Tunnel Inspection Report.pdf

TUNNEL INSPECTION REPORT

BUCK SPRING TUNNEL

BLUE RIDGE PARKWAY THROUGH BUCK SPRING MOUNTAIN

BLUE RIDGE PARKWAY

NP

STRUCTURE NO. 5140-150P

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 6/23/07

Report prepared by: SP

MILE POINT: 407.25

Federal Highway Administration KILOMETER POINT: 655.39 Federal Lands Bridge Office Bridge Inspection and Management Program 21400 Ridgetop Circle Sterling, Virginia 20166 http://www.efl.fhwa.dot.gov/FLHBO/BIP

STRUCTURE SUMMARY STRUCTURE NO. 5140-150P

BUCK SPRING TUNNEL INSPECTION DATE: 6/23/07

TUNNEL IDENTIFICATION AND DESCRIPTION

LINING MATERIAL: ............... CONCRETE / NOT APPLICABLE MINIMUM VERTICAL CLR: .... 13.5 FT (4.1 M)

SPRINGLINE LENGTH: ........ 0.0 FT (0.0 M) STRUCT. TOTAL LENGTH: ... 468.0 FT (142.6 M)

CURB TO CURB WIDTH: ..... 29.7 FT (9.1 M) YEAR BUILT:

PROJ./PLAN REF. NO: ......... 2T5,2T2,2T10 / 00000 YEAR RECONSTRUCTED:

NPS ROAD CLASS: .............. PRINCIPAL PARK ROAD

STRUCTURE HISTORY: ...... 1985-LINING REHABILITATION.

LOCATION

BLUE RIDGE PARKWAY MILE POINT: ..................... 407.25 (KM PT 655.39)

STATE: .................................. NORTH CAROLINA LOCATION: 4.6 MILES TO U.S. ROUTE 276

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

FEATURE INTERSECTED: ... BUCK SPRING MOUNTAIN

STRUCTURE EVALUATION SUMMARY

This tunnel is in fair condition overall. The most serious problem at this time is water leakage from a moderate spall over the roadway at the south end of the tunnel, causing an ice patch to form on the roadway when temperatures fall below freezing, creating hazardous driving conditions. Other problems include moderate cracking with efflorescence and water leakage at several drain chases, minor deterioration of the portal masonry mortar joints and 5 missing and 10 damaged reflectors along the tunnel lining. Rehabilitation should remain a moderately high priority. There have been no significant changes in the structural condition since the last inspection.

With rehabilitation as outlined in this report, as well as regular maintenance, a useful life of 25-30 years can be expected for this tunnel under current operating conditions.

INSPECTION TEAM: R. PARKER, P. SWANN (VOLKERT & ASSOCIATES, INC.)

CONDITION ASSESSMENT:

RICHARD W. PARKER, P.E., FIELD TEAM LEADER

REPORT REVIEW:

MARCUS MILLER, P.E., LEAD STRUCTURAL ENGINEER 703-404-6252

REPORT APPROVAL: DATE: 10/29/07

JOHN R. THIEL, P.E., BRIDGE MANAGEMENT ENGINEER 703-404-6251

RECOMMENDATIONS AND ESTIMATED COSTS STRUCTURE NO. 5140-150P

226 PRIORITY OF IMPROVEMENT C

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.

ITEM

NO.

MAINTENANCE RECOMMENDATIONS

(GENERALLY NOT FLHP ELIGIBLE)

QTY. UNIT

COST

UNIT

ESTIMATE

COST

PRELIM.

59.1 REPAIR SPALLS ON TUNNEL LINING. 1 LS $4,000 $4,000

59.8 REPLACE MISSING AND DAMAGED REFLECTORS. 15 EA $250 $4,000

PRELIM. MAINTENANCE TOTAL : $8,000

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS)

QTY. UNIT UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

59.4 REPAIR FAILED DRAIN CHASES AND REPAIR LEAKING CHASES. 58 LF $500 $30,000 $0

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL : $30,000 $0

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL:

PRELIM. REHABILITATION TOTAL:

PRELIM. RECONSTRUCTION TOTAL:

TOTAL ITEMIZED COSTS: ..................... $38,000

$0 $30,000

$8,000 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.)

$76,000

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

FIELD INSPECTION REPORT STRUCTURE NO. 5140-150P

INSPECTION DATE: 6/23/07

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 5

F1. LINING

G2. PORTALS

N3. CURBS AND SIDEWALKS

F4. DRAINS AND DRAINAGE

G5. WEARING SURFACE

G6. RIDEABILITY

N7. LIGHTING

F8. OTHER (Reflectors)

9. ADEQUACY OF OPENING SUFF

222. APPROACHES 8

N1. APPROACH SLABS

N2. RELIEF JOINTS

N3. APPROACH GUARDRAIL

G4. SURFACING

G5. EROSION

G6. SETTLEMENT

G7. SIGNS

G8. ALIGNMENT

N9. OTHER

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

NA. BRIDGE RAILINGS

NB. TRANSITIONS

NC. APPROACH GUARDRAILS

ND. APPROACH GUARDRAIL ENDS

ITEM REFERENCE AND REMARKS

59.1 MODERATE SPALL WITH WATER LEAKAGE OVER ROADWAY, 150'

FROM SOUTH END OF TUNNEL WHICH IS CAUSING AN ICE PATCH

ON ROADWAY WHEN TEMPERATURE FALLS BELOW FREEZING.

MODERATE CRACKING THROUGHOUT LINING WITH

EFFLORESCENCE AND MINOR WATER LEAKAGE. MINOR SPALL

WITH EXPOSED REBAR ON UNDERSIDE OF CROWN

APPROXIMATELY MIDWAY THROUGH. VOID IN CROWN WITH

EXPOSED REBAR 120' FROM NORTH PORTAL. ROCK/SOIL EXPOSED

ABOVE TUNNEL LINING. SEVERE SPALL WITH EXPOSED REBAR

AND ROCK 150' FROM SOUTH PORTAL, EAST LINING. 18" DIA. HOLE

WITH EXPOSED REBAR AND ROCK 100' IN FROM SOUTH PORTAL,

EAST LINING.

59.2 MINOR DETERIORATION OF PORTAL MASONRY MORTAR. MINOR

EFFLORESCENCE ON MASONRY OF BOTH PORTALS. MINOR

VEGETATION GROWTH ON WEST SIDE OF NORTH PORTAL.

59.4 MODERATE CRACKING WITH EFFLORESCENCE AND MINOR WATER

LEAKAGE AT DRAIN CHASES. PARTIAL FAILURE OF SOME

PREVIOUS REPAIRS AT DRAIN CHASES. DRAIN CHASE BLOWN OUT

120' FROM SOUTH PORTAL, 4' X 8" AREA ON EAST LINING. FAILED

REPAIR AREA ON WEST SIDE LINING, APPROXIMATELY 30' FROM

NORTH PORTAL.

59.8 5 MISSING AND 10 DAMAGED REFLECTIVE DEVICES THROUGHOUT

TUNNEL.

222.7 13'-2" VERTICAL CLEARANCE SIGNS AT NORTH AND SOUTH

APPROACHES.

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. 5140-150P

STRUCTURE IDENTIFICATION

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

(202) STRUCTURE NAME: .......... BUCK SPRING TUNNEL (2) STATE HWY. AGENCY DIST:

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

(204) STRUCTURE NUMBER: ..... 5140-150P (4) CITY/PLACE CODE:

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

(206) ROUTE CODE NUMBER: ... 1 (6) FEATURES INTERSECTED:....... BUCK SPRING MOUNTAIN

(207) ROAD SECTION NO: .......... 150P (7) FACILITY CARRIED: .................. BLUE RIDGE PARKWAY

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5140150P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 4.6 MILES TO U.S. ROUTE 2

(210) OPERATING UNIT: ............. BALSAM (10) INV. RTE. - MIN. VERT. CLR: .. 13.33 FT (4.06 M)

(211) PROJECT NO(S): ................ 2T5,2T2,2T10 (11) MILE POINT: ............................. 407.25 (KM PT 655.39)

(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:

1 - CONCRETE

18 - TUNNEL

29.7 FT (9.1 M)

468.0 FT (142.6 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 - OTHER OR 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: 6/07 (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. 5140-150P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(16) LATITUDE: ............................. 35°25'04.00" (51) CURB TO CURB WIDTH: ........... 29.7 FT (9.1 M)

(17) LONGITUDE: ......................... 82°44'48.00" (52) DECK WIDTH: ............................ 0.0 FT (0.0 M)

(19) DETOUR LENGTH: ............... 50 MI (80 KM) (32) APPR. ROADWAY WIDTH: ........ 38.0 FT (11.6 M)

(28A) LANES ON STRUCT: .......... 00 (213) APPR. PAVEMENT WIDTH: ..... 22.0 FT (6.7 M)

(28B) LANES UNDER STRUCT: ... 02 LEFT SHOULDER: .................. 8.0 FT (2.4 M)

(42A) SERVICE ON: ..................... 1 - HIGHWAY RIGHT SHOULDER: ................ 8.0 FT (2.4 M)

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

(29) AVG. DAILY TRAFFIC: .......... 5007 (34) SKEW ANGLE: ............................ 0 °

(30) YEAR OF ADT: ...................... 2003 (35) DECK FLARE?: ........................... NO

(114) FUTURE ADT: ..................... 5507 (47) TOTAL HORIZ. CLEARANCE: .... 22.5 FT (6.9 M)

(115) YEAR OF FUTURE ADT: ..... 2023 (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: ......... 0 - N/A

(111) ABUT. OR PIER PROT: ....... MATERIAL: .............................. 0 - N/A

DESIGN TYPE: ........................ 0 - N/A

LATERAL UNDERCLEARANCE:

(55) RIGHT: ....................... 3.0 FT (0.9 M) (215) BRIDGE RAIL HEIGHT: ............ 0.00 FT (0.00 M)

(56) LEFT: ......................... 0.0 FT (0.0 M) (53) MIN. VRT. CLEAR. OVER DECK: 13.50 FT (4.11 M)

(54) MIN. VRT. UNDERCLEARANCE: 13.50 FT (4.11 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: ........... N

(224) EST. REMAINING LIFE: .... 20 YEARS

(36) TRAFFIC SAFETY FEAT: ... NNNN

(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

N

N

N - N

2 - REHAB/RECONSTRUCTION

C - MODERATE

$8,000

$30,000

$0

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

1985-LINING REHABILITATION.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

APPENDIX STRUCTURE NO. 5140-150P

PHOTOGRAPHS STRUCTURE NO. 5140-150P

PHOTO #1 - NORTH PORTAL

PHOTO #2 - SOUTH PORTAL

PHOTO #3 - GENERAL ROADWAY VIEW LOOKING SOUTH

PHOTO #4 - GENERAL UNDERSIDE VIEW LOOKING SOUTH

PHOTO #5 - CRACKING WITH

EFFLORESCENCE ON EAST TUNNEL LINING

NEAR NORTH PORTAL

PHOTO #6 - GENERAL VIEW OF 2ND DRAIN

CHASE ON WEST SIDE OF TUNNEL LINING,

APPROXIMATELY 25' FROM NORTH PORTAL

PHOTO #7 - CRACKING AND SPALLING ALONG

WEST SIDE DRAIN CHASE, APPROXIMATELY

25' FROM NORTH PORTAL

PHOTO #8 - SPALLING WITH EXPOSED REBAR

ALONG WEST TUNNEL LINING,

APPROXIMATELY 120' FROM NORTH PORTAL

PHOTO #9 - MISSING REFLECTIVE DEVICE ON WEST TUNNEL LINING,

APPROXIMATELY HALF WAY THROUGH TUNNEL

PHOTO #10 - SPALL WITH EXPOSED REBAR ON CROWN OF TUNNEL

LINING, APPROXIMATELY HALF WAY THROUGH TUNNEL

PHOTO #11 - SPALL WITH EXPOSED REBAR IN

CROWN OF TUNNEL LINING, APPROXIMATELY

HALF WAY THROUGH TUNNEL

PHOTO #12 - CRACKING AND LEAKAGE ON

EAST SIDE DRAIN CHASE, APPROXIMATELY

175' FROM SOUTH PORTAL

PHOTO #13 - GENERAL VIEW OF SPALLING ON

EAST TUNNEL LINING, APPROXIMATELY 150'

FROM SOUTH PORTAL

PHOTO #14 - CRACKING AND LEAKAGE ON

DRAIN CHASE ON EAST SIDE,

APPROXIMATELY 150' FROM SOUTH PORTAL

PHOTO #15 - HOLE IN LINING WITH EXPOSED REBAR, APPROXIMATELY

150' FROM SOUTH PORTAL

PHOTO #16 - PATCHING ALONG WEST TUNNEL LINING,

APPROXIMATELY 140' FROM SOUTH PORTAL

PHOTO #17 - SPALL WITH LEAKAGE ON EAST

TUNNEL LINING, APPROXIMATELY 140' FROM

SOUTH PORTAL

PHOTO #18 - EXPOSED DRAIN CHASE ON

EAST TUNNEL LINING, APPROXIMATELY 120'

FROM SOUTH PORTAL

PHOTO #19 - DETERIORATED AND EXPOSED

DRAIN CHASE ON EAST TUNNEL LINING,

APPROXIMATELY 100' FROM SOUTH PORTAL

PHOTO #20 - MISSING REFLECTOR ALONG

WEST SIDE OF TUNNEL, APPROXIMATELY 100'

FROM SOUTH PORTAL

PHOTO #21 - GENERAL VIEW OF DETERIORATED AND EXPOSED DRAIN

CHASE ON EAST TUNNEL LINING, APPROXIMATELY 100' FROM SOUTH

PORTAL

PHOTO #22 - PATCHING ALONG EAST TUNNEL LINING,

APPROXIMATELY 15' FROM SOUTH PORTAL