9470-015P_Skagit_River_Bridge_2014.pdf

BRIDGE INSPECTION REPORT

SKAGIT RIVER BRIDGE

NEWHALEM CAMPGROUND ACCESS RD OVER SKAGIT RIVER

NORTH CASCADES NATIONAL PARK

LN

STRUCTURE NO. 9470-015P

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 8/14/14

Report prepared by: WD

Federal Highway Administration Federal Lands Bridge Office Bridge Inspection and Management Program 21400 Ridgetop Circle Sterling, Virginia 20166 http://www.efl.fhwa.dot.gov/FLHBO/BIP http://www.efl.fhwa.dot.gov/FLHBO/BIP

STRUCTURE SUMMARY STRUCTURE NO. 9470-015P

SKAGIT RIVER BRIDGE INSPECTION DATE: 8/14/14

BRIDGE IDENTIFICATION AND DESCRIPTION

MAIN SPAN MATERIAL:

MAIN SPAN TYPE:

# OF BEAMS, MAIN SPAN: ..

DECK TYPE:

WEARING SURFACE:

ABUT. FOUNDATIONS:

PIER FOUNDATION(S):

ABUTMENT / PIER MAT'L: ...

PROJ./PLAN REF. NO:

NPS ROAD CLASS:

STRUCTURE HISTORY:

CONCRETE CONTINUOUS

BOX GIRDER - SINGLE or SPREAD

CONCRETE CAST-IN-PLACE

NONE

N/A

SPREAD FTG ON BEARING MAT'L

N/A / CONCRETE

UNKNOWN / RG1412

2 - CONNECTOR ROAD

NO. OF MAIN SPANS:

NO. OF APPR. SPANS:

STRUCT. TOTAL LENGTH: ..

MAX. SPAN LENGTH:

DECK W IDTH:

CURB TO CURB W IDTH:

YEAR BUILT:

YEAR RECONSTRUCTED: ..

SKEW ANGLE:

FRACTURE CRITICAL:

314.0 FT (95.7 M)

100.0 FT (30.5 M)

18.5 FT (5.6 M)

14.0 FT (4.3 M)

N/A

0 °

NO

LOCATION

NORTH CASCADES NATIONAL PARK MILE POINT: ..................... 0.04 (KM PT 0.06)

STATE: ................................. WASHINGTON LOCATION: 100 feet South of Highway 20 (MP 119.9).

FACILITY CARRIED: ............ NEWHALEM CAMPGROUND ACCESS RD

FEATURE INTERSECTED: .. SKAGIT RIVER

STRUCTURE EVALUATION SUMMARY

This "bobtail" cantilever concrete box girder bridge is in generally good structural condition, and there have been no significant changes since the previous inspection. However, the bridge exhibits some problems that require attention.

These problems include widespread minor deterioration of the deck concrete, which can allow water to penetrate into the box girder; and an ongoing loss of approach embankment under the end of the bridge due to lack of abutments.

The deteriorated concrete should be removed, and the deck protected with a concrete overlay. Some erosion control measures have been installed under the bridge ends, however the erosion and the embankment loss will continue to be monitored during future inspection cycles. Consideration should be given to construction of concrete slabs at the approaches to better distribute traffic loads.

It should be noted that replacement of this one-lane bridge with a two-lane structure has been under consideration for some time. Replacement is warranted based on the expected increase in traffic due to the newly constructed visitor center, as well as future improvements and additions to the Newhalem campground facility. If the replacement bridge is not constructed, however, corrective measures should be taken as outlined in this report to help prevent the possible development of more serious or costly problems.

It should also be noted that this structure has been designated as being "scour-critical", meaning the maximum theoretical scour depth exceeds the depth of the pier footings. However, appraisal of actual scour conditions was inhibited by swift current. It is recommended that the piers be periodically inspected by the NPS for scour during periods of minimal flow discharge from the dam located upstream from the bridge.

INSPECTION TEAM: J. M. BERG, F. R. QUINONEZ

CONDITION ASSESSMENT:

JEFF M. BERG, PE, FIELD TEAM LEADER 360-619-7719

REPORT REVIEW :

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

REPORT APPROVAL: DATE: 12/31/14

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

RECOMMENDATIONS AND ESTIMATED COSTS STRUCTURE NO. 9470-015P

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 REMOVE DEBRIS FROM DECK SURFACE AND DRAINS. 1 LS $500 $500

PRELIM. MAINTENANCE TOTAL : $500

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS)

QTY. UNIT

UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

58.1,3 MILL AND OVERLAY WITH MODIFIED CONCRETE. 4,400 SF $50 $250,000 $0

222.1 REPLACE APPROACH PAVEMENT WITH CONCRETE SLAB AT BOTH

ENDS OF BRIDGE.

740 SF $60 $50,000 $0

60.17 PROVIDE RIPRAP PROTECTION ALONG BASE OF PIERS #2 AND #3

AS NEEDED.

15 CY $1,000 $0 $15,000

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL : $300,000 $15,000

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL:

PRELIM. REHABILITATION TOTAL:

PRELIM. RECONSTRUCTION TOTAL: ...

TOTAL ITEMIZED COSTS:

$15,000 $300,000 $500

$315,500

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.)

$315,500

REMARKS: Cost estimates assume that the recommended actions will be combined with similar work being performed on other structures.

Bridge may be replaced in the near future; recommendations only apply if bridge is not replaced.

FIELD INSPECTION REPORT STRUCTURE NO. 9470-015P

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

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.

F G N N N N N N G

N G

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

G N G G F G N

11.

10.

9.

8.

7.

6.

5.

4.

3.

2.

1.

12.

13.

14.

15.

16.

17.

18.

19.

(BURIED)

58.1 WIDESPREAD MINOR SCALING OF DECK SURFACE; MODERATE IN

CURBLINES AT NORTH END OF BRIDGE. WIDESPREAD SHRINKAGE

CRACKING OF DECK SURFACE IN SOUTH HALF OF BRIDGE. MINOR

POPOUTS IN DECK AT SOUTH END OF SPAN #3. MAP CRACKING AT

DECK ENDS.

MINOR TRANSVERSE CRACKING WITH EFFLORESCENCE ON

UNDERSIDE OF DECK OVERHANGS; MODERATE RUST STAINING

FROM STEEL SIDEWALK DRAINS ON DOWNSTREAM OVERHANG,

SPANS #3 AND #4. MODERATE SCALING OF EDGES OF

OVERHANGS.

SEVERAL 4" DIAMETER HOLES IN DECK; HOLES HAVE BEEN FILLED

WITH CONCRETE; MOST APPEAR TO HAVE BEEN FORMED AND ARE

SLEEVED.

5" DRAIN HOLE CUT IN DECK, SPAN #4, DIRECTLY OVER SIMILAR

HOLE IN BOTTOM SLAB OF BOX GIRDER.

58.5 MINOR TRANSVERSE CRACKING AND SCALING OF CURB AND

SIDEWALK; MINOR EFFLORESCENCE FROM CRACKS IN VERTICAL

FACES. MINOR SPALLING WITH EXPOSED REBAR AT ENDS OF

SIDEWALK. CURBS ALONG SOUTH APPROACH ARE FRACTURED

AND SPALLED DUE TO SETTLEMENT (SEE 222.6).

58.6 GALVANIZED THREE-BEAM RAILINGS; PEDESTRIAN RAILING

EXTENSION ATTACHED TO WEST RAILING. TOP RAIL CAP MISSING

AT BOTH ENDS AND RUSTED MIDDLE RAIL OF WEST RAILING.

58.7 MINOR TO MODERATE DEBRIS ACCUMULATION IN CURBLINES;

MODERATE MOSS GROWTH ON CURB AND SIDEWALK AT ENDS.

SEVERAL SCUPPERS CLOGGED, CAUSING WIDESPREAD

MODERATE PONDING IN CURBLINES. SEE ALSO 58.1,8.

58.8 UPSTREAM SIDE DECK DRAINS EMPTY DIRECTLY ONTO WATER

LINE MOUNTED ON UPSTREAM WEB OF BOX GIRDER. ELECTRIC

LINES ON DOWNSTREAM SIDE OF STRUCTURE.

59 CONCRETE CANTILEVER BOX GIRDER SUPERSTRUCTURE.

N G F G F G

N

G

G

F

INSPECTION DATE: 8/14/14

STRUCTURE NO. 9470-015P FIELD INSPECTION REPORT

SKAGIT RIVER BRIDGE

ITEM REFERENCE AND REMARKS

AVERAGE CLEAR OPENING 8.

NORMAL VELOCITY 7.

ADEQUACY OF OPENING 6.

OTHER 5.

WATERWAY OBSTRUCTIONS 4.

CHANNEL PROTECTION 3.

EROSION AND/OR SCOUR 2.

1. ALIGNMENT

61. CHANNEL 8

G G G G N

HIGH

SUFF

30 FT.

9. STREAM BED COMPOSITION :

GRAVEL, COBBLES

222. APPROACHES 6

OTHER 9.

ALIGNMENT 8.

SIGNS 7.

SETTLEMENT 6.

EROSION 5.

SURFACING 4.

APPROACH GUARDRAIL 3.

RELIEF JOINTS 2.

1. APPROACH SLABS N

N N F G F G G N

223. RETAINING WALL 7

OTHER 6.

SETTLEMENT OR DEFLECTION 5.

EROSION AND/OR SCOUR 4.

FOUNDATION 3.

WEEP HOLES 2.

1. WALL G

N N G G N

36. TRAFFIC AND SAFETY FEATURES

APPROACH GUARDRAIL ENDS D.

APPROACH GUARDRAILS C.

TRANSITIONS B.

BRIDGE RAILINGSA. 1

TRAFFIC SAFETY RATING CODES

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

1 - Meets currently acceptable standards.

N - Not applicable or a safety feature is not required.

59.1 ROCKER BEARINGS AT PIER #1 TILTED 8 DEGREES TOWARD FILL;

BEARINGS AT PIER #4 TILTED APPROXIMATELY 10 DEGREES

TOWARD FILL.

59.2 REBAR CHAIRS EXPOSED AND RUSTED IN SOME LOCATIONS ON

UNDERSIDE OF BOX GIRDER. PIECES OF WOOD WEDGED IN DRAIN

HOLES OVER PIER #4 AND BETWEEN BOX GIRDER AND BEARING

SEAT AT PIERS #1, #2, AND #3. ONE HOLE IN SPAN #3 BOX

UNDERSIDE. SEE ALSO 58.1.

60.1 SEE 223.1.

60.9,11 GABION BASKET SLOPE PROTECTION UNDER SOUTH ENDWALL

(SEE 223.1); MODERATE EROSION AT DOWNSTREAM SIDE WITH

FULL-DEPTH UNDERMINING OF ENDWALL FOR 40" WIDTH; 14"

UNDERMINING OF GABION WALL.

MODERATE UNDERMINING (UP TO 42") AT NORTH END OF

CANTILEVER SUPERSTRUCTURE, DOWNSTREAM SIDE, BEHIND

ENDWALL.

60.13 MODERATE SCALING OF PIERS #2 AND #3 AT WATERLINE.

60.15 FORM TIES REMAIN IN CONCRETE AT TOP OF PIERS.

60.17 SCOUR ALONG PIERS NOT VERIFIED DUE TO RAPID AND DEEP

CURRENT DURING INSPECTION. HYDRAULIC JUMP UNDER SPAN #2

NEAR PIER #2 AND WATER FLOW CONDITION MIGHT BE INDICATION

OF SCOUR ALONG PIERS; THIS CONDITION SHOULD BE VERIFIED

DURING LOW FLOW.

222.4,6 UP TO 1" SETTLEMENT OF APPROACH PAVEMENT ALONG NORTH

BRIDGE JOINT. MINOR TRANSVERSE CRACKING OF ASPHALT

PAVEMENT AT BOTH APPROACHES.

222.7 "ONE LANE BRIDGE" PASSAGE CONTROLLED BY SIGNAL LIGHT AT

EACH END; SIGNALS WERE FUNCTIONING AT TIME OF INSPECTION.

"ROAD CLOSED" ON OPEN GATE AT NORTH END OF BRIDGE; GATE

IS LOCKED OPEN.

223.1 WIRE BASKET RETAINING SYSTEM AT SOUTH END OF BRIDGE IN

LIEU OF ABUTMENT. STACKED ROCK WALL AT UPSTREAM CORNER

OF SOUTH ENDWALL.

36.B,C,D GALVANIZED W-BEAM APPROACH RAILINGS PRESENT;

TERMINATORS AT ENDS.

STRUCTURE LOAD RATING STRUCTURE NO. 9470-015P

TRUCK TYPE

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

TONS METRIC TONS TONS METRIC TONS

H 19 17 27 24

HS 34 30 48 43

TYPE 3 36 32 51 46

TYPE 3S2 42 38 66 59

TYPE 3-3 46 41 71 64

DESIGN LOADING: HS20 (MS18)

CAPACITY MEETS OR EXCEEDS DESIGN LOAD

X CAPACITY IS LESS THAN DESIGN LOAD

X ORIGINAL LOAD RATING CALCULATION APPLICABLE

ORIGINAL LOAD RATING CALCULATION REVISED

DATE OF LOAD RATING CALCULATION: 3/90

LOAD RATING CONTROLLED BY: MOMENT CAPACITY OF CONCRETE DECK

REMARKS:

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 9470-015P

STRUCTURE IDENTIFICATION

(201) PARK: NORTH CASCADES NATIONAL PARK (1) STATE: ....................................... 530 - WASHINGTON (WA)

(202) STRUCTURE NAME: .......... SKAGIT RIVER BRIDGE (2) STATE HWY. AGENCY DIST:

(203) STRUCTURE KIND: ............ 1 - BRIDGE (3) COUNTY CODE: ........................ 073 - WHATCOM

(204) STRUCTURE NUMBER: ..... 9470-015P (4) CITY/PLACE CODE:

(205) NPS REGION: .................... 6 - PACIFIC WEST (5) INVENTORY ROUTE:

(206) ROUTE CODE NUMBER: ... 202 (6) FEATURES INTERSECTED:....... SKAGIT RIVER

(207) ROAD SECTION NO: .......... 015P (7) FACILITY CARRIED: .................. NEWHALEM CAMPGROUND A

(208) NPS ROAD CLASS: ............ 2 - CONNECTOR ROAD (8) STATE STRUCTURE NO: .......... 9470015P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 100 feet South of Highway

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

(211) PROJECT NO(S): ................ UNKNOWN (11) MILE POINT: ............................. 0.04 (KM PT 0.06)

(212) DRAWING NUMBERS: ....... RG1412 (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

06 - BOX GIRDER - SINGLE or SPREAD

100.0 FT (30.5 M)

314.0 FT (95.7 M)

6 - N/A

6 - N/A

2 - SPREAD FTG ON BEARING MAT'L

2 - SPREAD FTG ON BEARING MAT'L

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: ......... A - OPEN, NO RESTRICTION

(66) INVENTORY RATING: ...... 34.0 TONS (30.0 METRIC TONS) (70) BRIDGE POSTING: .............. 5 - NO POSTING REQUIRED

(64) OPERATING RATING: ...... 48.0 TONS (43.0 METRIC TONS)

INSPECTION DATES

(90) INSPECTION DATE: 8/14 (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. 9470-015P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(16) LATITUDE: ............................. 48°40'19.00" (51) CURB TO CURB WIDTH: ........... 14.0 FT (4.3 M)

(17) LONGITUDE: ......................... 121°15'45.40" (52) DECK WIDTH: ............................ 18.5 FT (5.6 M)

(19) DETOUR LENGTH: ............... 199 MI (199 KM) (32) APPR. ROADWAY WIDTH: ........ 20.0 FT (6.1 M)

(28A) LANES ON STRUCT: .......... 01 (213) APPR. PAVEMENT WIDTH: ..... 14.0 FT (4.3 M)

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

(42A) SERVICE ON: ..................... 1 - HIGHWAY RIGHT SHOULDER: ................ 2.0 FT (0.6 M)

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

(29) AVG. DAILY TRAFFIC: .......... 200 (34) SKEW ANGLE: ............................ 0 °

(30) YEAR OF ADT: ...................... 2010 (35) DECK FLARE?: ........................... NO

(114) FUTURE ADT: ..................... 500 (47) TOTAL HORIZ. CLEARANCE: .... 14.0 FT (4.3 M)

(115) YEAR OF FUTURE ADT: ..... 2030 (50) SIDEWALKS:

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

(38) NAVIGATION CONTROL?: ... 0 RIGHT : ................................... 3.3 FT (1.0 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: ....... 1 - NAV PROTECTION NOT REQUIRED MATERIAL: .............................. 4 - STEEL

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

LATERAL UNDERCLEARANCE:

(55) RIGHT: ....................... 0.0 FT (0.0 M) (215) BRIDGE RAIL HEIGHT: ............ 3.08 FT (0.94 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:

(36) TRAFFIC SAFETY FEAT: ... 1111

(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

3 - Scour critical; foundations un

3 - CONSTRUCTION

C - MODERATE

$500

$300,000

$15,000

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

SPANS #1 & #5 = 36'. SPANS #2 & #4 = 87'. SPAN #3 = 100'.

APPENDIX STRUCTURE NO. 9470-015P

PHOTOGRAPHS STRUCTURE NO. 9470-015P

PHOTO #1 - LOOKING SOUTH TOWARD VISITOR CENTER

FLOW

PHOTO #2 - EAST (UPSTREAM) SIDE

PHOTO #3 - GENERAL VIEW OF DOWNSTREAM SIDEWALK AND RAIL

PHOTO #4 - GENERAL TOPSIDE VIEW OF DECK

PHOTO #5 - GENERAL TOPSIDE VIEW OF DECK

PHOTO #6 - CONCRETE DECK PATCH

PHOTO #7 - PATCHED HOLES IN DECK

PHOTO #8 - UNPATCHED 4" DIAMETER HOLE IN DECK

PHOTO #9 - LONGITUDINAL CRACKING IN TOP OF DECK OVER PIER #3

PHOTO #10 - UNPATCHED HOLE THROUGH BOX GIRDER UNDERSIDE

PHOTO #11 - STAINING ON SIDE AND UNDERSIDE OF BOX,

DOWNSTREAM SIDE OF SOUTH SPAN

PHOTO #12 - STREAMFACE SIDE OF PIER #1

PHOTO #13 - ROCKER BEARINGS AT PIER #1

PHOTO #14 - LOOKING SOUTH TOWARD PIERS #2 AND #3

PHOTO #15 - LOOKING SOUTH TOWARD PIERS #2 AND #3

PHOTO #16 - DOWNSTREAM SIDE OF BRIDGE AT PIER #2

PHOTO #17 - UPSTREAM SIDE OF BRIDGE AT PIER #3

PHOTO #18 - DOWNSTREAM SIDE OF BRIDGE AT PIER #3

PHOTO #19 - DOWNSTREAM OVERHANG AND SIDE OF BOX GIRDER AT

PIER #3; NOTE CRACKING AND EFFLORESCENCE

PHOTO #20 - ROCKER BEARINGS AT PIER #4; NOTE TILT

PHOTO #21 - ROCKER BEARINGS AT PIER #4

PHOTO #22 - LOOKING NORTH ALONG UNDERSIDE OF BRIDGE

TOWARD PIER #3

PHOTO #23 - NORTH APPROACH; NOTE SETTLEMENT AND

TRANSVERSE CRACKING OF ASPHALT PAVEMENT

PHOTO #24 - DOWNSTREAM CORNER OF NORTH APPROACH

PHOTO #25 - SETTLEMENT OF NORTH APPROACH PAVEMENT; NOTE

CRACKING AND PATCHWORK

PHOTO #26 - SIGNAL LIGHTS AT SOUTH APPROACH

PHOTO #27 - SOUTH APPROACH PAVEMENT

PHOTO #28 - GABIONS AT SOUTH ENDWALL (APPROACH FILL

STABILIZATION MEASURE)

PHOTO #29 - VIEW FROM BRIDGE LOOKING UPSTREAM

PHOTO #30 - VIEW FROM BRIDGE LOOKING DOWNSTREAM