US Bridges

County Road 20 over Tri-State Canal

Good

Scotts Bluff County, Nebraska · 5.5E of Mitchell · Structure no. C007913920

Built
1977
48 years old
Condition
Good
inspected November 2023
Type
Channel Beam
Concrete
Length
86 ft
3 main spans
Daily traffic
50
2003 count
Owner
County
County Highway Agency

About this bridge

County Road 20 over Tri-State Canal is a concrete channel beam carrying County Road 20 over Tri-State Canal in Scotts Bluff County, Nebraska. It was built in 1977, so it is 48 years old, older 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 50 vehicles a day, projected to reach 85 by 2033. The structure is 86 ft (26.2 m) long and 30 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

Open in Google Maps
CarriesCounty Road 20
CrossesTri-State Canal
Location5.5E of Mitchell
RouteCounty Highway 139
CountyScotts Bluff County
StateNebraska
Coordinates41.9333, -103.6967
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadUnknown
Structure length86 ft (26.2 m)
Longest span36 ft (11 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2003)
Projected traffic85 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 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 County Road 20 over Tri-State Canal built?

It was built in 1977, making it 48 years old in 2025.

What condition is County Road 20 over Tri-State 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 November 2023.

How much traffic does County Road 20 over Tri-State Canal carry?

About 50 vehicles per day (2003 count).

How long is County Road 20 over Tri-State Canal?

The structure is 86 ft (26.2 m) long with a longest span of 36 ft (11 m) and a deck 30 ft wide.

Who owns County Road 20 over Tri-State Canal?

It is owned by the County Highway Agency.