US Bridges

Loc 320th ST over Black Cat Creek

FairPosted for load

Kossuth County, Iowa · 097301601 · Structure no. 000000000216121

Built
1989
36 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
64 ft
3 main spans
Daily traffic
30
2021 count
Owner
County
County Highway Agency

About this bridge

Loc 320th ST over Black Cat Creek is a wood or timber stringer/multi-beam or girder carrying Loc 320th ST over Black Cat Creek in Kossuth County, Iowa. It was built in 1989, so it is 36 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, projected to reach 30 by 2043. The structure is 64 ft (19.5 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLoc 320th ST
CrossesBlack Cat Creek
Location097301601
RouteCounty Highway 0
CountyKossuth County
StateIowa
Coordinates43.2268, -94.39412
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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 alignment7: Better than present minimum criteria
Operating rating26 US tons
Inventory rating21.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length64 ft (19.5 m)
Longest span21 ft (6.4 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2021)
Projected traffic30 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Loc 320th ST over Black Cat Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Loc 320th ST over Black Cat 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 May 2023.

How much traffic does Loc 320th ST over Black Cat Creek carry?

About 30 vehicles per day (2021 count).

How long is Loc 320th ST over Black Cat Creek?

The structure is 64 ft (19.5 m) long with a longest span of 21 ft (6.4 m) and a deck 25 ft wide.

Who owns Loc 320th ST over Black Cat Creek?

It is owned by the County Highway Agency.