US Bridges

Broad ST over Skunk River

Good

Story County, Iowa · 085241201 · Structure no. 000000000011171

Built
1996
29 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
167 ft
3 main spans
Daily traffic
5,834
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Broad ST over Skunk River is a prestressed concrete continuous stringer/multi-beam or girder carrying Broad ST over Skunk River in Story County, Iowa. It was built in 1996, so it is 29 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 5,834 vehicles a day, projected to reach 5,834 by 2044. The structure is 167 ft (50.9 m) long and 67 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesBroad ST
CrossesSkunk River
Location085241201
RouteCity Street 0
StateIowa
Coordinates42.18754, -93.58473
Functional classRural Major Collector

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 inspectionMarch 2024
Inspection intervalevery 48 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 rating48.6 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length167 ft (50.9 m)
Longest span61 ft (18.6 m)
Deck width67 ft (20.4 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,834 (2022)
Projected traffic5,834 by 2044
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Broad ST over Skunk River built?

It was built in 1996, making it 29 years old in 2025.

What condition is Broad ST over Skunk River 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 March 2024.

How much traffic does Broad ST over Skunk River carry?

About 5,834 vehicles per day (2022 count).

How long is Broad ST over Skunk River?

The structure is 167 ft (50.9 m) long with a longest span of 61 ft (18.6 m) and a deck 67 ft wide.

Who owns Broad ST over Skunk River?

It is owned by the City or Municipal Highway Agency.