The RVMM database reflects the consequences of vegetation management in operational forest management settings (plantation age 0 to 20 years). It originated from the establishment of growth monitoring plots according to a specified matrix incorporating site productivity, Douglas-fir height class, and combinations of site preparation, competition release, and precommercial thinning. These matrix components were used to guide the representation of species, abundance, and intensity of vegetation. Sampling and data collection protocols for conifers, single- and multi-stemmed hardwoods, shrubs, and herbaceous vegetation were developed to facilitate both individual-tree and stand-level modeling approaches. Dataset matrix cells were represented by one or more 0.10- to 0.15-acre primary measurement plots (PMPs), each with four-nested 0.01-acre competition measurement plots. Nearly 200 PMPs were installed in the Coast Range Mountains (from Forks, WA to Coos Bay, OR) and the Cascade Mountains (west-side, from Concrete, WA to Oakridge, OR) of Oregon and Washington. The initial plot measurement was followed by remeasurement 2 years later.


The RVMM project was primarily funded by a Cooperative-Aid Agreement between Oregon State University (OSU) and the USDA Forest Service (Forest Pest Management, Region 6, Portland, OR). Additional funding to complete the individual-tree component of Cascades RVMM was provided by the USDI Bureau of Land Management, Salem, Oregon.

Steering Committee members included: Pete Owston (PNW Research Station, Corvallis), Gary Smith (R6-Forest Pest Management), Don Connett (R6-Timber Management), Tom Turpin (Siuslaw National Forest, Corvallis), and Stu Johnston (Siuslaw National Forest, Mapleton). Technical Working Group members included: Chuck Chambers (Washington DNR), Bob Curtis (PNW Research Station, Olympia), Dave Hann (OSU), Dave Hynk (Weyerhaeuser), Greg Johnson (International Paper), Dave Marshall (OSU), Dan Opalach (Simpson Timber), and Martin Ritchie (PSW Research Station, Redding, CA).

Significant in-kind contributions (assistance in locating and providing suitable forest sites for plot installation on industrial lands) were received from: Boise Cascade, Cavenham Industries, Champion International, International Paper, ITT-Rayonier, Simpson Timber, Starker Forests, Lone Rock Timber, Weyerhaeuser Company, and Willamette Industries.

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