US Bridges

FM over Middle Timber Creek

Fair

Marshall County, Iowa · 083183302 · Structure no. 000000000242701

Built
1979
46 years old
Condition
Fair
inspected December 2024
Type
Slab
Concrete Continuous
Length
79 ft
3 main spans
Daily traffic
108
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Middle Timber Creek is a concrete continuous slab carrying FM over Middle Timber Creek in Marshall County, Iowa. It was built in 1979, so it is 46 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 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 108 vehicles a day, projected to reach 108 by 2044. The structure is 79 ft (24.1 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesFM
CrossesMiddle Timber Creek
Location083183302
RouteCounty Highway 0
StateIowa
Coordinates41.9638, -92.96044
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.8 US tons
Inventory rating36.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length79 ft (24.1 m)
Longest span29 ft (8.8 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic108 (2022)
Projected traffic108 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 Middle Timber Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is FM over Middle Timber Creek 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 December 2024.

How much traffic does FM over Middle Timber Creek carry?

About 108 vehicles per day (2022 count).

How long is FM over Middle Timber Creek?

The structure is 79 ft (24.1 m) long with a longest span of 29 ft (8.8 m) and a deck 32 ft wide.

Who owns FM over Middle Timber Creek?

It is owned by the County Highway Agency.