US Bridges

FM - Jackson over Waterway

PoorPosted for load

Cass County, Iowa · 076361406 · Structure no. 000000000099611

Built
1985
40 years old, rebuilt 2012
Condition
Poor
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
139
2022 count
Owner
County
County Highway Agency

About this bridge

FM - Jackson over Waterway is a prestressed concrete tee beam carrying FM - Jackson over Waterway in Cass County, Iowa. It was built in 1985 and reconstructed in 2012, so it is 40 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 139 vehicles a day, projected to reach 139 by 2044. The structure is 62 ft (18.9 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesFM - Jackson
CrossesWaterway
Location076361406
RouteCounty Highway 0
StateIowa
Coordinates41.38153, -94.94809
Functional classRural Minor Collector

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 other load-capacity 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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating18.1 US tons
Inventory rating3.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length62 ft (18.9 m)
Longest span60 ft (18.3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic139 (2022)
Projected traffic139 by 2044
Trucks0%
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$713,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FM - Jackson over Waterway built?

It was built in 1985, making it 40 years old in 2025. It was reconstructed in 2012.

What condition is FM - Jackson 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 FM - Jackson over Waterway carry?

About 139 vehicles per day (2022 count).

How long is FM - Jackson over Waterway?

The structure is 62 ft (18.9 m) long with a longest span of 60 ft (18.3 m) and a deck 26 ft wide.

Who owns FM - Jackson over Waterway?

It is owned by the County Highway Agency.