US Bridges

N15 over Dry Branch Tributary

Good

Jefferson County, Nebraska · 6S Fairbury · Structure no. S015 00307

Built
2009
16 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
108 ft
1 main span
Daily traffic
1,115
2018 count
Owner
State
State Highway Agency

About this bridge

N15 over Dry Branch Tributary is a prestressed concrete stringer/multi-beam or girder carrying N15 over Dry Branch Tributary in Jefferson County, Nebraska. It was built in 2009, so it is 16 years old, younger than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,115 vehicles a day, roughly 22% of them trucks, projected to reach 1,450 by 2038. The structure is 108 ft (32.9 m) long and 39 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

CarriesN15
CrossesDry Branch Tributary
Location6S Fairbury
RouteState Highway 15
Coordinates40.0454, -97.1709
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.3 US tons
Inventory rating33.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length108 ft (32.9 m)
Longest span105 ft (32 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,115 (2018)
Projected traffic1,450 by 2038
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was N15 over Dry Branch Tributary built?

It was built in 2009, making it 16 years old in 2025.

What condition is N15 over Dry Branch Tributary in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does N15 over Dry Branch Tributary carry?

About 1,115 vehicles per day (2018 count), of which roughly 22% are trucks.

How long is N15 over Dry Branch Tributary?

The structure is 108 ft (32.9 m) long with a longest span of 105 ft (32 m) and a deck 39 ft wide.

Who owns N15 over Dry Branch Tributary?

It is owned by the State Highway Agency.