US Bridges

Ia 17 over Boone River

Fair

Wright County, Iowa · 2.0 Mi. N of Jct. SR C70 · Structure no. 000000000054420

Built
1933
92 years old, rebuilt 2010
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
213 ft
3 main spans
Daily traffic
3,180
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 17 over Boone River is a steel continuous stringer/multi-beam or girder carrying Ia 17 over Boone River in Wright County, Iowa. It was built in 1933 and reconstructed in 2010, so it is 92 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 3,180 vehicles a day, roughly 18% of them trucks, projected to reach 3,180 by 2043. The structure is 213 ft (64.9 m) long and 35 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIa 17
CrossesBoone River
Location2.0 Mi. N of Jct. SR C70
RouteState Highway 17
CountyWright County
StateIowa
Coordinates42.60068, -93.90991
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.4 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length213 ft (64.9 m)
Longest span82 ft (25 m)
Deck width35 ft (10.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,180 (2023)
Projected traffic3,180 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 17 over Boone River built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 2010.

What condition is Ia 17 over Boone River 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 February 2024.

How much traffic does Ia 17 over Boone River carry?

About 3,180 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is Ia 17 over Boone River?

The structure is 213 ft (64.9 m) long with a longest span of 82 ft (25 m) and a deck 35 ft wide.

Who owns Ia 17 over Boone River?

It is owned by the State Highway Agency.