NC NP BLRI BR 5140-091P_Bridge_Insp_Rpts_adv-redacted.pdf
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- Blue Ridge Parkway
- Solicitation number
- 693C73-26-B-000005
About this file
This is a Bridge Inspection Report for the U.S. Route 421 Bridge on the Blue Ridge Parkway, conducted by the Federal Highway Administration's FLH Office of Bridges and Structures on July 20, 2023. The inspection reveals the bridge is in poor overall condition, with significant structural issues including severe settlement at the northwest approach causing the retaining wall to lean outward up to 5" horizontally and 2" vertically. Additional problems include debris accumulation, vegetation growth, cracking and delamination of the concrete overlay, loose stones at various locations, and deteriorating mortar joints.
The prestressed concrete box girder bridge, built in 2001, spans 267.4 feet with a deck width of 35.6 feet and is located 15.0 miles from NC Route 16. The inspection team noted multiple critical concerns such as loose masonry capstones, fallen stones, bulging fascia stones, and potential dangers to the traveling public. A major rehabilitation project (NC NP BLRI BR 5140-091P) is planned to address these issues, and the movement of the masonry retaining wall and settlement will continue to be monitored. The bridge's load rating meets or exceeds design load specifications, with inventory and operating ratings for various truck types provided in the report.
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Other files
| File | Type | Posted |
|---|---|---|
| Results of Bid Opening - NC NP BLRI 5140-091P.pdf | ||
| VETS-4212 Form.pdf | ||
| FP24_Eng.pdf | ||
| Categorical Exclusion Form (NEPA).pdf | ||
| IFB Solicitation - NC NP BLRI BR 5140-091P.pdf | ||
| ADV_Bidders Qualifications Form.doc | DOC document | |
| Plans - NC NP BLRI BR 5140-091P.pdf |
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Text version
BRIDGE INSPECTION REPORT
U.S. ROUTE 421 BRIDGE
BLUE RIDGE PARKWAY OVER U.S. ROUTE 421
BLUE RIDGE PARKWAY
LOOKING SOUTH
STRUCTURE NO. 5140-091P
INSPECTION TYPE: ROUTINE
INSPECTION DATE: 7/20/2023
EAST SIDE
Report prepared by:
Federal Highway Administration FLH Office of Bridges and Structures Bridge Inspection Program 22001 Loudoun County Parkway, Building E2, Suite 200 Ashburn, VA 20147 https://bridge.flhd.fhwa.dot.gov
MILE POINT: 276.35
KILOMETER POINT: 444.65
STRUCTURE SUMMARY STRUCTURE NO. 5140-091P
U.S. ROUTE 421 BRIDGE INSPECTION DATE: 07/20/2023
cracking and delamination of the high-performance concrete overlay; cracked joint armor, including the welds; leakage through the access hatch into the approach span, resulting in erosion of the slope (not verified during 2023 inspection); leakage through the vertical joint between the northwest retaining wall and the adjacent wingwall; efflorescence leaching onto the deck from the east parapets; and wide cracking of the south abutment breastwall.
Corrective action should be taken as outlined in this report to prevent the possible development of more serious or costly problems in the future. It should be noted that a major rehabilitation project (NC NP BLRI BR 5140-091P) is to be completed under the direction of FHWA. The apparent movement of the masonry retaining wall and settlement at the north end of the structure will continue to be monitored.
STRUCTURE LOAD RATING STRUCTURE NO. 5140-091P
TRUCK TYPE
INVENTORY RATING (NORMAL TRAFFIC) OPERATING RATING (MAXIMUM LOAD)
TONS METRIC TONS TONS METRIC TONS
H 20 18 33 30
HS 36 33 60 54
TYPE 3 25 23 41 37
TYPE 3S2 36 33 60 54
TYPE 3-3 40 36 66 60
DESIGN LOADING: A - HL 93
X CAPACITY MEETS OR EXCEEDS DESIGN LOAD
CAPACITY IS LESS THAN DESIGN LOAD
ORIGINAL LOAD RATING CALCULATION APPLICABLE
ORIGINAL LOAD RATING CALCULATION REVISED
DATE OF LOAD RATING CALCULATION: 06/24/2016
LOAD RATING CONTROLLED BY:
REMARKS: RATING IS BASED ON DESIGN LOAD OF STRUCTURE.
SEE BRIDGE FILE FOR LOAD RATING CALCULATIONS.
STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5140-091P
STRUCTURE IDENTIFICATION
(201) PARK: BLUE RIDGE PARKWAY
(202) STRUCTURE NAME:..............U.S. ROUTE 421 BRIDGE
(203) STRUCTURE KIND:............... 1 - BRIDGE
(204) STRUCTURE NUMBER:.........5140-091 P
4 - SOUTHEAST(205) NPS REGION:
(206) ROUTE CODE NUMBER:
(207) ROAD SECTION NO:
(208) NPS ROAD CLASS:............... 1 - PRINCIPAL PARK ROAD
(209) WITHIN NPS BNDRY?:.......... Yes
(210) OPERATING UNIT:.................BLUFFS
(211) PROJECT NO(S):................... 2F12
(212) DRAWING NUMBERS:
(21) MAINTAINED BY:......................66 - NATIONAL PARK SERVICE
(22) OWNER:................................... 66 - NATIONAL PARK SERVICE
(1) STATE:
(2) STATE HWY. AGENCY DIST:
(3) COUNTY CODE:
(4) CITY / PLACE CODE:
(5) INVENTORY ROUTE:
(6) FEATURES INTERSECTED:
(7) FACILITY CARRIED:
(8) STATE STRUCTURE NO:
(9) LOCATION:
(10) INV. RTE. - MIN. VERT. CLR:
(11) MILE POINT:
(27) YEAR BUILT:
(106) YEAR RECONSTRUCTED:
(20) TOLL:
(37) HISTORIC DESIGNATION:
374 - NORTH CAROLINA
37189 WATAUGA
00000
1 6 1 00001 0
U.S. ROUTE 421
BLUE RIDGE PARKWAY
5140091P0000000
15.0 MILES FROM NC ROUTE 16
99.99 FT ( 99.99 M)
276.3 (KM PT: 444.6)
5 5
3 - ON FREE ROAD
5 - NOT ELIGIBLE
STRUCTURE DESCRIPTION, FOUNDATION, AND DECK TYPE
(43A) MAIN STR. MATERIAL:..........5 - PRESTRESSED CONCRETE
(43B) MAIN STR. TYPE:.................. 06 - BOX BEAM OR GIRDERS -
SINGLE OR SPREAD
(45) NO. OF MAIN SPANS:
(48) MAX. SPAN LENGTH:..............144. FT ( 43.9 M)
(49) STRUCTURE LENGTH:........... 267. FT ( 81.5 M)
(216A) ABUTMENT #1 FDN:........... 2 - SPREAD FTG ON BEARING MAT'L
(216B) ABUTMENT #2 FDN:........... 2 - SPREAD FTG ON BEARING MAT'L
(217A) PREDOM. PIER FDN:.......... 2 - SPREAD FTG ON BEARING MAT'L
(217B) SECOND. PIER FDN:.......... 6 - N/A
(107) DECK TYPE:.......................... 1 - CONCRETE CAST-IN-PLACE
(44A) APPR. STR. MATERIAL:............ 0 - Other
(44B) APPR. STR. TYPE:.................... 00 - OTHER
(46) NO OF APPROACH SPANS:
(108) WEAR SURFACE/PROTECT SYSTEM:
A) TYPE WEARING SURFACE:.. 3 - LATEX CONCRETE OR SIMILAR
ADDITIVE
B) TYPE MEMBRANE:................. 0 - NONE
C) TYPE PROTECTION:.............. 0 - NONE
(218) IS SALT USED?.......................... NO
LOAD RATING AND POSTING
(31) DESIGN LOAD:.........................A - HL 93 (41) LOAD RESTRICTION:.................. A - OPEN
(66) INVENTORY RATING:..............36 METRIC TONS) (70) BRIDGE POSTING:...................... 5 - EQUAL TO OR ABOVE LEGALTONS ( 32.7
LOADS
(64) OPERATING RATING:..............60.1 TONS ( 54.5 METRIC TONS)
INSPECTION DATES
(90) INSPECTION DATE: 07/20/2023 (91) FREQ. OF INSP: 24 MONTHS (92 / 93) CRITICAL FEATURE INSPECTION (CFI):
(219) ADD. STUDIES NEEDED: N - 0 - NONE (A) FRACTURE CRITICAL:.......... N
(220) SPECIAL STUDY TYPE: 0 - NONE INSP. EVERY MONTHS - LAST INSP:
(221) SPECIAL STUDY DATE: (B) UNDERWATER:..................... N
INSP. EVERY MONTHS - LAST INSP:
(C) SPECIAL INSPECTION:........ N
INSP. EVERY MONTHS - LAST INSP:
STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5140-091P
GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA
(16) LATITUDE:................................ 36° 13'48 80" (51) CURB TO CURB WIDTH:............ 31.6 FT ( 9.6 M)
(17) LONGITUDE:............................ 81°29 '59 00" (52) DECK WIDTH:.......................... 35.6 FT ( 10.9 M)
(19) DETOUR LENGTH:.................. 40 MI ( 64 KM) (32) APPR. ROADWAY WIDTH:...... 35.0 FT ( 10.7 M)
(28A) LANES ON STRUCT:.............02 (213) APPR. PAVEMENT WIDTH:... 22.0 FT ( 6.7 M)
(28B) LANES UNDER STRUCT:......02 LEFT SHOULDER:............... 7 0 FT ( 2.1 M)
(42A) SERVICE ON:.........................1 - HIGHWAY RIGHT SHOULDER:.......... 6 0 FT ( 1.8 M)
(42B) SERVICE UNDER:................. 1 - HIGHWAY, WITH OR W/OUT (33) BRIDGE MEDIAN:.................... 0 - NO MEDIAN
PEDESTRIAN
(29) AVG DAILY TRAFFIC:..............2300 (34) SKEW ANGLE:......................... 50 °
(30) YEAR OF ADT:......................... 2013 (35) STRUCTURE FLARED:............ 0 - NO FLARE
(114) FUTURE ADT:.........................2530 (47) TOTAL HORIZ. CLEARANCE:.. 31.6 FT ( 9.6 M)
(115) YEAR OF FUTURE ADT:........2033 (50) SIDEWALKS
(101) PARALLEL STRUCTURE:......N - NO PARALLEL STRUCTURE LEFT:.................................... 0 0 FT ( 0 M)
(38) NAVIGATION CONTROL:.........N RIGHT:.................................. 0 0 FT ( 0 M)
(39) VERTICAL CLEARANCE:.........0 FT ( 0 M) (214) BRIDGE RAIL TYPE
(40) HORIZ. CLEARANCE:..............0 FT ( 0 M) RAIL CONFIGURATION:...... 3 - PARAPET ONLY
(111) ABUT OR PIER PROT:........... MATERIAL:........................... 9 - OTHER
LATERAL UNDERCLEARANCE: DESIGN TYPE:..................... 1 - CONTINUOUS RAIL
(55) RIGHT:..............................5.30 FT ( 1.62 M) (215) BRIDGE RAIL HEIGHT:.......... 2.46 FT ( 0.75 M)
(56) LEFT:................................ 9.4 FT ( 2.9 M) (53) MIN. VRT. CLR. OVER DECK: 99.99 FT ( 99.99 M)
(54) MIN. VRT. UNDRCLRANCE:... 21.42 FT ( 6.53 M)
CONDITION AND APPRAISAL DATA, PROPOSED IMPROVEMENTS, AND COST
(58) DECK:....................................... 5 (67) STRUCTURAL EVALUATION:
(59) SUPERSTRUCTURE:...............6 (68) DECK GEOMETRY:
(60) SUBSTRUCTURE:.......... 4 (69) UNDERCLEARANCES:................ N
(61) CHANNEL:................................N (71) WATERWAY ADEQUACY:........... N
(62) CULVERT:.................................N (72) APPROACH ALIGNMENT:
(222) APPROACHES:...................... 4 (113) SCOUR CRITICAL:.................... N - NOT OVER WATERWAY
(223) RETAINING WALL:.................4 (225) PURPOSE OF IMPROVEMENT: 2 - REHAB/RECONSTRUCTION
(36) TRAFFIC SAFETY FEAT: 1 1 1 1 (226) PRIORITY OF IMPROVEMENT: B - MAJOR
(75A) TYPE OF WORK:................... (227) MAINTENANCE COST:.............$
(75B) WORK DONE BY:.................. (228) REHAB / RECNSTR COST:..... $
(76) IMPROVEMENT LENGTH:....... FT ( 0 M) (229) CONSTRUCTION COST:.......... $
ADDITIONAL INFORMATION
(230) STRUCTURE HISTORY:
2001-STRUCTURE REPLACED; 2009-DECK SEALED
(231) ADDITIONAL CONSIDERATIONS:
ACCESS ABUTMENT SPANS THROUGH SIDEWALK HATCHES.
(330) ADDITIONAL CONFIGURATION INFORMATION:
Inspector: Joshua Voight Structure Number: 5140091P0000000
Inspection Date: 07/20/2023 Facility Carried: BLUE RIDGE PARKWA
Bridge Inspection Report
Pictures
PHOTO 3
Description LOOKING NORTH (2021)
PHOTO 4
Description WEST SIDE
Bridge Inspection Report
Pictures
PHOTO 5
Description GENERAL TOPSIDE, LOOKING SOUTH
PHOTO 6
Description TYPICAL POPOUTS IN DECK SURFACE; NORTH OF CENTER PIER SHOWN
Bridge Inspection Report
Pictures
PHOTO 7
Description TYPICAL EPOXY INJECTION REPAIR IN BRIDGE DECK
PHOTO 8
Description TYPICAL EFFLORESCENCE ALONG EAST EDGE OF DECK; SOUTH END SHOWN
Bridge Inspection Report
Pictures
PHOTO 9
Description RADIAL CRACKING DUE TO SETTLEMENT AT WEST END OF NORTH APPROACH
PHOTO 10
Description EPOXY INJECTION REPAIRS AT NORTH APPROACH; NOTE CRACKING
Bridge Inspection Report
Pictures
PHOTO 11
Description SOUTH JOINT; NOTE VEGETATION GROWTH AND DEBRIS ACCUMULATION AT JOINT ENDS
PHOTO 12
Description FRACTURED JOINT ARMOR AT NORTH JOINTL NOTE CRACKING THROUGHOUT
Bridge Inspection Report
Pictures
PHOTO 13
Description 2" VERTICAL MISALIGNMENT AT NORTHWEST APPROACH PARAPET AND RETAINING WALL
PHOTO 14
Description 5" HORIZONTAL MISALIGNMENT AND 2" VERTICAL MISALIGNMENT AT NORTHWEST
RETAINING WALL
Bridge Inspection Report
Pictures
PHOTO 15
Description 1-1/4" SEPARATION BETWEEN NORTHWEST PARAPET AND APPROACH SLAB; NOTE
DETERIORATION OF JOINT MATERIAL
PHOTO 16
Description OUTSIDE FACE OF NORTHWEST APPROACH PARAPET; NOTE MISALIGNMENT AND
SURVEY MARKERS THROUGHOUT
Bridge Inspection Report
Pictures
PHOTO 17
Description SERIES OF VOIDS AND UNDERMINING IN WEST SHOULDER OF NORTH APPROACH;
FOOTING UNDERMINED UP TO 11", HOLE UP TO 2'D
PHOTO 18
Description UNDERMINING UP TO 11"U OF NORTHWEST APPROACH PARAPET
Bridge Inspection Report
Pictures
PHOTO 19
Description SETTLEMENT, UNDERMINING, AND VOIDS AT WEST SHOULDER OF NORTH APPROACH
PHOTO 20
Description DETACHED JOINT SEALANT AT SOUTH APPROACH SLAB ALONG EAST PARAPET
Bridge Inspection Report
Pictures
PHOTO 21
Description DETERIORATION OF MORTAR JOINTS IN EAST PARAPET AT NORTH END
PHOTO 22
Description BROKEN DRAIN GRATE AT NORTHWEST APPROACH
Bridge Inspection Report
Pictures
PHOTO 23
Description WATER LEAKING OVER PARAPET AT NORTHWEST APPROACH
PHOTO 24
Description GENERAL UNDERSIDE VIEW OF SOUTH SPAN, LOOKING NORTH
Bridge Inspection Report
Pictures
PHOTO 25
Description GENERAL VIEW OF WEST RING STONE AT SOUTH ARCH; NOTE EFFLORESCENCE
PHOTO 26
Description GENERAL UNDERSIDE VIEW OF NORTH SPAN, LOOKING NORTH
Bridge Inspection Report
Pictures
PHOTO 28
Description NORTH ABUTMENT
PHOTO 29
Description TYPICAL CRACKING AND EFFLORESCENCE ON SOUTH ABUTMENT BREASTWALL; NOTE
CORE PATCH
Bridge Inspection Report
Pictures
PHOTO 30
Description CRACKING UP TO 0.06"W IN SOUTH ABUTMENT BREASTWALL
PHOTO 31
Description CRACKING UP TO 0.25"W IN SOUTH ABUTMENT BREASTWALL
Bridge Inspection Report
Pictures
PHOTO 32
Description TYPICAL WIDESPREAD CRACKING IN SOUTH ABUTMENT BREASTWALL
PHOTO 33
Description LOSS OF JOINT MATERIAL BETWEEN NORTH ABUTMENT BREASTWALL AND NORTHWEST
WINGWALL
Bridge Inspection Report
Pictures
PHOTO 34
Description EFFLORESCENCE AND STAINING LEACHING FROM BEARING SEAT AT NORTH ABUTMENT
PHOTO 35
Description MAP CRACKING WITH EFFLORESCENCE AT WEST END OF NORTH ABUTMENT
Bridge Inspection Report
Pictures
PHOTO 36
Description LOOSE STONES AT SOUTHWEST WINGWALL
PHOTO 37
Description LOOSE STONE AT WEST END OF SOUTH ABUTMENT
Bridge Inspection Report
Pictures
PHOTO 38
Description LOOSE STONES AT WEST END OF SOUTH ABUTMENT
PHOTO 39
Description DETERIORATED MORTAR, VOIDS, AND FALLEN STONE AT WEST END OF SOUTH
ABUTMENT
Bridge Inspection Report
Pictures
PHOTO 40
Description SOUTH FACE OF PIER
PHOTO 41
Description EXPOSED REBAR IN SOUTH FACE AT WEST END OF PIER
Bridge Inspection Report
Pictures
PHOTO 42
Description HORIZONTAL CRACKING WITH EFFLORESCENCE AND AREAS OF DELAMINATION
THROUGHOUT SOUTH FACE OF PIER; NOTE FALLEN CORE PATCH
PHOTO 43
Description SEPARATION AND BOWING OF MASONRY NOSING AT EAST NOSE OF PIER
Bridge Inspection Report
Pictures
PHOTO 44
Description GENERAL VIEW OF THE DELAMINATION, CRACKING, SEPARATION, AND LOSS OF JOINT
MATERIAL AT EAST NOSE OF PIER
PHOTO 45
Description SEPARATION OF EAST NOSE JOINT MATERIAL AT PIER
Bridge Inspection Report
Pictures
PHOTO 47
Description GAP BETWEEN EAST NOSING AND PIER
PHOTO 48
Description DISPLACED STONE AT NORTHWEST RETAINING WALL
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