US Bridges

Redwood Ave over Blackhawk Creek

Good

Scott County, Iowa · 000000000 · Structure no. 000000000002920

Built
1984
41 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
67 ft
1 main span
Daily traffic
472
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Redwood Ave over Blackhawk Creek is a prestressed concrete stringer/multi-beam or girder carrying Redwood Ave over Blackhawk Creek in Scott County, Iowa. It was built in 1984, so it is 41 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 472 vehicles a day, projected to reach 472 by 2043. The structure is 67 ft (20.4 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesRedwood Ave
CrossesBlackhawk Creek
Location000000000
RouteCity Street 0
CountyScott County
StateIowa
Coordinates41.51734, -90.62172
Functional classUrban 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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83.9 US tons
Inventory rating64.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length67 ft (20.4 m)
Longest span48 ft (14.6 m)
Deck width44 ft (13.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic472 (2022)
Projected traffic472 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$60,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Redwood Ave over Blackhawk Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Redwood Ave over Blackhawk Creek 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 June 2023.

How much traffic does Redwood Ave over Blackhawk Creek carry?

About 472 vehicles per day (2022 count).

How long is Redwood Ave over Blackhawk Creek?

The structure is 67 ft (20.4 m) long with a longest span of 48 ft (14.6 m) and a deck 44 ft wide.

Who owns Redwood Ave over Blackhawk Creek?

It is owned by the City or Municipal Highway Agency.