US Bridges

Old Iowa 92 over Drainage Ditch

Poor

Marion County, Iowa · 075181807 · Structure no. 000000000035241

Built
1976
49 years old
Condition
Poor
inspected December 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
290
2022 count
Owner
County
County Highway Agency

About this bridge

Old Iowa 92 over Drainage Ditch is a concrete continuous culvert carrying Old Iowa 92 over Drainage Ditch in Marion County, Iowa. It was built in 1976, so it is 49 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 4 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.

It carries about 290 vehicles a day, roughly 20% of them trucks, projected to reach 290 by 2043. The structure is 25 ft (7.6 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesOld Iowa 92
CrossesDrainage Ditch
Location075181807
RouteCounty Highway 0
CountyMarion County
StateIowa
Coordinates41.30266, -92.97015
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width38 ft (11.7 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic290 (2022)
Projected traffic290 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$325,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Iowa 92 over Drainage Ditch built?

It was built in 1976, making it 49 years old in 2025.

What condition is Old Iowa 92 over Drainage Ditch 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 December 2023.

How much traffic does Old Iowa 92 over Drainage Ditch carry?

About 290 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is Old Iowa 92 over Drainage Ditch?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m) and a deck 38 ft wide.

Who owns Old Iowa 92 over Drainage Ditch?

It is owned by the County Highway Agency.