US Bridges

Log Ave over West Rat Creek

FairPosted for load

Lyon County, Iowa · 098431402 · Structure no. 000000000228020

Built
1900
125 years old, rebuilt 2007
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
54 ft
4 main spans
Daily traffic
34
2022 count
Owner
County
County Highway Agency

About this bridge

Log Ave over West Rat Creek is a wood or timber stringer/multi-beam or girder carrying Log Ave over West Rat Creek in Lyon County, Iowa. It was built in 1900 and reconstructed in 2007, so it is 125 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for other load-capacity restriction.

It carries about 34 vehicles a day, projected to reach 34 by 2044. The structure is 54 ft (16.5 m) long and 18 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLog Ave
CrossesWest Rat Creek
Location098431402
RouteCounty Highway 0
CountyLyon County
StateIowa
Coordinates43.30492, -95.90126
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.2 US tons
Inventory rating28.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span16 ft (4.9 m)
Deck width18 ft (5.4 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2022)
Projected traffic34 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Log Ave over West Rat Creek built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 2007.

What condition is Log Ave over West Rat Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does Log Ave over West Rat Creek carry?

About 34 vehicles per day (2022 count).

How long is Log Ave over West Rat Creek?

The structure is 54 ft (16.5 m) long with a longest span of 16 ft (4.9 m) and a deck 18 ft wide.

Who owns Log Ave over West Rat Creek?

It is owned by the County Highway Agency.