US Bridges

N 17th ST over Branch of Spring Creek

Good

Mahaska County, Iowa · 075150700 · Structure no. 000000000504841

Built
2020
5 years old
Condition
Good
inspected December 2022
Type
Slab
Concrete Continuous
Length
71 ft
3 main spans
Daily traffic
120
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

N 17th ST over Branch of Spring Creek is a concrete continuous slab carrying N 17th ST over Branch of Spring Creek in Mahaska 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 120 vehicles a day, projected to reach 120 by 2043. The structure is 71 ft (21.6 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesN 17th ST
CrossesBranch of Spring Creek
Location075150700
RouteCity Street 0
CountyMahaska County
StateIowa
Coordinates41.31371, -92.62314
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length71 ft (21.6 m)
Longest span28 ft (8.5 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2022)
Projected traffic120 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N 17th ST over Branch of Spring Creek built?

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

What condition is N 17th ST over Branch of Spring Creek 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 2022.

How much traffic does N 17th ST over Branch of Spring Creek carry?

About 120 vehicles per day (2022 count).

How long is N 17th ST over Branch of Spring Creek?

The structure is 71 ft (21.6 m) long with a longest span of 28 ft (8.5 m) and a deck 27 ft wide.

Who owns N 17th ST over Branch of Spring Creek?

It is owned by the City or Municipal Highway Agency.