US Bridges

Loc Canal ST over Willow River

PoorPosted for load

Harrison County, Iowa · 078442103 · Structure no. 000000000177720

Built
1916
109 years old, rebuilt 1967
Condition
Poor
inspected January 2024
Type
Truss - Thru
Steel
Length
110 ft
1 main span
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

Loc Canal ST over Willow River is a steel truss - thru carrying Loc Canal ST over Willow River in Harrison County, Iowa. It was built in 1916 and reconstructed in 1967, so it is 109 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 2 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: posted for load restriction.

It carries about 100 vehicles a day, projected to reach 100 by 2044. The structure is 110 ft (33.5 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLoc Canal ST
CrossesWillow River
Location078442103
RouteCounty Highway 0
StateIowa
Coordinates41.5499, -95.90304
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
Deck8 Very GoodNo problems noted.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating19.3 US tons
Inventory rating13.3 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+1 approach)
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span80 ft (24.4 m)
Deck width18 ft (5.4 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic100 by 2044
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Loc Canal ST over Willow River built?

It was built in 1916, making it 109 years old in 2025. It was reconstructed in 1967.

What condition is Loc Canal ST over Willow 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 January 2024.

How much traffic does Loc Canal ST over Willow River carry?

About 100 vehicles per day (2022 count).

How long is Loc Canal ST over Willow River?

The structure is 110 ft (33.5 m) long with a longest span of 80 ft (24.4 m) and a deck 18 ft wide.

Who owns Loc Canal ST over Willow River?

It is owned by the County Highway Agency.