US Bridges

Local - 635th over Troublesome Creek

Poor

Cass County, Iowa · 076360301 · Structure no. 000000000099465

Built
1979
46 years old
Condition
Poor
inspected March 2024
Type
Truss - Thru
Steel
Length
94 ft
1 main span
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

Local - 635th over Troublesome Creek is a steel truss - thru carrying Local - 635th over Troublesome Creek in Cass County, Iowa. It was built in 1979, so it is 46 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.

It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 30 by 2044. The structure is 94 ft (28.7 m) long and 21 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesLocal - 635th
CrossesTroublesome Creek
Location076360301
RouteCounty Highway 0
StateIowa
Coordinates41.41534, -94.97444
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating38.5 US tons
Inventory rating27 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length94 ft (28.7 m)
Longest span90 ft (27.4 m)
Deck width21 ft (6.4 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$950,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Local - 635th over Troublesome Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Local - 635th over Troublesome 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 - 635th over Troublesome Creek carry?

About 30 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Local - 635th over Troublesome Creek?

The structure is 94 ft (28.7 m) long with a longest span of 90 ft (27.4 m) and a deck 21 ft wide.

Who owns Local - 635th over Troublesome Creek?

It is owned by the County Highway Agency.