Larimer County, CO

559 public highway bridges

Larimer County Bridge Snapshot

Larimer County, Colorado contains 559 public highway bridges in the FHWA National Bridge Inventory. Roughly 47.4% are rated “Good,” 46.3% “Fair,” 2% “Poor,” and 2% 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.

559
Total Bridges
47.4%
Good
2%
Poor
2%
Structurally Deficient

Condition Distribution

Good
47.4% (265)
Fair
46.3% (259)
Poor
2% (11)
SD
2% (11)

All Bridges (559)

Rossum Drive

Good

Over: Big Barnes Ditch

0.1 Mi South of US 34, Larimer, CO

Built 2002 Load: 33.7 t ADT: 1,371

County Road 103

Good

Over: Laramie River

15. Mi N of St Hwy 14, Larimer, CO

Built 1991 Load: 33.7 t ADT: 57

Namaqua Avenue

Good

Over: Big Thompson River

0.5 Mi N of W 1st St., Larimer, CO

Built 2019 Load: 33.7 t ADT: 5,082

CR 904/CR 13

Good

Over: Little Thompson River

0.2 Mi N of Co Rd 6C, Larimer, CO

Built 1988 Load: 33.7 t ADT: 3,225

Jasper Lake Road

Good

Over: Big Thompson River

0.1 Mi N of US Hwy 34, Larimer, CO

Built 2014 Load: 34.0 t ADT: 25

County Road 29

Good

Over: Dry Creek

100 Ft N of Co Rd 18E, Larimer, CO

Built 1986 Load: 34.1 t ADT: 3,219

I 25 ML SBND

Good

Over: BNSF RR

0.5 MI N OF JCT SH 14, Larimer, CO

Built 1966 Load: 34.3 t ADT: 19,000

US 34 ML EBND

Good

Over: LOVELAND-GREELEY CANAL

1.2 MI E OF JCT US 287, Larimer, CO

Built 1965 Load: 34.7 t ADT: 22,000

LaPorte Avenue

Good

Over: Larimer Co. Canal No. 2

Junction with Frey Avenue, Larimer, CO

Built 1989 Load: 34.7 t ADT: 4,980

Ronald Reagan Ave.

Good

Over: Boxelder Creek

West of 3rd Street, Larimer, CO

Built 2005 Load: 34.7 t ADT: 744

High Plains Road

Good

Over: Greeley Loveland Canal

0.1 Mi N of US Hwy 34, Larimer, CO

Built 1986 Load: 34.8 t ADT: 212

Strauss Cabin Road

Good

Over: Fossil Creek Res. Inlet

0.4 Mi S of Harmony Road, Larimer, CO

Built 2005 Load: 35.1 t ADT: 2,164

County Road 27

Good

Over: Buckhorn Creek

0.8 Mi NW of Co Rd 38E, Larimer, CO

Built 1993 Load: 35.1 t ADT: 806

County Road 45B

Good

Over: Little Thompson River

1.0 mile east 36, Larimer, CO

Built 2015 Load: 35.3 t ADT: 122

US 34 ML WBND

Good

Over: LOVELAND-GREELEY CANAL

3 MI W OF JCT I 25, Larimer, CO

Built 1965 Load: 35.4 t ADT: 22,000

I 25 ML SBND

Good

Over: RR SPUR

2.9 MI S OF JCT SH 14, Larimer, CO

Built 2023 Load: 35.6 t ADT: 24,500

US 34 ML

Good

Over: BIG THOMPSON RIVER

_, Larimer, CO

Built 2018 Load: 35.6 t ADT: 4,900

I 25 ML

Good

Over: HILLSBORO TRIBUTARY

1.6 MI NO OF JCT SH 60, Larimer, CO

Built 2020 Load: 35.6 t ADT: 86,000

Horsetooth Road

Good

Over: Larimer Co Canal No. 2

50 ft W of College Ave, Larimer, CO

Built 2018 Load: 35.6 t ADT: 21,245

County Road 15

Good

Over: Little Thompson River

0.9 Mi N of Co Rd 4, Larimer, CO

Built 2018 Load: 35.6 t ADT: 1,452

County Road 18

Good

Over: Handy Ditch

0.4 Mi E of Co Rd 23E, Larimer, CO

Built 2017 Load: 35.6 t ADT: 1,397

County Rd 43

Good

Over: N. Fork Big Thompson

0.3 MI E of Horseshoe Rd, Larimer, CO

Built 2016 Load: 35.6 t ADT: 415

County Rd 43

Good

Over: N. Fork Big Thompson

1.3 MI E of Horseshoe Rd, Larimer, CO

Built 2016 Load: 35.6 t ADT: 415

Prospect Road

Good

Over: Cache La Poudre Overflow

0.7 Mi. E of Sharp Point, Larimer, CO

Built 2006 Load: 36.1 t ADT: 22,557

County Road 80C

Good

Over: Laramie River

0.3 Mi W of Co Rd 103, Larimer, CO

Built 1999 Load: 36.2 t ADT: 13

SPRAGUE LAKE ROAD

Good

Over: GLACIER CREEK

0.2 miles from Bear Lake, Larimer, CO

Built 2004 Load: 36.3 t ADT: 500

County Road 54

Good

Over: Box Elder Creek

0.5 Mi East of I-25, Larimer, CO

Built 1993 Load: 36.3 t ADT: 98

Piney River Drive

Good

Over: Greeley Loveland Canal

0.1 Mi N of McWhinney Blv, Larimer, CO

Built 2000 Load: 36.5 t ADT: 1,319

Co Rd 20(W 1st St)

Good

Over: Big Thompson River

0.5 Mi E of Taft Avenue, Larimer, CO

Built 2001 Load: 36.8 t ADT: 4,384

County Road 23

Good

Over: Dry Creek

0.6 Mi N of Co Rd 6, Larimer, CO

Built 1988 Load: 37.7 t ADT: 2,798

7th Street(CR 20D)

Good

Over: Greeley Loveland Canal

0.1 M W. Mad. Ave. -CR 13, Larimer, CO

Built 1986 Load: 37.8 t ADT: 2,645

County Road 56

Good

Over: Box Elder Creek

1.0 Mi. East of I-25, Larimer, CO

Built 1997 Load: 38.0 t ADT: 221

I 25 ML SBND

Good

Over: BIG THOMPSON RIVER

0.7 MI SO OF JCT US 34, Larimer, CO

Built 2022 Load: 38.9 t ADT: 34,000

I 25 ML NBND

Good

Over: BIG THOMPSON RIVER

1.3 MI N OF JCT SH 402, Larimer, CO

Built 2021 Load: 38.9 t ADT: 34,000

I 25 SERVICE RD

Good

Over: BIG THOMPSON RIVER SR

1.3 MI N OF JCT SH 402, Larimer, CO

Built 2020 Load: 38.9 t ADT: 3,911

County Rd 25E

Good

Over: Redstone Creek

0.4 MI N of Swanson R. Rd, Larimer, CO

Built 2017 Load: 38.9 t ADT: 138

County Rd 25E

Good

Over: Redstone Creek

0.5 MI S of Lazuli Rd, Larimer, CO

Built 2017 Load: 38.9 t ADT: 99

County Rd 25E

Good

Over: Redstone Creek

0.2 MI N of Lazuli Rd, Larimer, CO

Built 2017 Load: 38.9 t ADT: 99

County Rd 25E

Good

Over: Redstone Creek

Lazuli Rd, Larimer, CO

Built 2017 Load: 38.9 t ADT: 68

County Rd 25E

Good

Over: Redstone Creek

0.2 MI N of Lazuli Rd, Larimer, CO

Built 2017 Load: 38.9 t ADT: 44

County Rd 25E

Good

Over: Redstone Creek

0.9 MI N of Lazuli Rd, Larimer, CO

Built 2017 Load: 38.9 t ADT: 18

County Rd 25E

Good

Over: Redstone Creek

1.5 MI N of Lazuli Rd, Larimer, CO

Built 2017 Load: 38.9 t ADT: 14

County Rd 43

Good

Over: N. Fork Big Thompson

2.0 MI E of Horseshoe Rd, Larimer, CO

Built 2016 Load: 38.9 t ADT: 585

Waltonia Road

Good

Over: Big Thompson River

20 ft S of US 34, Larimer, CO

Built 2018 Load: 38.9 t ADT: 107

I 25 ML SBND

Good

Over: COUNTY ROAD 16

1.1 MI SO OF JCT SH 402, Larimer, CO

Built 2023 Load: 39.2 t ADT: 86,000

County Road 9E

Good

Over: Big Thompson River

0.4 Mi N of St Hwy 402, Larimer, CO

Built 1988 Load: 39.3 t ADT: 5,310

County Road 17

Good

Over: Home Supply Ditch

1.3 Mi W of Campion, Larimer, CO

Built 2005 Load: 39.3 t ADT: 21,143

West First Street

Good

Over: Greeley Loveland Canal

180 W First Street, Larimer, CO

Built 2023 Load: 39.5 t ADT: 9,792

County Road 25E

Good

Over: Redstone Creek

3.9 Mi N of Co Rd 24H, Larimer, CO

Built 1990 Load: 39.6 t ADT: 788

West 8th Street

Good

Over: Big Barnes Ditch

0.3 Mi W of Taft Avenue, Larimer, CO

Built 2020 Load: 39.9 t ADT: 3,983

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial