Laserfiche WebLink
DATE: January 26, 2006 <br />TO: Jim Stark and Sandy Brown <br />FROM: Dan Mathews <br />RE: OC#2 Mine Vegetation Sample Results <br />Procedures <br />Jim and I sampled vegetation cover and production at the OC#2 Mine on June 27 <br />and June 28, 2005. We ran 73 systematically distributed cover transects, covering the <br />entirety of the small reclaimed area. 47 of the transects were on the primary facilities <br />area on the reclaimed slope, the remaining 26 transects were on the smaller sediment <br />pond/topsoil stockpile area at the base of the slope. Each cover transect was 5 meters in <br />length, and we took 10 cover readings at one meter intervals along each transect, for a <br />total of 50 cover readings per transect. Cover readings were taken using a tripod <br />mounted ocular point bar, with 10 scopes spaced along the bar (a "10 point frame"). <br />Cover summary data is presented in an attached spreadsheet, "7-2005 OC#2 Cover Data". <br />Count #1 through #47 aze the reclaimed slope area transects. Count #48 through #73 are <br />the pond stockpile transects. <br />At the 1 m point to the right side of each transect we placed a rectangular quadrat <br />frame and clipped and bagged the non-noxious current years herbaceous growth from <br />each quadrat. 1 sq. meter quadrats (1/2m x 2m) were used in the low productivity facility <br />reclamation area; '/4 sq. meter quadrats (1/2m x 1/2m) were clipped in the higher <br />productivity pond/stockpile azea. The non-vegetated pond inslopes and pond bottom <br />were excluded from the sample area. Samples were oven dried and weighed at CSU. <br />Production sample results are listed in an attached spreadsheet, "7-2005 OC#2 Production <br />Data". The sample bag contents corresponding to Count # 1 through #26 were the %a <br />meter quadrat clippings from the pond/stockpile area; dry weights were multiplied by 4 to <br />obtain grams per square meter. Bag contents corresponding to Count #27 through #73 <br />were from the 1 square meter quadrats, for which no conversion was necessary. <br />Standards and Results <br />Cover Standard Reclaim Cover Sample Mean <br />40.5% (i.e. 90% of 45%) 31.1% <br />Production Standazd Reclaim Production Sample Mean <br />131.1 grams/sq. m 134 grams/sq. m <br />(90% of 145.7 g/sq.m; or 1300 lbs/acre) <br />