US Bridges

Ia 83 over Drainage Ditch

Good

Cass County, Iowa · 0.6 Mi. E of S.R. N28 · Structure no. 000000000017461

Built
1987
38 years old
Condition
Good
inspected February 2023
Type
Slab
Concrete Continuous
Length
82 ft
3 main spans
Daily traffic
2,120
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 83 over Drainage Ditch is a concrete continuous slab carrying Ia 83 over Drainage Ditch in Cass County, Iowa. It was built in 1987, so it is 38 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 2,120 vehicles a day, roughly 11% of them trucks, projected to reach 2,120 by 2042. The structure is 82 ft (25 m) long and 39 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesIa 83
CrossesDrainage Ditch
Location0.6 Mi. E of S.R. N28
RouteState Highway 83
StateIowa
Coordinates41.41137, -94.86194
Functional classRural Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment7: Better than present minimum criteria
Operating rating93.6 US tons
Inventory rating56.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length82 ft (25 m)
Longest span31 ft (9.4 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,120 (2022)
Projected traffic2,120 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 83 over Drainage Ditch built?

It was built in 1987, making it 38 years old in 2025.

What condition is Ia 83 over Drainage Ditch 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 February 2023.

How much traffic does Ia 83 over Drainage Ditch carry?

About 2,120 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Ia 83 over Drainage Ditch?

The structure is 82 ft (25 m) long with a longest span of 31 ft (9.4 m) and a deck 39 ft wide.

Who owns Ia 83 over Drainage Ditch?

It is owned by the State Highway Agency.