Bridge_Inspection_Rpt_STR_5140-157P.pdf

TUNNEL INSPECTION REPORT

RATTLESNAKE MOUNTAIN TUNNEL

BLUE RIDGE PARKWAY THROUGH RATTLESNAKE MOUNTAIN

BLUE RIDGE PARKWAY

NP

STRUCTURE NO. 5140-157P

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 6/15/15

Report prepared by: SP

MILE POINT: 465.69

Federal Highway Administration KILOMETER POINT: 749.44 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. 5140-157P

RATTLESNAKE MOUNTAIN TUNNEL INSPECTION DATE: 6/15/15

TUNNEL IDENTIFICATION AND DESCRIPTION

LINING MATERIAL: ............... CONCRETE MINIMUM VERTICAL CLR: .... 14.1 FT (4.3 M)

SPRINGLINE LENGTH: ........ 29.3 FT (8.9 M) STRUCT. TOTAL LENGTH: ... 415.0 FT (126.5 M)

CURB TO CURB WIDTH: ..... 29.3 FT (8.9 M) YEAR BUILT:

PROJ./PLAN REF. NO: ......... 2Z8,2Z5 / 00000 YEAR RECONSTRUCTED: ....N/A

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

STRUCTURE HISTORY: ...... 2008-REFLECTORS REPLACED.

LOCATION

BLUE RIDGE PARKWAY MILE POINT: ..................... 465.69 (KM PT 749.44)

STATE: .................................. NORTH CAROLINA LOCATION: 3.5 MILES TO U.S. ROUTE 441

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

FEATURE INTERSECTED: ... RATTLESNAKE MOUNTAIN

STRUCTURE EVALUATION SUMMARY

This concrete lined tunnel is in fair condition overall with only minor problems at this time. The most serious problem is the loose and delaminated concrete in the crown approximately 260' from the north portal. This loose concrete poses a threat to the motorists on the underpass roadway. The inspection also revealed several areas of cracking with leakage through the tunnel lining; and some spalling with exposed rebar at few locations. Finally, the clearance signs at both approaches do not reflect the actual vertical clearance.

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. 5140-157P

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.

222.7 INSTALL CORRECT MINIMUM VERTICAL CLEARANCE SIGNS AT BOTH

APPROACHES.

2 EA $500 $1,000

59.8 REPLACE MISSING AND DAMAGED REFLECTORS. 3 EA $250 $1,000

PRELIM. MAINTENANCE TOTAL : $2,000

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS) QTY. UNIT UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

59.1 REMOVE LOOSE CONCRETE FROM CROWN APPROXIMATELY 260'

FROM NORTH PORTAL. CLEAN AND SEAL AREAS OF EXPOSED

REBAR WITH APPROVED PROTECTIVE COATING.

1 LS $10,000 $10,000 $0

59 CONTRACT COSTS FOR MOBILIZATION, TRAFFIC CONTROL, AND

DESIGN/CONSTRUCTION ENGINEERING.

1 LS $7,000 $7,000 $0

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL : $17,000 $0

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL:

PRELIM. REHABILITATION TOTAL:

PRELIM. RECONSTRUCTION TOTAL: ...

TOTAL ITEMIZED COSTS:

$0 $17,000 $2,000

$19,000

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.)

$19,000

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

FIELD INSPECTION REPORT STRUCTURE NO. 5140-157P

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

1. LINING F

PORTALS 2. G

CURBS AND SIDEWALKS 3. N

DRAINS AND DRAINAGE 4. G

WEARING SURFACE5. G

RIDEABILITY 6. G

LIGHTING 7. N

OTHER 8. (REFLECTORS/STRIPING) G

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

G8. ALIGNMENT

F9. 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 (ALL MEASURES ARE APPROXIMATE FROM NORTH PORTAL).

MINOR SPALLING WITH EXPOSED REBAR ON CROWN AT 50', 110',

260', 260', AND 340'.

EXPOSED REBAR ON WEST LINING AT 260'. MINOR TO MODERATE

CRACKING WITH EFFLORESCENCE ON WEST LINING AT 90', 105',

150' AND 390' FROM NORTH PORTAL; ON EAST LINING AT 25', 63',

140', 245', 280' AND 305'; AND ON CROWN APPROXIMATELY 50', 85'

AND 375' FROM NORTH PORTAL; WITH RUST STAINING AND

LEAKAGE. AREA OF DELAMINATION IN CROWN AT 260' POSING

THREAT TO MOTORISTS. MODERATE EFFLORESCENCE ALONG

CONSTRUCTION JOINT AT 165' FROM NORTH PORTAL.

MINOR CRACKING WITH RUST STAINING AND LEAKAGE ALONG

DRAIN CHASES IN CROWN APPROXIMATELY 85' AND 320' FROM

NORTH PORTAL AND ON EAST LINING APPROXIMATELY 220' FROM

NORTH PORTAL. MINOR LEAKAGE IN DRAIN CHASES IN SEVERAL

OTHER AREAS.

59.2 MINOR EFFLORESCENCE; MODERATE CRACKING ON

PORTAL/TUNNEL JOINT. MINOR TO MODERATE MOSS GROWTH AT

NORTH PORTAL. MINOR VINE GROWTH ON PORTALS.

59.4 MINOR CRACKING WITH RUST STAINING ALONG DRAIN CHASE

APPROXIMATELY 85' FROM NORTH PORTAL. NUMEROUS DRAIN

CHASES HAVE LEAKAGE.

59.5 MINOR LIMBS AND DEBRIS MAINLY IN WEST CURBLINE AND WEST

EDGE OF SOUTHBOUND LANE.

59.8 THREE MISSING REFLECTORS ALONG WEST LINING NEAR NORTH

PORTAL.

222.7 14'-3" CLEARANCE SIGN AT SOUTH APPROACH OBSCURED BY

VEGETATION. 14'-2" CLEARANCE SIGN AT NORTH APPROACH;

ACTUAL CLEARANCE IS 13'-0". "RATTLESNAKE MOUNTAIN TUNNEL"

SIGNS AT BOTH APPROACHES.

FIELD INSPECTION REPORT STRUCTURE NO. 5140-157P

ADDITIONAL ITEM REFERENCE AND REMARKS

222.9 STRIPING HAS BEEN EXTENDED 50' FROM EACH PORTAL BEFORE PREVIOUS INSPECTION. DAMAGE TO

STRIPING ALONG CENTERLINE IN SOUTH APPROACH.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5140-157P

STRUCTURE IDENTIFICATION

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

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

(203) STRUCTURE KIND: ............3 - TUNNEL (3) COUNTY CODE: ........................ 099 - JACKSON

(204) STRUCTURE NUMBER: ..... 5140-157P (4) CITY/PLACE CODE:

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

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

(207) ROAD SECTION NO: .......... 157P (7) FACILITY CARRIED: .................. BLUE RIDGE PARKWAY

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5140157P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 3.5 MILES TO U.S. ROUTE 4

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

(211) PROJECT NO(S): ................ 2Z8,2Z5 (11) MILE POINT: ............................. 465.69 (KM PT 749.44)

(212) DRAWING NUMBERS: ....... 00000 (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:

1 - CONCRETE

18 - TUNNEL

29.3 FT (8.9 M)

415.0 FT (126.5 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: .. 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: ......... A - OPEN, NO RESTRICTION

(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. 5140-157P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(51) CURB TO CURB WIDTH: ........... 29.3 FT (8.9 M) (16) LATITUDE: ............................. 35°31'12.80"

(17) LONGITUDE: ......................... 83°16'08.70"

(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: ........... 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

0 °

NO

29.3 FT (8.9 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)

14.08 FT (4.29 M)

14.08 FT (4.29 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

$2,000

$17,000

$0

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

2008-REFLECTORS REPLACED.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

APPENDIX STRUCTURE NO. 5140-157P

PHOTOGRAPHS STRUCTURE NO. 5140-157P

PHOTO #1 - NORTH PORTAL

PHOTO #2 - SOUTH PORTAL

PHOTO #3 - GENERAL UNDERSIDE VIEW

LOOKING SOUTH

PHOTO #4 - EFFLORESCENCE ON RING

STONES ON WEST SIDE OF NORTH PORTAL

PHOTO #5 - GENERAL ROADWAY VIEW

LOOKING SOUTH

PHOTO #6 - SPALL WITH EXPOSED REBAR

APPROXIMATELY 20' FROM NORTH PORTAL

PHOTO #7 - CRACKING WITH

EFFLORESCENCE ON CROWN

APPROXIMATELY 29' FROM NORTH PORTAL

PHOTO #8 - CRACKING WITH ACTIVE WATER

LEAKAGE, EFFLORESCENCE, AND RUST

STAINING NEAR CROWN APPROXIMATELY 50'

FROM NORTH PORTAL

PHOTO #9 - VERTICAL CRACKING AND ACTIVE

WATER LEAKAGE ON EAST LINING

APPROXIMATELY 50' FROM NORTH PORTAL

PHOTO #10 - CRACKING WITH

EFFLORESCENCE ON EAST LINING

APPROXIMATELY 63' FEET FROM NORTH

PORTAL

PHOTO #11 - CRACKING WITH

EFFLORESCENCE ON WEST LINING

APPROXIMATELY 90' FROM NORTH PORTAL

PHOTO #12 - CRACKING WITH

EFFLORESCENCE ON WEST LINING

APPROXIMATELY 105' FROM NORTH PORTAL

PHOTO #13 - SPALLING WITH EXPOSED

REBAR ON CROWN APPROXIMATELY 110'

FROM NORTH PORTAL

PHOTO #14 - CRACKING WITH

EFFLORESCENCE ON EAST WALL AT

APPROXIMATELY 140' FROM NORTH PORTAL

PHOTO #15 - MINOR SPALLING WITH EXPOSED

REBAR ON CROWN APPROXIMATELY 260'

FROM NORTH PORTAL

PHOTO #16 - EXPOSED REBAR, RUST ON

WEST TUNNEL LINING APPROXIMATELY 260'

FROM NORTH PORTAL

PHOTO #17 - PATCHING, CRACKING WITH EFFLORESCENCE, AND

STAINING ON DRAIN CHASE APPROXIMATELY 320' FROM NORTH

PORTAL, CROWN AREA

PHOTO #18 - CRACKING WITH EXPOSED REBAR AT CROWN

APPROXIMATELY 340' FROM NORTH PORTAL

PHOTO #19 - FULL VERTICAL CRACKING ON

EAST LINING APPROXIMATELY 370' FROM

NORTH PORTAL, ALSO AT 380' AND 390'

PHOTO #20 - EFFLORESCENCE AND RUST

STAINING ON WEST LINING APPROXIMATELY

390' FROM NORTH PORTAL

PHOTO #21 - DAMAGED ROADWAY STRIPING ALONG CENTERLINE AT

SOUTH APPROACH