US Bridges

A34 210th ST over Little Rock River

Good

Lyon County, Iowa · 098430501 · Structure no. 000000000227961

Built
2015
10 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
277 ft
3 main spans
Daily traffic
718
2022 count
Owner
County
County Highway Agency

About this bridge

A34 210th ST over Little Rock River is a prestressed concrete stringer/multi-beam or girder carrying A34 210th ST over Little Rock River in Lyon County, Iowa. It was built in 2015, so it is 10 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 718 vehicles a day, roughly 12% of them trucks, projected to reach 718 by 2044. The structure is 277 ft (84.4 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesA34 210th ST
CrossesLittle Rock River
Location098430501
RouteCounty Highway 0
StateIowa
Coordinates43.34565, -95.94685
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.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length277 ft (84.4 m)
Longest span112 ft (34.1 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic718 (2022)
Projected traffic718 by 2044
Trucks12%
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 A34 210th ST over Little Rock River built?

It was built in 2015, making it 10 years old in 2025.

What condition is A34 210th ST over Little Rock River 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 A34 210th ST over Little Rock River carry?

About 718 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is A34 210th ST over Little Rock River?

The structure is 277 ft (84.4 m) long with a longest span of 112 ft (34.1 m) and a deck 33 ft wide.

Who owns A34 210th ST over Little Rock River?

It is owned by the County Highway Agency.