US Bridges

County Road 27 over Buckhorn Creek

Fair

Larimer County, Colorado · 2.1 MI NW of Mason ST · Structure no. LR27-2.1-38E

Built
1967
58 years old, rebuilt 1980
Condition
Fair
inspected May 2023
Type
Tee Beam
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
770
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 27 over Buckhorn Creek is a prestressed concrete tee beam carrying County Road 27 over Buckhorn Creek in Larimer County, Colorado. It was built in 1967 and reconstructed in 1980, so it is 58 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 770 vehicles a day, roughly 23% of them trucks, projected to reach 963 by 2042. The structure is 44 ft (13.4 m) long and 30 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesCounty Road 27
CrossesBuckhorn Creek
Location2.1 MI NW of Mason ST
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.50631, -105.23264
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.9 US tons
Inventory rating38 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span40 ft (12.1 m)
Deck width30 ft (9 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic770 (2023)
Projected traffic963 by 2042
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 27 over Buckhorn Creek built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1980.

What condition is County Road 27 over Buckhorn Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does County Road 27 over Buckhorn Creek carry?

About 770 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is County Road 27 over Buckhorn Creek?

The structure is 44 ft (13.4 m) long with a longest span of 40 ft (12.1 m) and a deck 30 ft wide.

Who owns County Road 27 over Buckhorn Creek?

It is owned by the County Highway Agency.