US Bridges

County Road 31 over Wildhorse Creek

Good

Phillips County, Colorado · 0.1 MI No. of Co. Rd. 34 · Structure no. PH31-0.1-34-A

Built
1987
38 years old
Condition
Good
inspected November 2023
Type
Arch - Deck
Aluminum, Wrought Iron, or Cast Iron
Length
51 ft
3 main spans
Daily traffic
35
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 31 over Wildhorse Creek is a aluminum, wrought iron, or cast iron arch - deck carrying County Road 31 over Wildhorse Creek in Phillips County, Colorado. It was built in 1987, so it is 38 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 35 vehicles a day, roughly 45% of them trucks, projected to reach 42 by 2042. The structure is 51 ft (15.5 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Road 31
CrossesWildhorse Creek
Location0.1 MI No. of Co. Rd. 34
RouteCounty Highway 0
Coordinates40.67467, -102.37717
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
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.4 US tons
Inventory rating34.3 US tons

Structure

Structure typeArch - Deck
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans3
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span15 ft (4.6 m)
Deck width36 ft (10.9 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2023)
Projected traffic42 by 2042
Trucks45%
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 31 over Wildhorse Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is County Road 31 over Wildhorse 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 November 2023.

How much traffic does County Road 31 over Wildhorse Creek carry?

About 35 vehicles per day (2023 count), of which roughly 45% are trucks.

How long is County Road 31 over Wildhorse Creek?

The structure is 51 ft (15.5 m) long with a longest span of 15 ft (4.6 m) and a deck 36 ft wide.

Who owns County Road 31 over Wildhorse Creek?

It is owned by the County Highway Agency.