Bridge_Inspection_Rpt_STR_5140-156P.pdf

TUNNEL INSPECTION REPORT

BIG WITCH TUNNEL

BLUE RIDGE PARKWAY THROUGH BIG WITCH MOUNTAIN

BLUE RIDGE PARKWAY

NP

STRUCTURE NO. 5140-156P

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 6/15/15

Report prepared by: SP

MILE POINT: 461.14

Federal Highway Administration KILOMETER POINT: 742.11 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. 5140-156P

BIG WITCH TUNNEL INSPECTION DATE: 6/15/15

TUNNEL IDENTIFICATION AND DESCRIPTION

LINING MATERIAL: ............... CONCRETE MINIMUM VERTICAL CLR: .... 12.7 FT (3.9 M)

SPRINGLINE LENGTH: ........ 29.5 FT (9.0 M) STRUCT. TOTAL LENGTH: ... 353.0 FT (107.6 M)

CURB TO CURB WIDTH: ..... 29.5 FT (9.0 M) YEAR BUILT:

PROJ./PLAN REF. NO: ......... 2Y7,2Z1 / 00000 YEAR RECONSTRUCTED:

NPS ROAD CLASS: .............. 1 - PRINCIPAL PARK ROAD

STRUCTURE HISTORY: ...... 1958-CONCRETE LININGS ADDED. 2008-REFLECTORS REPLACED.

LOCATION

BLUE RIDGE PARKWAY MILE POINT: ..................... 461.14 (KM PT 742.11)

STATE: .................................. NORTH CAROLINA LOCATION: 5.5 MILES TO U.S. ROUTE 19

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

FEATURE INTERSECTED: ... BIG WITCH MOUNTAIN

STRUCTURE EVALUATION SUMMARY

This concrete lined tunnel is in good condition overall. Problems include, minor leakage and efflorescence occurring at recently repaired drain chases, particularly at 63', 92', 132', and 240' from the north portal; spalling with exposed rebar on the crown at 120' from north portal; and a clogged drain inlet on the west side of the north portal.

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

INSPECTION TEAM: C. CASTRO, R. SILVESTRY

CONDITION ASSESSMENT:

CARLOS CASTRO, P.E., FIELD TEAM LEADER 571-434-1546

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. 5140-156P

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.

D226 PRIORITY OF IMPROVEMENT

ITEM

NO.

MAINTENANCE RECOMMENDATIONS

(GENERALLY NOT FLHP ELIGIBLE)

QTY. UNIT COST

UNIT

ESTIMATE

COST

PRELIM.

59.8, 222.9 RESET REFLECTORS ALONG LINING AS NECESSARY. REMOVE DEBRIS AND

CLEAN INLET AT WEST SIDE OF NORTH PORTAL.

1 LS $2,000 $2,000

PRELIM. MAINTENANCE TOTAL : $2,000

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS) QTY. UNIT UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL :

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL:

PRELIM. REHABILITATION TOTAL:

PRELIM. RECONSTRUCTION TOTAL: ...

TOTAL ITEMIZED COSTS:

$0 $0 $2,000

$2,000

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.)

$2,000

REMARKS:

FIELD INSPECTION REPORT STRUCTURE NO. 5140-156P

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

N

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.

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 CODE EQUIVALENTS FOR SUB-ELEMENTS

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

59. TUNNEL 7

1. LINING G

PORTALS 2. G

CURBS AND SIDEWALKS 3. N

DRAINS AND DRAINAGE 4. F

WEARING SURFACE5. G

RIDEABILITY 6. G

LIGHTING 7. N

OTHER 8. (REFLECTORS/STRIPING) G

9. ADEQUACY OF OPENING SUFF

222. APPROACHES 6

N1. APPROACH SLABS

N2. RELIEF JOINTS

N3. APPROACH GUARDRAIL

F4. SURFACING

G5. EROSION

G6. SETTLEMENT

P7. SIGNS

G8. ALIGNMENT

F9. OTHER (DRAIN INLET)

223. RETAINING WALL 7

G

2. WEEP HOLES

1. WALL

N

N3. FOUNDATION

G4. EROSION AND/OR SCOUR

G5. SETTLEMENT OR DEFLECTION

N6. OTHER

36. TRAFFIC AND SAFETY FEATURES

NA. BRIDGE RAILINGS

NB. TRANSITIONS

NC. APPROACH GUARDRAILS

ND. APPROACH GUARDRAIL ENDS

ITEM REFERENCE AND REMARKS

59.1,4 SPALLING WITH EXPOSED REBAR ON CROWN AT 120' FROM NORTH

PORTAL.

ACTIVE LEAKAGE ON DRAIN CHASES NOTICED AT 63', 92', 132', AND

240' FROM NORTH PORTAL.

VERTICAL CRACKING WITH EFFLORESCENCE AND POPOUTS ON

EAST WALL APPROXIMATELY 155' FROM NORTH PORTAL.

EFFLORESCENCE ON PATCHED AREA ON EAST WALL NEAR SOUTH

PORTAL

59.2 MINOR DETERIORATION OF MORTAR JOINTS WITH

EFFLORESCENCE AND MINOR MOSS GROWTH.

59.8 ROTATED REFLECTORS ON WEST WALL NEAR SOUTH PORTAL.

222.7 11'-10" VERTICAL CLEARANCE SIGN AT SOUTH APPROACH, 13'-7"

VERTICAL CLEARANCE SIGN AT NORTH APPROACH CURRENTLY

INSTALLED.

222.9 DRAIN INLET CLOGGED WITH LEAVES ON WEST SIDE OF NORTH

PORTAL.

223.1 MINOR DETERIORATION OF MORTAR JOINTS IN RETAINING WALL AT

NORTH PORTAL, WEST SIDE WITH MINOR VEGETATION GROWTH

ON WALL.

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 INVENTORY AND APPRAISAL STRUCTURE NO. 5140-156P

STRUCTURE IDENTIFICATION

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

(202) STRUCTURE NAME: .......... BIG WITCH TUNNEL (2) STATE HWY. AGENCY DIST:

(203) STRUCTURE KIND: ............3 - TUNNEL (3) COUNTY CODE: ........................ 087 - HAYWOOD

(204) STRUCTURE NUMBER: ..... 5140-156P (4) CITY/PLACE CODE:

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

(206) ROUTE CODE NUMBER: ... 1 (6) FEATURES INTERSECTED:....... BIG WITCH MOUNTAIN

(207) ROAD SECTION NO: .......... 156P (7) FACILITY CARRIED: .................. BLUE RIDGE PARKWAY

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5140156P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 5.5 MILES TO U.S. ROUTE 1

(210) OPERATING UNIT: ............. BALSAM (10) INV. RTE. - MIN. VERT. CLR: .. 11.67 FT (3.56 M)

(211) PROJECT NO(S): ................ 2Y7,2Z1 (11) MILE POINT: ............................. 461.14 (KM PT 742.11)

(212) DRAWING NUMBERS: ....... 00000 (27) YEAR BUILT:

(21) MAINTAINED BY: ................. 66 - NATIONAL PARK SERVICE (106) YEAR RECONSTRUCTED:

(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

18 - TUNNEL

29.5 FT (9.0 M)

353.0 FT (107.6 M)

6 - N/A

6 - N/A

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: .. 6 - BITUMINOUS

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: ......... R - POSTED (OTHER)

(66) INVENTORY RATING: ...... 0.0 TONS (0.0 METRIC TONS) (70) BRIDGE POSTING: .............. 5 - NO POSTING REQUIRED

(64) OPERATING RATING: ...... 0.0 TONS (0.0 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: 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. 5140-156P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(51) CURB TO CURB WIDTH: ........... 29.5 FT (9.0 M) (16) LATITUDE: ............................. 35°31'04.20"

(17) LONGITUDE: ......................... 83°12'53.40"

(19) DETOUR LENGTH: ............... 20 MI (32 KM)

(28A) LANES ON STRUCT:

(28B) LANES UNDER STRUCT: ... 02

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

(42B) SERVICE UNDER: .............. 1 - HIGHWAY

(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: ....................... 3.7 FT (1.1 M)

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

CONDITION AND APPRAISAL DATA, PROPOSED IMPROVEMENTS, AND COST

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

(59) SUPERSTRUCTURE: .........N

(60) SUBSTRUCTURE: ..............N

(61) CHANNEL: .......................... N

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

(222) APPROACHES:

(223) RETAINING WALL:

(36) TRAFFIC SAFETY FEAT: ... NNNN

(75A) TYPE OF WORK:

(75B) WORK DONE BY:

(76) IMPROVEMENT LENGTH: ..

(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:

0.0 FT (0.0 M)

38.0 FT (11.6 M)

22.0 FT (6.7 M)

8.0 FT (2.4 M)

8.0 FT (2.4 M)

0 - NO MEDIAN

0 °

NO

29.5 FT (9.0 M)

0.0 FT (0.0 M)

0.0 FT (0.0 M)

0 - N/A

0 - N/A

0 - N/A

0.00 FT (0.00 M)

12.67 FT (3.86 M)

12.67 FT (3.86 M)

(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

N

N

N - Not over waterway.

1 - MAINTENANCE

D - MINOR

$2,000

$0

$0

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

1958-CONCRETE LININGS ADDED. 2008-REFLECTORS REPLACED.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

APPENDIX STRUCTURE NO. 5140-156P

PHOTOGRAPHS STRUCTURE NO. 5140-156P

PHOTO #1 - NORTH PORTAL

PHOTO #2 - SOUTH PORTAL

PHOTO #3 - GENERAL UNDERSIDE VIEW LOOKING SOUTH

PHOTO #4 - GENERAL ROADSIDE VIEW LOOKING SOUTH

PHOTO #5 - GENERAL VIEW INSIDE TUNNEL LOOKING NORTH; NOTE

DEBRIS ACCUMULATION ALONG WEST WALL

PHOTO #6 - PARTIALLY CLOGGED DRAIN INLET ON WEST SIDE OF

NORTH PORTAL

PHOTO #7 - EFFLORESCENCE ALONG DRAIN

CHASE ON WEST SIDE AT 40' FROM NORTH

PORTAL; SIMILAR AT EAST

PHOTO #8 - ACTIVE WATER LEAKAGE ALONG

DRAIN CHASE THROUGH CROWN TOWARD

WEST LINING APPROXIMATELY 63' FROM

NORTH PORTAL

PHOTO #9 - ACTIVE WATER LEAKAGE ALONG

DRAIN CHASE ON EAST SIDE APPROXIMATELY

92' FROM NORTH PORTAL

PHOTO #10 - ACTIVE WATER LEAKAGE ALONG

DRAIN CHASE ON WEST SIDE APPROXIMATELY

92' FROM NORTH PORTAL

PHOTO #11 - SPALLING WITH EXPOSED REBAR AT CROWN

APPROXIMATELY 120' FROM NORTH PORTAL

PHOTO #12 - ACTIVE WATER LEAKAGE ON GROUND AT DRAIN CHASE

APPROXIMATELY 132' FROM NORTH PORTAL

PHOTO #13 - ACTIVE WATER LEAKAGE ALONG

DRAIN CHASE ON WEST SIDE APPROXIMATELY

132' FROM NORTH PORTAL

PHOTO #14 - VERTICAL CRACKING WITH

EFFLORESCENCE AND POPOUTS ON EAST

WALL APPROXIMATELY 155' FROM NORTH

PORTAL

PHOTO #15 - DRAIN CHASES WITH ACTIVE WATER LEAKAGE AND

EFFLORESCENCE APPROXIMATELY 240' FROM NORTH PORTAL

PHOTO #16 - PIECE OF WOOD IMBEDDED IN CONCRETE IN WEST WALL

APPROXIMATELY 30' FROM SOUTH END; NOTE DELAMINATION

PHOTO #17 - GOOD CONDITION PATCHED AREA ON THE WEST WALL

NEAR SOUTH PORTAL

PHOTO #18 - ROTATED REFLECTORS ON WEST WALL NEAR SOUTH

PORTAL

PHOTO #19 - MINOR EFFLORESCENCE ALONG CROWN NEAR SOUTH

PORTAL

PHOTO #20 - EFFLORESCENCE ON PATCHED AREA ON EAST WALL

NEAR SOUTH PORTAL

PHOTO #21 - TYPICAL EFFLORESCENCE

ALONG RINGSTONES AT PORTALS, WEST SIDE

OF SOUTH PORTAL SHOWN

PHOTO #22 - TYPICAL MOSS GROWTH ON

PORTALS, EAST SIDE OF SOUTH PORTAL