US Bridges

FM over Middle Platte River

Good

Union County, Iowa · 072311302 · Structure no. 000000000326101

Built
2005
20 years old
Condition
Good
inspected October 2022
Type
Slab
Concrete Continuous
Length
129 ft
3 main spans
Daily traffic
1,055
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Middle Platte River is a concrete continuous slab carrying FM over Middle Platte River in Union County, Iowa. It was built in 2005, so it is 20 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,055 vehicles a day, roughly 9% of them trucks, projected to reach 1,055 by 2043. The structure is 129 ft (39.3 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFM
CrossesMiddle Platte River
Location072311302
RouteCounty Highway 0
StateIowa
Coordinates41.03176, -94.37584
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.6 US tons
Inventory rating58.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length129 ft (39.3 m)
Longest span49 ft (14.9 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,055 (2022)
Projected traffic1,055 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Platte River built?

It was built in 2005, making it 20 years old in 2025.

What condition is FM over Middle Platte River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2022.

How much traffic does FM over Middle Platte River carry?

About 1,055 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is FM over Middle Platte River?

The structure is 129 ft (39.3 m) long with a longest span of 49 ft (14.9 m) and a deck 33 ft wide.

Who owns FM over Middle Platte River?

It is owned by the County Highway Agency.