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FOREST MANAGEMENT WORKSHOP MANUAL
MOUNTAIN SITE CLASSIFICATION
The following forestland classification system was developed as a
simple method of determining forest site quality for use by the
landowner. More technical systems of site classification are in use by
foresters, district conservationists, and other resource managers.
- Class I
- Highly productive alluvial soils on flood plains of larger streams.
Drainage variable. Subject to periodic flooding.
- Class II
- Highly productive well-drained alluvial-colluvial soils at the top
of slopes or on narrow flood plains of mountain creeks.
- Class III
- Lower 1/3 of slope (higher on north-facing); in well-protected,
moist cove sites, and on fertile benches situated on slope sites.
- Class IV
- Intermediate sites. Mid-slope positions on side or on open
(wide) cove sites.
- Class V
- Marginal sites. Middle (flat or concave) portion of broad
ridges. Upper 1/4 of slope on most exposed side slopes, but
upper 1/3 of slope on steep south and southwest slopes, small
finger ridges.
- Class VI
- The poorest sites. Narrow ridges or edge of broad ridges
with more than 50% rocks and boulders or less than 3 inches of
topsoil. These sites should not justify management for timber,
but might have other values.
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Last revised September 3, 1995.