US Bridges

County Road 770 over Field Drain

Good

Dawson County, Nebraska · 1.5S 2W Eddyville · Structure no. C002421010

Built
1989
36 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete
Length
20 ft
2 main spans
Daily traffic
20
2003 count
Owner
County
County Highway Agency

About this bridge

County Road 770 over Field Drain is a concrete culvert carrying County Road 770 over Field Drain in Dawson County, Nebraska. It was built in 1989, so it is 36 years old, younger than the Nebraska average of 47.1 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 20 vehicles a day, projected to reach 34 by 2033. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 62.1 mi (100 km).

Location

Open in Google Maps
CarriesCounty Road 770
CrossesField Drain
Location1.5S 2W Eddyville
RouteCounty Highway 210
CountyDawson County
StateNebraska
Coordinates40.99, -99.66
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating36.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2003)
Projected traffic34 by 2033
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 County Road 770 over Field Drain built?

It was built in 1989, making it 36 years old in 2025.

What condition is County Road 770 over Field Drain 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 November 2023.

How much traffic does County Road 770 over Field Drain carry?

About 20 vehicles per day (2003 count).

How long is County Road 770 over Field Drain?

The structure is 20 ft (6.1 m) long with a longest span of 10 ft (3 m).

Who owns County Road 770 over Field Drain?

It is owned by the County Highway Agency.