US Bridges

South Lemay Avenue over Fossil Creek Tributary

Fair

Larimer County, Colorado · 0.2 MI N of Trilby Road · Structure no. FCLMY-0.2-TRILB

Built
1986
39 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
64 ft
7 main spans
Daily traffic
12,185
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

South Lemay Avenue over Fossil Creek Tributary is a concrete culvert carrying South Lemay Avenue over Fossil Creek Tributary in Larimer County, Colorado. It was built in 1986, so it is 39 years old, younger 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 12,185 vehicles a day, roughly 12% of them trucks, projected to reach 15,231 by 2042. The structure is 64 ft (19.4 m) long and 90 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesSouth Lemay Avenue
CrossesFossil Creek Tributary
Location0.2 MI N of Trilby Road
RouteCity Street 0
CountyLarimer County
StateColorado
Coordinates40.4978, -105.05831
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans7
Design loadHS 20
Structure length64 ft (19.4 m)
Longest span12 ft (3.7 m)
Deck width90 ft (27.4 m)
Roadway width73 ft (22.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,185 (2023)
Projected traffic15,231 by 2042
Trucks12%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 South Lemay Avenue over Fossil Creek Tributary built?

It was built in 1986, making it 39 years old in 2025.

What condition is South Lemay Avenue over Fossil Creek Tributary 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 June 2023.

How much traffic does South Lemay Avenue over Fossil Creek Tributary carry?

About 12,185 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is South Lemay Avenue over Fossil Creek Tributary?

The structure is 64 ft (19.4 m) long with a longest span of 12 ft (3.7 m) and a deck 90 ft wide.

Who owns South Lemay Avenue over Fossil Creek Tributary?

It is owned by the City or Municipal Highway Agency.