US Bridges

LOCAL/730th LN over Waterway

PoorPosted for load

Cass County, Iowa · 077340504 · Structure no. 000000000100211

Built
1995
30 years old
Condition
Poor
inspected March 2024
Type
Slab
Steel Continuous
Length
50 ft
2 main spans
Daily traffic
5
2022 count
Owner
County
County Highway Agency

About this bridge

LOCAL/730th LN over Waterway is a steel continuous slab carrying LOCAL/730th LN over Waterway in Cass County, Iowa. It was built in 1995, so it is 30 years old, younger 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 other load-capacity restriction.

It carries about 5 vehicles a day, projected to reach 5 by 2044. The structure is 50 ft (15.2 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLOCAL/730th LN
CrossesWaterway
Location077340504
RouteCounty Highway 0
CountyCass County
StateIowa
Coordinates41.49181, -94.79651
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.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating48.2 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialSteel Continuous
DeckWood or timber
Main spans2
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span25 ft (7.6 m)
Deck width23 ft (6.9 m)
Roadway width23 ft (6.9 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 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 LOCAL/730th LN over Waterway built?

It was built in 1995, making it 30 years old in 2025.

What condition is LOCAL/730th LN over Waterway 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/730th LN over Waterway carry?

About 5 vehicles per day (2022 count).

How long is LOCAL/730th LN over Waterway?

The structure is 50 ft (15.2 m) long with a longest span of 25 ft (7.6 m) and a deck 23 ft wide.

Who owns LOCAL/730th LN over Waterway?

It is owned by the County Highway Agency.