US Bridges

County Road 7.4 over Pawnee Creek

Fair

Logan County, Colorado · 2.8 MI N of CO RD 34 · Structure no. LOG7.4-36.8-1

Built
1964
61 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Concrete
Length
70 ft
3 main spans
Daily traffic
21
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 7.4 over Pawnee Creek is a concrete tee beam carrying County Road 7.4 over Pawnee Creek in Logan County, Colorado. It was built in 1964, so it is 61 years old, older 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 21 vehicles a day, roughly 53% of them trucks, projected to reach 26 by 2042. The structure is 70 ft (21.3 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCounty Road 7.4
CrossesPawnee Creek
Location2.8 MI N of CO RD 34
RouteCounty Highway 0
CountyLogan County
StateColorado
Coordinates40.69797, -103.5188
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.5 US tons
Inventory rating51.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span21 ft (6.4 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2023)
Projected traffic26 by 2042
Trucks53%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 7.4 over Pawnee Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is County Road 7.4 over Pawnee 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 January 2024.

How much traffic does County Road 7.4 over Pawnee Creek carry?

About 21 vehicles per day (2023 count), of which roughly 53% are trucks.

How long is County Road 7.4 over Pawnee Creek?

The structure is 70 ft (21.3 m) long with a longest span of 21 ft (6.4 m) and a deck 28 ft wide.

Who owns County Road 7.4 over Pawnee Creek?

It is owned by the County Highway Agency.