US Bridges

Local RD over Middle River

Fair

Adair County, Iowa · 076302001 · Structure no. 000000000056545

Built
1979
46 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
133 ft
3 main spans
Daily traffic
31
2023 count
Owner
County
County Highway Agency

About this bridge

Local RD over Middle River is a steel stringer/multi-beam or girder carrying Local RD over Middle River in Adair County, Iowa. It was built in 1979, so it is 46 years old, older than the Iowa average of 45.5 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 31 vehicles a day, projected to reach 31 by 2043. The structure is 133 ft (40.5 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLocal RD
CrossesMiddle River
Location076302001
RouteCounty Highway 0
CountyAdair County
StateIowa
Coordinates41.37377, -94.32351
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans3
Design loadUnknown
Structure length133 ft (40.5 m)
Longest span50 ft (15.2 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31 (2023)
Projected traffic31 by 2043
Trucks0%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local RD over Middle River built?

It was built in 1979, making it 46 years old in 2025.

What condition is Local RD over Middle River 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 May 2024.

How much traffic does Local RD over Middle River carry?

About 31 vehicles per day (2023 count).

How long is Local RD over Middle River?

The structure is 133 ft (40.5 m) long with a longest span of 50 ft (15.2 m) and a deck 20 ft wide.

Who owns Local RD over Middle River?

It is owned by the County Highway Agency.