Yard Drainage in Templeton

On Templeton lots we stop water at the trouble spots: reshape grade so it falls away from the house, bury downspout lines out to planted basins, build cobble channels and swales, open up solid paving, and lock cut banks before the first big storm. Templeton is unincorporated San Luis Obispo County, which means County Chapter 22.52 grading and drainage rules apply to private yards, while the Templeton Community Services District runs a separate stormwater program for District facilities and publishes homeowner tips. Call 805-712-4440 or use the contact form to schedule a walk-through.

Templeton Rules in One Table

What Goes Wrong on Templeton Lots

Templeton sits on the Salinas River corridor between Paso Robles and Atascadero. Winter storms push sheet flow across vineyard rows and hillside pads into gutters and, eventually, creeks. On a house lot the usual failures are simple: mulch and soil banked against siding, a gutter that dumps at one corner, an uphill neighbor’s sheet flow with no interceptor, a patio poured flat, or irrigation that keeps a walk wet long after the timer stops.

The TCSD Stormwater page borrows the EPA’s warning: runoff picks up debris, chemicals and dirt on driveways and lawns, then enters a storm sewer or flows straight to a stream, and that water is not treated. Holding roof and yard water in planting beds, rain gardens and rock basins is the practical fix for most homes here.

Because Templeton is not a city, there is no separate municipal grading ordinance. Chapter 22.52 of the County Code is the rulebook, and County Planning & Building plus Public Works are the counters you deal with. That is different from Atascadero or Paso Robles, where city codes add another layer.

County Grading Thresholds That Matter

The County’s major grading permit page is plain: a grading permit is typically needed when a project changes topography by removing or depositing more than 50 cubic yards of soil. Major grading typically means 5,000 cubic yards of earthwork or more, or earthwork on terrain with slopes of 10 percent or greater at any point. Many Templeton hillside pads already sit above that 10% line, so even a modest cut for a patio or turnaround can land in the major category.

Except on Agriculture-category parcels, disturbing 1.0 acre or more generally also needs a land use permit, and disturbing more than 1.0 acre means enrolling in California’s Construction General Permit for stormwater discharges. Submittals usually include grading and drainage drawings, an erosion and sediment control plan, and a geotechnical soils report from a licensed civil or geotechnical engineer. Planning & Building, Public Works and Cal Fire each look at major grading in turn.

Section 22.52.050 adds an important catch: even when the work is exempt from a grading permit, an erosion and sedimentation control plan, a drainage plan, or a stormwater pollution prevention plan can still be required. We call that out on the first visit so the bid includes the right paperwork.

Drainage Plan Triggers Under 22.52.110

County Code Section 22.52.110 says a drainage plan must be prepared and sent to the Public Works Director for approval when a project does any of the following:

• Raises or lowers runoff volume or velocity leaving any point of the site compared with conditions before disturbance
• Clears or grades more than 20,000 square feet down to bare soil
• Creates more than 20,000 square feet of impervious surface
• Sits in a spot that ponds because of soil or topography
• Is in an area Public Works or a building inspector has already flagged for flooding or erosion history
• Lies in a Flood Hazard (FH) combining designation
• Overlies a known high recharge area identified by Public Works
• Disturbs ground or places structures within 100 feet of the top of bank of any watercourse shown as a blue line on the current USGS 7.5-minute quadrangle
• Is hillside development on slopes steeper than 10 percent
• Could, by changing existing drainage, create an on-site erosion or inundation hazard or change off-site flow direction, velocity or volume

Crop production, grazing and certain agricultural accessory structures can be exempt, and Public Works can waive a plan in other cases. For a house lot, a new patio and driveway often change runoff enough to trip the first test, and lots near Toad Creek, Bethel Creek or other blue-line streams pick up the 100-foot setback. Plans must be clear and to scale; the Public Works Director may require a registered civil engineer to prepare them. When that is the path, we work to the engineer’s sheet rather than improvising in the field.

Templeton CSD Stormwater Program

The Templeton Community Services District Stormwater page describes a Stormwater Management Program written to cut pollution from runoff at District facilities. Each year TCSD publishes a Program Effectiveness Assessment and Improvement Plan (PEAIP) annual report. That program is about District operations, parks and facilities; it does not replace County grading or drainage permits on private lots.

TCSD still matters to homeowners. The page reminds residents that stormwater in a drain is untreated, links to County Public Works Flood Control stormwater resources and the Upper Salinas-Las Tablas Resource Conservation District, and asks people to report illegal dumping at 805-781-5544. Its headline to residents is “You are the solution to Stormwater Pollution.” On our jobs that means containing saw-cut slurry and wash water, keeping fertilizer and mulch out of gutters, and finishing with outlets that empty into planted ground rather than the street.

Blue-Line Creeks and Neighbor Flows

Section 22.52.110 treats land within 100 feet of the top of bank of any USGS blue-line watercourse as a drainage-plan trigger whenever you disturb soil or place structures there. In the Templeton area that can include segments of Toad Creek, Bethel Creek and other mapped drainages that cross or border residential parcels. We measure from the top of bank on the ground, not from a guess on a phone map, and we confirm the line with County staff before design locks in.

Off-site flow is the other common Templeton issue: vineyard or hillside runoff that arrives at the uphill property line. A drainage plan that only looks inside the fence line misses it. We map the arrival point, size an interceptor swale or gravel trench, and make sure the outlet does not simply shift the problem onto the next lot downstream.

Irrigation, Hardscape and Winter Timing

Overspray onto walks and streets wastes water and keeps hardscape slick. TCSD posts Irrigation & Landscaping guidance and water conservation rebate programs for District customers. Our Templeton irrigation page covers controllers, drip and hydrozones. On a drainage visit we also hunt for heads that hit paving and for low spots that stay wet from irrigation alone.

County guidance on major grading notes that erosion and sediment control belong in the package with the grading and drainage drawings. Practically, that means finishing cut banks with mulch, seed or an interceptor before October storms, rather than leaving bare soil through winter. We sequence Templeton work so outlets and planting are in place before the wet season when the calendar allows.

Hardscape Choices That Help Drainage

Solid concrete sheds every drop to the nearest low point. On Templeton lots we often replace a slab edge with open-joint pavers on an open-graded base, or with decomposed granite and gravel that accept roof and sheet flow. A short segmental wall with drain rock behind it can hold a cut without sending silt into the street. Those choices show up on our Templeton hardscape page and pair with the drainage layout so the yard works as one system.

Our Sequence on a Templeton Drainage Job

First we walk the lot in the rain or right after, mark entry and exit points, and note any blue-line or slope triggers. Next we sketch finished grades, downspout routes, swale or dry-creek alignments, receiving beds, and paving that should open up. If a County drainage plan or grading permit is in play, we pause for the engineer and the Public Works Director before construction. Then we build, water-test every outlet, and leave you with a simple maintenance note (clear pop-ups, refresh mulch, watch the first two storms).

Paso Robles Landscaping is a landscape contractor (CSLB #986950). We are not civil engineers or County inspectors. Moving foundations, leaning walls and active slope failures belong with a licensed engineer; once that plan exists, we install the landscape and drainage pieces to match it. For bank work, see retaining walls in Templeton.

What We Build for Templeton Drainage

Choose a single fix or a whole-yard plan:

• Tracing flow paths on a wet day so we know where water arrives, stalls and exits
• Reshaping beds and lawn so finished grade carries water off the foundation
• Solid underground leaders from each downspout to a planted basin or pop-up emitter
• Rain gardens and bioswales with non-invasive, drought-tolerant plantings
• Rock-lined dry channels that slow sheet flow across the yard
• Open-joint pavers, gravel or decomposed granite in place of unbroken slabs
• Seeding, mulch and interceptor swales on cut banks before the wet months
• Short retaining walls with drain rock and daylighted outlets
• Sprinkler and drip corrections so irrigation stops hitting paving

Keep Reading on Templeton Projects

Related Templeton and nearby pages:

• Hardscape in Templeton
• Patios in Templeton
• Concrete driveways and walkways in Templeton
• Irrigation in Templeton
• Retaining walls in Templeton
• Yard drainage in Paso Robles
• Yard drainage in Atascadero
• Yard drainage in San Luis Obispo
• Yard drainage in Avila Beach
• Yard drainage in Morro Bay
• Yard drainage in Cayucos
• Yard drainage in Grover Beach
• Yard drainage in Oceano
• Landscaping in Templeton
• Paso Robles
• Atascadero

Full town list: our San Luis Obispo County service area page.

Frequently Asked Questions

Is a County drainage plan required for Templeton yard work?

It is when the project changes how runoff leaves the lot, adds a large patio or drive, sits on slopes steeper than 10%, or is within 100 feet of a blue-line watercourse, among other tests in County Code 22.52.110. Small fixes that leave drainage patterns alone may not need a plan; we check with County Public Works when the line is fuzzy.

How much soil can I move in Templeton before a grading permit?

County guidance says a grading permit is typically needed above 50 cubic yards of cut and fill. Major grading typically means 5,000 cubic yards or more, or earthwork on slopes of 10% or steeper. Exempt work can still need a drainage or erosion plan.

Does Templeton CSD issue grading or drainage permits?

No. Private property grading and drainage go through County Planning & Building and Public Works. TCSD’s Stormwater Management Program covers District facilities and offers homeowner stormwater education.

Should roof leaders dump into the street gutter?

Better to keep that water on the lot. Stormwater that reaches a drain is untreated. County drainage standards and TCSD guidance both favor planted basins, rain gardens and rock outlets whenever the site allows.

What if the foundation is cracked or the bank is moving?

Hire a civil or geotechnical engineer first. After that plan is in hand, we install the landscape side: grades, swales, buried leaders, drains, open paving, planting and short walls.