US Bridges

Inkpaduta Ave over Boone River

PoorClosed to traffic

Hamilton County, Iowa · 088253003 · Structure no. 000000000171910

Built
1907
118 years old
Condition
Poor
inspected September 2023
Type
Truss - Thru
Steel
Length
207 ft
1 main span
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

Inkpaduta Ave over Boone River is a steel truss - thru carrying Inkpaduta Ave over Boone River in Hamilton County, Iowa. It was built in 1907, so it is 118 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 0 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 40 vehicles a day, projected to reach 40 by 2043. The structure is 207 ft (63.1 m) long and 16 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesInkpaduta Ave
CrossesBoone River
Location088253003
RouteCounty Highway 0
CountyHamilton County
StateIowa
Coordinates42.40544, -93.80953
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck0 FailedOut of service and beyond corrective action.
Superstructure0 FailedOut of service and beyond corrective action.
Substructure0 FailedOut of service and beyond corrective action.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; scour above top of footing
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadUnknown
Structure length207 ft (63.1 m)
Longest span156 ft (47.5 m)
Deck width16 ft (4.8 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic40 (2022)
Projected traffic40 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.2 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Inkpaduta Ave over Boone River built?

It was built in 1907, making it 118 years old in 2025.

What condition is Inkpaduta Ave over Boone River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.

How much traffic does Inkpaduta Ave over Boone River carry?

About 40 vehicles per day (2022 count).

How long is Inkpaduta Ave over Boone River?

The structure is 207 ft (63.1 m) long with a longest span of 156 ft (47.5 m) and a deck 16 ft wide.

Who owns Inkpaduta Ave over Boone River?

It is owned by the County Highway Agency.