US Bridges

Ia 136 over Drainage Ditch

Fair

Clinton County, Iowa · 1.4 MI S of Jct. SR Y 32 · Structure no. 000000000021171

Built
1978
47 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
83 ft
3 main spans
Daily traffic
1,050
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 136 over Drainage Ditch is a concrete continuous slab carrying Ia 136 over Drainage Ditch in Clinton County, Iowa. It was built in 1978, so it is 47 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,050 vehicles a day, roughly 15% of them trucks, projected to reach 1,050 by 2044. The structure is 83 ft (25.3 m) long and 44 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesIa 136
CrossesDrainage Ditch
Location1.4 MI S of Jct. SR Y 32
RouteState Highway 136
CountyClinton County
StateIowa
Coordinates41.96767, -90.83187
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64 US tons
Inventory rating38.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length83 ft (25.3 m)
Longest span31 ft (9.4 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2022)
Projected traffic1,050 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 136 over Drainage Ditch built?

It was built in 1978, making it 47 years old in 2025.

What condition is Ia 136 over Drainage Ditch in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.

How much traffic does Ia 136 over Drainage Ditch carry?

About 1,050 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Ia 136 over Drainage Ditch?

The structure is 83 ft (25.3 m) long with a longest span of 31 ft (9.4 m) and a deck 44 ft wide.

Who owns Ia 136 over Drainage Ditch?

It is owned by the State Highway Agency.