Bridge_Inspection_Rpt_STR_5140-148P.pdf

TUNNEL INSPECTION REPORT

FORK MOUNTAIN TUNNEL

BLUE RIDGE PARKWAY THROUGH FORK MOUNTAIN

BLUE RIDGE PARKWAY

NP

STRUCTURE NO. 5140-148P

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 6/13/15

Report prepared by: SP

MILE POINT: 404.01

Federal Highway Administration KILOMETER POINT: 650.17 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. 5140-148P

FORK MOUNTAIN TUNNEL INSPECTION DATE: 6/13/15

TUNNEL IDENTIFICATION AND DESCRIPTION

LINING MATERIAL: ............... CONCRETE MINIMUM VERTICAL CLR: .... 13.8 FT (4.2 M)

SPRINGLINE LENGTH: ........ 28.8 FT (8.8 M) STRUCT. TOTAL LENGTH: ... 392.0 FT (119.5 M)

CURB TO CURB WIDTH: ..... 28.8 FT (8.8 M) YEAR BUILT:

PROJ./PLAN REF. NO: ......... 2T5,2T1,2T10 / 00000 YEAR RECONSTRUCTED:

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

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

LOCATION

BLUE RIDGE PARKWAY MILE POINT: ..................... 404.01 (KM PT 650.17)

STATE: .................................. NORTH CAROLINA LOCATION: 8.0 MILES TO U.S. ROUTE 276

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

FEATURE INTERSECTED: ... FORK MOUNTAIN

STRUCTURE EVALUATION SUMMARY

This concrete lined tunnel is in fair condition overall. The main problem is the moderate deterioration with significant leakage of several drains. These drain chases are located approximately 45', 55', 285', 300', 315', and 343' from the north portal. The drain chases approximately 45', 285', and 343' from the north portal have deteriorated to the point where the drain chase is exposed.

Other problems include several missing and damaged reflectors along both sides of the tunnel lining and debris in the drainage inlet on the east side of the south approach.

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. 5140-148P

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 AND DAMAGED REFLECTORS ALONG BOTH SIDES OF TUNNEL

LINING.

1 LS $2,000 $2,000

59.4 REMOVE DEBRIS FROM INLET ON EAST SIDE OF SOUTH APPROACH. 1 LS $1,000 $1,000

222.7 POST CORRECT VERTICAL CLEARANCE SIGNS AT BOTH APPROACHES 2 EA $300 $1,000

PRELIM. MAINTENANCE TOTAL : $4,000

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS) QTY. UNIT UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

59.4 REPLACE EXPOSED AND LEAKING DRAIN CHASES. 270 LF $750 $203,000 $0

59 CONTRACT COSTS FOR MOBILIZATION, TRAFFIC CONTROL, AND

DESIGN/CONSTRUCTION ENGINEERING.

1 LS $143,000 $143,000 $0

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL : $346,000 $0

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL:

PRELIM. REHABILITATION TOTAL:

PRELIM. RECONSTRUCTION TOTAL: ...

TOTAL ITEMIZED COSTS:

$0 $346,000 $4,000

$350,000

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.)

$350,000

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

FIELD INSPECTION REPORT STRUCTURE NO. 5140-148P

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

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

N3. APPROACH GUARDRAIL

G4. SURFACING

G5. EROSION

G6. SETTLEMENT

G7. SIGNS

F8. ALIGNMENT

G9. OTHER (STRIPING)

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 MINOR SPALLING WITH EFFLORESCENCE ON CROWN

APPROXIMATELY 100' FROM NORTH PORTAL. MINOR CRACKING

WITH EFFLORESCENCE ALONG LINING.

MODERATE DETERIORATION WITH SIGNIFICANT LEAKAGE ON

LINING AT DRAIN CHASES APPROXIMATELY 45', 55', 285', 300', 315',

AND 343' FROM NORTH PORTAL; DRAIN CHASES EXPOSED

APPROXIMATELY 45', 285', AND 343' FROM NORTH PORTAL.

MINOR COLLISION SCRAPES ON LINING THROUGH CURVE.

59.2 MINOR CRACKING OF PORTAL MASONRY MORTAR JOINTS;

MODERATE EFFLORESCENCE FROM JOINTS ON RING STONES.

MINOR VINE GROWTH ON NORTH PORTAL.

59.4 INLET ON EAST SIDE OF SOUTH APPROACH CLOGGED BY DEBRIS.

59.5 MINOR DETERIORATION OF ROADWAY APPROXIMATELY 315' FROM

NORTH PORTAL.

59.8 MISSING AND DAMAGED REFLECTORS ON BOTH SIDES OF TUNNEL

LINING: 3 ALONG WEST, 5 ALONG EAST. MOST ROADWAY

REFLECTORS AND ARE MISSING.

222.7 13'-6" VERTICAL CLEARANCE, "TURN LIGHTS ON", AND "FORK

MOUNTAIN TUNNEL" SIGNS AT BOTH APPROACHES. ACTUAL

VERTICAL CLEARANCE IS 13'-0". "SUDDEN CURVES AHEAD" SIGN AT

SOUTH APPROACH.

222.8 SHARP CURVES AT SOUTH APPROACH.

222.9 MINOR DETERIORATION OF EDGE OF ROADWAY STRIPING AT

SOUTH APPROACH.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5140-148P

STRUCTURE IDENTIFICATION

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

(202) STRUCTURE NAME: .......... FORK MOUNTAIN TUNNEL (2) STATE HWY. AGENCY DIST:

(203) STRUCTURE KIND: ............3 - TUNNEL (3) COUNTY CODE: ........................ 089 - HENDERSON

(204) STRUCTURE NUMBER: ..... 5140-148P (4) CITY/PLACE CODE:

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

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

(207) ROAD SECTION NO: .......... 148P (7) FACILITY CARRIED: .................. BLUE RIDGE PARKWAY

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5140148P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 8.0 MILES TO U.S. ROUTE 2

(210) OPERATING UNIT: ............. GILLESPE (10) INV. RTE. - MIN. VERT. CLR: .. 13.80 FT (4.21 M)

(211) PROJECT NO(S): ................ 2T5,2T1,2T10 (11) MILE POINT: ............................. 404.01 (KM PT 650.17)

(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

28.8 FT (8.8 M)

392.0 FT (119.5 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: .. 9 - OTHER

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. 5140-148P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(51) CURB TO CURB WIDTH: ........... 28.8 FT (8.8 M) (16) LATITUDE: ............................. 35°27'00.50"

(17) LONGITUDE: ......................... 82°42'52.70"

(19) DETOUR LENGTH: ............... 50 MI (80 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: ....................... 0.0 FT (0.0 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: ........... N

(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

13 °

NO

28.8 FT (8.8 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)

13.83 FT (4.22 M)

13.83 FT (4.22 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.

2 - REHAB/RECONSTRUCTION

C - MODERATE

$4,000

$346,000

$0

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

1985-LINING REHABILITATION.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

APPENDIX STRUCTURE NO. 5140-148P

PHOTOGRAPHS STRUCTURE NO. 5140-148P

PHOTO #1 - NORTH PORTAL

PHOTO #2 - SOUTH PORTAL

PHOTO #3 - GENERAL UNDERSIDE VIEW LOOKING SOUTH

PHOTO #4 - GENERAL ROADWAY VIEW LOOKING SOUTH

PHOTO #5 - WEARING OF PAVEMENT ~315'

FROM NORTH PORTAL; PHOTO OF

NORTHBOUND LANE LOOKING SOUTH

PHOTO #6 - EFFLORESCENCE ON

RINGSTONES AT EAST SIDE OF NORTH

PORTAL

PHOTO #7 - SCALING UNDER DRAINAGE PIPE

45' FROM NORTH PORTAL

PHOTO #8 - CRACKING AND SPALLS AND

ACTIVE WATER LEAKAGE ON EAST DRAIN

CHASE NEAR CROWN APPROXIMATELY 55'

FROM NORTH PORTAL; NOTE SCALING

PHOTO #9 - CRACKING WITH

EFFLORESCENCE ON EAST LINING 89' FROM

NORTH PORTAL

PHOTO #10 - MISSING REFLECTORS ALONG

WEST LINING APPROXIMATELY 100' FROM

NORTH PORTAL GOING SOUTH

PHOTO #11 - SPALL WITH EFFLORESCENCE IN

CROWN APPROXIMATELY 100' FROM NORTH

PORTAL

PHOTO #12 - SPALL WITH ACTIVE WATER

LEAKAGE ON WEST LINING APPROXIMATELY

180' FROM NORTH PORTAL