D36 270th ST over Lake Creek

Good

Calhoun County, Iowa · 088322909 · Structure no. 000000000016831

Built: 2021; 4 years old
Condition: Good; inspected July 2024
Type: Slab; Concrete Continuous
Length: 111 ft; 3 main spans
Daily traffic: 948; 2022 count
Owner: County; County Highway Agency

About this bridge

D36 270th ST over Lake Creek is a concrete continuous slab carrying D36 270th ST over Lake Creek in Calhoun 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 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 948 vehicles a day, projected to reach 948 by 2044. The structure is 111 ft (33.8 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesD36 270th ST

CrossesLake Creek

Location088322909

RouteCounty Highway 0

CountyCalhoun County

StateIowa

Coordinates42.39952, -94.60727

Functional classRural Major Collector

Condition and inspection

Good

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

Component	Rating	Meaning
Deck	8 Very Good	No problems noted.
Superstructure	8 Very Good	No problems noted.
Substructure	8 Very Good	No problems noted.
Channel and channel protection	8 Very Good	No problems noted.

Last inspectionJuly 2024

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour within limits of footing or piles

Structural evaluation8: Equal to present desirable criteria

Deck geometry6: Equal to present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment6: Equal to present minimum criteria

Operating rating53.9 US tons

Inventory rating41.8 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHL 93

Structure length111 ft (33.8 m)

Longest span43 ft (13.1 m)

Deck width33 ft (10.1 m)

Roadway width31 ft (9.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic948 (2022)

Projected traffic948 by 2044

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed9.9 mi (16 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 D36 270th ST over Lake Creek built?

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

What condition is D36 270th ST over Lake 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 D36 270th ST over Lake Creek carry?

About 948 vehicles per day (2022 count).

How long is D36 270th ST over Lake Creek?

The structure is 111 ft (33.8 m) long with a longest span of 43 ft (13.1 m) and a deck 33 ft wide.

Who owns D36 270th ST over Lake Creek?

It is owned by the County Highway Agency.