US Bridges

Indigo Ave over Drainage Ditch No 55

Good

Franklin County, Iowa · 93211802 · Structure no. 000000000158581

Built
2018
7 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

Indigo Ave over Drainage Ditch No 55 is a concrete culvert carrying Indigo Ave over Drainage Ditch No 55 in Franklin County, Iowa. It was built in 2018, so it is 7 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 26 vehicles a day, projected to reach 26 by 2044. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIndigo Ave
CrossesDrainage Ditch No 55
Location93211802
RouteCounty Highway 0
CountyFranklin County
StateIowa
Coordinates42.83612, -93.34031
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 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52.1 US tons
Inventory rating40.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length21 ft (6.4 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2044
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Indigo Ave over Drainage Ditch No 55 built?

It was built in 2018, making it 7 years old in 2025.

What condition is Indigo Ave over Drainage Ditch No 55 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 2024.

How much traffic does Indigo Ave over Drainage Ditch No 55 carry?

About 26 vehicles per day (2022 count).

How long is Indigo Ave over Drainage Ditch No 55?

The structure is 21 ft (6.4 m) long with a longest span of 8 ft (2.4 m).

Who owns Indigo Ave over Drainage Ditch No 55?

It is owned by the County Highway Agency.