US Bridges

County Road 20 over Dry Creek

Fair

Larimer County, Colorado · 0.1 MI E of CO RD 23H · Structure no. LR20-0.1-23H-A

Built
1986
39 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Prestressed Concrete
Length
69 ft
1 main span
Daily traffic
3,063
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 20 over Dry Creek is a prestressed concrete tee beam carrying County Road 20 over Dry Creek 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 3,063 vehicles a day, roughly 19% of them trucks, projected to reach 3,828 by 2043. The structure is 69 ft (21.1 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 20
CrossesDry Creek
Location0.1 MI E of CO RD 23H
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.39303, -105.16583
Functional classUrban 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.2 US tons
Inventory rating48 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length69 ft (21.1 m)
Longest span63 ft (19.3 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,063 (2023)
Projected traffic3,828 by 2043
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 20 over Dry Creek built?

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

What condition is County Road 20 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 20 over Dry Creek carry?

About 3,063 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is County Road 20 over Dry Creek?

The structure is 69 ft (21.1 m) long with a longest span of 63 ft (19.3 m) and a deck 39 ft wide.

Who owns County Road 20 over Dry Creek?

It is owned by the County Highway Agency.