US Bridges

Ia 9 over Polly Creek

Fair

Osceola County, Iowa · 0.9 Mi. W Jct. Iowa 60 · Structure no. 000000000038460

Built
1950
75 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
1,970
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 9 over Polly Creek is a steel stringer/multi-beam or girder carrying Ia 9 over Polly Creek in Osceola County, Iowa. It was built in 1950, 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.

It carries about 1,970 vehicles a day, roughly 19% of them trucks, projected to reach 1,970 by 2044. The structure is 36 ft (11 m) long and 35 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesIa 9
CrossesPolly Creek
Location0.9 Mi. W Jct. Iowa 60
RouteState Highway 9
CountyOsceola County
StateIowa
Coordinates43.43266, -95.73118
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.4 US tons
Inventory rating25.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length36 ft (11 m)
Longest span33 ft (10.1 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,970 (2022)
Projected traffic1,970 by 2044
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Polly Creek built?

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

What condition is Ia 9 over Polly 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 Ia 9 over Polly Creek carry?

About 1,970 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is Ia 9 over Polly Creek?

The structure is 36 ft (11 m) long with a longest span of 33 ft (10.1 m) and a deck 35 ft wide.

Who owns Ia 9 over Polly Creek?

It is owned by the State Highway Agency.