US Bridges

FM - 710th over Waterway

FairPosted for load

Cass County, Iowa · 075350102 · Structure no. 000000000098030

Built
1900
125 years old
Condition
Fair
inspected February 2024
Type
Truss - Thru
Steel
Length
93 ft
1 main span
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

FM - 710th over Waterway is a steel truss - thru carrying FM - 710th over Waterway in Cass County, Iowa. It was built in 1900, so it is 125 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 15 vehicles a day, projected to reach 15 by 2044. The structure is 93 ft (28.3 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFM - 710th
CrossesWaterway
Location075350102
RouteCounty Highway 0
CountyCass County
StateIowa
Coordinates41.3167, -94.83466
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating29.9 US tons
Inventory rating18.8 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length93 ft (28.3 m)
Longest span90 ft (27.4 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic15 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$970,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FM - 710th over Waterway built?

It was built in 1900, making it 125 years old in 2025.

What condition is FM - 710th over Waterway 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 February 2024.

How much traffic does FM - 710th over Waterway carry?

About 15 vehicles per day (2022 count).

How long is FM - 710th over Waterway?

The structure is 93 ft (28.3 m) long with a longest span of 90 ft (27.4 m) and a deck 21 ft wide.

Who owns FM - 710th over Waterway?

It is owned by the County Highway Agency.