US Bridges

State Route 86 NB over Lone Tree Wash

Good

Imperial County, California · 11-IMP-086-R37.23 · Structure no. 58 0032R

Built
1947
78 years old
Condition
Good
inspected January 2024
Type
Slab
Concrete Continuous
Length
98 ft
4 main spans
Daily traffic
7,350
2020 count
Owner
State
State Highway Agency

About this bridge

State Route 86 NB over Lone Tree Wash is a concrete continuous slab carrying State Route 86 NB over Lone Tree Wash in Imperial County, California. It was built in 1947, so it is 78 years old, older than the California average of 54.8 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 7,350 vehicles a day, roughly 22% of them trucks, projected to reach 8,875 by 2046. The structure is 98 ft (29.9 m) long and 45 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesState Route 86 NB
CrossesLone Tree Wash
Location11-IMP-086-R37.23
RouteState Highway 86
Coordinates33.08598, -115.76339
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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating60.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length98 ft (29.9 m)
Longest span24 ft (7.3 m)
Deck width45 ft (13.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,350 (2020)
Projected traffic8,875 by 2046
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 State Route 86 NB over Lone Tree Wash built?

It was built in 1947, making it 78 years old in 2025.

What condition is State Route 86 NB over Lone Tree Wash 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 January 2024.

How much traffic does State Route 86 NB over Lone Tree Wash carry?

About 7,350 vehicles per day (2020 count), of which roughly 22% are trucks.

How long is State Route 86 NB over Lone Tree Wash?

The structure is 98 ft (29.9 m) long with a longest span of 24 ft (7.3 m) and a deck 45 ft wide.

Who owns State Route 86 NB over Lone Tree Wash?

It is owned by the State Highway Agency.