A34 210th ST over Kelly Creek

Good

Lyon County, Iowa · 098460401 · Structure no. 000000000034671

Built: 2017; 8 years old
Condition: Good; inspected July 2021
Type: Slab; Concrete Continuous
Length: 81 ft; 3 main spans
Daily traffic: 698; 2022 count
Owner: County; County Highway Agency

About this bridge

A34 210th ST over Kelly Creek is a concrete continuous slab carrying A34 210th ST over Kelly 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 698 vehicles a day, roughly 24% of them trucks, projected to reach 698 by 2041. The structure is 81 ft (24.7 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesA34 210th ST

CrossesKelly Creek

Location098460401

RouteCounty Highway 0

CountyLyon County

StateIowa

Coordinates43.34606, -96.28207

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 2021

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 alignment8: Equal to present desirable 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 length81 ft (24.7 m)

Longest span31 ft (9.4 m)

Deck width33 ft (10.1 m)

Roadway width31 ft (9.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic698 (2022)

Projected traffic698 by 2041

Trucks24%

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 A34 210th ST over Kelly Creek built?

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

What condition is A34 210th ST over Kelly 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 2021.

How much traffic does A34 210th ST over Kelly Creek carry?

About 698 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is A34 210th ST over Kelly Creek?

The structure is 81 ft (24.7 m) long with a longest span of 31 ft (9.4 m) and a deck 33 ft wide.

Who owns A34 210th ST over Kelly Creek?

It is owned by the County Highway Agency.