US Bridges

CO RD 408/COL 7309 over Nppid Canal

Poor

Dawson County, Nebraska · 1N US30 Lincoln Cl · Structure no. C002430115

Built
1976
49 years old
Condition
Poor
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
70
1998 count
Owner
Local
Other Local Agency

About this bridge

CO RD 408/COL 7309 over Nppid Canal is a prestressed concrete tee beam carrying CO RD 408/COL 7309 over Nppid Canal in Dawson County, Nebraska. It was built in 1976, so it is 49 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 70 vehicles a day, projected to reach 70 by 2033. The structure is 40 ft (12.2 m) long and 30 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

Open in Google Maps
CarriesCO RD 408/COL 7309
CrossesNppid Canal
Location1N US30 Lincoln Cl
RouteCounty Highway 7309
CountyDawson County
StateNebraska
Coordinates40.9658, -100.2243
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
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.5 US tons
Inventory rating35.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span38 ft (11.6 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (1998)
Projected traffic70 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CO RD 408/COL 7309 over Nppid Canal built?

It was built in 1976, making it 49 years old in 2025.

What condition is CO RD 408/COL 7309 over Nppid 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 CO RD 408/COL 7309 over Nppid Canal carry?

About 70 vehicles per day (1998 count).

How long is CO RD 408/COL 7309 over Nppid Canal?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.6 m) and a deck 30 ft wide.

Who owns CO RD 408/COL 7309 over Nppid Canal?

It is owned by the Other Local Agency.