B15 330th ST over Spring Creek

Fair

Cerro Gordo County, Iowa · 097200903 · Structure no. 000000000019140

Built: 1957; 68 years old
Condition: Fair; inspected January 2024
Type: Slab; Concrete Continuous
Length: 122 ft; 3 main spans
Daily traffic: 570; 2022 count
Owner: County; County Highway Agency

About this bridge

B15 330th ST over Spring Creek is a concrete continuous slab carrying B15 330th ST over Spring Creek in Cerro Gordo 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 570 vehicles a day, roughly 12% of them trucks, projected to reach 570 by 2044. The structure is 122 ft (37.2 m) long and 34 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesB15 330th ST

CrossesSpring Creek

Location097200903

RouteCounty Highway 0

CountyCerro Gordo County

StateIowa

Coordinates43.24196, -93.20888

Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionJanuary 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum 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 rating61.4 US tons

Inventory rating26.7 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length122 ft (37.2 m)

Longest span46 ft (14 m)

Deck width34 ft (10.3 m)

Roadway width28 ft (8.6 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic570 (2022)

Projected traffic570 by 2044

Trucks12%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed11.8 mi (19 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was B15 330th ST over Spring Creek built?

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

What condition is B15 330th ST over Spring Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does B15 330th ST over Spring Creek carry?

About 570 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is B15 330th ST over Spring Creek?

The structure is 122 ft (37.2 m) long with a longest span of 46 ft (14 m) and a deck 34 ft wide.

Who owns B15 330th ST over Spring Creek?

It is owned by the County Highway Agency.