US Bridges

County Road 25 over South Platte River

Good

Logan County, Colorado · 0.6 MI S of US HWY 6 · Structure no. LOG25-6.8-37-A

Built
1996
29 years old
Condition
Good
inspected January 2024
Type
Tee Beam
Prestressed Concrete
Length
615 ft
6 main spans
Daily traffic
172
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 25 over South Platte River is a prestressed concrete tee beam carrying County Road 25 over South Platte River in Logan County, Colorado. It was built in 1996, so it is 29 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 172 vehicles a day, roughly 36% of them trucks, projected to reach 212 by 2042. The structure is 615 ft (187.4 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCounty Road 25
CrossesSouth Platte River
Location0.6 MI S of US HWY 6
RouteCounty Highway 0
Coordinates40.47403, -103.34675
Functional classRural Minor 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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.5 US tons
Inventory rating43.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans6
Design loadHS 20
Structure length615 ft (187.4 m)
Longest span103 ft (31.5 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic172 (2023)
Projected traffic212 by 2042
Trucks36%
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 25 over South Platte River built?

It was built in 1996, making it 29 years old in 2025.

What condition is County Road 25 over South Platte River 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 County Road 25 over South Platte River carry?

About 172 vehicles per day (2023 count), of which roughly 36% are trucks.

How long is County Road 25 over South Platte River?

The structure is 615 ft (187.4 m) long with a longest span of 103 ft (31.5 m) and a deck 36 ft wide.

Who owns County Road 25 over South Platte River?

It is owned by the County Highway Agency.