US Bridges

Lopez DR over Lopez Lake

Fair

San Luis Obispo County, California · 4.8 MI NE of Orcutt RD · Structure no. 49C0354

Built
1968
57 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
317 ft
3 main spans
Daily traffic
1,857
2010 count
Owner
County
County Highway Agency

About this bridge

Lopez DR over Lopez Lake is a prestressed concrete stringer/multi-beam or girder carrying Lopez DR over Lopez Lake in San Luis Obispo County, California. It was built in 1968, so it is 57 years old, older 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 1,857 vehicles a day, roughly 2% of them trucks, projected to reach 3,258 by 2045. The structure is 317 ft (96.6 m) long and 34 ft wide. If it were closed, the detour would be 42.3 mi (68 km).

Location

Open in Google Maps
CarriesLopez DR
CrossesLopez Lake
Location4.8 MI NE of Orcutt RD
RouteCounty Highway 0
CountySan Luis Obispo County
StateCalifornia
Coordinates35.18718, -120.45856
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.2 US tons
Inventory rating23.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length317 ft (96.6 m)
Longest span104 ft (31.7 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,857 (2010)
Projected traffic3,258 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.3 mi (68 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 Lopez DR over Lopez Lake built?

It was built in 1968, making it 57 years old in 2025.

What condition is Lopez DR over Lopez Lake 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 March 2023.

How much traffic does Lopez DR over Lopez Lake carry?

About 1,857 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is Lopez DR over Lopez Lake?

The structure is 317 ft (96.6 m) long with a longest span of 104 ft (31.7 m) and a deck 34 ft wide.

Who owns Lopez DR over Lopez Lake?

It is owned by the County Highway Agency.