US Bridges

Eight Mile Road over Bishop Canal

Fair

San Joaquin County, California · W of Rio Blanco RD · Structure no. 29C0114

Built
1989
36 years old
Condition
Fair
inspected January 2024
Type
Movable - Swing
Steel
Length
320 ft
2 main spans
Daily traffic
1,000
2015 count
Owner
County
County Highway Agency

About this bridge

Eight Mile Road over Bishop Canal is a steel movable - swing carrying Eight Mile Road over Bishop Canal in San Joaquin County, California. It was built in 1989, so it is 36 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 6 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 1,000 vehicles a day, roughly 3% of them trucks, projected to reach 5,379 by 2042. The structure is 320 ft (97.5 m) long and 39 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesEight Mile Road
CrossesBishop Canal
LocationW of Rio Blanco RD
RouteCounty Highway 0
CountySan Joaquin County
StateCalifornia
Coordinates38.05832, -121.41899
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.5 US tons
Inventory rating37.1 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+8 approach)
Design loadHS 20 + Mod
Structure length320 ft (97.5 m)
Longest span46 ft (14 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2015)
Projected traffic5,379 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Eight Mile Road over Bishop Canal built?

It was built in 1989, making it 36 years old in 2025.

What condition is Eight Mile Road over Bishop Canal 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 Eight Mile Road over Bishop Canal carry?

About 1,000 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Eight Mile Road over Bishop Canal?

The structure is 320 ft (97.5 m) long with a longest span of 46 ft (14 m) and a deck 39 ft wide.

Who owns Eight Mile Road over Bishop Canal?

It is owned by the County Highway Agency.