US Bridges

IRR FM over Branch of Richland Creek

Poor

Tama County, Iowa · 082153303 · Structure no. 000000000317170

Built
1967
58 years old
Condition
Poor
inspected October 2024
Type
Slab
Concrete Continuous
Length
78 ft
3 main spans
Daily traffic
304
2022 count
Owner
County
County Highway Agency

About this bridge

IRR FM over Branch of Richland Creek is a concrete continuous slab carrying IRR FM over Branch of Richland Creek in Tama County, Iowa. It was built in 1967, so it is 58 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 4 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.

It carries about 304 vehicles a day, roughly 18% of them trucks, projected to reach 304 by 2044. The structure is 78 ft (23.8 m) long and 30 ft wide. If it were closed, the detour would be 28 mi (45 km).

CarriesIRR FM
CrossesBranch of Richland Creek
Location082153303
RouteCounty Highway 0
StateIowa
Coordinates41.87677, -92.59749
Functional classRural Major Collector

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50.9 US tons
Inventory rating29.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length78 ft (23.8 m)
Longest span30 ft (9.1 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic304 (2022)
Projected traffic304 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 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 FM over Branch of Richland Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is IRR FM over Branch of Richland Creek 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 October 2024.

How much traffic does IRR FM over Branch of Richland Creek carry?

About 304 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is IRR FM over Branch of Richland Creek?

The structure is 78 ft (23.8 m) long with a longest span of 30 ft (9.1 m) and a deck 30 ft wide.

Who owns IRR FM over Branch of Richland Creek?

It is owned by the County Highway Agency.