US Bridges

400th Ave over Loup River Canal

Poor

Platte County, Nebraska · .5N 2W of Monroe · Structure no. C007102110

Built
1935
90 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
135 ft
4 main spans
Daily traffic
50
2003 count
Owner
Local
Other Local Agency

About this bridge

400th Ave over Loup River Canal is a steel stringer/multi-beam or girder carrying 400th Ave over Loup River Canal in Platte County, Nebraska. It was built in 1935, so it is 90 years old, older than the Nebraska average of 47.1 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 50 vehicles a day, projected to reach 72 by 2033. The structure is 135 ft (41.1 m) long and 16 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

Open in Google Maps
Carries400th Ave
CrossesLoup River Canal
Location.5N 2W of Monroe
RouteCounty Highway 21
CountyPlatte County
StateNebraska
Coordinates41.4831, -97.638
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; extensive scour has occurred
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.5 US tons
Inventory rating27.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length135 ft (41.1 m)
Longest span51 ft (15.5 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2003)
Projected traffic72 by 2033
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was 400th Ave over Loup River Canal built?

It was built in 1935, making it 90 years old in 2025.

What condition is 400th Ave over Loup River Canal 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 October 2024.

How much traffic does 400th Ave over Loup River Canal carry?

About 50 vehicles per day (2003 count).

How long is 400th Ave over Loup River Canal?

The structure is 135 ft (41.1 m) long with a longest span of 51 ft (15.5 m) and a deck 16 ft wide.

Who owns 400th Ave over Loup River Canal?

It is owned by the Other Local Agency.