US Bridges

Local over Grand River

Good

Adair County, Iowa · 075300801 · Structure no. 000000000055600

Built
1958
67 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
69 ft
1 main span
Daily traffic
30
2021 count
Owner
County
County Highway Agency

About this bridge

Local over Grand River is a prestressed concrete stringer/multi-beam or girder carrying Local over Grand River in Adair County, Iowa. It was built in 1958, so it is 67 years old, older than the Iowa average of 45.5 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 30 vehicles a day, roughly 17% of them trucks, projected to reach 30 by 2044. The structure is 69 ft (21 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesLocal
CrossesGrand River
Location075300801
RouteCounty Highway 0
StateIowa
Coordinates41.31621, -94.33076
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.6 US tons
Inventory rating27.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length69 ft (21 m)
Longest span67 ft (20.4 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2021)
Projected traffic30 by 2044
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Local over Grand River built?

It was built in 1958, making it 67 years old in 2025.

What condition is Local over Grand River 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 May 2024.

How much traffic does Local over Grand River carry?

About 30 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is Local over Grand River?

The structure is 69 ft (21 m) long with a longest span of 67 ft (20.4 m) and a deck 22 ft wide.

Who owns Local over Grand River?

It is owned by the County Highway Agency.