US Bridges

Aspen RD over Willow Creek

FairPosted for load

Clayton County, Iowa · 092060507 · Structure no. 000000000119130

Built
1914
111 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
275
2022 count
Owner
County
County Highway Agency

About this bridge

Aspen RD over Willow Creek is a concrete slab carrying Aspen RD over Willow Creek in Clayton County, Iowa. It was built in 1914, so it is 111 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 275 vehicles a day, roughly 20% of them trucks, projected to reach 275 by 2044. The structure is 26 ft (7.9 m) long and 19 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesAspen RD
CrossesWillow Creek
Location092060507
RouteCounty Highway 0
CountyClayton County
StateIowa
Coordinates42.81779, -91.57596
Functional classRural Major Collector

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.
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65.3 US tons
Inventory rating39.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span23 ft (7 m)
Deck width19 ft (5.7 m)
Roadway width17 ft (5.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2022)
Projected traffic275 by 2044
Trucks20%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Aspen RD over Willow Creek built?

It was built in 1914, making it 111 years old in 2025.

What condition is Aspen RD over Willow 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 October 2024.

How much traffic does Aspen RD over Willow Creek carry?

About 275 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is Aspen RD over Willow Creek?

The structure is 26 ft (7.9 m) long with a longest span of 23 ft (7 m) and a deck 19 ft wide.

Who owns Aspen RD over Willow Creek?

It is owned by the County Highway Agency.