US Bridges

Highland DR over Brizzolara Creek

Good

San Luis Obispo County, California · Cal State Polytechnic Uni · Structure no. 49I0001

Built
1972
53 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete Continuous
Length
44 ft
3 main spans
Daily traffic
8,800
2008 count
Owner
State
Other State Agency

About this bridge

Highland DR over Brizzolara Creek is a concrete continuous culvert carrying Highland DR over Brizzolara Creek in San Luis Obispo County, California. It was built in 1972, so it is 53 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,800 vehicles a day, roughly 1% of them trucks, projected to reach 6,412 by 2044. The structure is 44 ft (13.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesHighland DR
CrossesBrizzolara Creek
LocationCal State Polytechnic Uni
RouteState Lands Road 0
Coordinates35.30244, -120.66726
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length44 ft (13.3 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck13 ft (3.8 m)

Traffic and service

Average daily traffic8,800 (2008)
Projected traffic6,412 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byOther State 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 Highland DR over Brizzolara Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Highland DR over Brizzolara 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 April 2024.

How much traffic does Highland DR over Brizzolara Creek carry?

About 8,800 vehicles per day (2008 count), of which roughly 1% are trucks.

How long is Highland DR over Brizzolara Creek?

The structure is 44 ft (13.3 m) long with a longest span of 12 ft (3.7 m).

Who owns Highland DR over Brizzolara Creek?

It is owned by the Other State Agency.