US Bridges

Local over Mill Race

Good

Iowa County, Iowa · 081092612 · Structure no. 000000000191131

Built
2001
24 years old
Condition
Good
inspected March 2023
Type
Slab
Concrete Continuous
Length
33 ft
1 main span
Daily traffic
1,002
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Mill Race is a concrete continuous slab carrying Local over Mill Race in Iowa County, Iowa. It was built in 2001, so it is 24 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 1,002 vehicles a day, projected to reach 1,002 by 2043. The structure is 33 ft (10.1 m) long and 32 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesLocal
CrossesMill Race
Location081092612
RouteCounty Highway 0
StateIowa
Coordinates41.79624, -91.86522
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.6 US tons
Inventory rating48.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span31 ft (9.4 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,002 (2022)
Projected traffic1,002 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Mill Race built?

It was built in 2001, making it 24 years old in 2025.

What condition is Local over Mill Race 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 2023.

How much traffic does Local over Mill Race carry?

About 1,002 vehicles per day (2022 count).

How long is Local over Mill Race?

The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.4 m) and a deck 32 ft wide.

Who owns Local over Mill Race?

It is owned by the County Highway Agency.