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final grading of the reservoirs, trees and shrubs near the slurry wall will be removed to protect <br />the integrity of the barrier. <br />All backfilling and grading will be done to stabilize the material and control erosion. Final <br />grading and seeding will be done as soon as possible after slurry wall construction, backfilling, <br />grading, and topsoiling have been completed. There will not be known toxic or hazardous <br />materials in the slurry wall or backfill material. The reclamation will not leave high walls on the <br />property. In addition, there will be no auger holes, excavations, or shafts left on the property. <br />Topsoil and Revegetation <br />Re- vegetation will only include grass seeding of disturbed areas. No tree or shrub planting is <br />planned. Where required, topsoil will be replaced to a depth of approximately four to six inches. <br />Topsoil will be placed after slurry wall construction and final grading of the site is completed. <br />As the area is reclaimed, runoff or excess water from adjacent areas will not be allowed to flow <br />over slopes being graded and seeded. If needed, berms or channels will be constructed to divert <br />excess water and dispose of it in a safe and non - erosive manner. <br />Seeding of disturbed areas will be done as areas are finished with preparation including grading <br />and topsoil spreading. Planting will be most successful if done between mid - November and the <br />end of April. Planting can be performed in May if necessary, but after May it is not advisable to <br />plant. Planting before November is not advised as the potential for a warm growth environment <br />and early germination would likely result in a major failure of the revegetation and require <br />reseeding. <br />Fertilizer may be applied to re- soiled areas in a manner that will encourage emergence and <br />survival of the grasses without encouraging competition from weeds. Starter fertilizer could be <br />applied before, or at the time of, seeding. If necessary, full fertilization will be applied after <br />emergence. Fertilizer mixtures will be based upon soil tests made on samples taken from re- <br />soiled areas prior to seeding. <br />If a significant invasion of noxious weeds occurs after seeding, the weeds will be mowed before <br />they can go to seed. The areas will be mowed periodically for additional control as needed. <br />Mechanical control will be used as a first priority. Chemical methods will only be used if no <br />other alternative produces acceptable results. <br />Periodic inspection for noxious weeds, at least once a year early in the season, will be done. The <br />weed inspection will search for not only the expected species but also any new List A or B <br />species introductions. It is likely that non - noxious and List C species will also be found. Non - <br />noxious weeds, which are often native invaders, do not need to be controlled, but if the <br />population of a List C species is controllable then it will be included in the control program. <br />List C noxious species are problematic but are usually not as serious as List B species. List B <br />species in Larimer County include: Canada thistle, Musk thistle, Bull thistle, Scotch thistle, <br />Dalmatian toadflax, Yellow toadflax, Diffuse knapweed, Spotted knapweed, Russian knapweed, <br />Leafy spurge, Houndstongue, Common teasel, Tamarisk, Hoary alyssum, Hoary cress, and <br />Perennial pepperweed. All List A species must be eradicated by law. These weeds include <br />Yellow starthistle, Mediterranean sage, Myrtle spurge, Cypress spurge, Orange hawkweed, and <br />Treiber Lakes <br />DRMS 112 Permit Application <br />Page 10 <br />