US Bridges

Coll 7645 over Elkhorn River

Fair

Antelope County, Nebraska · 1.5E of Oakdale · Structure no. C000233910

Built
1957
68 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
264 ft
3 main spans
Daily traffic
70
1998 count
Owner
County
County Highway Agency

About this bridge

Coll 7645 over Elkhorn River is a steel continuous stringer/multi-beam or girder carrying Coll 7645 over Elkhorn River in Antelope County, Nebraska. It was built in 1957, so it is 68 years old, older than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 70 vehicles a day, projected to reach 119 by 2042. The structure is 264 ft (80.5 m) long and 22 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

Location

Open in Google Maps
CarriesColl 7645
CrossesElkhorn River
Location1.5E of Oakdale
RouteCounty Highway 7645
CountyAntelope County
StateNebraska
Coordinates42.0692, -97.9332
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating37.5 US tons
Inventory rating22 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadUnknown
Structure length264 ft (80.5 m)
Longest span90 ft (27.4 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (1998)
Projected traffic119 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.1 mi (100 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 Coll 7645 over Elkhorn River built?

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

What condition is Coll 7645 over Elkhorn River 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 February 2024.

How much traffic does Coll 7645 over Elkhorn River carry?

About 70 vehicles per day (1998 count).

How long is Coll 7645 over Elkhorn River?

The structure is 264 ft (80.5 m) long with a longest span of 90 ft (27.4 m) and a deck 22 ft wide.

Who owns Coll 7645 over Elkhorn River?

It is owned by the County Highway Agency.