US Bridges

1320 150th ST over West Iowa River

Fair

Hancock County, Iowa · 094240801 · Structure no. 000000000172660

Built
1956
69 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
108 ft
3 main spans
Daily traffic
31
2021 count
Owner
County
County Highway Agency

About this bridge

1320 150th ST over West Iowa River is a prestressed concrete stringer/multi-beam or girder carrying 1320 150th ST over West Iowa River in Hancock County, Iowa. It was built in 1956, so it is 69 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 31 vehicles a day, projected to reach 31 by 2043. The structure is 108 ft (32.9 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries1320 150th ST
CrossesWest Iowa River
Location094240801
RouteCounty Highway 0
CountyHancock County
StateIowa
Coordinates42.98123, -93.71063
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.5 US tons
Inventory rating27.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length108 ft (32.9 m)
Longest span43 ft (13.1 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31 (2021)
Projected traffic31 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 1320 150th ST over West Iowa River built?

It was built in 1956, making it 69 years old in 2025.

What condition is 1320 150th ST over West Iowa 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 April 2023.

How much traffic does 1320 150th ST over West Iowa River carry?

About 31 vehicles per day (2021 count).

How long is 1320 150th ST over West Iowa River?

The structure is 108 ft (32.9 m) long with a longest span of 43 ft (13.1 m) and a deck 22 ft wide.

Who owns 1320 150th ST over West Iowa River?

It is owned by the County Highway Agency.