Fallbrook, CA
Retaining Wall & Slope Drainage in Fallbrook
Looking for retaining wall & slope drainage in Fallbrook? Temecula Valley Drainage Pros serves Fallbrook (about 15 miles south of downtown Temecula) and the surrounding Temecula area. Drainage systems for hillside lots and retaining walls — wall weep systems, back-of-wall gravel drains, and slope interceptor drains that relieve hydrostatic pressure and control runoff. Retaining wall and slope drainage in Fallbrook, for walls that weep and hillsides that send water at the house.
Retaining Wall & Slope Drainage for Fallbrook homeowners & businesses
On Fallbrook's granitic hillsides a wall with sloping backfill is rarely permit-exempt: the County exempts only walls retaining three feet or less, under six feet total, with level backfill and no surcharge. Its standard drawing for sloping backfill calls for at least 12 inches of gravel behind the wall and four-inch drains every six feet.
If the wall is dry but the ground behind the house stays wet, see French drain installation in Fallbrook.
- Relieves hydrostatic pressure behind retaining walls
- Interceptor drains control hillside and slope runoff
- Protects walls, pads, and downslope structures
Runoff coming down a hillside toward the house, or a retaining wall that weeps, bulges, or stains? Talk it through for your Fallbrook property.
About Fallbrook
Fallbrook is home to roughly 32,267 residents (2020), in San Diego County, established in 1869. Fallbrook is a large unincorporated community in northern San Diego County, just south of the Riverside County line, settled in 1869 and known as the self-styled 'Avocado Capital of the World.' It sits on rolling hills at elevations from roughly 500 to 1,500 feet, with extensive avocado and citrus groves and chaparral hillsides.
Local landmarks include Live Oak Park, Santa Margarita River, Fallbrook Community Airpark, avocado groves.
Retaining Wall & Slope Drainage in nearby areas
Retaining Wall & Slope Drainage questions from Fallbrook customers
- Does a hillside wall on our lot need a permit?
- The County's building permit exemption covers walls that retain not over three feet of soil measured from top of footing to top of retained soil, are not more than six feet in total height from lowest finished grade, have level backfill with no other structures within six feet, and support no surcharge. A wall cut into a Fallbrook hillside with ground banked above it generally fails the level-backfill and surcharge conditions.
- What drainage does the County's own sloping-backfill wall drawing require?
- The County's sloping-backfill standard drawing calls for gravel backfill behind the wall drains or open head joints with a minimum thickness of 12 inches, and four-inch wall drains at six-foot intervals along the wall at the level of the bottom course of block. It also states that no building foundation, driveway, parking or other loading is allowed on the upper level within a distance equal to the wall height.
- Why does water show up behind walls here when the soil is called well drained?
- The Fallbrook series is classed well drained, yet described with moderately slow permeability and medium to very rapid runoff, and it carries an argillic horizon of heavy loam to sandy clay loam at 18 to 30 percent clay over a paralithic contact of decomposed granite at 40 to 60 inches. That contact falls inside the depth range of a hillside wall's backfill, so the material behind a wall is layered rather than uniform.
- Our slope is over 40 feet tall. Does that change what's required?
- County grading regulations require drainage terraces on slopes exceeding 40 feet in height, at vertical intervals of no more than 30 feet, with terraces at least six feet wide and swales of at least two percent grade and one foot depth. Cieneba-Rock outcrop complexes in the Fallbrook area are mapped at 30 to 75 percent slopes, and Cieneba soils are only 4 to 20 inches deep over weathered granite.
Runoff coming down a hillside toward the house, or a retaining wall that weeps, bulges, or stains
Describe your Fallbrook property and we will connect you with a local contractor.