Bridge_Inspection_Rpt_STR_5140-151P.pdf

TUNNEL INSPECTION REPORT

FRYING PAN TUNNEL

BLUE RIDGE PARKWAY THROUGH FRYING PAN MOUNTAIN

BLUE RIDGE PARKWAY

NP

STRUCTURE NO. 5140-151P

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 6/13/15

Report prepared by: SP

MILE POINT: 410.02

Federal Highway Administration KILOMETER POINT: 659.85 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. 5140-151P

FRYING PAN TUNNEL INSPECTION DATE: 6/13/15

TUNNEL IDENTIFICATION AND DESCRIPTION

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

SPRINGLINE LENGTH: ........ 29.1 FT (8.9 M) STRUCT. TOTAL LENGTH: ... 582.0 FT (177.4 M)

CURB TO CURB WIDTH: ..... 29.1 FT (8.9 M) YEAR BUILT:

PROJ./PLAN REF. NO: ......... 2U7,2U1,2V10 / 00000 YEAR RECONSTRUCTED:

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

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

LOCATION

BLUE RIDGE PARKWAY MILE POINT: ..................... 410.02 (KM PT 659.85)

STATE: .................................. NORTH CAROLINA LOCATION: 1.8 MILES TO U.S. ROUTE 276

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

FEATURE INTERSECTED: ... FRYING PAN MOUNTAIN

STRUCTURE EVALUATION SUMMARY

This concrete lined tunnel is in fair condition overall. The main problem is the moderate deterioration, with significant leakage, of two drain chases. These drain chases are located approximately 500' and 506' from the north portal.

These drain chases have deteriorated to the point where the drain chase is exposed. The crown appears to be damp for the full length of the tunnel, indicating that water may be on top of the tunnel.

Other problems include minor spalling with exposed rebar on the crown, sections of the gravel along the east shoulder up to 6" lower than the roadway, and two missing reflectors on the east wall near the north portal. Also, the vertical clearance sign at the north approach is obscured by vegetation.

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. 5140-151P

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.

59.6 PROVIDE ADDITIONAL GRAVEL ALONG EAST SHOULDER AND LEVEL TO MATCH

HEIGHT OF ROADWAY.

1 LS $1,000 $1,000

59.8, 222.7 REPLACE MISSING REFLECTORS ALONG EAST TUNNEL LINING. POST ACTUAL

VERTICAL CLEARANCE AT BOTH APPROACHES. TRIM VEGETATION OBSCURING

NORTH VERTICAL CLEARANCE SIGN.

4 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.

59.4 REPLACE LEAKING DRAIN CHASES APPROXIMATELY 500' AND 506'

FROM NORTH PORTAL.

90 LF $750 $68,000 $0

59.1 CLEAN EXPOSED REBAR THROUGHOUT TUNNEL LINING AND SEAL

WITH APPROVED PROTECTIVE COATING.

1 LS $5,000 $5,000 $0

59 CONTRACT COSTS FOR MOBILIZATION, TRAFFIC CONTROL, AND

DESIGN/CONSTRUCTION ENGINEERING.

1 LS $52,000 $52,000 $0

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL : $125,000 $0

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL:

PRELIM. REHABILITATION TOTAL:

PRELIM. RECONSTRUCTION TOTAL: ...

TOTAL ITEMIZED COSTS:

$0 $125,000 $2,000

$127,000

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.)

$127,000

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

FIELD INSPECTION REPORT STRUCTURE NO. 5140-151P

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

G8. 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

F7. 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

TRAFFIC SAFETY RATING CODES

ITEM REFERENCE AND REMARKS

59.1,4 MINOR SPALLING WITH EXPOSED REBAR ON CROWN

APPROXIMATELY 53', 343', 390', AND 500' FROM NORTH PORTAL;

ATTEMPTS HAVE BEEN MADE TO PATCH SPALLING APPROXIMATELY

250' (ON WEST LINING) AND 343' (ON CROWN) FROM NORTH

PORTAL.

MODERATE SPALLING WITH EXPOSED REBAR AND DRAIN CHASES

ALONG EAST LINING APPROXIMATELY 500' AND ALONG WEST LINING

APPROXIMATELY 506' FROM NORTH PORTAL. CROWN APPEARS

DAMP INDICATING WATER ON TOP OF TUNNEL, FOR FULL LENGTH

OF TUNNEL.

MINOR TO MODERATE CRACKING WITH EFFLORESCENCE AND

LEAKAGE THROUGHOUT TUNNEL; INCLUDING PREVIOUS REPAIRED

DRAIN CHASES. SEVERAL CRACKS HAVE BEEN INJECTED AND

SEALED.

59.2 MINOR EFFLORESCENCE ON PORTAL MASONRY.

59.6 SECTION OF GRAVEL ALONG EAST SHOULDER UP TO 6" LOWER

THAN ROADWAY, POTENTIAL TRAFFIC HAZARD.

59.8 TWO MISSING REFLECTORS ON EAST WALL NEAR NORTH PORTAL.

222.7 "14'-2" TUNNEL" SIGNS POSTED AT BOTH APPROACHES. NORTH

VERTICAL CLEARANCE SIGN OBSCURED BY VEGETATION. "TURN

LIGHTS ON" AND "FRYING PAN TUNNEL" SIGNS AT BOTH

APPROACHES.

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.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5140-151P

STRUCTURE IDENTIFICATION

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

(202) STRUCTURE NAME: .......... FRYING PAN TUNNEL (2) STATE HWY. AGENCY DIST:

(203) STRUCTURE KIND: ............3 - TUNNEL (3) COUNTY CODE: ........................ 175 - TRANSYLVANIA

(204) STRUCTURE NUMBER: ..... 5140-151P (4) CITY/PLACE CODE:

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

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

(207) ROAD SECTION NO: .......... 151P (7) FACILITY CARRIED: .................. BLUE RIDGE PARKWAY

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5140151P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 1.8 MILES TO U.S. ROUTE 2

(210) OPERATING UNIT: ............. BALSAM (10) INV. RTE. - MIN. VERT. CLR: .. 13.67 FT (4.17 M)

(211) PROJECT NO(S): ................ 2U7,2U1,2V10 (11) MILE POINT: ............................. 410.02 (KM PT 659.85)

(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

29.1 FT (8.9 M)

582.0 FT (177.4 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. 5140-151P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(51) CURB TO CURB WIDTH: ........... 29.1 FT (8.9 M) (16) LATITUDE: ............................. 35°23'29.50"

(17) LONGITUDE: ......................... 82°46'25.00"

(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

0 °

NO

29.1 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)

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

D - MINOR

$2,000

$125,000

$0

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

1985-LINING REHABILITATION.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

APPENDIX STRUCTURE NO. 5140-151P

PHOTOGRAPHS STRUCTURE NO. 5140-151P

PHOTO #1 - NORTH PORTAL

PHOTO #2 - SOUTH PORTAL

PHOTO #3 - GENERAL UNDERSIDE VIEW LOOKING SOUTH

PHOTO #4 - GENERAL VIEW OF ROADWAY LOOKING SOUTH

PHOTO #5 - SPALLING, CRACKING, AND

ACTIVE WATER LEAKAGE AT DRAIN CHASE ON

EAST SIDE NEAR NORTH END

PHOTO #6 - CRACKING WITH

EFFLORESCENCE ON EAST SIDE

APPROXIMATELY 35' FROM NORTH PORTAL;

SIMILAR AT WEST LINING

PHOTO #7 - CRACKING WITH

EFFLORESCENCE ON CROWN NEAR NORTH

END

PHOTO #8 - CRACKING WITH

EFFLORESCENCE ON EAST LINING

APPROXIMATELY 53' FROM NORTH PORTAL

PHOTO #9 - SPALLING WITH EXPOSED REBAR ALONG CROWN

APPROXIMATELY 53' FROM NORTH PORTAL

PHOTO #10 - MISSING REFLECTORS ON EAST SIDE STARTING

APPROXIMATELY 85' FROM NORTH PORTAL AND EXTENDING SOUTH BY

APPROXIMATELY 50'

PHOTO #11 - EFFLORESCENCE ON

PREVIOUSLY REPAIRED DRAIN CHASE

APPROXIMATELY 200' FROM NORTH PORTAL

PHOTO #12 - EFFLORESCENCE ON

PREVIOUSLY REPAIRED DRAIN CHASE 208'

FROM NORTH PORTAL

PHOTO #13 - SPALLING WITH EXPOSED

REBAR ON DRAIN CHASE APPROXIMATELY

233' FROM NORTH PORTAL

PHOTO #14 - SPALL WITH EXPOSED REBAR ON

WEST SIDE APPROXIMATELY 250' FROM

NORTH PORTAL

PHOTO #15 - CRACKING WITH

EFFLORESCENCE ON WEST LINING

APPROXIMATELY 325' FROM NORTH PORTAL;

NOTE SEALED CRACK

PHOTO #16 - SPALL WITH EXPOSED REBAR ON

CROWN 343' FROM NORTH PORTAL

PHOTO #17 - SPALLING WITH EXPOSED

REBAR NEAR CROWN APPROXIMATELY 390'

FROM NORTH PORTAL

PHOTO #18 - SEALED CRACKING WITH

EFFLORESCENCE ON WEST WALL

APPROXIMATELY 400' FROM NORTH PORTAL

PHOTO #19 - MISSING GRAVEL ALONG EAST

SHOULDER APPROXIMATELY 450' FROM

NORTH PORTAL

PHOTO #20 - DETERIORATED CONCRETE AT

DRAIN CHASE ON EAST SIDE APPROXIMATELY

500' FROM NORTH PORTAL; NOTE RISK OF

CONCRETE FALLING ON ROADWAY

PHOTO #21 - SPALLING WITH EXPOSED

REBAR AT CROWN APPROXIMATELY 500' FROM

NORTH PORTAL

PHOTO #22 - MISSING REFLECTORS ALONG

CENTERLINE, LOCATION SHOWN IS

APPROXIMATELY 500' FROM NORTH PORTAL

PHOTO #23 - SPALLING WITH EXPOSED REBAR ALONG DRAIN CHASES

ON WEST LINING APPROXIMATELY 506' FROM NORTH PORTAL

PHOTO #24 - GENERAL VIEW OF CRACKING WITH EFFLORESCENCE

ON WEST SIDE APPROXIMATELY 542' FROM NORTH PORTAL