GRSM 14(3)121(1)ETC_BIP_STR 5460-047P.pdf

STRUCTURE SUMMARY STRUCTURE NO. 5460-047P

ELKMONT ROAD BRIDGE AT LITTLE RIVER INSPECTION DATE: 6/20/18

BRIDGE IDENTIFICATION AND DESCRIPTION

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

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

# OF BEAMS, MAIN SPAN: .. 1 STRUCT. TOTAL LENGTH: .. 115.0 FT (35.1 M)

DECK TYPE: ......................... NOT APPLICABLE MAX. SPAN LENGTH: .......... 25.0 FT (7.6 M)

WEARING SURFACE: .......... NOT APPLICABLE DECK WIDTH: ...................... 21.5 FT (6.6 M)

ABUT. FOUNDATIONS: ........ SPREAD FTG ON BEARING MAT'L CURB TO CURB WIDTH: ..... 18.0 FT (5.5 M)

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

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

PROJ./PLAN REF. NO: ......... 3B15 / 1368 SKEW ANGLE: ..................... 0 °

NPS ROAD CLASS: .............. 3 - SPECIAL PURPOSE FRACTURE CRITICAL: ........ NO

STRUCTURE HISTORY: ...... 2012-BRIDGE AND APPROACHES REPAVED.

LOCATION

GREAT SMOKY MOUNTAINS NATIONAL PARK MILE POINT: ..................... 0.54 (KM PT 0.87)

STATE: ................................. TENNESSEE LOCATION: 0.1 MILES NORTH FROM NPS ROUTE

133.FACILITY CARRIED: ............ ELKMONT ROAD

FEATURE INTERSECTED: .. LITTLE RIVER

STRUCTURE EVALUATION SUMMARY

This four-span corrugated steel plate arch bridge is in fair condition. The main problems include scour along the north abutment with 15" of the footing exposed; scour along the north and center piers; deterioration of the abutment and pier wall masonry mortar joints with several washed out; and drift accumulation in the upstream channel. Other problems include deterioration of the bituminous coating with rusting, some areas with section loss, of the steel arch plates at the pier interfaces; erosion at the northwest and southwest approach parapet ends; and tree growth west of south pier.

Corrective action 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: J. PARRISH, P. SWANN (VOLKERT, INC.)

CONDITION ASSESSMENT:

JESSE PARRISH, E.I., 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. 5460-047P

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.

C226 PRIORITY OF IMPROVEMENT

ITEM

NO.

ROUTINE MAINTENANCE QTY. UNIT UNIT

COST

PRELIM.

COST

ESTIMATE

222.7 INSTALL REFLECTIVE OBJECT MARKERS AT APPROACH PARAPET ENDS. 4 EA

PRELIM. MAINTENANCE TOTAL :

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS)

QTY. UNIT

UNIT

COST

PRELIM. COST

ESTIMATES

REHAB. RECONSTR.

60.9 REPAIR SCOUR ALONG ABUTMENTS AND PIERS WITH ENGINEERED

RIPRAP.

1 LS

58.6, 59.8, 60.1,6,13,1

5, 222.3

REPOINT MASONRY MORTAR JOINTS AS NECESSARY. 1 LS

59.3 CLEAN EXPOSED STEEL ARCH PLATES AND RECOAT WITH

BITUMINOUS COATING.

1 LS

61.4 REMOVE DRIFT IN UPSTREAM CHANNEL. REMOVE TREE WEST OF

SOUTH PIER.

1 LS

222.5,6 STABILIZE EROSION OF APPROACH EMBANKMENTS. 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. 5460-047P

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 F G

N G

F N G N G F N N F G N

N(VEGETATION)

F N F N F G

F(VEGETATION)

11.

10.

9.

8.

7.

6.

5.

4.

3.

2.

1.

12.

13.

14.

15.

16.

17.

18.

19.

58.6, 222.3 MINOR TO MODERATE DETERIORATION OF PARAPET MASONRY

MORTAR JOINTS; MINOR VEGETATION GROWTH IN JOINTS. MINOR

SEPARATION OF END BLOCK AT NORTHEAST CORNER.

59.3,8 SUPERSTRUCTURE CONSISTS OF GALVANIZED STEEL ARCH

PLATES WITH BITUMINOUS COATING.

MODERATE TO SEVERE DETERIORATION OF BITUMINOUS COATING

EXPOSING GALVANIZED STEEL ARCH PLATES; MINOR TO

MODERATE CRACKING AND DETERIORATION ELSEWHERE.

MINOR TO MODERATE RUSTING OF STEEL ARCH PLATES AT

INTERFACE WITH PIERS. HEAVY RUSTING AND MINOR SECTION

LOSS FROM STEEL ARCH PLATES AT CENTER PIER INTERFACE ON

SOUTH FACE. MODERATE EFFLORESCENCE ON STEEL ARCH PLATE

ABOVE SOUTH ABUTMENT PIER WALL; MINOR ELSEWHERE AND

RANDOMLY LOCATED.

HEAVY EFFLORESCENCE ON FASCIA RING STONE MORTAR JOINTS.

MINOR DETERIORATION OF MORTAR JOINTS WITH

EFFLORESCENCE AT BOTH SPANDREL WALLS; ISOLATED AREAS OF

MINOR VEGETATION GROWTH.

60.1,6 MODERATE DETERIORATION OF ABUTMENT BREASTWALL AND

WINGWALL MASONRY MORTAR JOINTS WITH MINOR TO MODERATE

EFFLORESCENCE; ISOLATED AREAS OF HEAVY EFFLORESCENCE

ON BREASTWALLS. SEVERAL MORTAR JOINTS WASHED OUT AT

WATERLINE.

60.5,9 MINOR TO MODERATE SCOUR ALONG FACE OF NORTH ABUTMENT

WITH UP TO 15" OF FOOTING EXPOSED FOR FULL LENGTH.

60.12,19 MINOR VEGETATION GROWTH ON WINGWALLS. LARGE TREE

GROWTH ENCROACHING WEST SIDE OF SOUTH PIER.

60.13,15 MODERATE TO SEVERE DETERIORATION OF PIER MASONRY

MORTAR JOINTS WITH MINOR TO MODERATE EFFLORESCENCE;

SEVERAL MORTAR JOINTS WASHED OUT AT WATERLINE.

SOUTH PIER STONE DISLODGED AT EAST END.

G G N F G N

N

N

N

N

FIELD INSPECTION REPORT STRUCTURE NO. 5460-047P

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 5

G G N P N

HIGH

SUFF

13 FT.

ROCK, SAND, STONES

222. APPROACHES 5

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 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

N N N

60.17 MODERATE SCOUR ALONG SOUTH FACE OF CENTER PIER; MINOR

AT BOTH SIDES OF NORTH PIER. MODERATE AGGRADATION

PRESENT ALONG NORTH FACE OF NORTH AND CENTER PIERS.

61.2 SEE BRIDGE FILE FOR SCOUR EVALUATION.

61.4 LARGE DRIFT ACCUMULATION AT UPSTREAM SIDE OF SPANS #2

THROUGH #4; MINOR UPSTREAM OF SOUTH PIER.

222.4,5 MINOR EROSION ON WEST SIDE OF SOUTH APPROACH

EMBANKMENT, WITH APPROACH PARAPET END UNDERMINED UP

TO 10".

MODERATE AREA OF EROSION, UP TO 13" DROP-OFF, AT WEST

SHOULDER OF NORTH APPROACH; APPROACH PAVEMENT

UNDERMINED UP TO 7".

222.7 REFLECTIVE OBJECT MARKERS NOT PROVIDED AT APPROACH

PARAPET ENDS.

36 BRIDGE AND APPROACH PARAPET HEIGHT OF 2'-0", AT SOME

LOCATIONS, DOES NOT MEET CURRENT SAFETY GUIDELINES OF

2'-3" FOR TRAFFIC BARRIERS.

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. 5460-047P

TRUCK TYPE

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

TONS METRIC TONS TONS METRIC TONS

H 24 22 41 37

HS 44 40 73 66

TYPE 3 30 27 51 46

TYPE 3S2 44 40 73 66

TYPE 3-3 49 44 82 74

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: COVER OVER STRUCTURE

REMARKS: SEE BRIDGE FILE FOR LOAD RATING CALCULATIONS.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5460-047P

STRUCTURE IDENTIFICATION

(201) PARK: GREAT SMOKY MOUNTAINS NATIONAL PARK

(202) STRUCTURE NAME: .......... ELKMONT ROAD BRIDGE AT LITTLE RIVE

(203) STRUCTURE KIND: ............1 - BRIDGE

(204) STRUCTURE NUMBER: ..... 5460-047P

(205) NPS REGION: .................... 4 - SOUTHEAST

(206) ROUTE CODE NUMBER: ... 18

(207) ROAD SECTION NO: ..........047P

(208) NPS ROAD CLASS: ............ 3 - SPECIAL PURPOSE

(209) WITHIN NPS BNDRY?: .......YES

(210) OPERATING UNIT: ............. N. DIST.

(211) PROJECT NO(S): ................3B15

(212) DRAWING NUMBERS:

(21) MAINTAINED BY: ................. 66 - NATIONAL PARK SERVICE

(22) OWNER: ............................... 66 - NATIONAL PARK SERVICE

(1) STATE:

(2) STATE HWY. AGENCY DIST:

(3) COUNTY CODE:

(4) CITY/PLACE CODE:

(5) INVENTORY ROUTE:

(6) FEATURES INTERSECTED:

(7) FACILITY CARRIED:

(8) STATE STRUCTURE NO:

(9) LOCATION:

(10) INV. RTE. - MIN. VERT. CLR: ..

(11) MILE POINT:

(27) YEAR BUILT:

(106) YEAR RECONSTRUCTED:

(20) TOLL:

(37) HISTORICAL DESIGNATION: ..

474 - TENNESSEE (TN)

155 - SEVIER

164000180

LITTLE RIVER

ELKMONT ROAD

5460047P0000000

0.1 MILES NORTH FROM NPS

99.99 FT (99.99 M)

0.54 (KM PT 0.87)

N/A

3 - FREE ROAD

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:

3 - STEEL

11 - ARCH - DECK

25.0 FT (7.6 M)

115.0 FT (35.1 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: ...... 44.0 TONS (39.9 METRIC TONS) (70) BRIDGE POSTING: .............. 5 - NO POSTING REQUIRED

(64) OPERATING RATING: ...... 73.0 TONS (66.2 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. 5460-047P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(16) LATITUDE: ............................. 35°39'17.40"

(17) LONGITUDE: ......................... 83°34'50.50"

(19) DETOUR LENGTH: ............... 0 MI (0 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:

18.0 FT (5.5 M)

21.5 FT (6.6 M)

29.0 FT (8.8 M)

19.0 FT (5.8 M)

5.0 FT (1.5 M)

5.0 FT (1.5 M)

0 - NO MEDIAN

0 °

NO

18.0 FT (5.5 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: ... 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

4 - Stable; action required to pro

2 - REHAB/RECONSTRUCTION

C - MODERATE

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

2012-BRIDGE AND APPROACHES REPAVED.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

https://83�34'50.50 https://35�39'17.40

APPENDIX STRUCTURE NO. 5460-047P

PHOTOGRAPHS STRUCTURE NO. 5460-047P

FLOW

PHOTO #1 - LOOKING NORTH TOWARD ELKMONT CAMPGROUND

PHOTO #2 - WEST (DOWNSTREAM) SIDE; NOTE TYPICAL

EFFLORESCENCE ON MASONRY FASCIA

PHOTO #3 - GENERAL TOP SIDE VIEW LOOKING SOUTH

PHOTO #4 - GENERAL UNDERSIDE VIEW OF SPAN #4 LOOKING

NORTHWEST

PHOTO #5 - TYPICAL DETERIORATION OF PARAPET MASONRY MORTAR

JOINTS, EAST PARAPET SHOWN; NOTE VEGETATION GROWTH

PHOTO #6 - EROSION ALONG WEST SHOULDER OF NORTH APPROACH;

NOTE APPROACH PAVEMENT UNDERMINING

PHOTO #7 - GENERAL VIEW OF SOUTH ABUTMENT; NOTE

EFFLORESCENCE

PHOTO #8 - SOUTH PIER STONE DISLODGED AT EAST END; NOTE

DRIFT ACCUMULATION

PHOTO #9 - TREE GROWTH ENCROACHING WEST SIDE OF SOUTH

PIER

PHOTO #10 - RUSTING AND SECTION LOSS OF ARCH STEEL PLATES AT

SOUTH FACE OF CENTER PIER INTERFACE

PHOTO #11 - TYPICAL RUSTING OF ARCH STEEL PLATES AT PIER

INTERFACES, SOUTH FACE OF NORTH PIER SHOWN; NOTE TYPICAL

DETERIORATION OF MASONRY MORTAR JOINTS

PHOTO #12 - TYPICAL SCOUR ALONG PIERS, SOUTH FACE OF NORTH

PIER SHOWN

PHOTO #13 - SCOUR AT NORTH ABUTMENT; NOTE EXPOSED FOOTING

PHOTO #14 - TYPICAL AGGRADATION ALONG PIERS, NORTH PIER IN

SPAN #4 SHOWN

PHOTO #15 - GENERAL VIEW OF NORTH ABUTMENT; NOTE TYPICAL

DETERIORATION OF BITUMINOUS COATING EXPOSING GALVANIZED

STEEL

PHOTO #16 - DRIFT ACCUMULATION UPSTREAM OF SPANS #2

THROUGH #4

PHOTO #17 - LOOKING UPSTREAM THROUGH SPAN #2

PHOTO #18 - LOOKING DOWNSTREAM THROUGH SPAN #1