Mail:   Phone: 1-360-276-8211 x7001


Quinault Silviculture Program

Quinault Silviculture DepartmentThe Quinault Silviculture Program mission is to promote the Quinault tradition of being good stewards of all natural resources by protecting and maintaining forest health and productivity for future use. The Program will use the best available science and Quinault traditional ecological knowledge to make balanced decisions and maintain a state of protective readiness to guard Quinault Indian Nation natural resources.

Forest lands of the Quinault Indian Nation can be categorized into four basic forest types: matrix, riparian management zones, potential avulsion and/or erosion zones, wetlands, and unstable slopes.

Matrix – The matrix is the most continuous and interconnected pattern in the landscape, comprising most of the lowland portion of the reservation. It is within the matrix that other forest types reside. Silviculture prescriptions for this portion of the reservation include:

  • Replanting at 400 to 680 trees per acre depending on site-specific characteristics following harvest
  • Evaluating the stand for pre-commercial thinning following a ten to fifteen year stand exam
  • Considering commercial thinning stands depending on site and stand conditions
  • Applying fertilizer ten to fifteen years prior to final harvest
  • Clear-cutting stands at final harvest with a targeted rotation age of 40 years.

Riparian Management Zones – Streams on Quinault lands are classified as either type D, type H, or type O waters. All waters have a ‘riparian management zone (RMZ)’ which is measured from the ordinary high water mark of the stream to the edge of an allotted amount depending on the stream type. Harvest activities permitted within these zones differ depending upon the type of water.

Wetlands – Generally, wetlands are lands where saturation with water is the dominant factor determining the nature of soil development and the types of plant and animal communities living in the soil and on its surface.

Unstable Slopes – Unstable slopes will be managed to minimize acceleration of the naturally occurring rate of landslides secondary to forest practices. Protection measures will be made to safeguard slope stability of the following types of unstable slopes:

  • Inner gorges, convergent headwalls, and bedrock hollows steeper than 35 degrees (70%)
  • Toes of deep-seated landslides with slopes steeper than 33 degrees (65%)
  • Groundwater recharge areas for glacial deep-seated landslides
  • Outer edge of a meander bend along a valley wall or high terrace of an unconfined meandering stream
  • Areas that have the potential to threaten public safety, deliver sediment to a public resource, or threaten capital improvement.

Quinault Silviculture Methods

Following regeneration harvest, residual vegetation and logging debris would be treated if necessary to reduce fire hazard, provide room for planting of tree seedlings, lessen initial competition from other vegetation, and limit the cover for seedling damaging rodents. Methods used would include prescribed fire and mechanical clearing.

The Quinault Silviculture Program preferred method of site preparation is prescribed fire. Burning is usually conducted when soil and fuel moistures conditions will keep fire intensity low. Low intensity fires on the Quinault lands have insignificant impacts on site productivity. Moderate to high intensity fires have the potential to reduce soil productivity, volatilize significant amounts of available nitrogen and sulfur, and increase leaching of important nutrients.

The techniques employed to reduce compaction during mechanical clearing include using low ground pressure machines, clearing only when soils are very dry, and rehabilitate by ripping and/or water barring any ground based skid trails after clearing.

Quinault Silviculture Program System

A Silviculture system is a planned series of treatments for tending, harvesting, and reestablishing a stand to meet management objectives. These treatments are applied throughout the life of the stand and are combinations of regeneration methods and stand tending, called intermediate treatments. Writers of Silviculture prescriptions and other documents should use consistent terms to avoid confusion of intent and to adhere to the professionalism of the craft.

All Silviculture systems include three basic component treatments or functions: timely regeneration, tending and harvest in a stand. The system, with its attendant regeneration methods, distinctively shapes the structure, either uniform or variable; tending requirements; and yield schedule of the future stand. A systematic approach to Silviculture should:

  • Harmonize with the goals and specific objectives of the Quinault Indian Nation
  • Provide for timely regeneration of the desired species
  • Effectively and efficiently use growing space and site productivity, making wise use of forest capital
  • Manage forest pathogens and damaging agents within acceptable limits
  • Protect soil and water resources
  • Produce predictable harvests over the long term (sustained yield)
  • Balance ecological and economic concerns to ensure a sustainable ecosystem

The Quinault Silviculture Program consists of:

Quinault Pest Management Program

Quinault Regeneration Program

Quinault Stand Improvement Program

Quinault Tree Improvement Program


Forestry Manager, Jim Plampin  »  360.276.8215 x290

Environmental Protection Manager, Daniel Ravenel  »  360.276.8215 x7301

Planning Forester, Cynthia Harbison  »  360.276.8215 x512

Silviculturist, Jimmy Hargrove, Jr  »  360.276.8215 x621

Regeneration Technician, Cheryl Bumgarner  »  360.276.8215 x285


Additional Quinault Silviculture Resources:

Quinault 2017 Forest Management Plan

Quinault Traditional Ecological Knowledge Program

Quinault Environmental Protection Department

Quinault Forest Management Project

Washington Department of Natural Resources

U.S. Forest Service Silviculture

What is Silviculture? (Wikipedia)