US Bridges

T61 (310th Ave) over Fox River

Good

Appanoose County, Iowa · 069162706 · Structure no. 000000000014021

Built
2009
16 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
990
2022 count
Owner
County
County Highway Agency

About this bridge

T61 (310th Ave) over Fox River is a concrete continuous culvert carrying T61 (310th Ave) over Fox River in Appanoose County, Iowa. It was built in 2009, so it is 16 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 990 vehicles a day, roughly 8% of them trucks, projected to reach 990 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesT61 (310th Ave)
CrossesFox River
Location069162706
RouteCounty Highway 0
CountyAppanoose County
StateIowa
Coordinates40.74712, -92.69563
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic990 (2022)
Projected traffic990 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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$30,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was T61 (310th Ave) over Fox River built?

It was built in 2009, making it 16 years old in 2025.

What condition is T61 (310th Ave) over Fox River 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 October 2023.

How much traffic does T61 (310th Ave) over Fox River carry?

About 990 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is T61 (310th Ave) over Fox River?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns T61 (310th Ave) over Fox River?

It is owned by the County Highway Agency.