US Bridges

County Road 20 over Dry Creek

Good

Larimer County, Colorado · 0.5 MI E of CO RD 29 · Structure no. LR20-0.5-29-A

Built
1986
39 years old
Condition
Good
inspected May 2023
Type
Tee Beam
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
2,113
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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,113 vehicles a day, roughly 22% of them trucks, projected to reach 2,641 by 2043. The structure is 66 ft (20 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCounty Road 20
CrossesDry Creek
Location0.5 MI E of CO RD 29
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.38719, -105.18386
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67 US tons
Inventory rating34.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length66 ft (20 m)
Longest span59 ft (18.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,113 (2023)
Projected traffic2,641 by 2043
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does County Road 20 over Dry Creek carry?

About 2,113 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is County Road 20 over Dry Creek?

The structure is 66 ft (20 m) long with a longest span of 59 ft (18.1 m) and a deck 35 ft wide.

Who owns County Road 20 over Dry Creek?

It is owned by the County Highway Agency.