US Bridges

FM over Drainage Ditch

Poor

Floyd County, Iowa · 096181401 · Structure no. 000000000024920

Built
1919
106 years old, rebuilt 1949
Condition
Poor
inspected March 2024
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
1,159
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Drainage Ditch is a concrete slab carrying FM over Drainage Ditch in Floyd County, Iowa. It was built in 1919 and reconstructed in 1949, so it is 106 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 1,159 vehicles a day, roughly 11% of them trucks, projected to reach 1,159 by 2044. The structure is 27 ft (8.2 m) long and 47 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFM
CrossesDrainage Ditch
Location096181401
RouteCounty Highway 0
StateIowa
Coordinates43.14078, -92.92821
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 inspectionMarch 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 geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.3 US tons
Inventory rating22 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length27 ft (8.2 m)
Longest span24 ft (7.3 m)
Deck width47 ft (14.3 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,159 (2022)
Projected traffic1,159 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$404,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Drainage Ditch built?

It was built in 1919, making it 106 years old in 2025. It was reconstructed in 1949.

What condition is FM over Drainage Ditch 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 March 2024.

How much traffic does FM over Drainage Ditch carry?

About 1,159 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is FM over Drainage Ditch?

The structure is 27 ft (8.2 m) long with a longest span of 24 ft (7.3 m) and a deck 47 ft wide.

Who owns FM over Drainage Ditch?

It is owned by the County Highway Agency.