US Bridges

FM over Boone River

Fair

Wright County, Iowa · 093261002 · Structure no. 000000000359141

Built
1980
45 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
127 ft
3 main spans
Daily traffic
31
2021 count
Owner
County
County Highway Agency

About this bridge

FM over Boone River is a concrete continuous slab carrying FM over Boone River in Wright County, Iowa. It was built in 1980, so it is 45 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 31 vehicles a day, projected to reach 31 by 2043. The structure is 127 ft (38.7 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFM
CrossesBoone River
Location093261002
RouteCounty Highway 0
CountyWright County
StateIowa
Coordinates42.889, -93.9116
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating41 US tons
Inventory rating24.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length127 ft (38.7 m)
Longest span49 ft (14.9 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31 (2021)
Projected traffic31 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Boone River built?

It was built in 1980, making it 45 years old in 2025.

What condition is FM over Boone 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 March 2023.

How much traffic does FM over Boone River carry?

About 31 vehicles per day (2021 count).

How long is FM over Boone River?

The structure is 127 ft (38.7 m) long with a longest span of 49 ft (14.9 m) and a deck 26 ft wide.

Who owns FM over Boone River?

It is owned by the County Highway Agency.