US Bridges

SW 34th ST over ST Johns RD

Fair

Polk County, Iowa · 078240700 · Structure no. 000000000500030

Built
1982
43 years old
Condition
Fair
inspected July 2023
Type
Frame
Concrete
Length
55 ft
1 main span
Daily traffic
684
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

SW 34th ST over ST Johns RD is a concrete frame carrying SW 34th ST over ST Johns RD in Polk County, Iowa. It was built in 1982, so it is 43 years old, younger 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 6 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 684 vehicles a day, projected to reach 684 by 2043. The structure is 55 ft (16.8 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSW 34th ST
CrossesST Johns RD
Location078240700
RouteCity Street 0
CountyPolk County
StateIowa
Coordinates41.57943, -93.66311
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating59 US tons
Inventory rating35.3 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length55 ft (16.8 m)
Longest span52 ft (15.9 m)
Deck width36 ft (11 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic684 (2022)
Projected traffic684 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SW 34th ST over ST Johns RD built?

It was built in 1982, making it 43 years old in 2025.

What condition is SW 34th ST over ST Johns RD 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 34th ST over ST Johns RD carry?

About 684 vehicles per day (2022 count).

How long is SW 34th ST over ST Johns RD?

The structure is 55 ft (16.8 m) long with a longest span of 52 ft (15.9 m) and a deck 36 ft wide.

Who owns SW 34th ST over ST Johns RD?

It is owned by the City or Municipal Highway Agency.