US Bridges

County Road 770 over Field Drain

Good

Dawson County, Nebraska · 1S 1.2W of Eddyville · Structure no. C002421015

Built
1986
39 years old
Condition
Good
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
81 ft
3 main spans
Daily traffic
25
2003 count
Owner
County
County Highway Agency

About this bridge

County Road 770 over Field Drain is a prestressed concrete tee beam carrying County Road 770 over Field Drain in Dawson County, Nebraska. It was built in 1986, so it is 39 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25 vehicles a day, projected to reach 42 by 2033. The structure is 81 ft (24.7 m) long and 30 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

CarriesCounty Road 770
CrossesField Drain
Location1S 1.2W of Eddyville
RouteCounty Highway 210
Coordinates40.9883, -99.6467
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
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.3 US tons
Inventory rating40.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length81 ft (24.7 m)
Longest span27 ft (8.2 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2003)
Projected traffic42 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 1986, making it 39 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 25 vehicles per day (2003 count).

How long is County Road 770 over Field Drain?

The structure is 81 ft (24.7 m) long with a longest span of 27 ft (8.2 m) and a deck 30 ft wide.

Who owns County Road 770 over Field Drain?

It is owned by the County Highway Agency.