US Bridges

Ia 9 over Drainage Ditch

Fair

Howard County, Iowa · 4.1 Mi. W of Jct. U.S. 63 · Structure no. 000000000028741

Built
1976
49 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
33 ft
3 main spans
Daily traffic
1,630
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 9 over Drainage Ditch is a concrete continuous culvert carrying Ia 9 over Drainage Ditch in Howard 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 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 1,630 vehicles a day, roughly 22% of them trucks, projected to reach 1,630 by 2042. The structure is 33 ft (10.1 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIa 9
CrossesDrainage Ditch
Location4.1 Mi. W of Jct. U.S. 63
RouteState Highway 9
CountyHoward County
StateIowa
Coordinates43.37119, -92.38112
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating34.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,630 (2022)
Projected traffic1,630 by 2042
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 9 over Drainage Ditch built?

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

What condition is Ia 9 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 April 2023.

How much traffic does Ia 9 over Drainage Ditch carry?

About 1,630 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is Ia 9 over Drainage Ditch?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 43 ft wide.

Who owns Ia 9 over Drainage Ditch?

It is owned by the State Highway Agency.