US Bridges

Local over Clarks Creek

PoorPosted for load

Cass County, Iowa · 074373204 · Structure no. 000000000097690

Built
1966
59 years old, rebuilt 2005
Condition
Poor
inspected March 2024
Type
Truss - Thru
Steel
Length
71 ft
1 main span
Daily traffic
5
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Clarks Creek is a steel truss - thru carrying Local over Clarks Creek in Cass County, Iowa. It was built in 1966 and reconstructed in 2005, so it is 59 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 5 vehicles a day, projected to reach 5 by 2044. The structure is 71 ft (21.6 m) long and 21 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLocal
CrossesClarks Creek
Location074373204
RouteCounty Highway 0
StateIowa
Coordinates41.16993, -95.12781
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating13.4 US tons
Inventory rating4.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length71 ft (21.6 m)
Longest span70 ft (21.3 m)
Deck width21 ft (6.4 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2022)
Projected traffic5 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$809,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Clarks Creek built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2005.

What condition is Local over Clarks Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does Local over Clarks Creek carry?

About 5 vehicles per day (2022 count).

How long is Local over Clarks Creek?

The structure is 71 ft (21.6 m) long with a longest span of 70 ft (21.3 m) and a deck 21 ft wide.

Who owns Local over Clarks Creek?

It is owned by the County Highway Agency.