US Bridges

SH 71 Ml over Duck Creek

Good

Crowley County, Colorado · 9.0 MI N of JCT SH 96 E · Structure no. K-22-C

Built
1969
56 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
77 ft
1 main span
Daily traffic
570
2020 count
Owner
State
State Highway Agency

About this bridge

SH 71 Ml over Duck Creek is a prestressed concrete stringer/multi-beam or girder carrying SH 71 Ml over Duck Creek in Crowley County, Colorado. It was built in 1969, so it is 56 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 570 vehicles a day, roughly 23% of them trucks, projected to reach 758 by 2040. The structure is 77 ft (23.5 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesSH 71 Ml
CrossesDuck Creek
Location9.0 MI N of JCT SH 96 E
RouteState Highway 71C
Coordinates38.34252, -103.73159
Functional classRural Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating30.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span75 ft (23 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic570 (2020)
Projected traffic758 by 2040
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

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 Duck Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is SH 71 Ml over Duck 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 January 2024.

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

About 570 vehicles per day (2020 count), of which roughly 23% are trucks.

How long is SH 71 Ml over Duck Creek?

The structure is 77 ft (23.5 m) long with a longest span of 75 ft (23 m) and a deck 34 ft wide.

Who owns SH 71 Ml over Duck Creek?

It is owned by the State Highway Agency.