US Bridges

Ia 117 over Drainage Ditch

Fair

Jasper County, Iowa · 1.1 Miles S of JCT US 65 · Structure no. 000000000030790

Built
1956
69 years old
Condition
Fair
inspected January 2023
Type
Slab
Concrete
Length
32 ft
1 main span
Daily traffic
1,580
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 117 over Drainage Ditch is a concrete slab carrying Ia 117 over Drainage Ditch in Jasper County, Iowa. It was built in 1956, so it is 69 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 1,580 vehicles a day, roughly 12% of them trucks, projected to reach 1,580 by 2042. The structure is 32 ft (9.8 m) long and 36 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesIa 117
CrossesDrainage Ditch
Location1.1 Miles S of JCT US 65
RouteState Highway 117
CountyJasper County
StateIowa
Coordinates41.79263, -93.30932
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 protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating34.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,580 (2022)
Projected traffic1,580 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 117 over Drainage Ditch built?

It was built in 1956, making it 69 years old in 2025.

What condition is Ia 117 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 January 2023.

How much traffic does Ia 117 over Drainage Ditch carry?

About 1,580 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Ia 117 over Drainage Ditch?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 36 ft wide.

Who owns Ia 117 over Drainage Ditch?

It is owned by the State Highway Agency.