Boulder County, CO
311 public highway bridges
Boulder County Bridge Snapshot
Boulder County, Colorado contains 311 public highway bridges in the FHWA National Bridge Inventory. Roughly 33.4% are rated “Good,” 60.5% “Fair,” 2.3% “Poor,” and 2.3% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.
Inspections in CO are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Condition Distribution
All Bridges (311)
EBND US 36 ML
UnknownOver: US 36 SPUR/BASELINE RD
IN BOULDER, Boulder, CO
US 36 WBND SPUR
UnknownOver: US 36 SPUR/BASELINE RD
S end of BOULDER, Boulder, CO
SH 157 ML
UnknownOver: SH 119 ML
IN BOULDER, Boulder, CO
47TH STREET
UnknownOver: SH 157 ML
NEAR SH 119 IN BOULDER, Boulder, CO
TABLE MESA DRIVE
UnknownOver: US 36 ML
IN BOULDER, Boulder, CO
SH 157 RAMP
UnknownOver: US 36 ML
IN BOULDER, Boulder, CO
SH170 ML(McCaslin)
UnknownOver: US 36 ML
3.9 MI E OF JCT SH 93, Boulder, CO
EMMA ST.
UnknownOver: US 287 ML
IN LAFAYETTE, Boulder, CO
CHERRYVALE ROAD
UnknownOver: SH 36 ML
1.4 MI E OF JCT SH 157, Boulder, CO
WB US 36 ON RAMP
UnknownOver: WB BUS RAMP/BIKE PATH
MCCASLIN and US 36, Boulder, CO
EB US 36 OFF RAMP
UnknownOver: EB BUS RAMP
McCASLIN and US 36, Boulder, CO
Pratt Parkway
UnknownOver: BNRR and 1st Avenue
0.2 Mi N of Boston Ave, Boulder, CO
Co Rd 54A
FairOver: Middle Boulder Creek
Castle Rock Pull Off, Boulder, CO
BOULDER CREEK PATH
FairOver: BOULDER CREEK
4Mi Canyon Path at SH119, Boulder, CO
SH 157 ML
FairOver: PEARL STREET
2.9 MI N OF US 36, Boulder, CO
SH 157 ML
FairOver: BNSF RR
IN BOULDER, Boulder, CO
Oxford Rd (Cr 26)
FairOver: Boulder Feeder Ditch
0.3 Mi W of Co Rd 41, Boulder, CO
SH 93 ML
FairOver: SOUTH BOULDER CREEK
0.4 MI N OF JCT SH 170 +, Boulder, CO
US 36 ML EBND
FairOver: BOULDER CREEK
IN BOULDER, Boulder, CO
US 287 ML
FairOver: DRY CREEK
Ken Pratt Blvd-Longmont, Boulder, CO
SH 119 ML
FairOver: BOULDER CREEK
13.7 MI E OF JCT SH 72, Boulder, CO
SH 119 ML
FairOver: BOULDER CREEK
JUST WEST OF BOULDER, Boulder, CO
120TH STREET
FairOver: Rock Creek
0.5 Mi S of S. Boulder Rd, Boulder, CO
County Road 47
FairOver: St. Vrain Supply Canal
2.7 Mi N of St Hwy 66, Boulder, CO
County Road 130
FairOver: Middle Boulder Creek
2.5 Mi W of St Hwy 72, Boulder, CO
Rogers Road
FairOver: Lykin Gulch
0.25 Mi W of Airport Rd, Boulder, CO
SH 72 ML
FairOver: MIDDLE ST VRAIN CREEK
7 MI NORTH OF WARD, Boulder, CO
SH 170 ML
FairOver: SOUTH BOULDER CREEK
0.9 MI W. OF EL DORADO SP, Boulder, CO
SH 7 ML
FairOver: BEAR CANYON CREEK
JCT 157 & ARAPAHOE, Boulder, CO
Folsom Street
FairOver: Goose Creek
300 Ft. So. of Valmont, Boulder, CO
US 287 ML
FairOver: LEFT HAND CREEK
IN LONGMONT, Boulder, CO
St Vrain Road CR16
FairOver: Boulder Feeder Ditch
0.5 Mi E of Co Rd 51, Boulder, CO
SH 170 ML
FairOver: COMMUNITY DITCH
E ENT ELDORADO STATE PARK, Boulder, CO
55th Street
FairOver: Empson Ditch
250 Ft N of Penn. Ave., Boulder, CO
US 36 ML
FairOver: FOUR MILE CANYON CREEK
28th ST in BOULDER, Boulder, CO
US 36 ML
FairOver: SUPPLY DITCH
IN LYONS, Boulder, CO
FDR 298 & BC 116
FairOver: NORTH BOULDER CREEK
3.45 MI SW OF CO HWY 72, Boulder, CO
SH 157 ML
FairOver: BEAR CANYON CREEK
NEAR COLORADO AVE., Boulder, CO
C. R. 41 (63rd St)
FairOver: St. Vrain Creek
0.5 Mi N of Co Rd 10, Boulder, CO
Boston Ave (Cr 18)
FairOver: St. Vrain Creek
0.1 Mi E of Co Rd 15, Boulder, CO
Brockway Drive
FairOver: Goodhue Ditch
0.1 Mi E of 76th Street, Boulder, CO
Co Rd 54A
FairOver: Middle Boulder Creek
Castle Rock Pull Off, Boulder, CO
Rock Creek Pkwy.
FairOver: Rock Creek
0.3 Mi N of Coalton D, Boulder, CO
SH 72 ML
FairOver: SOUTH ST VRAIN CREEK
3.8 MI NORTH OF WARD, Boulder, CO
COUNTY ROAD 116
FairOver: BOULDER CREEK
3.3 MI WEST OF ST HWY 72, Boulder, CO
SH 170 ML
FairOver: DAVIDSON DITCH
1.5 MI W OF JCT SH 93, Boulder, CO
County Road 31
FairOver: St. Vrain Creek
0.6 Mi S of Co Rd 10, Boulder, CO
SH 93 ML
FairOver: BOULDER CREEK
N. of Arapahoe Ave, Boulder, CO
US 36 ML
FairOver: CANYON CREEK
IN BOULDER, Boulder, CO
SH 119 ML
FairOver: OLIGARCHY DITCH
IN LONGMONT, Boulder, CO
Read our methodology — how this data is sourced, computed, and verified.
Related
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |