US Bridges

Coll 7599 over Little Blue River

Poor

Thayer County, Nebraska · .5E 6.5S of Davenport · Structure no. C008500320

Built
1971
54 years old
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
208 ft
3 main spans
Daily traffic
100
1998 count
Owner
County
County Highway Agency

About this bridge

Coll 7599 over Little Blue River is a steel continuous stringer/multi-beam or girder carrying Coll 7599 over Little Blue River in Thayer County, Nebraska. It was built in 1971, so it is 54 years old, older than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 100 vehicles a day, projected to reach 100 by 2033. The structure is 208 ft (63.4 m) long and 23 ft wide. If it were closed, the detour would be 37.3 mi (60 km).

CarriesColl 7599
CrossesLittle Blue River
Location.5E 6.5S of Davenport
RouteCounty Highway 7599
Coordinates40.216, -97.8028
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating32 US tons

Structure

MaterialSteel Continuous
DeckOther
Main spans3
Design loadUnknown
Structure length208 ft (63.4 m)
Longest span78 ft (23.8 m)
Deck width23 ft (6.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (1998)
Projected traffic100 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.3 mi (60 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Coll 7599 over Little Blue River built?

It was built in 1971, making it 54 years old in 2025.

What condition is Coll 7599 over Little Blue River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.

How much traffic does Coll 7599 over Little Blue River carry?

About 100 vehicles per day (1998 count).

How long is Coll 7599 over Little Blue River?

The structure is 208 ft (63.4 m) long with a longest span of 78 ft (23.8 m) and a deck 23 ft wide.

Who owns Coll 7599 over Little Blue River?

It is owned by the County Highway Agency.