US Bridges

330th ST over Dry Creek

Fair

Buchanan County, Iowa · 087073301 · Structure no. 000000000080981

Built
2007
18 years old
Condition
Fair
inspected February 2024
Type
Other
Steel
Length
68 ft
1 main span
Daily traffic
62
2022 count
Owner
County
County Highway Agency

About this bridge

330th ST over Dry Creek is a steel other carrying 330th ST over Dry Creek in Buchanan County, Iowa. It was built in 2007, so it is 18 years old, younger 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 62 vehicles a day, projected to reach 62 by 2044. The structure is 68 ft (20.7 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries330th ST
CrossesDry Creek
Location087073301
RouteCounty Highway 0
CountyBuchanan County
StateIowa
Coordinates42.31122, -91.66586
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.1 US tons
Inventory rating21.8 US tons

Structure

Structure typeOther
MaterialSteel
DeckSteel plate
Main spans1
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span66 ft (20.1 m)
Deck width27 ft (8.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2022)
Projected traffic62 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 330th ST over Dry Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is 330th ST over Dry 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 February 2024.

How much traffic does 330th ST over Dry Creek carry?

About 62 vehicles per day (2022 count).

How long is 330th ST over Dry Creek?

The structure is 68 ft (20.7 m) long with a longest span of 66 ft (20.1 m) and a deck 27 ft wide.

Who owns 330th ST over Dry Creek?

It is owned by the County Highway Agency.