US Bridges

Ia 330 over Asher Creek

Good

Marshall County, Iowa · 2.0 Miles West of JCT 14 · Structure no. 000000000035520

Built
1957
68 years old
Condition
Good
inspected September 2024
Type
Tee Beam
Concrete Continuous
Length
154 ft
3 main spans
Daily traffic
1,490
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 330 over Asher Creek is a concrete continuous tee beam carrying Ia 330 over Asher Creek in Marshall County, Iowa. It was built in 1957, so it is 68 years old, older 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 1,490 vehicles a day, roughly 23% of them trucks, projected to reach 1,490 by 2044. The structure is 154 ft (46.9 m) long and 34 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesIa 330
CrossesAsher Creek
Location2.0 Miles West of JCT 14
RouteState Highway 330
CountyMarshall County
StateIowa
Coordinates42.12309, -92.94191
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.6 US tons
Inventory rating22.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length154 ft (46.9 m)
Longest span61 ft (18.6 m)
Deck width34 ft (10.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,490 (2022)
Projected traffic1,490 by 2044
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Ia 330 over Asher Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Ia 330 over Asher 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 Ia 330 over Asher Creek carry?

About 1,490 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is Ia 330 over Asher Creek?

The structure is 154 ft (46.9 m) long with a longest span of 61 ft (18.6 m) and a deck 34 ft wide.

Who owns Ia 330 over Asher Creek?

It is owned by the State Highway Agency.