US Bridges

S 54th ST over Rock Creek

Good

Clinton County, Iowa · 081063002 · Structure no. 000000000002271

Built
1991
34 years old
Condition
Good
inspected May 2024
Type
Slab
Concrete Continuous
Length
128 ft
3 main spans
Daily traffic
150
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

S 54th ST over Rock Creek is a concrete continuous slab carrying S 54th ST over Rock Creek in Clinton County, Iowa. It was built in 1991, so it is 34 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 150 vehicles a day, roughly 12% of them trucks, projected to reach 150 by 2044. The structure is 128 ft (39 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesS 54th ST
CrossesRock Creek
Location081063002
RouteCity Street 0
StateIowa
Coordinates41.79848, -90.31592
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.1 US tons
Inventory rating43.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length128 ft (39 m)
Longest span49 ft (14.9 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2022)
Projected traffic150 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$17,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S 54th ST over Rock Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is S 54th ST over Rock 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 S 54th ST over Rock Creek carry?

About 150 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is S 54th ST over Rock Creek?

The structure is 128 ft (39 m) long with a longest span of 49 ft (14.9 m) and a deck 33 ft wide.

Who owns S 54th ST over Rock Creek?

It is owned by the City or Municipal Highway Agency.