ARCH UNDERSIDE AT PIER ALONG WEST

CONSTRUCTION JOINT. MINOR HONEYCOMBING ON SOUTH ARCH

UNDERSIDE ALONG TOP OF SOUTH ABUTMENT BREASTWALL.

MODERATE SPALLING WITH EXPOSED REBAR ON UNDERSIDE OF

NORTH ARCH NEAR WEST SIDE. MINOR HONEYCOMBING ON

NORTH ARCH UNDERSIDE AT ISOLATED LOCATIONS.

MINOR VEGETATION AND MOSS GROWTH ON SPANDREL WALLS AT

JUNCTION WITH PARAPETS.

60.1,13,19 MODERATE TO HEAVY EFFLORESCENCE ON ABUTMENT

BREASTWALLS, PIER WALLS, AND ICEBREAKER.

MINOR TO MODERATE DETERIORATION OF MASONRY MORTAR

JOINTS AT WATERLINE OF ABUTMENT BREASTWALLS, PIER WALLS,

AND ICEBREAKER.

60.6,8 MODERATE DETERIORATION OF MORTAR JOINTS, RESULTING IN

MINOR VEGETATION GROWTH IN WINGWALLS AND IN NORTH

VERTICAL JOINTS. MINOR CRACKING WITH EFFLORESCENCE AND

MOSS GROWTH ALONG ALL WINGWALLS. VERTICAL JOINT FILLER

LOOSE AT NORTH VERTICAL JOINTS.

G G N F P N

N

N

N

N

FIELD INSPECTION REPORT STRUCTURE NO. 5460-006P

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 G N F

G(FLOOD GAUGE)

MED

SUFF

11 FT.

STONES, SAND, SILT

222. APPROACHES 7

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 G G N G 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

60.9 MINOR EROSION ALONG WEST WINGWALLS.

60.16,17 MODERATE SCOUR HAS EXPOSED PIER FOOTING APPROXIMATELY

27" H X 5.5' L ON UPSTREAM SIDE X 21' L X 12" H ON NORTH SIDE OF

PIER.

61.1,4 NORMAL FLOW IS THROUGH NORTH SPAN. MODERATE SEDIMENT

AND BOULDER ACCUMULATION UNDER SOUTH SPAN. HEAVY

VEGETATION AND BOULDER ACCUMULATION ON DOWNSTREAM

SIDE OF PIER.

61.5 FLOOD GAUGE AT WEST SIDE OF NORTH ABUTMENT.

222.7 REFLECTIVE OBJECT MARKERS NOT PROVIDED AT BRIDGE

CORNERS.

36.A,C HEIGHT OF PARAPETS AND APPROACH GUARDWALLS IS 1'-10" DUE

TO REPEATED OVERLAYS. PARAPET NO LONGER MEETS MINIMUM

SAFETY GUIDELINES FOR TRAFFIC BARRIER HEIGHT OF 2'-3".

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. 5460-006P

TRUCK TYPE

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

TONS METRIC TONS TONS METRIC TONS

H 112 102 186 169

HS 208 189 300 272

TYPE 3 151 137 253 230

TYPE 3S2 261 237 300 272

TYPE 3-3 300 272 300 272

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: 5/16

LOAD RATING CONTROLLED BY: MOMENT

REMARKS: SEE BRIDGE FILE FOR LOAD RATING CALCULATIONS.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5460-006P

STRUCTURE IDENTIFICATION

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

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

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

(204) STRUCTURE NUMBER: ..... 5460-006P (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: ..........006P (7) FACILITY CARRIED: .................. NEWFOUND GAP ROAD

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5460006P0000000

(209) WITHIN NPS BNDRY?: .......YES (9) LOCATION: ................................ 7.9 MILES SOUTH OF SUGAR

(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: .............................9.69 (KM PT 15.59)

(212) DRAWING NUMBERS: ....... 1065A (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

36.0 FT (11.0 M)

84.0 FT (25.6 M)

2 - SPREAD FTG ON BEARING MAT'L

2 - SPREAD FTG ON BEARING MAT'L

2 - SPREAD FTG ON BEARING MAT'L

2 - SPREAD FTG ON BEARING MAT'L

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: ................. 0 - NONE

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

(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. 5460-006P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(16) LATITUDE: ............................. 35°38'00.20"

(17) LONGITUDE: ......................... 83°27'40.10"

(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:

30.5 FT (9.3 M)

34.5 FT (10.5 M)

33.0 FT (10.1 M)

22.5 FT (6.9 M)

5.0 FT (1.5 M)

5.0 FT (1.5 M)

0 - NO MEDIAN

30 °

NO

30.5 FT (9.3 M)

0.0 FT (0.0 M)

0.0 FT (0.0 M)

3 - PARAPET ONLY

9 - OTHER

1 - CONTINUOUS RAIL

1.83 FT (0.56 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: ... 0101

(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:

2015 - ROADWAY REPAVED.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

https://83�27'40.10 https://35�38'00.20

APPENDIX STRUCTURE NO. 5460-006P

PHOTOGRAPHS STRUCTURE NO. 5460-006P

PHOTO #1 - LOOKING NORTH TOWARD GATLINBURG

FLOW

PHOTO #2 - EAST (UPSTREAM) SIDE

PHOTO #3 - GENERAL TOP SIDE VIEW LOOKING NORTH

PHOTO #4 - GENERAL UNDERSIDE VIEW OF SOUTH BARREL LOOKING

EAST; NOTE CRACKING WITH EFFLORESCENCE

PHOTO #5 - TYPICAL OPENING ON OUTSIDE OF BRIDGE BARRIER,

EAST BRIDGE RAIL SHOWN; NOTE INSIDE OPENING PAVED OVER

BLOCKING DRAINAGE

PHOTO #6 - TYPICAL MOSS AND VEGETATION GROWTH ALONG

PARAPET JOINTS; NOTE DEBRIS ACCUMULATION CLOGGING INLET

PHOTO #7 - GENERAL VIEW OF SOUTH ABUTMENT

PHOTO #8 - EFFLORESCENCE AND LEAKAGE ON WEST END OF SOUTH

ABUTMENT BREASTWALL

PHOTO #9 - DELAMINATION AND SPALLING WITH EXPOSED REBAR ON

SOUTH ARCH UNDERSIDE NEAR PIER

PHOTO #10 - GENERAL VIEW OF PIER, SOUTH FACE SHOWN

PHOTO #11 - PIER FOOTING EXPOSED ON UPSTREAM END DUE TO

SCOUR

PHOTO #12 - MISSING MASONRY MORTAR ON EAST END OF PIER

PHOTO #13 - SPALLING WITH EXPOSED REBAR ON EAST SIDE OF

NORTH BARREL

PHOTO #14 - TYPICAL LONGITUDINAL AND TRANSVERSE CRACKING

WITH EFFLORESCENCE ON UNDERSIDE OF ARCHES AND RING

STONES, NORTH BARREL ON WEST SIDE SHOWN

PHOTO #15 - LOOKING AT NORTHWEST CORNER OF NORTH

ABUTMENT; NOTE EFFLORESCENCE ON PIER WALLS

PHOTO #16 - TYPICAL SPALLING WITH EXPOSED REBAR AND

CRACKING WITH EFFLORESCENCE ON NORTH ARCH UNDERSIDE

NEAR NORTH ABUTMENT

PHOTO #17 - TYPICAL LONGITUDINAL AND TRANSVERSE CRACKING

WITH EFFLORESCENCE ON UNDERSIDE OF ARCHES AND RING

STONES, NORTH BARREL ON EAST SIDE SHOWN

PHOTO #18 - TYPICAL DETERIORATION OF MASONRY MORTAR JOINTS

ON SPANDREL WALLS, EAST SPANDREL WALL SHOWN

PHOTO #19 - SEDIMENT AND BOULDER ACCUMULATION UPSTREAM OF

SOUTH SPAN BLOCKING FLOW INTO SOUTH BARREL

PHOTO #20 - VEGETATION GROWTH OUT OF SPANDREL WALLS AND

VEGETATIVE ISLAND ON WEST SIDE OF PIER

PHOTO #21 - LOOKING UPSTREAM FROM DECK

PHOTO #22 - LOOKING DOWNSTREAM FROM DECK