Laserfiche WebLink
inlet to this impoundment. <br />Weed Control <br />Survey for noxious weeds was carried out on the Seneca II Mine permit area in 2002. Monitoring was conducted in <br />2001 to determine [he need or level of retrea[men[ necessary for areas sprayed in 2002. Canada thistle (Cirsium <br />arvense was [he primary target species in all control areas, with lesser activity directed towards areas of white[op <br />(Cardaria drabal. The applied herbicide consisted of a tank mix of 2.5 gallons of 22K Tordon and 2.5 gallons of <br />2,4,D with 250 gallons of water. Control areas were sprayed in May and June. A spot spray gun was used to <br />concentrate control activities on target areas, reducing potential impacts to adjacent desirable vegetation. The <br />herbicide mix, based on recommendations from the Colorado-State Extension Service, was mixed and applied by the <br />Seneca Mine Reclamation Manager who is a certified applicator. The weed control areas will continue [o be <br />monitored in 2003 for effectiveness and necessary retreatment. <br />Revegetation Monitoring <br />Revegeta[ion monitoring of permanently revegeta[ed areas was conducted during the summer of 2002 by ESCO <br />• Associates, Inc. The 2002 annual revegetation monitoring report is submitted as a separate document (ESCO and <br />SCC, 2002). <br />Grazin <br />Long yearlings grazed in the Pecoco Pasture during 2002. On May IS's, 150 head were placed in the Pecoco Pasture. <br />On July 10'", all cattle were moved off the Pecoco Pasture. This resulted in 240 animal unit months on the Pecoco <br />Pasture. Since Seneca was in the process of realigning the fence and working on drainage channels in Wadge <br />Pasture, no cattle grazed the Wadge pasture in 2002. <br />This grazing scheme resulted 240 AUMs of grazing in the 210 acre Pecoco Pasture, which produced 276 AUM of <br />forage based on 2001 field data collected by ESCO. The grazing scheme for the Pecoco pasture resulted in 171 <br />AUMs used. The uliiization was 62%. <br />The 2002 grazing season was extremely dry and [he forage did not rebound From a lack of moisture. Seneca will <br />conduct annual production monitoring in both Wadge Pasture and Pecoco Pastures during 2003 field season. Since <br />• SCC must haul water to the cattle in the Wadge Pasture this pasture is not utilized as much as the Pecoco Pasture, <br />4 <br />