US Bridges

120th ST over Drainage Ditch #3

Good

Franklin County, Iowa · 091211701 · Structure no. 000000000157121

Built
2012
13 years old
Condition
Good
inspected June 2022
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
41
2022 count
Owner
County
County Highway Agency

About this bridge

120th ST over Drainage Ditch #3 is a concrete continuous culvert carrying 120th ST over Drainage Ditch #3 in Franklin County, Iowa. It was built in 2012, so it is 13 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 41 vehicles a day, projected to reach 41 by 2043. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries120th ST
CrossesDrainage Ditch #3
Location091211701
RouteCounty Highway 0
CountyFranklin County
StateIowa
Coordinates42.70232, -93.34352
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionJune 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating94.8 US tons
Inventory rating56.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2022)
Projected traffic41 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 120th ST over Drainage Ditch #3 built?

It was built in 2012, making it 13 years old in 2025.

What condition is 120th ST over Drainage Ditch #3 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 June 2022.

How much traffic does 120th ST over Drainage Ditch #3 carry?

About 41 vehicles per day (2022 count).

How long is 120th ST over Drainage Ditch #3?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns 120th ST over Drainage Ditch #3?

It is owned by the County Highway Agency.