US Bridges

352nd Ave. over Brophy Creek

Good

Clinton County, Iowa · 082E50504 · Structure no. 000000000123962

Built
1996
29 years old
Condition
Good
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
51
2022 count
Owner
County
County Highway Agency

About this bridge

352nd Ave. over Brophy Creek is a prestressed concrete tee beam carrying 352nd Ave. over Brophy Creek in Clinton County, Iowa. It was built in 1996, so it is 29 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 51 vehicles a day, projected to reach 51 by 2044. The structure is 30 ft (9.1 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries352nd Ave.
CrossesBrophy Creek
Location082E50504
RouteCounty Highway 0
StateIowa
Coordinates41.94234, -90.40759
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating41.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2022)
Projected traffic51 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 352nd Ave. over Brophy Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is 352nd Ave. over Brophy 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 352nd Ave. over Brophy Creek carry?

About 51 vehicles per day (2022 count).

How long is 352nd Ave. over Brophy Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 24 ft wide.

Who owns 352nd Ave. over Brophy Creek?

It is owned by the County Highway Agency.