US Bridges

County Road 18E over Dry Creek

Fair

Larimer County, Colorado · 1.8 MI E of CO RD 31 · Structure no. LR18E-1.8-31

Built
1984
41 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
68 ft
3 main spans
Daily traffic
2,621
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 18E over Dry Creek is a concrete culvert carrying County Road 18E over Dry Creek in Larimer County, Colorado. It was built in 1984, so it is 41 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 2,621 vehicles a day, roughly 26% of them trucks, projected to reach 3,276 by 2043. The structure is 68 ft (20.7 m) long and 37 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesCounty Road 18E
CrossesDry Creek
Location1.8 MI E of CO RD 31
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.38458, -105.19686
Functional classRural Major 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.5 US tons
Inventory rating29.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span25 ft (7.7 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,621 (2023)
Projected traffic3,276 by 2043
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 18E over Dry Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is County Road 18E over Dry 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 18E over Dry Creek carry?

About 2,621 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is County Road 18E over Dry Creek?

The structure is 68 ft (20.7 m) long with a longest span of 25 ft (7.7 m) and a deck 37 ft wide.

Who owns County Road 18E over Dry Creek?

It is owned by the County Highway Agency.