US Bridges

110th ST over Keigley Branch

Fair

Story County, Iowa · 085240801 · Structure no. 000000000316301

Built
1978
47 years old
Condition
Fair
inspected November 2022
Type
Culvert
Concrete Continuous
Length
39 ft
3 main spans
Daily traffic
170
2022 count
Owner
County
County Highway Agency

About this bridge

110th ST over Keigley Branch is a concrete continuous culvert carrying 110th ST over Keigley Branch in Story County, Iowa. It was built in 1978, so it is 47 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 170 vehicles a day, roughly 12% of them trucks, projected to reach 170 by 2042. The structure is 39 ft (11.9 m) long. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
Carries110th ST
CrossesKeigley Branch
Location085240801
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates42.19524, -93.65973
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.4 US tons
Inventory rating18.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length39 ft (11.9 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 traffic170 (2022)
Projected traffic170 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Keigley Branch built?

It was built in 1978, making it 47 years old in 2025.

What condition is 110th ST over Keigley Branch 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 November 2022.

How much traffic does 110th ST over Keigley Branch carry?

About 170 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is 110th ST over Keigley Branch?

The structure is 39 ft (11.9 m) long with a longest span of 12 ft (3.7 m).

Who owns 110th ST over Keigley Branch?

It is owned by the County Highway Agency.