US Bridges

Local - Jasper over Nishnabotna River

PoorPosted for load

Cass County, Iowa · 076372303 · Structure no. 000000000099990

Built
1959
66 years old
Condition
Poor
inspected March 2024
Type
Truss - Thru
Steel
Length
235 ft
1 main span
Daily traffic
46
2022 count
Owner
County
County Highway Agency

About this bridge

Local - Jasper over Nishnabotna River is a steel truss - thru carrying Local - Jasper over Nishnabotna River in Cass County, Iowa. It was built in 1959, so it is 66 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 46 vehicles a day, projected to reach 46 by 2044. The structure is 235 ft (71.6 m) long and 22 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesLocal - Jasper
CrossesNishnabotna River
Location076372303
RouteCounty Highway 0
CountyCass County
StateIowa
Coordinates41.37511, -95.06677
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, 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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32.1 US tons
Inventory rating16.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadUnknown
Structure length235 ft (71.6 m)
Longest span120 ft (36.6 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deck11 ft (3.4 m)

Traffic and service

Average daily traffic46 (2022)
Projected traffic46 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$2.1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Local - Jasper over Nishnabotna River built?

It was built in 1959, making it 66 years old in 2025.

What condition is Local - Jasper over Nishnabotna River 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 - Jasper over Nishnabotna River carry?

About 46 vehicles per day (2022 count).

How long is Local - Jasper over Nishnabotna River?

The structure is 235 ft (71.6 m) long with a longest span of 120 ft (36.6 m) and a deck 22 ft wide.

Who owns Local - Jasper over Nishnabotna River?

It is owned by the County Highway Agency.