US Bridges

FM over Harter CR

FairPosted for load

Buchanan County, Iowa · 089092702 · Structure no. 000000000082990

Built
1963
62 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
75 ft
3 main spans
Daily traffic
1,169
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Harter CR is a concrete continuous slab carrying FM over Harter CR in Buchanan County, Iowa. It was built in 1963, so it is 62 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for other load-capacity restriction.

It carries about 1,169 vehicles a day, roughly 2% of them trucks, projected to reach 1,169 by 2044. The structure is 75 ft (22.9 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFM
CrossesHarter CR
Location089092702
RouteCounty Highway 0
CountyBuchanan County
StateIowa
Coordinates42.48543, -91.89965
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.6 US tons
Inventory rating24.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length75 ft (22.9 m)
Longest span29 ft (8.8 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,169 (2022)
Projected traffic1,169 by 2044
Trucks2%
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 FM over Harter CR built?

It was built in 1963, making it 62 years old in 2025.

What condition is FM over Harter CR 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 January 2024.

How much traffic does FM over Harter CR carry?

About 1,169 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is FM over Harter CR?

The structure is 75 ft (22.9 m) long with a longest span of 29 ft (8.8 m) and a deck 25 ft wide.

Who owns FM over Harter CR?

It is owned by the County Highway Agency.