Forest Investment Account

Abstract of TERP Project #0-21

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Dry forest restoration projects in the Haylmore Creek Drainage, Squamish Forest District

Author(s): Gray, Robert W.; Davies, J.
Imprint: Victoria, B.C. : Ministry of Forests, Squamish forest District, 2002
Subject: Restoration Ecology, British Columbia, Fire Ecology, Forest Investment Account (FIA)
Series: Terrestrial Ecosystem Restoration Program Forest Investment Account (FIA) - Land Base Investment Program


The Squamish Forest District Small Business Program is implementing dry forest restoration using timber sales for areas where this is economically viable. TERP funding was used in other areas where timber harvest could not pay for restoration treatments, in order to create a large, contiguous restored area. The restoration objectives that the TERP project intended to address were reduction in crown closure, reduction of ladder fuels, reduction of surface fuels, lifting of the canopies of the residual trees, and shifting the understory from a depauperate condition to a community of plants that historically inhabited the site. The overall goal is to restore historic ecosystem structures, constituents and processes to interior Douglas-fir & ponderosa pine forests. Three distinct stand types were treated. The first stand type (10 hectares) was an open-grown ponderosa pine/Douglas-fir stand. The treatment used thinning to restore the historic range of variability for stand structure and species composition, followed by prescribed burning. The old trees were retained and most of the younger Douglas-fir were felled, bucked and scattered. Individual trees located at a distance from old trees were pruned and retained as recruitment trees. The second stand type (30.5 hectares) was an older stand in what appeared to be a fire refugia. The treatment in this stand consisted of removing ladder fuels (trees less than 10 cm), and protecting fire-scarred trees in preparation for burning. No suitable burn window for this site occurred during the project timeframe, and the area remains prepared for burning. The third stand (39 hectares) was the most challenging and expensive to treat, as residual historic stand structure was often not present. The area was reasonably consistent in terms of stand structure and composition at the outset. Three different treatment regimes were used in sub-units of the site. Treatment one involved the falling and slashing of all Douglas-fir less than 23 cm diameter, and all ponderosa pine less than 15 cm. A log forwarding machine was used to pile or remove residual stems, as a way of reducing heavy fuels. Any trees showing fire scarring were wrapped with protective material. The initial stand density was 3300 stems per hectare, and the post-treatment density was 150-250 sph. Treatment two was similar, without the use of machinery as the area was accessible to firewood cutters. Unit three had an initial density of 2600 sph, and machinery was used to mulch thinned material on site. All treatment areas in this third stand type were under-burned. A video titled: Dry Forest Restoration is produced by the Squamish Forest District and is available in the Ministry library, and the project report, including burn plan is also available: Gray, R,W. & J. Davies. 2002. Dry Forest Restoration Projects in the Haylmore Creek Drainage, Squamish Forest District. For the Ministry of Forests, Squamish Forest District.
Project Name: Dry Forest Restoration, #0-21
Project Proponent: Squamish Forest District, Small Business Program
Keywords: fire restoration, ponderosa pine, pine beetle, interior Douglas-fir

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Updated July 25, 2006 

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