Drainage contractors in Cashiers.

At the top of the watershed, drainage is energy management

Here is the honest version of Cashiers drainage: it is the opposite of a valley town’s flooding problem. Cashiers sits high on the southern Jackson County plateau, around 3,500 feet, at the crossroads where US 64 meets NC 107 — granite-dome country with Whiteside Mountain just east, the Chattooga River heading up off the plateau’s southern edge, and the West Fork Tuckasegee feeding Lake Glenville to the north. This is the head of the watershed, not the bottom of it. Water here isn’t pooling because it has nowhere to go; it is leaving fast, and the damage is what it does on the way out.

The plateau is built on steep, well-drained upland soils, and the survey (NC099) even describes a series named for the town itself — the Cashiers series, a Humic Dystrudepts mapped on these high shoulders at a typical 34.5% slope. Around it the dominant ground is Chandler (a Typic Dystrudepts, somewhat excessively drained, 34.5%) and Wayah (37.7%), with the bouldery Cullasaja (33.5%) and steeper Chestnut and Plott on the higher shoulders. None of it holds water — it sheds it. So drainage work on a Cashiers lot is rarely about removing standing water; it is about giving fast runoff a designed route and bleeding off its speed before it cuts the ground.

Lots that land on a Saunook toe-slope cove or a Braddock terrace bench are the gentle exception — still well drained, but far softer ground at 12.2–15.2%. There runoff slows on its own and the routing is simpler. A careful site walk — ideally in the rain — is what tells us which kind of ground your specific lot is on and where the water is already trying to go.

Slow it before it scours: diversions, ditches, check structures

On the steep Cashiers, Chandler, Wayah and Cullasaja shoulders, the play is interception and energy control. A diversion swale across the upslope edge catches the sheet flow before it reaches anything that matters; a stone-lined ditch carries the concentrated flow with armor where velocity would otherwise scour bare ground; check structures and a stepped grade bleed off speed so the water drops its sediment instead of carrying it. The Cullasaja stone is the wild card — a Typic Humudepts full of cobbles and rock that slows the trench and can change the method. Every route ends at an outlet that can absorb the flow without scouring or loading the stream below.

Sediment control is not optional at the headwaters

Because Cashiers heads the Chattooga and Lake Glenville watersheds, any soil that washes off a disturbed slope goes straight into protected water. So every drainage job here is paired with real erosion and sediment control — disturbed faces held until they re-vegetate, flow slowed so it drops its load, outlets armored. Cashiers parcels skew large — a 1.16-acre median with 56.1% of parcels at or above one acre and 10.2% at 5 acres or more — so when drainage is part of a bigger site job it can cross North Carolina’s one-acre disturbance trigger (NC GS 113A-57(4) (Sedimentation Pollution Control Act of 1973)), which requires an approved E&SC plan filed 30 or more days prior to initiating the activity at $119/acre. We confirm whether the NC DEMLR Asheville Regional Office or a delegated local program has jurisdiction before any dirt moves.