US Bridges

Conestoga Avenue over Flat Creek

Good

Adams County, Nebraska · 15780 S. Conestoga Ave. · Structure no. C000102105

Built
2011
14 years old
Condition
Good
inspected September 2021
Type
Stringer/Multi-beam or Girder
Concrete
Length
53 ft
2 main spans
Daily traffic
20
2003 count
Owner
County
County Highway Agency

About this bridge

Conestoga Avenue over Flat Creek is a concrete stringer/multi-beam or girder carrying Conestoga Avenue over Flat Creek in Adams County, Nebraska. It was built in 2011, so it is 14 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20 vehicles a day, projected to reach 34 by 2042. The structure is 53 ft (16.2 m) long and 29 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

Open in Google Maps
CarriesConestoga Avenue
CrossesFlat Creek
Location15780 S. Conestoga Ave.
RouteCounty Highway 21
CountyAdams County
StateNebraska
Coordinates40.3914, -98.5342
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.5 US tons
Inventory rating48.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHL 93
Structure length53 ft (16.2 m)
Longest span30 ft (9.1 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2003)
Projected traffic34 by 2042
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

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Conestoga Avenue over Flat Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is Conestoga Avenue over Flat Creek 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 September 2021.

How much traffic does Conestoga Avenue over Flat Creek carry?

About 20 vehicles per day (2003 count).

How long is Conestoga Avenue over Flat Creek?

The structure is 53 ft (16.2 m) long with a longest span of 30 ft (9.1 m) and a deck 29 ft wide.

Who owns Conestoga Avenue over Flat Creek?

It is owned by the County Highway Agency.