US Bridges

SR W21 (u Ave) over Old Mans Creek

Good

Iowa County, Iowa · 079093306 · Structure no. 000000000189251

Built
2012
13 years old
Condition
Good
inspected March 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
179 ft
3 main spans
Daily traffic
450
2022 count
Owner
County
County Highway Agency

About this bridge

SR W21 (u Ave) over Old Mans Creek is a prestressed concrete stringer/multi-beam or girder carrying SR W21 (u Ave) over Old Mans Creek in Iowa County, Iowa. It was built in 2012, so it is 13 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 450 vehicles a day, roughly 18% of them trucks, projected to reach 450 by 2043. The structure is 179 ft (54.6 m) long and 34 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesSR W21 (u Ave)
CrossesOld Mans Creek
Location079093306
RouteCounty Highway 0
CountyIowa County
StateIowa
Coordinates41.6017, -91.9094
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 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating67.1 US tons
Inventory rating51.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length179 ft (54.6 m)
Longest span65 ft (19.8 m)
Deck width34 ft (10.3 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2022)
Projected traffic450 by 2043
Trucks18%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR W21 (u Ave) over Old Mans Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is SR W21 (u Ave) over Old Mans 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 March 2022.

How much traffic does SR W21 (u Ave) over Old Mans Creek carry?

About 450 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is SR W21 (u Ave) over Old Mans Creek?

The structure is 179 ft (54.6 m) long with a longest span of 65 ft (19.8 m) and a deck 34 ft wide.

Who owns SR W21 (u Ave) over Old Mans Creek?

It is owned by the County Highway Agency.