US Bridges

SH 71 Ml over Horsetail Creek

Good

Weld County, Colorado · 11.6 MI North of JCT SH 1 · Structure no. A-22-E

Built
1957
68 years old, rebuilt 2007
Condition
Good
inspected March 2025
Type
Culvert
Steel
Length
38 ft
2 main spans
Daily traffic
1,000
2020 count
Owner
State
State Highway Agency

About this bridge

SH 71 Ml over Horsetail Creek is a steel culvert carrying SH 71 Ml over Horsetail Creek in Weld County, Colorado. It was built in 1957 and reconstructed in 2007, so it is 68 years old, older 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 1,000 vehicles a day, roughly 42% of them trucks, projected to reach 1,640 by 2040. The structure is 38 ft (11.7 m) long and 114 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSH 71 Ml
CrossesHorsetail Creek
Location11.6 MI North of JCT SH 1
RouteState Highway 71F
Coordinates40.77423, -103.68815
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length38 ft (11.7 m)
Longest span18 ft (5.4 m)
Deck width114 ft (34.8 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2020)
Projected traffic1,640 by 2040
Trucks42%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SH 71 Ml over Horsetail Creek built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2007.

What condition is SH 71 Ml over Horsetail 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 March 2025.

How much traffic does SH 71 Ml over Horsetail Creek carry?

About 1,000 vehicles per day (2020 count), of which roughly 42% are trucks.

How long is SH 71 Ml over Horsetail Creek?

The structure is 38 ft (11.7 m) long with a longest span of 18 ft (5.4 m) and a deck 114 ft wide.

Who owns SH 71 Ml over Horsetail Creek?

It is owned by the State Highway Agency.