US Bridges

L36 over Coon Creek

Good

Woodbury County, Iowa · 088433602 · Structure no. 000000000353401

Built
2021
4 years old
Condition
Good
inspected July 2024
Type
Slab
Concrete Continuous
Length
131 ft
3 main spans
Daily traffic
180
2022 count
Owner
County
County Highway Agency

About this bridge

L36 over Coon Creek is a concrete continuous slab carrying L36 over Coon Creek in Woodbury County, Iowa. It was built in 2021, so it is 4 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 180 vehicles a day, roughly 11% of them trucks, projected to reach 180 by 2044. The structure is 131 ft (39.9 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesL36
CrossesCoon Creek
Location088433602
RouteCounty Highway 0
StateIowa
Coordinates42.39655, -95.80597
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.3 US tons
Inventory rating45.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length131 ft (39.9 m)
Longest span51 ft (15.5 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2022)
Projected traffic180 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$30,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was L36 over Coon Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is L36 over Coon 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 July 2024.

How much traffic does L36 over Coon Creek carry?

About 180 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is L36 over Coon Creek?

The structure is 131 ft (39.9 m) long with a longest span of 51 ft (15.5 m) and a deck 33 ft wide.

Who owns L36 over Coon Creek?

It is owned by the County Highway Agency.