US Bridges

Northwest Blvd over Otter Creek

Good

Osceola County, Iowa · 000600230 · Structure no. 000000000038581

Built
1985
40 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
797
2022 count
Owner
County
County Highway Agency

About this bridge

Northwest Blvd over Otter Creek is a concrete continuous culvert carrying Northwest Blvd over Otter Creek in Osceola County, Iowa. It was built in 1985, so it is 40 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 797 vehicles a day, roughly 6% of them trucks, projected to reach 797 by 2044. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNorthwest Blvd
CrossesOtter Creek
Location000600230
RouteCounty Highway 0
StateIowa
Coordinates43.41833, -95.74993
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2024
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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating23.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic797 (2022)
Projected traffic797 by 2044
Trucks6%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Northwest Blvd over Otter Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is Northwest Blvd over Otter 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 November 2024.

How much traffic does Northwest Blvd over Otter Creek carry?

About 797 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Northwest Blvd over Otter Creek?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns Northwest Blvd over Otter Creek?

It is owned by the County Highway Agency.