Bridge_Inspection_Report_5140-075P.pdf

BRIDGE INSPECTION REPORT

BIG PINE CREEK BRIDGE #1

BLUE RIDGE PARKWAY OVER BIG PINE CREEK

BLUE RIDGE PARKWAY

LN

STRUCTURE NO. 5140-075P

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 6/8/15

Report prepared by: EU

MILE POINT: 222.68

Federal Highway Administration KILOMETER POINT: 358.36 Federal Lands Bridge Office Bridge Inspection and Management Program 21400 Ridgetop Circle Sterling, Virginia 20166 https://bridge.flhd.fhwa.dot.gov

STRUCTURE SUMMARY STRUCTURE NO. 5140-075P

BIG PINE CREEK BRIDGE #1 INSPECTION DATE: 6/8/15

BRIDGE IDENTIFICATION AND DESCRIPTION

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

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

# OF BEAMS, MAIN SPAN: .. 1 STRUCT. TOTAL LENGTH: .. 30.1 FT (9.2 M)

DECK TYPE: ......................... CONCRETE CAST-IN-PLACE MAX. SPAN LENGTH: .......... 30.1 FT (9.2 M) WEARING SURFACE: .......... BITUMINOUS DECK WIDTH: ...................... 34.0 FT (10.4 M)

ABUT. FOUNDATIONS: ........ UNKNOWN CURB TO CURB WIDTH: ..... 30.0 FT (9.1 M)

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

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

PROJ./PLAN REF. NO: ......... 2A2 / NONE SKEW ANGLE: ..................... 30 °

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

STRUCTURE HISTORY: ...... 1984-JOINT REPAIR.

LOCATION

BLUE RIDGE PARKWAY MILE POINT: ..................... 222.68 (KM PT 358.36)

STATE: ................................. NORTH CAROLINA LOCATION: 0.9 MILES FROM NC ROUTE 1461

FACILITY CARRIED: ............ BLUE RIDGE PARKWAY

FEATURE INTERSECTED: .. BIG PINE CREEK

STRUCTURE EVALUATION SUMMARY

This concrete frame bridge is in fair condition overall. The main problem is deterioration of the concrete deck overhangs with cracking, delamination, and efflorescence. Other problems include deck drains that have been paved over and settlement at both approaches.

In addition, installation of a bridge rail system that meets current safety requirements should be considered.

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

INSPECTION TEAM: M. REGER, H. SALAD

CONDITION ASSESSMENT:

MICHAEL REGER, P.E., FIELD TEAM LEADER 703-948-1424

REPORT REVIEW:

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

REPORT APPROVAL: DATE: 12/31/15

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

RECOMMENDATIONS AND ESTIMATED COSTS STRUCTURE NO. 5140-075P

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.

58.7 OPEN DECK DRAINS TO RELIEVE PONDING AND WATER SEEPAGE THROUGH

DECK. INSTALL SLEEVES TO EXTEND DRAINS 2" BELOW BOTTOM OF DECK.

1 LS

PRELIM. MAINTENANCE TOTAL : $3,000

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS) QTY. UNIT UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

58.1, 59.3 REMOVE LOOSE CONCRETE FROM DECK OVERHANGS AND

REPAIR AS ORIGINALLY CONSTRUCTED.

1 LS 0

222.4,6 REPAIR SETTLEMENT AT BOTH APPROACHES. 1 LS

58, 59, 222 CONTRACT COSTS FOR MOBILIZATION, TRAFFIC CONTROL, AND

DESIGN/CONSTRUCTION ENGINEERING.

1 LS

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL :

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL:

PRELIM. REHABILITATION TOTAL:

PRELIM. RECONSTRUCTION TOTAL: ...

TOTAL ITEMIZED COSTS:

$0

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. 5140-075P

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 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.

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

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 F N N N N N G

N G

G F N G P N

N

N

G

F

58.1, 59.3 MODERATE CRACKING AND DELAMINATION ALONG SIDES OF DECK

WITH MODERATE EFFLORESCENCE FROM CRACKS. MINOR TO

MODERATE CRACKING WITH MODERATE TO SEVERE

EFFLORESCENCE ON UNDERSIDE OF DECK OVERHANGS. MINOR

CRACKING WITH EFFLORESCENCE ALONG LONGITUDINAL

CONSTRUCTION JOINTS ON UNDERSIDE OF DECK.

58.4 MODERATE SETTLEMENT OF WEARING SURFACE AT DECK SLAB

HAS BEEN PATCHED TO RAISE TO GRADE; HOWEVER, VERTICAL

MISALIGNMENT REMAINS.

58.6 MINOR TO MODERATE CRACKING ON PARAPET MASONRY MORTAR

JOINTS WITH VEGETATION GROWTH IN SOME JOINTS.

58.7 DRAIN HOLES HAVE BEEN PAVED OVER. WATER APPEARS TO POND

ALONG PARAPETS. MINOR VEGETATION GROWTH ALONG

CURBLINES.

60.1,7 MODERATE TO SEVERE SCALING OF SOUTH ABUTMENT

BREASTWALL NEAR WATERLINE. MODERATE TO SEVERE SCALING

UNDER WEEP HOLES AT SOUTH ABUTMENT. MINOR LOSS OF FILL

MATERIAL THROUGH SOUTHWEST WEEP HOLE. MINOR

EFFLORESCENCE FROM MORTAR JOINTS ON EAST SIDE OF SOUTH

ABUTMENT.

60.6 MINOR CRACKING OF WINGWALL MASONRY MORTAR JOINTS WITH

EFFLORESCENCE AND MINOR MOSS GROWTH.

60.9 MINOR EROSION ALONG WINGWALLS NEAR ABUTMENTS.

BREASTWALLS OR COLUMNS1. F

PILE BENTS 2. N

CAPS AND/OR BEARING SEATS 3. G

BACKWALLS AND/OR BULKHEADS 4. N

FOUNDATIONS 5. N

WINGWALLS 6. G

WEEP HOLES7. G

EXPANSION JOINTS 8. N

EROSION AND/OR SCOUR9. G

SETTLEMENT OR DEFLECTION10. G

SLOPE PROTECTION11. N

OTHER 12. N

PIER(S)

WALLS AND/OR COLUMNS 13. N

PILE BENTS 14. N

CAPS AND/OR BEARING SEATS 15. N

FOUNDATIONS 16. N

EROSION AND/OR SCOUR17. N

SETTLEMENT OR DEFLECTION18. N

OTHER 19. N

FIELD INSPECTION REPORT STRUCTURE NO. 5140-075P

ITEM REFERENCE AND REMARKS

STREAM BED COMPOSITION : 9.

AVERAGE CLEAR OPENING8.

NORMAL VELOCITY 7.

ADEQUACY OF OPENING6.

OTHER 5.

WATERWAY OBSTRUCTIONS 4.

CHANNEL PROTECTION3.

EROSION AND/OR SCOUR2.

ALIGNMENT1.

61. CHANNEL 7

G G N G N

MED

SUFF

7 FT.

222.4,6 SETTLEMENT AT APPROACHES HAS BEEN PATCHED; HOWEVER,

VERTICAL MISALIGNMENT UP TO 2" CAUSING ROUGH TRANSITION

REMAINS.

36.A PARAPET HEIGHT OF 1'-8" DOES NOT MEET CURRENT HEIGHT

REQUIREMENT OF 2'-3" FOR TRAFFIC BARRIERS.

222. APPROACHES 7

OTHER 9.

ALIGNMENT8.

SIGNS 7.

SETTLEMENT6.

EROSION5.

SURFACING 4.

APPROACH GUARDRAIL 3.

RELIEF JOINTS2.

1. APPROACH SLABS 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 ENDS D.

APPROACH GUARDRAILS C.

TRANSITIONS B.

BRIDGE RAILINGSA. 0

N N N

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. 5140-075P

TRUCK TYPE

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

TONS METRIC TONS TONS METRIC TONS

H 15 14 25 23

HS 24 21 39 36

TYPE 3 21 19 34 31

TYPE 3S2 30 27 50 45

TYPE 3-3 41 37 68 61

DESIGN LOADING: H15 (M13.5)

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. 5140-075P

STRUCTURE IDENTIFICATION

(201) PARK: BLUE RIDGE PARKWAY (1) STATE: ....................................... 374 - NORTH CAROLINA (NC)

(202) STRUCTURE NAME: .......... BIG PINE CREEK BRIDGE #1 (2) STATE HWY. AGENCY DIST:

(203) STRUCTURE KIND: ............1 - BRIDGE (3) COUNTY CODE: ........................ 005 - ALLEGHANY

(204) STRUCTURE NUMBER: ..... 5140-075P (4) CITY/PLACE CODE:

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

(206) ROUTE CODE NUMBER: ... 1 (6) FEATURES INTERSECTED:....... BIG PINE CREEK

(207) ROAD SECTION NO: .......... 075P (7) FACILITY CARRIED: .................. BLUE RIDGE PARKWAY

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5140075P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 0.9 MILES FROM NC ROUTE

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

(211) PROJECT NO(S): ................ 2A2 (11) MILE POINT: ............................. 222.68 (KM PT 358.36)

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

1 - CONCRETE

07 - FRAME

30.1 FT (9.2 M)

30.1 FT (9.2 M)

0 - UNKNOWN

0 - UNKNOWN

6 - N/A

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: .. 6 - BITUMINOUS

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

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

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

LOAD RATING AND POSTING

(31) DESIGN LOAD: ................. 2 - H15 (M13.5) (41) LOAD RESTRICTION: ......... A - OPEN, NO RESTRICTION

(66) INVENTORY RATING: ...... 23.5 TONS (21.4 METRIC TONS) (70) BRIDGE POSTING: .............. 5 - NO POSTING REQUIRED

(64) OPERATING RATING: ...... 39.3 TONS (35.7 METRIC TONS)

INSPECTION DATES

(90) INSPECTION DATE: 6/15 (91) FREQ. OF INSP: 24 MONTHS (92 / 93) CRITICAL FEATURE INSPECTION (CFI):

(219) ADD. STUDIES NEEDED: Y - 1 - DECK SURVEY (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. 5140-075P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(16) LATITUDE: ............................. 36°30'08.40" (51) CURB TO CURB WIDTH: ........... 30.0 FT (9.1 M)

(17) LONGITUDE: ......................... 80°57'15.50" (52) DECK WIDTH: ............................ 34.0 FT (10.4 M)

(19) DETOUR LENGTH: ............... 25 MI (40 KM) (32) APPR. ROADWAY WIDTH: ........ 28.0 FT (8.5 M)

(28A) LANES ON STRUCT: .......... 02 (213) APPR. PAVEMENT WIDTH: ..... 20.0 FT (6.1 M)

(28B) LANES UNDER STRUCT: ... 00 LEFT SHOULDER: .................. 4.0 FT (1.2 M)

(42A) SERVICE ON: ..................... 1 - HIGHWAY RIGHT SHOULDER: ................ 4.0 FT (1.2 M)

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

(29) AVG. DAILY TRAFFIC: .......... 1347 (34) SKEW ANGLE: ............................ 30 °

(30) YEAR OF ADT: ...................... 2013 (35) DECK FLARE?: ........................... NO

(114) FUTURE ADT: ..................... 1482 (47) TOTAL HORIZ. CLEARANCE: .... 30.0 FT (9.1 M)

(115) YEAR OF FUTURE ADT: ..... 2033 (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: ......... 3 - PARAPET ONLY

(111) ABUT. OR PIER PROT: ....... MATERIAL: .............................. 9 - OTHER

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

(55) RIGHT: ....................... 0.0 FT (0.0 M) (215) BRIDGE RAIL HEIGHT: ............ 1.67 FT (0.51 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: ... 0NNN

(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

2 - REHAB/RECONSTRUCTION

C - MODERATE

$0

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

1984-JOINT REPAIR.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

APPENDIX STRUCTURE NO. 5140-075P

PHOTOGRAPHS STRUCTURE NO. 5140-075P

PHOTO #1 - LOOKING SOUTHBOUND TOWARD BLOWING ROCK

FLOW

PHOTO #2 - WEST (DOWNSTREAM) SIDE

PHOTO #3 - GENERAL TOPSIDE VIEW LOOKING NORTH; NOTE DIP ON

BOTH APPROACHES WITH ASPHALT TRANSITION RAMP

PHOTO #4 - ASPHALT TRANSITION RAMP ON APPROACH PAVEMENT,

SOUTH APPROACH SHOWN; NOTE ALSO NORTH APPROACH SIMILAR

PHOTO #5 - SETTLEMENT IN NORTH APPROACH PAVEMENT, SOUTH

APPROACH SIMILAR

PHOTO #6 - TYPICAL CONDITION OF CURBLINES, EAST CURBLINE

SHOWN; NOTE ALSO DEBRIS ACCUMULATION, AND VEGETATION

GROWTH

PHOTO #7 - TYPICAL CONDITION OF PARAPET MASONRY MORTAR

JOINTS, NORTHEAST PARAPET SHOWN

PHOTO #8 - TYPICAL CONDITION OF PARAPET ENDS, NORTHEAST

PARAPET END SHOWN

PHOTO #9 - VIEW OF CLEAR ZONE AT NORTHWEST PARAPET END

PHOTO #10 - GENERAL UNDERSIDE VIEW LOOKING SOUTH

PHOTO #11 - TYPICAL LONGITUDINAL CRACKING WITH

EFFLORESCENCE ON UNDERSIDE OF DECK, EAST SIDE OF DECK

SHOWN

PHOTO #12 - TYPICAL FINISH COAT PEELING AWAY ON DECK SIDES,

EAST SIDE SHOWN; NOTE ALSO CRACKING AND DELAMINATION ON

EAST EDGE OF DECK SIDE

PHOTO #13 - WATER LEAKAGE FROM DECK

DRAINAGE

PHOTO #14 - TYPICAL CRACKING WITH

EFFLORESCENCE ON UNDERSIDE OF DECK

OVERHANG, WEST DECK OVERHANG SHOWN,

EAST DECK OVERHANG SIMILAR

PHOTO #15 - CRACKING AND DELAMINATION ON WEST EDGE OF DECK

PHOTO #16 - GENERAL VIEW OF NORTH ABUTMENT

PHOTO #17 - EFFLORESCENCE ON EAST SIDE OF SOUTH ABUTMENT;

NOTE EROSION OF SLOPE ALONG WINGWALL

PHOTO #18 - SCALING ALONG BOTTOM OF SOUTH ABUTMENT

BREASTWALL NEAR EAST END

PHOTO #19 - TYPICAL CONDITION OF WEEP HOLES ON SOUTH

ABUTMENT BREASTWALL; NOTE LOSS OF AGGREGATE DUE TO

SCALING

PHOTO #20 - GENERAL VIEW OF SOUTH ABUTMENT

PHOTO #21 - GENERAL VIEW OF WINGWALLS,

SOUTHWEST WINGWALL SHOWN; NOTE

CRACKING AND EFFLORESCENCE

PHOTO #22 - UPSTREAM CHANNEL

PHOTO #23 - DOWNSTREAM CHANNEL