US Bridges

Forest ST S over S Skunk River

Good

Jasper County, Iowa · 079210404 · Structure no. 000000000197321

Built
2004
21 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
381 ft
4 main spans
Daily traffic
200
2022 count
Owner
County
County Highway Agency

About this bridge

Forest ST S over S Skunk River is a prestressed concrete stringer/multi-beam or girder carrying Forest ST S over S Skunk River in Jasper 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 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 200 vehicles a day, projected to reach 200 by 2044. The structure is 381 ft (116.1 m) long and 27 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesForest ST S
CrossesS Skunk River
Location079210404
RouteCounty Highway 0
StateIowa
Coordinates41.68686, -93.29954
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating81.4 US tons
Inventory rating48.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length381 ft (116.1 m)
Longest span111 ft (33.8 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2022)
Projected traffic200 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Forest ST S over S Skunk River built?

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

What condition is Forest ST S over S Skunk River 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 April 2024.

How much traffic does Forest ST S over S Skunk River carry?

About 200 vehicles per day (2022 count).

How long is Forest ST S over S Skunk River?

The structure is 381 ft (116.1 m) long with a longest span of 111 ft (33.8 m) and a deck 27 ft wide.

Who owns Forest ST S over S Skunk River?

It is owned by the County Highway Agency.