US Bridges

230th Avenue over Deep Creek

Good

Clinton County, Iowa · 083E33202 · Structure no. 000000000125171

Built
2004
21 years old
Condition
Good
inspected December 2024
Type
Tee Beam
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

230th Avenue over Deep Creek is a prestressed concrete tee beam carrying 230th Avenue over Deep Creek in Clinton County, Iowa. It was built in 2004, so it is 21 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 30 vehicles a day, projected to reach 30 by 2044. The structure is 51 ft (15.5 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Carries230th Avenue
CrossesDeep Creek
Location083E33202
RouteCounty Highway 0
StateIowa
Coordinates41.95829, -90.6454
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 protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.6 US tons
Inventory rating31.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span50 ft (15.2 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was 230th Avenue over Deep Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is 230th Avenue over Deep 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 December 2024.

How much traffic does 230th Avenue over Deep Creek carry?

About 30 vehicles per day (2022 count).

How long is 230th Avenue over Deep Creek?

The structure is 51 ft (15.5 m) long with a longest span of 50 ft (15.2 m) and a deck 28 ft wide.

Who owns 230th Avenue over Deep Creek?

It is owned by the County Highway Agency.