US Bridges

290th ST over Drainage Ditch

Good

Story County, Iowa · 0.4 MI E of US HWY 69 · Structure no. 000000000366420

Built
2019
6 years old
Condition
Good
inspected January 2023
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
120
2022 count
Owner
County
County Highway Agency

About this bridge

290th ST over Drainage Ditch is a concrete culvert carrying 290th ST over Drainage Ditch in Story County, Iowa. It was built in 2019, so it is 6 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 120 vehicles a day, projected to reach 120 by 2043. The structure is 24 ft (7.2 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries290th ST
CrossesDrainage Ditch
Location0.4 MI E of US HWY 69
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates41.93596, -93.60231
Functional classRural Minor Collector

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 inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length24 ft (7.2 m)
Longest span11 ft (3.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2022)
Projected traffic120 by 2043
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 290th ST over Drainage Ditch built?

It was built in 2019, making it 6 years old in 2025.

What condition is 290th ST over Drainage Ditch 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 January 2023.

How much traffic does 290th ST over Drainage Ditch carry?

About 120 vehicles per day (2022 count).

How long is 290th ST over Drainage Ditch?

The structure is 24 ft (7.2 m) long with a longest span of 11 ft (3.3 m).

Who owns 290th ST over Drainage Ditch?

It is owned by the County Highway Agency.