Hill on one side, river on the other
Hydroseeding in Tigard, OR
Bull Mountain to the west, the Tualatin River and Fanno Creek to the south.
- No-cost site visit, then a quote in writing
- Seeding planned around the Willamette Valley rain calendar
- Silt fence and stabilization installed to your approved erosion plan

Seeding Between Bull Mountain and the River
Hydroseeding in Tigard covers ground that tilts from Bull Mountain, the hill to the west that Tigard voters approved annexing in 2004, down toward the Tualatin River. The river flows past Cook Park on Tigard's side and picks up Fanno Creek just downstream, between Tigard and Durham on one bank and Tualatin on the other.
Bull Mountain lots
Homes on Bull Mountain sit on graded pads with banks above and below them, and those banks are where washing shows up first. A bonded fiber matrix holds better than standard mulch there, and a row of wattles near the top of a long bank slows runoff before it picks up speed.
Along Fanno Creek and the Tualatin
The Tualatin is a slow river; its name likely means lazy or sluggish, and in 1989 it became the first river in Oregon to fail overall pollution limits. Sediment from bare yards adds to that. If your lot drains toward Fanno Creek or the river, we keep silt fence on the downhill edge until the grass is thick.
A prairie once kept open by fire
Before settlement, the Atfalati regularly burned the valley floor near present-day Tigard to encourage camas and keep forest from spreading. With that open-prairie history in mind, a native grass or wildflower mix can suit larger lots and drainage areas where you do not want mowed turf.
Land-use rules
Tigard was the city in Dolan v. City of Tigard, the 1994 Supreme Court case that set the rough proportionality test for conditions placed on land-use approvals. On permitted projects, follow your approval conditions for erosion control; we install what the plan calls for.
Have a Tigard yard or site in mind? Phone (971) 588-2069 or get a free estimate and we will find a time to come look.
Tigard Land and Water
- Bull Mountain. Tigard voters approved annexing the unincorporated suburbs on Bull Mountain, a hill west of the city, in 2004.
- Fanno Creek. Fanno Creek enters the Tualatin River just downstream of Cook Park, between Tigard and Durham and the city of Tualatin.
- Prairie burning. The Atfalati regularly burned the valley floor to encourage camas and discourage forest growth.
- Dolan case. Dolan v. City of Tigard (1994) set the rough proportionality test now used for land-use exactions.

Tigard Questions
Why do the banks around my Bull Mountain house keep eroding?
Graded banks shed water fast. A heavier mulch or blanket, plus wattles to slow runoff, usually stops it once the grass roots in.
Can I seed a native meadow instead of lawn?
Yes, on part of a larger lot or a drainage area. It needs little mowing and fits the area's prairie past.
My yard slopes to Fanno Creek. Is silt fence required?
Your permit or the city decides when it is required. Either way, a barrier on the creek side is wise while soil is bare.
Do you follow the erosion plan in my permit?
Yes. We install the measures shown on the approved plan and seed the disturbed areas.
Free Estimates in Tigard, OR
Site visits across Tigard, Bull Mountain included.
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