US Bridges

240th ST over Dd

Good

Webster County, Iowa · 088301401 · Structure no. 000000000342891

Built
2013
12 years old
Condition
Good
inspected November 2021
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
70
2022 count
Owner
County
County Highway Agency

About this bridge

240th ST over Dd is a concrete continuous culvert carrying 240th ST over Dd in Webster County, Iowa. It was built in 2013, so it is 12 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 70 vehicles a day, projected to reach 70 by 2041. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries240th ST
CrossesDd
Location088301401
RouteCity Street 0
CountyWebster County
StateIowa
Coordinates42.44144, -94.302
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 inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2022)
Projected traffic70 by 2041
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 240th ST over Dd built?

It was built in 2013, making it 12 years old in 2025.

What condition is 240th ST over Dd 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 November 2021.

How much traffic does 240th ST over Dd carry?

About 70 vehicles per day (2022 count).

How long is 240th ST over Dd?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m).

Who owns 240th ST over Dd?

It is owned by the County Highway Agency.