US Bridges

Coll 7424 over Ainsworth Irrig Canal

Good

Brown County, Nebraska · 2E .2S of Johnstown · Structure no. C000902105

Built
1963
62 years old, rebuilt 2019
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
59 ft
2 main spans
Daily traffic
185
1998 count
Owner
County
County Highway Agency

About this bridge

Coll 7424 over Ainsworth Irrig Canal is a concrete stringer/multi-beam or girder carrying Coll 7424 over Ainsworth Irrig Canal in Brown County, Nebraska. It was built in 1963 and reconstructed in 2019, so it is 62 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 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 185 vehicles a day, projected to reach 314 by 2033. The structure is 59 ft (18 m) long and 26 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesColl 7424
CrossesAinsworth Irrig Canal
Location2E .2S of Johnstown
RouteCounty Highway 7424
CountyBrown County
StateNebraska
Coordinates42.5642, -100.0084
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating38.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHL 93
Structure length59 ft (18 m)
Longest span30 ft (9 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic185 (1998)
Projected traffic314 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

OwnerCounty Highway Agency
Maintained byCounty Highway 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 Coll 7424 over Ainsworth Irrig Canal built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2019.

What condition is Coll 7424 over Ainsworth Irrig 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 2024.

How much traffic does Coll 7424 over Ainsworth Irrig Canal carry?

About 185 vehicles per day (1998 count).

How long is Coll 7424 over Ainsworth Irrig Canal?

The structure is 59 ft (18 m) long with a longest span of 30 ft (9 m) and a deck 26 ft wide.

Who owns Coll 7424 over Ainsworth Irrig Canal?

It is owned by the County Highway Agency.