US Bridges

State Route 86 SB over Lone Tree Wash

Fair

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

Built
1997
28 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
100 ft
4 main spans
Daily traffic
7,350
2020 count
Owner
State
State Highway Agency

About this bridge

State Route 86 SB over Lone Tree Wash is a concrete continuous slab carrying State Route 86 SB over Lone Tree Wash in Imperial County, California. It was built in 1997, so it is 28 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 7,350 vehicles a day, roughly 22% of them trucks, projected to reach 8,875 by 2046. The structure is 100 ft (30.5 m) long and 43 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

CarriesState Route 86 SB
CrossesLone Tree Wash
Location11-IMP-086-R37.23
RouteState Highway 86
Coordinates33.08573, -115.76368
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to 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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length100 ft (30.5 m)
Longest span25 ft (7.6 m)
Deck width43 ft (13 m)
Roadway width39 ft (11.9 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 closed62.1 mi (100 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 SB over Lone Tree Wash built?

It was built in 1997, making it 28 years old in 2025.

What condition is State Route 86 SB over Lone Tree Wash in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

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

The structure is 100 ft (30.5 m) long with a longest span of 25 ft (7.6 m) and a deck 43 ft wide.

Who owns State Route 86 SB over Lone Tree Wash?

It is owned by the State Highway Agency.