Bridge_Inspection_Rpt_STR_5140-153P.pdf

TUNNEL INSPECTION REPORT

PINNACLE RIDGE TUNNEL

BLUE RIDGE PARKWAY THROUGH PINNACLE RIDGE

BLUE RIDGE PARKWAY

NP

STRUCTURE NO. 5140-153P

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 6/16/15

Report prepared by: SP

MILE POINT: 439.70

Federal Highway Administration KILOMETER POINT: 707.61 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. 5140-153P

PINNACLE RIDGE TUNNEL INSPECTION DATE: 6/16/15

TUNNEL IDENTIFICATION AND DESCRIPTION

LINING MATERIAL: ............... CONCRETE MINIMUM VERTICAL CLR: .... 12.3 FT (3.8 M)

SPRINGLINE LENGTH: ........ 30.0 FT (9.1 M) STRUCT. TOTAL LENGTH: ... 859.0 FT (261.8 M)

CURB TO CURB WIDTH: ..... 30.0 FT (9.1 M) YEAR BUILT:

PROJ./PLAN REF. NO: ......... 2W5,2W2,2V13 / 00000 YEAR RECONSTRUCTED:

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

STRUCTURE HISTORY: ...... 1962-LINING EXTENSION, PORTAL WALLS. 1996-LINING REHABILITATION.

2008-REFLECTORS REPLACED.

LOCATION

BLUE RIDGE PARKWAY MILE POINT: ..................... 439.70 (KM PT 707.61)

STATE: .................................. NORTH CAROLINA LOCATION: 16.5 MILES TO NC ROUTE 215

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

FEATURE INTERSECTED: ... PINNACLE RIDGE

STRUCTURE EVALUATION SUMMARY

This concrete lined tunnel is in fair condition overall. The main problem is leakage from the crown of the lining onto the roadway surface below, approximately 825' from the north portal, which could cause hazardous driving conditions to motorists during freezing weather. The tunnel lining has numerous areas of cracking with efflorescence and leakage, along with several areas of exposed rebar throughout. Other problems include a missing drainage tile along the base of the west wall approximately 740' from the north portal, a missing clearance sign at the south approach, an incorrect clearance sign at the north approach, missing edge of roadway striping along both curblines at spots, and moderate gravel accumulation along the west curbline near the south portal.

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. 5140-153P

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 REPAINT EAST EDGE OF ROADWAY STRIPING APPROXIMATELY 35' FROM NORTH

PORTAL AND AT VARIOUS LOCATIONS.

1 LS $2,000 $2,000

222.7 POST CORRECT VERTICAL CLEARANCE SIGN AT NORTH APPROACH. 1 EA $300 $1,000

59.4 REMOVE GRAVEL ACCUMULATION FROM WEST CURBLINE NEAR SOUTH PORTAL

AND DEBRIS ALONG EAST CURBLINE.

1 LS $1,000 $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 DRAIN CHASES AS NECESSARY. 1 LS $70,000 $70,000 $0

59.1 CLEAN AND SEAL EXPOSED REBAR ON LINING WITH APPROVED

PROTECTING COATING.

1 LS $3,000 $3,000 $0

59.4 REPAIR LEAKING HOLE AT 825' FROM NORTH PORTAL. REPAIR

DRAIN TILE ALONG WEST BASE OF TUNNEL APPROXIMATELY 740'

FROM NORTH PORTAL.

1 LS $32,000 $32,000 $0

59 CONTRACT COSTS FOR MOBILIZATION, TRAFFIC CONTROL, AND

DESIGN/CONSTRUCTION ENGINEERING.

1 LS $75,000 $75,000 $0

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL : $180,000 $0

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL:

PRELIM. REHABILITATION TOTAL:

PRELIM. RECONSTRUCTION TOTAL: ...

TOTAL ITEMIZED COSTS:

$0 $180,000 $4,000

$184,000

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.)

$184,000

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

FIELD INSPECTION REPORT STRUCTURE NO. 5140-153P

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. F

WEARING SURFACE5. G

RIDEABILITY 6. G

LIGHTING 7. N

OTHER 8. (REFLECTORS/STRIPING) F

9. ADEQUACY OF OPENING SUFF

222. APPROACHES 7

N1. APPROACH SLABS

N2. RELIEF JOINTS

N3. APPROACH GUARDRAIL

G4. SURFACING

G5. EROSION

G6. SETTLEMENT

P7. 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

0 - Does not meet standards or a safety feature is required and none is provided.

1 - Meets currently acceptable standards.

ITEM REFERENCE AND REMARKS

59.1,4 MINOR SPALLING WITH EXPOSED REBAR ALONG LINING AT

FOLLOWING LOCATIONS FROM NORTH PORTAL: 220', 380'(CR),

464'(CR), 489'(CR), 560'(CR), 615', 669', 733', AND 752'. CR=CROWN.

MINOR CRACKING WITH HEAVY EFFLORESCENCE THROUGHOUT

TUNNEL. NUMEROUS AREAS OF PATCHING WITH MINOR CRACKING

OF SOME PATCHES. SPALL ON EAST SIDE AT 814' FROM NORTH

PORTAL. LEAKING CRACKS ON LINING AT 105', 155', AND 825' FROM

NORTH PORTAL.

LEAKING HOLE WITH EXPOSED REBAR NEAR CROWN IN DRAIN

CHASE AT 40' FROM NORTH PORTAL. LEAKING HOLE NEAR CROWN

AT 825' FROM NORTH PORTAL.

LEAKING DRAIN CHASES AT 40', 85', 700', 740', 764', 782', AND 834'

FROM NORTH PORTAL.

MISSING DRAINAGE TILE AT BASE OF WEST TUNNEL LINING

APPROXIMATELY 740' FROM NORTH PORTAL (NO VERIFIED DURING

THIS INSPECTION).

59.2 MINOR EFFLORESCENCE FROM MORTAR JOINTS AND MOSS

GROWTH AT BOTH PORTALS.

59.4,5 WATER LEAKAGE ON TUNNEL WEARING SURFACE APPROXIMATELY

50' FROM SOUTH PORTAL. DEBRIS AND GRAVEL ACCUMULATION,

AND VEGETATION GROWING IN EAST AND WEST CURBLINES ALONG

TUNNEL.

59.8 EDGE OF ROADWAY STRIPING IS MISSING ALONG EAST AND WEST

CURBLINE AT SEVERAL LOCATIONS.

222.7 VERTICAL CLEARANCE SIGN AT SOUTH APPROACH MISSING. 13'-11"

VERTICAL CLEARANCE SIGN AT NORTH APPROACH; SIGN IS

INCORRECT. ACTUAL CLEARANCE IS 12'-4".

N - Not applicable or a safety feature is not required.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5140-153P

STRUCTURE IDENTIFICATION

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

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

(203) STRUCTURE KIND: ............3 - TUNNEL (3) COUNTY CODE: ........................ 087 - HAYWOOD

(204) STRUCTURE NUMBER: ..... 5140-153P (4) CITY/PLACE CODE:

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

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

(207) ROAD SECTION NO: .......... 153P (7) FACILITY CARRIED: .................. BLUE RIDGE PARKWAY

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5140153P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 16.5 MILES TO NC ROUTE 21

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

(211) PROJECT NO(S): ................ 2W5,2W2,2V13 (11) MILE POINT: ............................. 439.70 (KM PT 707.61)

(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

30.0 FT (9.1 M)

859.0 FT (261.8 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. 5140-153P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(51) CURB TO CURB WIDTH: ........... 30.0 FT (9.1 M) (16) LATITUDE: ............................. 35°26'01.50"

(17) LONGITUDE: ......................... 83°01'59.10"

(19) DETOUR LENGTH: ............... 35 MI (56 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: ....................... 3.0 FT (0.9 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

15 °

NO

30.0 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)

12.33 FT (3.76 M)

12.33 FT (3.76 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

$4,000

$180,000

$0

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

1962-LINING EXTENSION, PORTAL WALLS. 1996-LINING REHABILITATION. 2008-REFLECTORS REPLACED.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

APPENDIX STRUCTURE NO. 5140-153P

PHOTOGRAPHS STRUCTURE NO. 5140-153P

PHOTO #1 - NORTH PORTAL

PHOTO #2 - SOUTH PORTAL

PHOTO #3 - GENERAL ROADWAY VIEW LOOKING SOUTH

PHOTO #4 - GENERAL UNDERSIDE VIEW LOOKING SOUTH

PHOTO #5 - WATER DRIPPING AT ROCK BANK

ON EAST SIDE OF NORTH PORTAL

PHOTO #6 - TYPICAL EFFLORESCENCE ON

RINGSTONES AT NORTH PORTAL

PHOTO #7 - CRACKING WITH EFFLORESCENCE ON EAST LINING NEAR

NORTH PORTAL

PHOTO #8 - SPALLING ON WEST LINING APPROXIMATELY 20' FROM

NORTH PORTAL

PHOTO #9 - SPALLING, EXPOSED REBAR, AND

LEAKAGE ON DRAIN CHASE AT CROWN

APPROXIMATELY 40' FROM NORTH PORTAL

PHOTO #10 - CRACKING WITH

EFFLORESCENCE ON EAST LINING

APPROXIMATELY 75' FROM NORTH PORTAL

PHOTO #11 - CRACKING WITH

EFFLORESCENCE WITH ACTIVE WATER

LEAKAGE ALONG DRAIN CHASE ON EAST

LINING APPROXIMATELY 85' FROM NORTH

PORTAL

PHOTO #12 - CRACKING WITH

EFFLORESCENCE ON EAST LINING

APPROXIMATELY 90' FROM NORTH PORTAL

PHOTO #13 - CRACKING WITH

EFFLORESCENCE WITH ACTIVE WATER

LEAKAGE ALONG ON EAST LINING

APPROXIMATELY 105' FROM NORTH PORTAL

PHOTO #14 - CRACKING AND

EFFLORESCENCE ON WEST LINING

APPROXIMATELY 115' FROM NORTH PORTAL

PHOTO #15 - CRACKING WITH

EFFLORESCENCE ON EAST LINING

APPROXIMATELY 120' FROM NORTH PORTAL

PHOTO #16 - SPALLING WITH LEAKAGE,

CRACKING AND EFFLORESCENCE ON WEST

TUNNEL LINING APPROXIMATELY 155' FROM

PHOTO #17 - CRACKING WITH

EFFLORESCENCE ALONG TUNNEL CROWN

APPROXIMATELY 155' FROM NORTH PORTAL

PHOTO #18 - CRACKING ON EAST LINING

APPROXIMATELY 155' FROM NORTH PORTAL

PHOTO #19 - CRACKING WITH

EFFLORESCENCE ON WEST LINING

APPROXIMATELY 210' FROM NORTH PORTAL

PHOTO #20 - SPALLING WITH EXPOSED

REBAR ON WEST LINING APPROXIMATELY 220'

FROM NORTH PORTAL

PHOTO #21 - CRACKING WITH

EFFLORESCENCE ON EAST LINING

APPROXIMATELY 314' FROM NORTH PORTAL

PHOTO #22 - SPALLING WITH EXPOSED

REBAR ON CROWN APPROXIMATELY 464'

PHOTO #23 - VERTICAL CRACKING IN WEST

LINING APPROXIMATELY 484' FROM NORTH

PORTAL

PHOTO #24 - SPALLING WITH EXPOSED

REBAR ON CROWN APPROXIMATELY 489'

PHOTO #25 - SPALL WITH EXPOSED REBAR

APPROXIMATELY 509' FROM NORTH PORTAL

PHOTO #26 - FADED PAVEMENT STRIPE ON

EAST SIDE STARTING APPROXIMATELY 539'

FROM NORTH PORTAL GOING SOUTH

PHOTO #27 - EXPOSED REBAR IN CROWN OF TUNNEL LINING

APPROXIMATELY 560' FROM NORTH PORTAL

PHOTO #28 - FADED PAVEMENT STRIPE ON WEST SIDE AT 649' FROM

PHOTO #29 - SPALL ON EAST LINING APPROXIMATELY 615' FROM

NORTH PORTAL

PHOTO #30 - SPALL WITH EXPOSED REBAR APPROXIMATELY 669'

PHOTO #31 - CRACKING WITH

EFFLORESCENCE ON WEST LINING

APPROXIMATELY 709' FROM NORTH PORTAL

PHOTO #32 - CRACKING WITH

EFFLORESCENCE AND ACTIVE WATER

LEAKAGE ALONG DRAIN CHASE

APPROXIMATELY 700' FROM NORTH PORTAL

PHOTO #33 - SPALL WITH EXPOSED REBAR ON

CROWN APPROXIMATELY 733' FROM NORTH

PORTAL

PHOTO #34 - CRACKING WITH

EFFLORESCENCE AND SPALLING ON EAST

LINING APPROXIMATELY 739' FROM NORTH

PORTAL

PHOTO #35 - CRACKING WITH

EFFLORESCENCE ON WEST LINING

APPROXIMATELY 739' FROM NORTH PORTAL

PHOTO #36 - SPALLING WITH EXPOSED

REBAR ON CROWN APPROXIMATELY 752'

PHOTO #37 - CRACKING WITH

EFFLORESCENCE AND ACTIVE WATER

LEAKAGE APPROXIMATELY 740' FROM NORTH

PORTAL

PHOTO #38 - CRACKING WITH

EFFLORESCENCE AND ACTIVE WATER

LEAKAGE ALONG DRAIN CHASE

APPROXIMATELY 752' FROM NORTH PORTAL

PHOTO #39 - CRACKING WITH

EFFLORESCENCE ON EAST LINING

APPROXIMATELY 759' FROM NORTH PORTAL

PHOTO #40 - CRACKING WITH

EFFLORESCENCE AND ACTIVE WATER

LEAKAGE ALONG DRAIN CHASE ON WEST

LINING APPROXIMATELY 764' FROM NORTH

PHOTO #41 - CRACKING WITH

EFFLORESCENCE ALONG DRAIN CHASE ON

WEST LINING 782' FROM NORTH PORTAL

PHOTO #42 - CRACKING WITH

EFFLORESCENCE NEAR CROWN ON WEST

LINING APPROXIMATELY 814' FROM NORTH

PHOTO #43 - SPALLING ALONG BOTTOM OF EAST LINING

APPROXIMATELY 814' FROM NORTH PORTAL

PHOTO #44 - HORIZONTAL AND DIAGONAL CRACKING WITH

EFFLORESCENCE ON EAST LINING APPROXIMATELY 825' FROM NORTH

PHOTO #45 - CRACKING WITH

EFFLORESCENCE AND ACTIVE WATER

LEAKAGE ON WEST LINING APPROXIMATELY

825' FROM NORTH PORTAL

PHOTO #46 - CRACKING WITH

EFFLORESCENCE AND SPALLING IN DRAIN

CHASE APPROXIMATELY 834' FROM NORTH

PHOTO #47 - CRACKING WITH EFFLORESCENCE AND HONEYCOMBING

ON EAST LINING APPROXIMATELY 836' FROM NORTH PORTAL