US Bridges

260th ST over Dowd Creek

Good

Grundy County, Iowa · 87182801 · Structure no. 000000000365940

Built
2013
12 years old
Condition
Good
inspected April 2024
Type
Culvert
Steel
Length
22 ft
3 main spans
Daily traffic
20
2022 count
Owner
County
County Highway Agency

About this bridge

260th ST over Dowd Creek is a steel culvert carrying 260th ST over Dowd Creek in Grundy 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20 vehicles a day, projected to reach 20 by 2044. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Carries260th ST
CrossesDowd Creek
Location87182801
RouteCounty Highway 0
StateIowa
Coordinates42.32519, -92.94559
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span6 ft (1.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic20 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 260th ST over Dowd Creek built?

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

What condition is 260th ST over Dowd Creek 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 April 2024.

How much traffic does 260th ST over Dowd Creek carry?

About 20 vehicles per day (2022 count).

How long is 260th ST over Dowd Creek?

The structure is 22 ft (6.7 m) long with a longest span of 6 ft (1.7 m).

Who owns 260th ST over Dowd Creek?

It is owned by the County Highway Agency.