US Bridges

Columbia ST over Lyons Creek

Good

Hamilton County, Iowa · 000000000 · Structure no. 000000000012281

Built
1982
43 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
58 ft
1 main span
Daily traffic
141
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Columbia ST over Lyons Creek is a prestressed concrete stringer/multi-beam or girder carrying Columbia ST over Lyons Creek in Hamilton County, Iowa. It was built in 1982, so it is 43 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 141 vehicles a day, projected to reach 141 by 2043. The structure is 58 ft (17.7 m) long and 39 ft wide.

CarriesColumbia ST
CrossesLyons Creek
Location000000000
RouteCity Street 0
StateIowa
Coordinates42.4685, -93.80477
Functional classUrban Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating87.1 US tons
Inventory rating39 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span55 ft (16.8 m)
Deck width39 ft (11.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic141 (2022)
Projected traffic141 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Columbia ST over Lyons Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is Columbia ST over Lyons 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 October 2023.

How much traffic does Columbia ST over Lyons Creek carry?

About 141 vehicles per day (2022 count).

How long is Columbia ST over Lyons Creek?

The structure is 58 ft (17.7 m) long with a longest span of 55 ft (16.8 m) and a deck 39 ft wide.

Who owns Columbia ST over Lyons Creek?

It is owned by the City or Municipal Highway Agency.