US Bridges

340th ST over Waterman Creek

Good

O'Brien County, Iowa · 096390701 · Structure no. 000000000260611

Built
2021
4 years old
Condition
Good
inspected May 2024
Type
Slab
Concrete Continuous
Length
133 ft
3 main spans
Daily traffic
41
2022 count
Owner
County
County Highway Agency

About this bridge

340th ST over Waterman Creek is a concrete continuous slab carrying 340th ST over Waterman Creek in O'Brien County, Iowa. It was built in 2021, so it is 4 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 41 vehicles a day, projected to reach 41 by 2044. The structure is 133 ft (40.5 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries340th ST
CrossesWaterman Creek
Location096390701
RouteCounty Highway 0
StateIowa
Coordinates43.15699, -95.49617
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating44 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length133 ft (40.5 m)
Longest span51 ft (15.5 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2022)
Projected traffic41 by 2044
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 340th ST over Waterman Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is 340th ST over Waterman 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 May 2024.

How much traffic does 340th ST over Waterman Creek carry?

About 41 vehicles per day (2022 count).

How long is 340th ST over Waterman Creek?

The structure is 133 ft (40.5 m) long with a longest span of 51 ft (15.5 m) and a deck 27 ft wide.

Who owns 340th ST over Waterman Creek?

It is owned by the County Highway Agency.