US Bridges

203rd ST over Lyon Creek

Good

Hamilton County, Iowa · 089252603 · Structure no. 000000000366540

Built
2019
6 years old
Condition
Good
inspected September 2022
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

203rd ST over Lyon Creek is a concrete continuous culvert carrying 203rd ST over Lyon Creek in Hamilton 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 40 vehicles a day, projected to reach 40 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries203rd ST
CrossesLyon Creek
Location089252603
RouteCounty Highway 0
CountyHamilton County
StateIowa
Coordinates42.49675, -93.76621
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 inspectionSeptember 2022
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 rating49.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHL 93
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2022)
Projected traffic40 by 2043
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 203rd ST over Lyon Creek built?

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

What condition is 203rd ST over Lyon 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 September 2022.

How much traffic does 203rd ST over Lyon Creek carry?

About 40 vehicles per day (2022 count).

How long is 203rd ST over Lyon Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns 203rd ST over Lyon Creek?

It is owned by the County Highway Agency.