US Bridges

IRR Local over Iowa River Overflow

PoorClosed to traffic

Tama County, Iowa · 083161504 · Structure no. 000000000318375

Built
1947
78 years old
Condition
Poor
inspected September 2015
Type
Stringer/Multi-beam or Girder
Steel
Length
169 ft
4 main spans
Daily traffic
216
2022 count
Owner
County
County Highway Agency

About this bridge

IRR Local over Iowa River Overflow is a steel stringer/multi-beam or girder carrying IRR Local over Iowa River Overflow in Tama County, Iowa. It was built in 1947, so it is 78 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 169 ft (51.5 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIRR Local
CrossesIowa River Overflow
Location083161504
RouteCounty Highway 0
CountyTama County
StateIowa
Coordinates41.99404, -92.69853
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 protection0 FailedOut of service and beyond corrective action.
Last inspectionSeptember 2015
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry0: Immediate repair necessary to put back in service
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length169 ft (51.5 m)
Longest span42 ft (12.8 m)
Deck width19 ft (5.9 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

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 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 IRR Local over Iowa River Overflow built?

It was built in 1947, making it 78 years old in 2025.

What condition is IRR Local over Iowa River Overflow 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 September 2015.

How much traffic does IRR Local over Iowa River Overflow carry?

About 216 vehicles per day (2022 count).

How long is IRR Local over Iowa River Overflow?

The structure is 169 ft (51.5 m) long with a longest span of 42 ft (12.8 m) and a deck 19 ft wide.

Who owns IRR Local over Iowa River Overflow?

It is owned by the County Highway Agency.