US Bridges

FM over Branch of Iowa River

Fair

Grundy County, Iowa · 088183102 · Structure no. 000000000165451

Built
1987
38 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
79
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Branch of Iowa River is a concrete continuous culvert carrying FM over Branch of Iowa River in Grundy County, Iowa. It was built in 1987, so it is 38 years old, younger 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 6 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 79 vehicles a day, projected to reach 79 by 2044. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFM
CrossesBranch of Iowa River
Location088183102
RouteCounty Highway 0
CountyGrundy County
StateIowa
Coordinates42.39308, -93.00246
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79 (2022)
Projected traffic79 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Branch of Iowa River built?

It was built in 1987, making it 38 years old in 2025.

What condition is FM over Branch of Iowa 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 April 2024.

How much traffic does FM over Branch of Iowa River carry?

About 79 vehicles per day (2022 count).

How long is FM over Branch of Iowa River?

The structure is 24 ft (7.3 m) long with a longest span of 13 ft (4 m).

Who owns FM over Branch of Iowa River?

It is owned by the County Highway Agency.