US Bridges

FAS 1780 over Mirdan Canal

Good

Valley County, Nebraska · 3S 4.5W Ord · Structure no. C008812603

Built
1985
40 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
125 ft
2 main spans
Daily traffic
310
2011 count
Owner
County
County Highway Agency

About this bridge

FAS 1780 over Mirdan Canal is a prestressed concrete stringer/multi-beam or girder carrying FAS 1780 over Mirdan Canal in Valley County, Nebraska. It was built in 1985, so it is 40 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 310 vehicles a day, projected to reach 310 by 2033. The structure is 125 ft (38.1 m) long and 31 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

Open in Google Maps
CarriesFAS 1780
CrossesMirdan Canal
Location3S 4.5W Ord
RouteCounty Highway 1780
CountyValley County
StateNebraska
Coordinates41.5678, -99.0392
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating44.1 US tons
Inventory rating22 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length125 ft (38.1 m)
Longest span63 ft (19.2 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2011)
Projected traffic310 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 1780 over Mirdan Canal built?

It was built in 1985, making it 40 years old in 2025.

What condition is FAS 1780 over Mirdan 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 FAS 1780 over Mirdan Canal carry?

About 310 vehicles per day (2011 count).

How long is FAS 1780 over Mirdan Canal?

The structure is 125 ft (38.1 m) long with a longest span of 63 ft (19.2 m) and a deck 31 ft wide.

Who owns FAS 1780 over Mirdan Canal?

It is owned by the County Highway Agency.