On July 3, 2008 the U.S. Army Corps of Engineers issued a Public Notice (ID#: 200701619) regarding The Cliffs at High Carolina’s request for a permit. In the report the Corps identified 22 different soil types on the High Carolina steep slope, 3,200-acre, development site. Dominant soil types are Porters-Unaka complex (841), Toecane-Tusquitee complex (181) and the Edneyville-Chestnut complex (803).
As referenced in Western North Carolina Soil Surveys, these three soil types are not recommended as a construction base because of inherent instability. Even with expert engineering techniques, roads built on these soils are subject to slope failure and expensive repairs.
Roads built on landslide-prone soils are not a future financial concern for Jim Anthony, the developer of Cliffs at High Carolina, because legal title for The Cliffs at High Carolina's private roads are transferred to individual property owners at time of each lot sale via a conveyance document titled the Subdivision Street Disclosure Statement.
The Cliffs at High Carolina Property Report provides more than a dozen black box warnings concerning the developer, subdivision and individual lots but there is no reference to the costs of maintaining roads built on unstable soils. The following caveat should have been included in The Cliffs at High Carolina Property Report:
Steep Slope Subdivision Street Disclosure StatementAlthough not publicized, Buncombe County landslide predictability maps have been available since August 2009. Until such time the Buncombe County Digital Soil Survey Map is released, interested parties will have to rely on data from Western North Carolina Soil Surveys. As noted in the following soil assessment reports, The Cliffs at High Carolina soils are ill-suited for road construction.
Portions of this subdivision’s roads were built on unstable soils. Landslides and erosion are recognized chronic hazards above a 15% slope. Soil assessments for this subdivision can be found at the county Soil & Conservation Office. The developer was not required to conduct geotechnical, hydrologic or soil suitability studies for this subdivision. Should this subdivision’s roads be damaged by predictable natural occurrences, the members of the homeowners’ association will be liable for all repairs.
Soil Survey Findings for Porters-Unaka Complex
Porters-Unaka complex— 8-15% Slopes
Local roads and streets: Poorly suited
Porters-Unaka complex—15-30% Slopes
Local roads and streets: Poorly suited
Porters-Unaka complex— 30-50% Slopes
Local roads and streets: Poorly suited
Porters-Unaka complex—50-95% Slopes
Local roads and streets: Unsuited
Soil Survey Findings for Toecane-Tusquitee Complex
Toecane-Tusquitee complex— 8-15% Slopes
Local roads and streets: Poorly suited
Toecane-Tusquitee complex&mdash 15-30% Slopes
Local roads and streets: Poorly suited
Toecane-Tusquitee complex— 30-50% Slopes
Local roads and streets: Poorly suited
Soil Survey Findings for Edneyville-Chestnut Complex
Edneyville-Chestnut complex— 15-30% Slopes
Local roads and streets: Poorly suited
Edneyville-Chestnut complex— 30-50% Slopes
Local roads and streets: Poorly suited
Edneyville-Chestnut complex— 50-95% Slopes
Local roads and streets: Unsuited
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