Bridge_Inspection_Rpt_STR_5140-139P.pdf

TUNNEL INSPECTION REPORT

CRAGGY PINNACLE TUNNEL

BLUE RIDGE PARKWAY THROUGH CRAGGY PINNACLE MOUNTAIN

BLUE RIDGE PARKWAY

NP

STRUCTURE NO. 5140-139P

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 6/9/15

Report prepared by: SP

MILE POINT: 364.39

Federal Highway Administration KILOMETER POINT: 586.41 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. 5140-139P

CRAGGY PINNACLE TUNNEL INSPECTION DATE: 6/9/15

TUNNEL IDENTIFICATION AND DESCRIPTION

LINING MATERIAL: ............... UNLINED / CONCRETE MINIMUM VERTICAL CLR: .... 13.5 FT (4.1 M)

SPRINGLINE LENGTH: ........ 29.7 FT (9.1 M) STRUCT. TOTAL LENGTH: ... 246.0 FT (75.0 M)

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

PROJ./PLAN REF. NO: ......... 2PI,2P6,2L10 / YEAR RECONSTRUCTED:

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

STRUCTURE HISTORY: ...... 1956-NORTH/SOUTH LININGS AND PORTALS; 1992-MAJOR RECONSTRUCTION:

SUPERSTRUCTURE, ROCKBOLTS, AND SCREENING; 2008-DRAIN CHASE REPAIR.

LOCATION

BLUE RIDGE PARKWAY MILE POINT: ..................... 364.39 (KM PT 586.41)

STATE: .................................. NORTH CAROLINA LOCATION: 9.2 MILES TO NC ROUTE 128

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

FEATURE INTERSECTED: ... CRAGGY PINNACLE MOUNTAIN

STRUCTURE EVALUATION SUMMARY

This tunnel is in fair condition at this time. The most serious problem is the widespread leakage throughout the tunnel. During this inspection, minor to moderate leakage was found at both sides of the north portal, at the west side of the south portal, and through the tunnel lining cracks. The unlined portion of the tunnel was also found wet. The leakage from the tunnel plus running water into the tunnel from a ditch at the west side of the north approach cause the roadway through the tunnel to become wet and slippery, and might create icing and hazardous driving conditions during winter time. Signs at both approaches warn motorists of ice in the tunnel.

Other problems include a drop-off along the west curbline at the north approach, a barrel at the west side near the south portal, and some broken/missing reflectors along both sides of the tunnel. In addition, the clearance signs at both approaches show a vertical clearance higher than the actual one.

Corrective action should be taken 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. 5140-139P

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.

59.8 REPLACE MISSING REFLECTORS ALONG BOTH SIDE OF TUNNEL AS NECESSARY.

REMOVE BARREL FROM WEST SIDE.

1 LS $2,000 $2,000

222.7 POST CORRECT VERTICAL CLEARANCE ON SIGNS AT BOTH APPROACHES. 2 EA $250 $500

PRELIM. MAINTENANCE TOTAL : $2,500

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS) QTY. UNIT UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

59.1 SEAL CRACKS IN LINING. 150 LF $100 $15,000 $0

59.4 INSTALL ROADWAY DRAINAGE SYSTEM ALONG TUNNEL. 500 LF $50 $25,000 $0

59 CONTRACT COSTS FOR MOBILIZATION, TRAFFIC CONTROL, AND

DESIGN/CONSTRUCTION ENGINEERING.

1 LS $20,000 $20,000 $0

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL : $60,000 $0

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL:

PRELIM. REHABILITATION TOTAL:

PRELIM. RECONSTRUCTION TOTAL: ...

TOTAL ITEMIZED COSTS:

$0 $60,000 $2,500

$62,500

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.)

$62,500

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

FIELD INSPECTION REPORT STRUCTURE NO. 5140-139P

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 6

F

2. PORTALS

1. LINING

G

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 7

N1. APPROACH SLABS

N2. RELIEF JOINTS

G3. APPROACH GUARDRAIL

G4. SURFACING

G5. EROSION

G6. SETTLEMENT

P7. SIGNS

F8. 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

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.

ITEM REFERENCE AND REMARKS

59.1,4 APPROXIMATELY 28' OF CONCRETE LINING AT EACH END OF

TUNNEL WITH REMAINING PORTION BEING UNLINED.

MINOR TO MODERATE CRACKING WITH EFFLORESCENCE AND

LEAKAGE FROM NORTH AND SOUTH CONCRETE LINING; SEE ALSO

59.4. DRAIN HOLE THROUGH LINING NEAR SOUTH PORTAL FILLED

WITH DEBRIS.

METAL SCREENING AND ROCKBOLTING IN UNLINED PORTION OF

TUNNEL WITH MINOR RUSTING OF EXPOSED PORTIONS OF

ROCKBOLTS. MODERATE LEAKAGE IN UNLINED SECTION, WHICH

CAN CAUSE LARGE ICE PATCHES TO FORM ACROSS ENTIRE

ROADWAY WHEN TEMPERATURE FALLS BELOW FREEZING. MINOR

CRACKING WITH EFFLORESCENCE ON SHOTCRETE TRANSITION.

59.2 ACTIVE MODERATE LEAKAGE ALONG BOTH SIDES OF NORTH

PORTAL AND WEST SIDE OF SOUTH PORTAL; SEE ALSO 59.4. MINOR

DETERIORATION OF MASONRY MORTAR JOINTS AT BASE OF NORTH

PORTAL. MINOR EFFLORESCENCE ON NORTH PORTAL RING

STONES. BARREL AT WEST SIDE OF SOUTH PORTAL.

59.4 GRAVEL ALONG WEST SHOULDER. WATER LEAKING AND RUNNING

ONTO ROADWAY FROM LEAKAGE AT BOTH PORTALS AND THROUGH

CRACKING OF TUNNEL LINING, AND FROM DITCH AT WEST SIDE OF

NORTH APPROACH.

59.8 ONE REFLECTOR IS MISSING ON WEST SIDE OF TUNNEL, AT NORTH

END, AND ONE PULLED OUT OF GROUND LEANING AGAINST WEST

WALL. TWO REFLECTORS MISSING AND TWO PULLED OUT OF

GROUND ON EAST SIDE.

222.3 MINOR CHECKING OF TIMBER RAILS AT SOUTH APPROACH, EAST

SIDE.

222.7 "14'-3" MINIMUM CLEARANCE" SIGNS POSTED AT APPROACHES;

ACTUAL MINIMUM CLEARANCE IS 12'-10". "CRAGGY PINNACLE

TUNNEL" SIGN POSTED AT BOTH APPROACHES. "WATCH FOR ICE IN

TUNNEL" SIGN AT NORTH APPROACH; "ICE ON PAVEMENT" SIGN AT

SOUTH APPROACH.

FIELD INSPECTION REPORT STRUCTURE NO. 5140-139P

ADDITIONAL ITEM REFERENCE AND REMARKS

222.8 MODERATELY SHARP CURVES AT BOTH APPROACHES.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5140-139P

STRUCTURE IDENTIFICATION

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

(202) STRUCTURE NAME: .......... CRAGGY PINNACLE TUNNEL (2) STATE HWY. AGENCY DIST:

(203) STRUCTURE KIND: ............3 - TUNNEL (3) COUNTY CODE: ........................ 021 - BUNCOMBE

(204) STRUCTURE NUMBER: ..... 5140-139P (4) CITY/PLACE CODE:

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

(206) ROUTE CODE NUMBER: ... 1 (6) FEATURES INTERSECTED:....... CRAGGY PINNACLE MOUNTA

(207) ROAD SECTION NO: .......... 139P (7) FACILITY CARRIED: .................. BLUE RIDGE PARKWAY

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5140139P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 9.2 MILES TO NC ROUTE 128

(210) OPERATING UNIT: ............. GILLESPE (10) INV. RTE. - MIN. VERT. CLR: .. 14.30 FT (4.36 M)

(211) PROJECT NO(S): ................ 2PI,2P6,2L10 (11) MILE POINT: ............................. 364.39 (KM PT 586.41)

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

0 - OTHER

18 - TUNNEL

29.7 FT (9.1 M)

246.0 FT (75.0 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?: ..................... NO

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. 5140-139P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(51) CURB TO CURB WIDTH: ........... 29.7 FT (9.1 M) (16) LATITUDE: ............................. 35°42'04.30"

(17) LONGITUDE: ......................... 82°22'34.80"

(19) DETOUR LENGTH: ............... 40 MI (64 KM)

(28A) LANES ON STRUCT:

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

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

(42B) SERVICE UNDER: .............. 0 - OTHER

(29) AVG. DAILY TRAFFIC:

(30) YEAR OF ADT:

(114) FUTURE ADT:

(115) YEAR OF FUTURE ADT:

(101) PARALLEL STRUCTURE: ... N - NONE

(38) NAVIGATION CONTROL?: ... N

(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)

(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

29.7 FT (9.1 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)

13.50 FT (4.11 M)

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

(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 - Not over waterway.

2 - REHAB/RECONSTRUCTION

C - MODERATE

$2,500

$60,000

$0

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

1956-NORTH/SOUTH LININGS AND PORTALS; 1992-MAJOR RECONSTRUCTION: SUPERSTRUCTURE, ROCKBOLTS, AND SCREENING;

2008-DRAIN CHASE REPAIR.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

APPENDIX STRUCTURE NO. 5140-139P

PHOTOGRAPHS STRUCTURE NO. 5140-139P

PHOTO #1 - NORTH PORTAL

PHOTO #2 - SOUTH PORTAL

PHOTO #3 - GENERAL UNDERSIDE VIEW OF

SOUTH CONCRETE LINING

PHOTO #4 - SCALING AT NORTH END OF

SOUTH CONCRETE LINING, EAST SIDE

PHOTO #5 - CRACKING WITH

EFFLORESCENCE OF CONCRETE LINING ON

EAST SIDE NEAR SOUTH PORTAL

PHOTO #6 - CRACKING WITH

EFFLORESCENCE ON CONCRETE LINING AT

WEST SIDE NEAR SOUTH PORTAL; NOTE WET

PAVEMENT

PHOTO #7 - ACTIVE WATER LEAKAGE AND

CRACKING WITH EFFLORESCENCE ON WEST

CONCRETE LINING NEAR NORTH PORTAL

PHOTO #8 - CRACKING WITH

EFFLORESCENCE ON EAST SIDE OF

CONCRETE LINING AT NORTH PORTAL

PHOTO #9 - GENERAL VIEW OF ROADWAY LOOKING NORTH

PHOTO #10 - CRACKING WITH EFFLORESCENCE ON UNLINED SECTION

NEAR NORTH CONCRETE LINING

PHOTO #11 - CRACKING WITH

EFFLORESCENCE ON NORTH TRANSITION

LINING BETWEEN LINED AND UNLINED

SECTIONS; NOTE ACTIVE WATER LEAKAGE

PHOTO #12 - MISSING REFLECTOR ON EAST

SIDE NEAR SOUTH PORTAL

PHOTO #13 - TYPICAL DETERIORATION OF

MORTAR JOINT ALONG BASE OF NORTH

PORTAL RING STONES; WEST SIDE SHOWN

PHOTO #14 - WATER PONDING AT

NORTHWEST CORNER

PHOTO #15 - LEAKAGE ALONG WEST SIDE OF

SOUTH PORTAL; NOTE VEGETATION GROWTH

PHOTO #16 - TYPICAL SIGNAGE AT

APPROACHES, SIGNS AT SOUTH APPROACH

SHOWN