US Bridges

70th ST over Stream

Good

Poweshiek County, Iowa · 080153104 · Structure no. 000000000293781

Built
2020
5 years old
Condition
Good
inspected December 2023
Type
Culvert
Steel
Length
24 ft
2 main spans
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

70th ST over Stream is a steel culvert carrying 70th ST over Stream in Poweshiek County, Iowa. It was built in 2020, so it is 5 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 26 vehicles a day, projected to reach 26 by 2043. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries70th ST
CrossesStream
Location080153104
RouteCounty Highway 0
CountyPoweshiek County
StateIowa
Coordinates41.68921, -92.64967
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 70th ST over Stream built?

It was built in 2020, making it 5 years old in 2025.

What condition is 70th ST over Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does 70th ST over Stream carry?

About 26 vehicles per day (2022 count).

How long is 70th ST over Stream?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m).

Who owns 70th ST over Stream?

It is owned by the County Highway Agency.