US Bridges

W Riverside RD over Skunk River

Fair

Story County, Iowa · 084242207 · Structure no. 000000000315621

Built
1989
36 years old
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
167 ft
3 main spans
Daily traffic
3,301
2022 count
Owner
County
County Highway Agency

About this bridge

W Riverside RD over Skunk River is a prestressed concrete stringer/multi-beam or girder carrying W Riverside RD over Skunk River in Story County, Iowa. It was built in 1989, so it is 36 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 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 3,301 vehicles a day, roughly 7% of them trucks, projected to reach 3,301 by 2042. The structure is 167 ft (50.9 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesW Riverside RD
CrossesSkunk River
Location084242207
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates42.0664, -93.62088
Functional classUrban Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.4 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length167 ft (50.9 m)
Longest span61 ft (18.6 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,301 (2022)
Projected traffic3,301 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 W Riverside RD over Skunk River built?

It was built in 1989, making it 36 years old in 2025.

What condition is W Riverside RD over Skunk River 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 December 2022.

How much traffic does W Riverside RD over Skunk River carry?

About 3,301 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is W Riverside RD over Skunk River?

The structure is 167 ft (50.9 m) long with a longest span of 61 ft (18.6 m) and a deck 32 ft wide.

Who owns W Riverside RD over Skunk River?

It is owned by the County Highway Agency.