Bridge_Inspection_Rpt_STR_5140-146P.pdf

TUNNEL INSPECTION REPORT

FERRIN KNOB TUNNEL #3

BLUE RIDGE PARKWAY THROUGH FERRIN KNOB

BLUE RIDGE PARKWAY

NP

STRUCTURE NO. 5140-146P

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 6/12/15

Report prepared by: SP

MILE POINT: 401.33

Federal Highway Administration KILOMETER POINT: 645.86 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. 5140-146P

FERRIN KNOB TUNNEL #3 INSPECTION DATE: 6/12/15

TUNNEL IDENTIFICATION AND DESCRIPTION

LINING MATERIAL: ............... CONCRETE MINIMUM VERTICAL CLR: .... 14.5 FT (4.4 M)

SPRINGLINE LENGTH: ........ 28.8 FT (8.8 M) STRUCT. TOTAL LENGTH: ... 402.0 FT (122.5 M)

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

PROJ./PLAN REF. NO: ......... 2S2,2S9,2S14 / YEAR RECONSTRUCTED:

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

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

LOCATION

BLUE RIDGE PARKWAY MILE POINT: ..................... 401.33 (KM PT 645.86)

STATE: .................................. NORTH CAROLINA LOCATION: 7.9 MILES TO NC ROUTE 191

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

FEATURE INTERSECTED: ... FERRIN KNOB

STRUCTURE EVALUATION SUMMARY

This concrete lined tunnel is in good condition overall, and has only minor problems at this time. These include several areas of minor spalling with exposed rebar on the lining and crown, missing reflectors from the lining and along the centerline striping, and vegetation growing from the masonry at both portals. In addition, the drainage inlet on the west side of the south portal is clogged with debris. Finally, there are several areas of cracking with efflorescence and leakage on the lining.

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. 5140-146P

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.

59.8 REPLACE MISSING AND DAMAGED REFLECTORS ALONG LINING. REPLACE

MISSING REFLECTORS ALONG CENTERLINE STRIPING.

1 LS $3,000 $3,000

59.2 REMOVE VEGETATION FROM MASONRY AT BOTH PORTALS. 1 LS $2,000 $2,000

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

PRELIM. MAINTENANCE TOTAL : $6,000

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS) QTY. UNIT UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

59.1 CLEAN AND SEAL LEAKY JOINTS. CLEAN EXPOSED REBAR ON

LINING AND CROWN AND SEAL WITH APPROVED PROTECTIVE

COATING.

1 LS $22,000 $24,000 $0

59 CONTRACT COSTS FOR MOBILIZATION, TRAFFIC CONTROL, AND

DESIGN/CONSTRUCTION ENGINEERING.

1 LS $16,000 $16,000 $0

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL : $40,000 $0

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL:

PRELIM. REHABILITATION TOTAL:

PRELIM. RECONSTRUCTION TOTAL: ...

TOTAL ITEMIZED COSTS:

$0 $40,000 $6,000

$46,000

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.)

$46,000

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

FIELD INSPECTION REPORT STRUCTURE NO. 5140-146P

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 7

G

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 8

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

59.1,4 MINOR SPALLING WITH EXPOSED REBAR ON EAST LINING

APPROXIMATELY 79', 146', 210', 240' AND 316' FROM NORTH PORTAL;

ON WEST LINING APPROXIMATELY 282' FROM NORTH PORTAL; AND

ON CROWN APPROXIMATELY 98', 189', 202', 237', AND 246' FROM

NORTH PORTAL.

MINOR CRACKING WITH EFFLORESCENCE AND LEAKAGE, MAINLY

AT DRAIN CHASE AREAS, NEAR PORTALS AND PREVIOUSLY

REPAIRED AREAS.

MODERATE CRACKING WITH EFFLORESCENCE AND LEAKAGE

ALONG WEST SIDE OF DRAIN CHASE APPROXIMATELY 227' FROM

NORTH PORTAL. PREVIOUSLY NOTED NON-FUNCTIONING DRAIN

CHASE APPROXIMATELY 275' FROM NORTH PORTAL COULD NOT BE

VERIFIED, NO LEAKAGE ONTO ROADWAY WAS NOTED DURING THIS

INSPECTION. PREVIOUS REPAIR OF DRAIN CHASES EVIDENT.

TRANSVERSE AND HORIZONTAL CRACKS WITH EFFLORESCENCE AT

SEVERAL LOCATIONS OF EAST AND WEST LINER.

59.2 MINOR TO MODERATE EFFLORESCENCE ON MASONRY RING

STONES AT BOTH PORTALS. MODERATE VEGETATION GROWTH ON

RING STONES OF BOTH PORTALS.

59.4 INLET ON WEST SIDE OF SOUTH APPROACH IS CLOGGED WITH

DEBRIS.

59.8 MISSING AND DAMAGED REFLECTORS ALONG EAST AND WEST

LINING. MOST REFLECTORS ARE MISSING FROM CENTERLINE OF

ROADWAY STRIPING.

222.4 MINOR TRANSVERSE CRACKING OF PAVEMENT AT BOTH

APPROACHES.

222.7 13'-11" VERTICAL CLEARANCE AND "TURN LIGHTS ON" SIGNS

POSTED AT SOUTH APPROACH. DUE TO CLOSENESS BETWEEN

TUNNELS, 13'-11" VERTICAL CLEARANCE SIGN IS POSTED AT NORTH

APPROACH TO TUNNEL #145. "FERRIN KNOB TUNNEL NO. 3" SIGNS

AT BOTH APPROACHES.

FIELD INSPECTION REPORT STRUCTURE NO. 5140-146P

ADDITIONAL ITEM REFERENCE AND REMARKS

222.9 MINOR TO MODERATE DETERIORATION OF EDGE OF ROADWAY STRIPING AT BOTH APPROACHES.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5140-146P

STRUCTURE IDENTIFICATION

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

(202) STRUCTURE NAME: .......... FERRIN KNOB TUNNEL #3 (2) STATE HWY. AGENCY DIST:

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

(204) STRUCTURE NUMBER: ..... 5140-146P (4) CITY/PLACE CODE:

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

(206) ROUTE CODE NUMBER: ... 1 (6) FEATURES INTERSECTED:....... FERRIN KNOB

(207) ROAD SECTION NO: .......... 146P (7) FACILITY CARRIED: .................. BLUE RIDGE PARKWAY

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5140146P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 7.9 MILES TO NC ROUTE 191

(210) OPERATING UNIT: ............. GILLESPE (10) INV. RTE. - MIN. VERT. CLR: .. 14.00 FT (4.27 M)

(211) PROJECT NO(S): ................ 2S2,2S9,2S14 (11) MILE POINT: ............................. 401.33 (KM PT 645.86)

(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:

1 - CONCRETE

18 - TUNNEL

28.8 FT (8.8 M)

402.0 FT (122.5 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?: ..................... 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. 5140-146P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(51) CURB TO CURB WIDTH: ........... 28.8 FT (8.8 M) (16) LATITUDE: ............................. 35°27'15.40"

(17) LONGITUDE: ......................... 82°40'31.90"

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

99 °

NO

21.8 FT (6.6 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)

14.50 FT (4.42 M)

14.50 FT (4.42 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

$6,000

$40,000

$0

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

1985-LINING REHABILITATION.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

APPENDIX STRUCTURE NO. 5140-146P

PHOTOGRAPHS STRUCTURE NO. 5140-146P

PHOTO #1 - NORTH PORTAL

PHOTO #2 - SOUTH PORTAL

PHOTO #3 - GENERAL UNDERSIDE VIEW LOOKING SOUTH

PHOTO #4 - MISSING REFLECTORS ALONG BOTH SIDES STARTING

APPROXIMATELY 100' FROM NORTH PORTAL; NOTE ALSO MISSING

REFLECTORS ALONG CENTER LINE

PHOTO #5 - DISPLACED REFLECTOR AT EAST

WALL NEAR NORTH PORTAL

PHOTO #6 - CRACKING WITH

EFFLORESCENCE ON WEST LINING AT NORTH

PORTAL

PHOTO #7 - TYPICAL EFFLORESCENCE ON

RING STONES, EAST SIDE OF NORTH PORTAL

SHOWN

PHOTO #8 - SPALLING WITH EXPOSED REBAR

ON EAST LINING APPROXIMATELY 79' FROM

NORTH PORTAL

PHOTO #9 - DIAGONAL CRACKING WITH

EFFLORESCENCE ON EAST LINING

APPROXIMATELY 100' FROM FROM NORTH

PORTAL

PHOTO #10 - CRACKING WITH

EFFLORESCENCE, WATER STAINING AND

ACTIVE WATER LEAKAGE ON EAST DRAIN

CHASE APPROXIMATELY 165' FROM NORTH

PORTAL

PHOTO #11 - SPALLING WITH EXPOSED REBAR ON CROWN

APPROXIMATELY 189' FROM NORTH PORTAL

PHOTO #12 - SPALLING WITH EXPOSED REBAR ON CROWN

APPROXIMATELY 202' FROM NORTH PORTAL

PHOTO #13 - SPALLING WITH EXPOSED

REBAR ON EAST LINING APPROXIMATELY 210'

FROM NORTH PORTAL; NOTE

EFFLORESCENCE

PHOTO #14 - SPALLING WITH EXPOSED

REBAR ON CROWN APPROXIMATELY 237'

FROM NORTH PORTAL

PHOTO #15 - GENERAL VIEW OF WEST DRAIN

CHASES APPROXIMATELY 275' FROM NORTH

PORTAL; NOTE PATCHING

PHOTO #16 - SPALLING WITH EXPOSED

REBAR ON WEST LINING APPROXIMATELY 282'

FROM NORTH PORTAL

PHOTO #17 - CRACKING WITH EFFLORESCENCE ON WEST LINING AT

SOUTH END

PHOTO #18 - CLOGGED INLET AT SOUTHWEST END; NOTE ALSO

TYPICAL DETERIORATION OF ROADWAY STRIPING