US Bridges

Walnut ST over Odebolt Creek

Good

Sac County, Iowa · 087382708 · Structure no. 000000000008891

Built
2023
2 years old
Condition
Good
inspected September 2024
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
120
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Walnut ST over Odebolt Creek is a concrete continuous culvert carrying Walnut ST over Odebolt Creek in Sac County, Iowa. It was built in 2023, so it is 2 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 9 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 29 ft (8.8 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesWalnut ST
CrossesOdebolt Creek
Location087382708
RouteCity Street 0
CountySac County
StateIowa
Coordinates42.31541, -95.25247
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.
Culvert9 ExcellentNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.9 US tons
Inventory rating37.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHL 93
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width45 ft (13.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2023)
Projected traffic120 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Walnut ST over Odebolt Creek built?

It was built in 2023, making it 2 years old in 2025.

What condition is Walnut ST over Odebolt 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 September 2024.

How much traffic does Walnut ST over Odebolt Creek carry?

About 120 vehicles per day (2023 count).

How long is Walnut ST over Odebolt Creek?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m) and a deck 45 ft wide.

Who owns Walnut ST over Odebolt Creek?

It is owned by the City or Municipal Highway Agency.