US Bridges

300th ST (lwc) over Crooked CR

Fair

Cedar County, Iowa · 079020807 · Structure no. 000000000101731

Built
1998
27 years old
Condition
Fair
inspected May 2023
Type
Culvert
Steel
Length
45 ft
3 main spans
Daily traffic
11
2021 count
Owner
County
County Highway Agency

About this bridge

300th ST (lwc) over Crooked CR is a steel culvert carrying 300th ST (lwc) over Crooked CR in Cedar County, Iowa. It was built in 1998, so it is 27 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 11 vehicles a day, projected to reach 11 by 2043. The structure is 45 ft (13.7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries300th ST (lwc)
CrossesCrooked CR
Location079020807
RouteCounty Highway 0
CountyCedar County
StateIowa
Coordinates41.65856, -91.10139
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span4 ft (1.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2021)
Projected traffic11 by 2043
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 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 300th ST (lwc) over Crooked CR built?

It was built in 1998, making it 27 years old in 2025.

What condition is 300th ST (lwc) over Crooked CR 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 300th ST (lwc) over Crooked CR carry?

About 11 vehicles per day (2021 count).

How long is 300th ST (lwc) over Crooked CR?

The structure is 45 ft (13.7 m) long with a longest span of 4 ft (1.2 m).

Who owns 300th ST (lwc) over Crooked CR?

It is owned by the County Highway Agency.