US Bridges

Minnesota Ave over Rio Grande Creek

FairPosted for load

Lyon County, Iowa · 098440207 · Structure no. 000000000005500

Built
1950
75 years old, rebuilt 1999
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
31 ft
2 main spans
Daily traffic
232
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Minnesota Ave over Rio Grande Creek is a wood or timber stringer/multi-beam or girder carrying Minnesota Ave over Rio Grande Creek in Lyon County, Iowa. It was built in 1950 and reconstructed in 1999, so it is 75 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 load restriction.

It carries about 232 vehicles a day, projected to reach 232 by 2044. The structure is 31 ft (9.4 m) long and 17 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMinnesota Ave
CrossesRio Grande Creek
Location098440207
RouteCity Street 0
CountyLyon County
StateIowa
Coordinates43.34256, -96.00514
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating23.4 US tons
Inventory rating19.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span16 ft (4.9 m)
Deck width17 ft (5.2 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic232 (2022)
Projected traffic232 by 2044
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$17,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Minnesota Ave over Rio Grande Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1999.

What condition is Minnesota Ave over Rio Grande 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 Minnesota Ave over Rio Grande Creek carry?

About 232 vehicles per day (2022 count).

How long is Minnesota Ave over Rio Grande Creek?

The structure is 31 ft (9.4 m) long with a longest span of 16 ft (4.9 m) and a deck 17 ft wide.

Who owns Minnesota Ave over Rio Grande Creek?

It is owned by the City or Municipal Highway Agency.