US Bridges

Santa Lucia Road over Graves Creek

Good

San Luis Obispo County, California · At Liano RD · Structure no. 49C0494

Built
2023
2 years old
Condition
Good
inspected October 2024
Type
Slab
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
1,500
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Santa Lucia Road over Graves Creek is a prestressed concrete slab carrying Santa Lucia Road over Graves Creek in San Luis Obispo County, California. It was built in 2023, so it is 2 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,500 vehicles a day, roughly 3% of them trucks, projected to reach 2,000 by 2043. The structure is 75 ft (22.9 m) long and 36 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesSanta Lucia Road
CrossesGraves Creek
LocationAt Liano RD
RouteCity Street 0
CountySan Luis Obispo County
StateCalifornia
Coordinates35.47497, -120.70756
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length75 ft (22.9 m)
Longest span71 ft (21.5 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2023)
Projected traffic2,000 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Santa Lucia Road over Graves Creek built?

It was built in 2023, making it 2 years old in 2025.

What condition is Santa Lucia Road over Graves Creek 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 October 2024.

How much traffic does Santa Lucia Road over Graves Creek carry?

About 1,500 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Santa Lucia Road over Graves Creek?

The structure is 75 ft (22.9 m) long with a longest span of 71 ft (21.5 m) and a deck 36 ft wide.

Who owns Santa Lucia Road over Graves Creek?

It is owned by the City or Municipal Highway Agency.