Water came in through the walkout even though my swale looks fine. What else should I check?

Look uphill. On steep streets, runoff from lots above, a clogged street inlet, or a driveway that sheds water around the side of the house can all overwhelm a swale that is otherwise in good shape. Watching the yard during a steady rain usually reveals the path.

Do retaining walls on my lot need inspection after a big storm?

It is a good idea for taller walls, especially if you see leaning, bulging, or soil washing out at the base. A structural engineer can evaluate walls that hold back significant soil.

Crystal Valley Ranch: Hillside Runoff and Walkout Lots

Steep lots and fast water

Crystal Valley Ranch is one of Castle Rock's newer large communities, south of downtown and east of Interstate 25. Much of it is built into hillsides, with streets that switch back and lots that drop steeply from front to back. Many homes have walkout or garden-level lower levels facing downhill toward open space or drainage corridors.

On terrain like this, runoff gathers speed quickly. A storm that would leave puddles on a flat lot sends a sheet of water across a hillside yard in minutes. Swales and retaining walls carry a lot of the load, and small changes to them, like a new planter or a settled section of soil, have an outsized effect. Downhill lots also receive water from every lot above them.

Because parts of the community have been built out in phases, construction sites can be nearby. Bare graded ground sheds water and sediment more readily than established landscaping, and sediment control at active sites matters for the homes below. If muddy runoff from a construction area reaches your property, document it and contact the Town of Castle Rock.

Wall stripped to the studs after water and fire damage, showing stained framing. Shown to illustrate the work described; not a job for this site or at any address named here.

Checks for steep lots

Look for erosion at the base of retaining walls and along the edges of swales after each heavy rain.
Confirm weep holes and drains in retaining walls are open so water does not build up behind them.
Check that walkout patios slope away from the door, not toward it.
Keep landscape rock from washing into swales and blocking flow.
Watch for new cracks in walls, slabs or steps that could signal soil movement after soaking.
Note where water from uphill lots enters your yard and keep that path open.

Questions for Crystal Valley Ranch owners

Who maintains the retaining walls and swales along my lot lines: me, the HOA or a metro district?
Is there a recorded drainage plan for my lot that shows where uphill runoff is supposed to go?
If a nearby construction site is sending sediment my way, whom at the Town should I contact?
Would a drainage engineer recommend changes given my lot's slope and walkout exposure?

Map of Crystal Valley Ranch. It shows an area, not an office or a job site.

Common questions

Water came in through the walkout even though my swale looks fine. What else should I check?: Look uphill. On steep streets, runoff from lots above, a clogged street inlet, or a driveway that sheds water around the side of the house can all overwhelm a swale that is otherwise in good shape. Watching the yard during a steady rain usually reveals the path.
Do retaining walls on my lot need inspection after a big storm?: It is a good idea for taller walls, especially if you see leaning, bulging, or soil washing out at the base. A structural engineer can evaluate walls that hold back significant soil.

General information for Castle Rock, not a quote or professional advice. In an emergency, call 911.