US Bridges

Redwood Road over Prairie Rose Spillway

Good

Shelby County, Iowa · 078380402 · Structure no. 000000000304181

Built
2023
2 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
59 ft
1 main span
Daily traffic
41
2022 count
Owner
County
County Highway Agency

About this bridge

Redwood Road over Prairie Rose Spillway is a steel stringer/multi-beam or girder carrying Redwood Road over Prairie Rose Spillway in Shelby County, Iowa. It was built in 2023, so it is 2 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 41 vehicles a day, projected to reach 41 by 2042. The structure is 59 ft (17.9 m) long and 24 ft wide.

Location

Open in Google Maps
CarriesRedwood Road
CrossesPrairie Rose Spillway
Location078380402
RouteCounty Highway 0
CountyShelby County
StateIowa
Coordinates41.59894, -95.23134
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.8 US tons
Inventory rating22.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length59 ft (17.9 m)
Longest span59 ft (17.9 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2022)
Projected traffic41 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Redwood Road over Prairie Rose Spillway built?

It was built in 2023, making it 2 years old in 2025.

What condition is Redwood Road over Prairie Rose Spillway 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 August 2023.

How much traffic does Redwood Road over Prairie Rose Spillway carry?

About 41 vehicles per day (2022 count).

How long is Redwood Road over Prairie Rose Spillway?

The structure is 59 ft (17.9 m) long with a longest span of 59 ft (17.9 m) and a deck 24 ft wide.

Who owns Redwood Road over Prairie Rose Spillway?

It is owned by the County Highway Agency.