US Bridges

Ia 150 over Harte Creek

Fair

Buchanan County, Iowa · 0.2 Mi. N of Jct. SR D16 · Structure no. 000000000015961

Built
1984
41 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
3,890
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 150 over Harte Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 150 over Harte Creek in Buchanan County, Iowa. It was built in 1984, so it is 41 years old, younger 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 3,890 vehicles a day, roughly 12% of them trucks, projected to reach 3,890 by 2044. The structure is 75 ft (22.9 m) long and 43 ft wide. If it were closed, the detour would be 28 mi (45 km).

Location

Open in Google Maps
CarriesIa 150
CrossesHarte Creek
Location0.2 Mi. N of Jct. SR D16
RouteState Highway 150
CountyBuchanan County
StateIowa
Coordinates42.50126, -91.88955
Functional classRural Principal Arterial - Other

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating95 US tons
Inventory rating43.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span71 ft (21.6 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,890 (2022)
Projected traffic3,890 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 km)
TollOn a free road
National Highway SystemYes

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 150 over Harte Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Ia 150 over Harte 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 May 2024.

How much traffic does Ia 150 over Harte Creek carry?

About 3,890 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Ia 150 over Harte Creek?

The structure is 75 ft (22.9 m) long with a longest span of 71 ft (21.6 m) and a deck 43 ft wide.

Who owns Ia 150 over Harte Creek?

It is owned by the State Highway Agency.