US Bridges

310th Ave over Carruthers Creek

Poor

Lucas County, Iowa · 073201504 · Structure no. 000000000226910

Built
1939
86 years old
Condition
Poor
inspected November 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
54 ft
3 main spans
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

310th Ave over Carruthers Creek is a wood or timber stringer/multi-beam or girder carrying 310th Ave over Carruthers Creek in Lucas County, Iowa. It was built in 1939, so it is 86 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 0 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, temporary structure in place while original is closed.

It carries about 26 vehicles a day, projected to reach 26 by 2043. The structure is 54 ft (16.5 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries310th Ave
CrossesCarruthers Creek
Location073201504
RouteCounty Highway 0
CountyLucas County
StateIowa
Coordinates41.12312, -93.15635
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck0 FailedOut of service and beyond corrective action.
Superstructure0 FailedOut of service and beyond corrective action.
Substructure0 FailedOut of service and beyond corrective action.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, temporary structure in place while original is closed
ScourFoundations stable; scour above top of footing
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span19 ft (5.8 m)
Deck width16 ft (4.8 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 310th Ave over Carruthers Creek built?

It was built in 1939, making it 86 years old in 2025.

What condition is 310th Ave over Carruthers Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

How much traffic does 310th Ave over Carruthers Creek carry?

About 26 vehicles per day (2022 count).

How long is 310th Ave over Carruthers Creek?

The structure is 54 ft (16.5 m) long with a longest span of 19 ft (5.8 m) and a deck 16 ft wide.

Who owns 310th Ave over Carruthers Creek?

It is owned by the County Highway Agency.