On the hill above the valley
Hydroseeding in Duvall, WA
Duvall's town center sits on a hillside above a valley that floods from late fall to early spring.
- We walk your property first, then put the quote in writing at no charge
- Seeding dates planned around Seattle's dry summer and wet winter
- One crew for grading, seeding and sediment control
Duvall Hillside Lawns
Hydroseeding in Duvall usually means hillside yards. The center of town sits on a hillside first homesteaded by the loggers Francis and James Duvall in 1871, above a Snoqualmie Valley that is subject to flooding from late fall to early spring. Most homes are up on the slope, at around 404 feet, and runoff from them heads down toward the valley.
Slopes first
Because so much of Duvall slopes, we plan erosion control before grass. The steeper ground gets rolled blankets or sprayed bonded fiber matrix; flatter parts get a lawn mix with fiber mulch. Downspouts and driveway runoff should go to a proper outlet, not across a freshly seeded bank.
The valley below
The flood season runs from late fall to early spring, the same months bare soil is most exposed. Anything that washes off a hillside lot is heading toward that valley and its farms and river. Silt fence along the low edge of a construction site is a simple way to keep soil where it belongs.
A town that moved
Around 1909 the railroad agreed to move Cherry Valley's homes and businesses to the new town site, and Duvall was incorporated in 1913. Older lots in the historic core may have shallow, disturbed soil, so we often add topsoil before seeding.
Growth
Duvall grew by 50 percent from 1990 to 1997 and reached 8,034 people in 2020. Newer neighborhoods bring builder lots that need silt fence during construction and hydroseeding to finish. Lake Rasmussen, just east of downtown, is another water body we keep in mind on nearby jobs.
What Duvall homeowners ask about
- Hillside erosion control
- Lawn installation on new lots
- Topsoil for thin hillside soil
- Silt fence for builders
Get a free estimate or call (206) 208-7934.
Duvall Lay of the Land
- Hillside town. The center of present-day Duvall is on a hillside homesteaded by loggers Francis and James Duvall, who arrived in 1871.
- Flood-prone valley. The surrounding Snoqualmie Valley is subject to flooding from late fall to early spring.
- Relocated town. Around 1909 the railroad agreed to move Cherry Valley homes and businesses to Duvall to continue construction along the river.
- Lake Rasmussen. Lake Rasmussen is located just east of downtown Duvall.
Duvall Questions
My whole backyard slopes toward the valley. Can I still have a lawn?
Usually on the flatter part. We stabilize the steeper section with bonded fiber matrix or blankets and a low-mow mix.
When is the safest time to seed a Duvall slope?
Early fall, so roots are established before the late-fall flood and storm season.
Why add topsoil on an older lot near downtown?
Older, disturbed lots can have thin or compacted soil. A few inches of topsoil help new grass root properly.
Is silt fence needed on a hillside build?
On a slope draining toward the valley, yes. It is one of the cheapest ways to keep soil on site.
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