US Bridges

110th ST over Middle River

Good

Adair County, Iowa · 3.1 MI E of N54 on 110th · Structure no. 000000000058051

Built
2015
10 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete
Length
38 ft
3 main spans
Daily traffic
51
2022 count
Owner
County
County Highway Agency

About this bridge

110th ST over Middle River is a concrete culvert carrying 110th ST over Middle River in Adair County, Iowa. It was built in 2015, so it is 10 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 51 vehicles a day, projected to reach 51 by 2043. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries110th ST
CrossesMiddle River
Location3.1 MI E of N54 on 110th
RouteCounty Highway 0
CountyAdair County
StateIowa
Coordinates41.48955, -94.58413
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.3 US tons
Inventory rating38.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2022)
Projected traffic51 by 2043
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 110th ST over Middle River built?

It was built in 2015, making it 10 years old in 2025.

What condition is 110th ST over Middle 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 May 2023.

How much traffic does 110th ST over Middle River carry?

About 51 vehicles per day (2022 count).

How long is 110th ST over Middle River?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m).

Who owns 110th ST over Middle River?

It is owned by the County Highway Agency.