US Bridges

136th ST over Br Walnut Creek

Good

Jefferson County, Iowa · 73081903 · Structure no. 000000000201921

Built
2018
7 years old
Condition
Good
inspected February 2023
Type
Culvert
Steel
Length
20 ft
2 main spans
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

136th ST over Br Walnut Creek is a steel culvert carrying 136th ST over Br Walnut Creek in Jefferson 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 40 vehicles a day, projected to reach 40 by 2043. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries136th ST
CrossesBr Walnut Creek
Location73081903
RouteCounty Highway 0
CountyJefferson County
StateIowa
Coordinates41.1105, -91.8306
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 protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2022)
Projected traffic40 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 136th ST over Br Walnut Creek built?

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

What condition is 136th ST over Br Walnut Creek 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 February 2023.

How much traffic does 136th ST over Br Walnut Creek carry?

About 40 vehicles per day (2022 count).

How long is 136th ST over Br Walnut Creek?

The structure is 20 ft (6.1 m) long with a longest span of 10 ft (3 m).

Who owns 136th ST over Br Walnut Creek?

It is owned by the County Highway Agency.