US Bridges

NB-US77 over Rock Creek Overflow

Good

Lancaster County, Nebraska · 1S Ceresco · Structure no. S077 08066R

Built
1994
31 years old
Condition
Good
inspected February 2025
Type
Slab
Concrete Continuous
Length
103 ft
3 main spans
Daily traffic
7,890
2018 count
Owner
State
State Highway Agency

About this bridge

NB-US77 over Rock Creek Overflow is a concrete continuous slab carrying NB-US77 over Rock Creek Overflow in Lancaster County, Nebraska. It was built in 1994, so it is 31 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 7,890 vehicles a day, roughly 12% of them trucks, projected to reach 11,835 by 2038. The structure is 103 ft (31.4 m) long and 41 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

CarriesNB-US77
CrossesRock Creek Overflow
Location1S Ceresco
RouteU.S. Route 77
Coordinates41.0396, -96.6397
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.4 US tons
Inventory rating54 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length103 ft (31.4 m)
Longest span40 ft (12.2 m)
Deck width41 ft (12.6 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,890 (2018)
Projected traffic11,835 by 2038
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway 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 NB-US77 over Rock Creek Overflow built?

It was built in 1994, making it 31 years old in 2025.

What condition is NB-US77 over Rock Creek Overflow 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 February 2025.

How much traffic does NB-US77 over Rock Creek Overflow carry?

About 7,890 vehicles per day (2018 count), of which roughly 12% are trucks.

How long is NB-US77 over Rock Creek Overflow?

The structure is 103 ft (31.4 m) long with a longest span of 40 ft (12.2 m) and a deck 41 ft wide.

Who owns NB-US77 over Rock Creek Overflow?

It is owned by the State Highway Agency.