US Bridges

Lopez DR over Lopez Lake Spillway

Fair

San Luis Obispo County, California · 2.64 MI N/E Orcutt RD · Structure no. 49C0353

Built
1968
57 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
72 ft
1 main span
Daily traffic
2,728
2010 count
Owner
County
County Highway Agency

About this bridge

Lopez DR over Lopez Lake Spillway is a prestressed concrete stringer/multi-beam or girder carrying Lopez DR over Lopez Lake Spillway 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 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 2,728 vehicles a day, roughly 2% of them trucks, projected to reach 3,258 by 2045. The structure is 72 ft (21.9 m) long and 34 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

Open in Google Maps
CarriesLopez DR
CrossesLopez Lake Spillway
Location2.64 MI N/E Orcutt RD
RouteCounty Highway 0
CountySan Luis Obispo County
StateCalifornia
Coordinates35.18845, -120.48978
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating45.3 US tons
Inventory rating23.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length72 ft (21.9 m)
Longest span65 ft (19.9 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,728 (2010)
Projected traffic3,258 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 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 Spillway built?

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

What condition is Lopez DR over Lopez Lake Spillway 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 July 2023.

How much traffic does Lopez DR over Lopez Lake Spillway carry?

About 2,728 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is Lopez DR over Lopez Lake Spillway?

The structure is 72 ft (21.9 m) long with a longest span of 65 ft (19.9 m) and a deck 34 ft wide.

Who owns Lopez DR over Lopez Lake Spillway?

It is owned by the County Highway Agency.