US Bridges

SW 7th ST over Raccoon R & Trail

Fair

Polk County, Iowa · 000000000 · Structure no. 000000000003980

Built
1915
110 years old, rebuilt 1968
Condition
Fair
inspected July 2023
Type
Arch - Deck
Concrete Continuous
Length
799 ft
4 main spans
Daily traffic
7,253
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

SW 7th ST over Raccoon R & Trail is a concrete continuous arch - deck carrying SW 7th ST over Raccoon R & Trail in Polk County, Iowa. It was built in 1915 and reconstructed in 1968, so it is 110 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 7,253 vehicles a day, projected to reach 7,253 by 2043. The structure is 799 ft (243.5 m) long and 58 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSW 7th ST
CrossesRaccoon R & Trail
Location000000000
RouteCity Street 0
StateIowa
Coordinates41.57326, -93.62129
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating48.6 US tons
Inventory rating29.1 US tons

Structure

Structure typeArch - Deck
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4 (+7 approach)
Design loadH 20
Structure length799 ft (243.5 m)
Longest span122 ft (37.2 m)
Deck width58 ft (17.8 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,253 (2022)
Projected traffic7,253 by 2043
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad and waterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$550,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SW 7th ST over Raccoon R & Trail built?

It was built in 1915, making it 110 years old in 2025. It was reconstructed in 1968.

What condition is SW 7th ST over Raccoon R & Trail in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does SW 7th ST over Raccoon R & Trail carry?

About 7,253 vehicles per day (2022 count).

How long is SW 7th ST over Raccoon R & Trail?

The structure is 799 ft (243.5 m) long with a longest span of 122 ft (37.2 m) and a deck 58 ft wide.

Who owns SW 7th ST over Raccoon R & Trail?

It is owned by the City or Municipal Highway Agency.