County of San Luis Obispo Public Works

County of San Luis Obispo Public Works We provide traffic, water, wastewater, engineering services and more to our SLO County residents!

The Public Works Department provides public services related to the safe and efficient movement of traffic on the 1349 miles of County maintained roadways; engineering and surveying review of proposed land development; administration and operation of various water and waste water wholesale and retail facilities, including the Nacimiento Water Supply and Los Osos Waste Water projects; long term mas

ter water planning; franchise administration for the unincorporated areas; facility planning, design and construction management of all County building projects; maintenance and custodial services for all County occupied facilities.

Traffic Delays Expected During Repairs to Santa Rita RoadCayucos and Templeton – Drivers can expect possible delays on S...
06/12/2026

Traffic Delays Expected During Repairs to Santa Rita Road

Cayucos and Templeton – Drivers can expect possible delays on Santa Rita Road as the County of San Luis Obispo Department of Public Works will be performing road repairs from June 15 through June 26 on Santa Rita Road. During this work, heavy trucks will be hauling material along the route, and motorists may experience traffic delays of up to 15 minutes near the project site, located approximately four miles west of the Vineyard Drive intersection.

Construction activities and traffic delays are scheduled on weekdays between 7:00 a.m. and 4:30 p.m., from June 15 through June 26, 2026.

This work is part of the County’s ongoing storm recovery program. Severe storms in early 2023 and 2024 caused significant road damage, including partial lane loss, necessitating these repairs.

Motorists are advised to adjust their travel plans accordingly and allow extra time for traffic delays. Please contact Kyle Whelan at [email protected] or (805) 781-5211 with any questions or comments.

For more information, visit: https://www.slocounty.ca.gov/departments/public-works/department-news/2026/traffic-delays-expected-during-repairs-to-santa-rita-road

06/10/2026

Summer is here and here’s a reminder that invasive mussels can wreak havoc on boaters, the environment, and our water distribution infrastructure.

Invasive mussels range in size from microscopic larvae to adults approximately the size of a dime to a quarter.
These invasive mussels can produce millions of offspring during a single spawning season.
Adult mussels consume large amounts of plankton, a critical component of the aquatic food web, and can filter up to one liter of water per day.
Adult mussels can survive out of water for extended periods, ranging from one week to as long as 30 days under favorable conditions.

05/20/2026

Ninety buildings. Every floor, every restroom, every public space — maintained by a small team that works late into the night and into the early morning hours. Public Works Director John Diodati and Custodial Manager Jason Coy talk about some of the work the custodial division does and its role in keeping county spaces operating smoothly for staff and the public.

05/20/2026

We continue to celebrate National Public Works Week this week. This year's theme Rooted in Service, Powered by Community is fitting. Our staff feels strongly about serving the community in which they live. Here's a peak at what we do.

PASO ROBLES – The County of San Luis Obispo Public Works and Souza Construction, Inc., have started work on a permanent ...
05/19/2026

PASO ROBLES – The County of San Luis Obispo Public Works and Souza Construction, Inc., have started work on a permanent two-lane bridge on Creston Road at Quail Creek (near South El Pomar Road) to replace the existing storm-damaged bridge. The work will require a full closure of Creston Road at South El Pomar Road through Creston Ridge Lane.

A traffic detour will be in place from June 1 through September 4, 2026, with partial closures before and after as needed. The expected detour for most residents and visitors to the area is via El Pomar Drive to Cripple Creek Road. Construction is expected to be completed in winter 2026.

For more information, visit: https://www.slocounty.ca.gov/departments/public-works/department-news/2026/construction-begins-and-a-detour-is-scheduled-on-creston-road-bridge-in-paso-robles

Images: 2023 Storm Damage at Quail Creek Bridge Detour (first photo) and existing temporary repairs at Quail Creek Bridge (second photo)

It's National Public Works Week, a time when we recognize our staff and share the work they do for the community. This y...
05/18/2026

It's National Public Works Week, a time when we recognize our staff and share the work they do for the community. This year's theme is Rooted in Service, Powered by Community. And speaking of community, you can catch us at Public Works Night at the Downtown SLO Farmers' Market from 6-9 p.m. on Thursday, May 21. We will be set up on Chorro Street at the corner with Marsh Street and we will have some of the equipment used by our Roads Division on display. And we will have a photo booth! You can also learn about our Water Quality and Wastewater Utilities divisions and get information about jobs in Public Works from our HR team.

Are you free on May 16 from 9 a.m. to noon to perform a good deed for the community? Volunteer with us and learn about t...
05/01/2026

Are you free on May 16 from 9 a.m. to noon to perform a good deed for the community? Volunteer with us and learn about the County’s maintenance activities in the AG Creek Flood Control Zone. Link in story.

Are you free on May 16 from 9 a.m. to noon to perform a good deed for the community? Volunteer with us and learn about t...
05/01/2026

Are you free on May 16 from 9 a.m. to noon to perform a good deed for the community? Volunteer with us and learn about the County's maintenance activities in the AG Creek Flood Control Zone. Sign up here: https://arcg.is/15DGmC2

PASO ROBLES – The County of San Luis Obispo Public Works and Granite Construction, Inc. have started construction on a p...
04/27/2026

PASO ROBLES – The County of San Luis Obispo Public Works and Granite Construction, Inc. have started construction on a permanent two-lane bridge on Chimney Rock Road at Franklin Creek (near Fawn Lane) that will replace the existing one-lane steel bridge. A traffic detour will be in place with a strict 15-mph speed limit. Construction is expected to be completed in winter 2026.

For more information, visit: https://www.slocounty.ca.gov/departments/public-works/department-news/2026/chimney-rock-road-bridge-construction-begins

04/24/2026

It’s National Work Zone Awareness Week and it’s a reminder to stay focused and look out
for our roadway family. Every roadway worker deserves a safe shift.




Address

976 Osos Street, Room 206
San Luis Obispo, CA
93408

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

+18057815252

Website

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