US Bridges

CO RD W15 over Skunk River Overflow

Good

Keokuk County, Iowa · 074100204 · Structure no. 000000000032661

Built
2004
21 years old
Condition
Good
inspected March 2021
Type
Slab
Concrete Continuous
Length
128 ft
3 main spans
Daily traffic
620
2022 count
Owner
County
County Highway Agency

About this bridge

CO RD W15 over Skunk River Overflow is a concrete continuous slab carrying CO RD W15 over Skunk River Overflow in Keokuk 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 620 vehicles a day, roughly 20% of them trucks, projected to reach 620 by 2043. The structure is 128 ft (39 m) long and 33 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesCO RD W15
CrossesSkunk River Overflow
Location074100204
RouteCounty Highway 0
StateIowa
Coordinates41.24582, -91.97795
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.6 US tons
Inventory rating58.3 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 traffic620 (2022)
Projected traffic620 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 CO RD W15 over Skunk River Overflow built?

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

What condition is CO RD W15 over Skunk River Overflow 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 March 2021.

How much traffic does CO RD W15 over Skunk River Overflow carry?

About 620 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is CO RD W15 over Skunk River Overflow?

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 CO RD W15 over Skunk River Overflow?

It is owned by the County Highway Agency.