US Bridges

Irr-Local over Iowa River

PoorClosed to traffic

Tama County, Iowa · 083162204 · Structure no. 000000000318400

Built
1938
87 years old
Condition
Poor
inspected December 2014
Type
Truss - Thru
Steel
Length
331 ft
1 main span
Daily traffic
216
2022 count
Owner
County
County Highway Agency

About this bridge

Irr-Local over Iowa River is a steel truss - thru carrying Irr-Local over Iowa River in Tama County, Iowa. It was built in 1938, so it is 87 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 0 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 216 vehicles a day, projected to reach 216 by 2043. The structure is 331 ft (100.9 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesIrr-Local
CrossesIowa River
Location083162204
RouteCounty Highway 0
CountyTama County
StateIowa
Coordinates41.98639, -92.70079
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck0 FailedOut of service and beyond corrective action.
Superstructure0 FailedOut of service and beyond corrective action.
Substructure0 FailedOut of service and beyond corrective action.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2014
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; scour above top of footing
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry0: Immediate repair necessary to put back in service
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadH 15
Structure length331 ft (100.9 m)
Longest span160 ft (48.8 m)
Deck width20 ft (6 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deck11 ft (3.4 m)

Traffic and service

Average daily traffic216 (2022)
Projected traffic216 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Irr-Local over Iowa River built?

It was built in 1938, making it 87 years old in 2025.

What condition is Irr-Local over Iowa River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2014.

How much traffic does Irr-Local over Iowa River carry?

About 216 vehicles per day (2022 count).

How long is Irr-Local over Iowa River?

The structure is 331 ft (100.9 m) long with a longest span of 160 ft (48.8 m) and a deck 20 ft wide.

Who owns Irr-Local over Iowa River?

It is owned by the County Highway Agency.