US Bridges

I 35 SB Off Ramp over Drainage Ditch

Fair

Franklin County, Iowa · 0.1 Miles North of Jct. 3 · Structure no. 000000000602495

Built
1974
51 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
680
2022 count
Owner
State
State Highway Agency

About this bridge

I 35 SB Off Ramp over Drainage Ditch is a concrete continuous culvert carrying I 35 SB Off Ramp over Drainage Ditch in Franklin County, Iowa. It was built in 1974, so it is 51 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 680 vehicles a day, roughly 32% of them trucks, projected to reach 680 by 2043. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 35 SB Off Ramp
CrossesDrainage Ditch
Location0.1 Miles North of Jct. 3
RouteInterstate 35
CountyFranklin County
StateIowa
Coordinates42.74698, -93.39862
Functional classRural Principal Arterial - Interstate

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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.7 US tons
Inventory rating35.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic680 (2022)
Projected traffic680 by 2043
Trucks32%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 I 35 SB Off Ramp over Drainage Ditch built?

It was built in 1974, making it 51 years old in 2025.

What condition is I 35 SB Off Ramp 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 July 2023.

How much traffic does I 35 SB Off Ramp over Drainage Ditch carry?

About 680 vehicles per day (2022 count), of which roughly 32% are trucks.

How long is I 35 SB Off Ramp over Drainage Ditch?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m).

Who owns I 35 SB Off Ramp over Drainage Ditch?

It is owned by the State Highway Agency.