US Bridges

Road 408 over Thirtymile Canal

Good

Dawson County, Nebraska · 4S US30 Lincoln Cl · Structure no. C002420110

Built
2014
11 years old
Condition
Good
inspected October 2022
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
30
2003 count
Owner
Local
Other Local Agency

About this bridge

Road 408 over Thirtymile Canal is a concrete culvert carrying Road 408 over Thirtymile Canal in Dawson County, Nebraska. It was built in 2014, so it is 11 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 30 vehicles a day, projected to reach 42 by 2033. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesRoad 408
CrossesThirtymile Canal
Location4S US30 Lincoln Cl
RouteCounty Highway 201
CountyDawson County
StateNebraska
Coordinates40.8884, -100.2245
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.
Culvert8 Very GoodNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.3 US tons
Inventory rating36.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length22 ft (6.7 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 traffic30 (2003)
Projected traffic42 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road 408 over Thirtymile Canal built?

It was built in 2014, making it 11 years old in 2025.

What condition is Road 408 over Thirtymile Canal 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 October 2022.

How much traffic does Road 408 over Thirtymile Canal carry?

About 30 vehicles per day (2003 count).

How long is Road 408 over Thirtymile Canal?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns Road 408 over Thirtymile Canal?

It is owned by the Other Local Agency.