Laserfiche WebLink
Ms. Katie Fende/ November ll, 2005 <br />Leonard Rice Engineers Page q <br />o Obtain topsoil onsite or from a source that is free of noxious weed seed <br />o Prepare and implement a noxious weed management during and after <br />_ .. mining..... _ _ . _ ... - - ... ~ __ _. <br />Require that sufficient water be available for tree and shrub watering. ERO <br />estimates that water necessary in the first 2 to 3 years is 30 gallons for trees <br />and 15 gallons for shrubs every 1 to 2 weeks (about 630 gallons per tree would <br />be required during the growing season). <br />• Require that vegetation establishment on the site be monitored for a minimum <br />of five years for each phase (e.g., the benches currently proposed) of the <br />project, mining cease if success criteria are not met at the end of the 5-year <br />monitoring period, and that subsequent phases not proceed until success <br />criteria are met. Success criteria in year 5 should include: <br />o Minimum 90% or trees and shrubs planted must be alive and healthy. <br />o Vegetation cover percent (as measured in representative areas by <br />statistically repeatable methods) must be equal to or greater than to <br />existing cover. <br />o Tree and shrub cover of (as measured in representative areas by <br />statistically repeatable methods) must be equal to or greater than <br />existing tree and shrub cover. <br />o Require that the cliff and bench topography proposed be modified or <br />changed to provide better wildlife habitat. <br />The reclamation bond should contain at least $786,608 to cover the cost of <br />revegetation. This bond was calculated based on average bids included in <br />2000 cost data from the Colorado Department ofTransportation (CDOT 2001) <br />(Please note that since 2000, these costs likely have increased), and where <br />indicated, information from a local contractor (Dean 2005) and from other <br />ERO projects: <br />Topsoil placement: $7.47/CY x 40 ac. x 4 in. _ $159,081 <br />Seeding: $836.47/ac. x 40 ac. _ $33,459 <br />Nate: a CDOT 2000 bid for a project in Black Hawk was <br />$1,600/acre. To apply this cost to the MMRR quarry would raise <br />the seeding cost to $64,000 <br />Organic amendments (assumed BioSol'"'): $3,075/ac 8 40 ac. (ERO project) _ $123,000 <br />Straw mulch: $356/ac. x 40 ac. _ $14,240 <br />Tree and shrub plantings: (800 trees and shrubs= $47,200 <br />Watering (landscaping): (800 trees and shrubs) (Dean 2005) _ $17,200 <br />Weed control: $387.20/ ac. x 40 ac./year = $15,488 <br />Total: $786,608 <br />Consultants in Natural Resources and the Environment <br />