Larch Ave over Tom Creek

Good

Lyon County, Iowa · 100432102 · Structure no. 000000000230801

Built: 2017; 8 years old
Condition: Good; inspected July 2024
Type: Slab; Concrete Continuous
Length: 80 ft; 3 main spans
Daily traffic: 21; 2022 count
Owner: County; County Highway Agency

About this bridge

Larch Ave over Tom Creek is a concrete continuous slab carrying Larch Ave over Tom Creek in Lyon County, Iowa. It was built in 2017, so it is 8 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 21 vehicles a day, projected to reach 21 by 2044. The structure is 80 ft (24.4 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesLarch Ave

CrossesTom Creek

Location100432102

RouteCounty Highway 0

CountyLyon County

StateIowa

Coordinates43.46718, -95.94032

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.

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	7 Good	Some minor problems.

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 geometry7: Better than present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment6: Equal to present minimum criteria

Operating rating46.4 US tons

Inventory rating35.7 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHL 93

Structure length80 ft (24.4 m)

Longest span31 ft (9.4 m)

Deck width31 ft (9.4 m)

Roadway width28 ft (8.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2022)

Projected traffic21 by 2044

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed1.9 mi (3 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 Larch Ave over Tom Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is Larch Ave over Tom 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 Larch Ave over Tom Creek carry?

About 21 vehicles per day (2022 count).

How long is Larch Ave over Tom Creek?

The structure is 80 ft (24.4 m) long with a longest span of 31 ft (9.4 m) and a deck 31 ft wide.

Who owns Larch Ave over Tom Creek?

It is owned by the County Highway Agency.