US Bridges

Coll 7430 over Mirdan Canal

Fair

Garfield County, Nebraska · 1N 3W Burwell · Structure no. C003604205

Built
1984
41 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
57 ft
1 main span
Daily traffic
50
1998 count
Owner
County
County Highway Agency

About this bridge

Coll 7430 over Mirdan Canal is a prestressed concrete stringer/multi-beam or girder carrying Coll 7430 over Mirdan Canal in Garfield County, Nebraska. It was built in 1984, so it is 41 years old, younger than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 50 vehicles a day, projected to reach 85 by 2033. The structure is 57 ft (17.4 m) long and 31 ft wide. If it were closed, the detour would be 87 mi (140 km).

Location

Open in Google Maps
CarriesColl 7430
CrossesMirdan Canal
Location1N 3W Burwell
RouteCounty Highway 7430
CountyGarfield County
StateNebraska
Coordinates41.7984, -99.1916
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating29.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span55 ft (16.8 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (1998)
Projected traffic85 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed87 mi (140 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 Coll 7430 over Mirdan Canal built?

It was built in 1984, making it 41 years old in 2025.

What condition is Coll 7430 over Mirdan Canal in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.

How much traffic does Coll 7430 over Mirdan Canal carry?

About 50 vehicles per day (1998 count).

How long is Coll 7430 over Mirdan Canal?

The structure is 57 ft (17.4 m) long with a longest span of 55 ft (16.8 m) and a deck 31 ft wide.

Who owns Coll 7430 over Mirdan Canal?

It is owned by the County Highway Agency.