US Bridges

NW 70th ST over West Oak Creek (e 100)

Good

Lancaster County, Nebraska · 2.5E of Malcolm · Structure no. C005531115

Built
1991
34 years old
Condition
Good
inspected March 2023
Type
Slab
Concrete Continuous
Length
67 ft
3 main spans
Daily traffic
27
2012 count
Owner
County
County Highway Agency

About this bridge

NW 70th ST over West Oak Creek (e 100) is a concrete continuous slab carrying NW 70th ST over West Oak Creek (e 100) in Lancaster County, Nebraska. It was built in 1991, so it is 34 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 27 vehicles a day, projected to reach 46 by 2032. The structure is 67 ft (20.4 m) long and 30 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

CarriesNW 70th ST
CrossesWest Oak Creek (e 100)
Location2.5E of Malcolm
RouteCounty Highway 311
Coordinates40.909, -96.8148
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.2 US tons
Inventory rating39.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length67 ft (20.4 m)
Longest span26 ft (7.9 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27 (2012)
Projected traffic46 by 2032
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 70th ST over West Oak Creek (e 100) built?

It was built in 1991, making it 34 years old in 2025.

What condition is NW 70th ST over West Oak Creek (e 100) 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 March 2023.

How much traffic does NW 70th ST over West Oak Creek (e 100) carry?

About 27 vehicles per day (2012 count).

How long is NW 70th ST over West Oak Creek (e 100)?

The structure is 67 ft (20.4 m) long with a longest span of 26 ft (7.9 m) and a deck 30 ft wide.

Who owns NW 70th ST over West Oak Creek (e 100)?

It is owned by the County Highway Agency.