US Bridges

FM over Wolf Creek Branch

Poor

Grundy County, Iowa · 086170704 · Structure no. 000000000163452

Built
1972
53 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
373
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Wolf Creek Branch is a prestressed concrete stringer/multi-beam or girder carrying FM over Wolf Creek Branch in Grundy County, Iowa. It was built in 1972, so it is 53 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 373 vehicles a day, roughly 9% of them trucks, projected to reach 373 by 2044. The structure is 32 ft (9.8 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesFM
CrossesWolf Creek Branch
Location086170704
RouteCounty Highway 0
StateIowa
Coordinates42.26791, -92.87474
Functional classRural Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating90.2 US tons
Inventory rating66.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic373 (2022)
Projected traffic373 by 2044
Trucks9%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Wolf Creek Branch built?

It was built in 1972, making it 53 years old in 2025.

What condition is FM over Wolf Creek Branch 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 April 2024.

How much traffic does FM over Wolf Creek Branch carry?

About 373 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is FM over Wolf Creek Branch?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns FM over Wolf Creek Branch?

It is owned by the County Highway Agency.