US Bridges

Ia 9 over Smith Creek

Fair

Winneshiek County, Iowa · 5.6 Mi. W Jct. Ia 51 · Structure no. 000000000052630

Built
1969
56 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
253 ft
2 main spans
Daily traffic
2,310
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 9 over Smith Creek is a steel continuous stringer/multi-beam or girder carrying Ia 9 over Smith Creek in Winneshiek County, Iowa. It was built in 1969, so it is 56 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,310 vehicles a day, roughly 30% of them trucks, projected to reach 2,310 by 2044. The structure is 253 ft (77.1 m) long and 48 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesIa 9
CrossesSmith Creek
Location5.6 Mi. W Jct. Ia 51
RouteState Highway 9
CountyWinneshiek County
StateIowa
Coordinates43.24099, -91.68218
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating62.1 US tons
Inventory rating37.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length253 ft (77.1 m)
Longest span124 ft (37.8 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,310 (2022)
Projected traffic2,310 by 2044
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 9 over Smith Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Ia 9 over Smith 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 August 2024.

How much traffic does Ia 9 over Smith Creek carry?

About 2,310 vehicles per day (2022 count), of which roughly 30% are trucks.

How long is Ia 9 over Smith Creek?

The structure is 253 ft (77.1 m) long with a longest span of 124 ft (37.8 m) and a deck 48 ft wide.

Who owns Ia 9 over Smith Creek?

It is owned by the State Highway Agency.