Laserfiche WebLink
GUIDE TO SPECIFICATION PREPARATION FOR <br /> SLURRY WALLS AND CLAY LINERS AS A COMPONENT OF <br /> A COLORADO MINED LAND RECLAMATION PERMIT <br /> September 2000 <br /> Colorado Department of Natural Resources <br /> Division of Minerals and Geology <br /> Michael B.Long,Director <br /> H.Bruce Humphries,Minerals Program Supervisor <br /> Allen Sorenson,Contact Person for this Guide <br /> 1313 Sherman Street,Room 215 <br /> Denver,Colorado 80203 <br /> 303/866-3567 <br /> http://mininc.state.co.us/ <br /> INTRODUCTION <br /> It has become a common practice to reclaim gravel pits to a developed water resource land use through <br /> the installation of clay pit liners or slurry walls. The purpose of these installations is to isolate the <br /> constructed water storage reservoir from the surrounding ground water system. The State Engineer's <br /> Office has established design and performance standards for pit liners and slurry walls (see sections on <br /> _ Post ClnCtructinn Teyting below) It is the reSIIn�ability of the. MinedT .�n De. `i��te, Id <br /> sufficient bond to assure that the State Engineer's performance standard can be met if the Operator of a <br /> pit were to default and the state of Colorado were to reclaim the site with the forfeit bond. Under the <br /> Division of Minerals and Geology policy on lined pits dated March 29, 2000, Operators may choose the <br /> option to bond for 100 percent installation or replacement cost of a slurry wall or pit liner or may select <br /> a regulated construction option and become eligible for a 20 percent installation or replacement bond. <br /> Operators are free to design and install the liner or slurry wall with relatively minimal design <br /> information, specifications and quality assurance detail in the permit application under the 100 percent <br /> bonding option. The assurance that the pit will be reclaimedto developed water resources is primarily <br /> managed through the amount of bond held by the Board. For an Operator to be eligible for the 20 <br /> percent bonding option, the Division must have a high degree of assurance that the liner or slurry wall <br /> installed by the Operator will meet the State Engineer's performance standard. This assurance is <br /> provided through inclusion of design documents, plans and specifications, and a quality assurance <br /> program as enforceable components of the reclamation permit. <br /> This memorandum provides an outline that is intended to guide reclamation permit Applicants that are <br /> pursuing the 20 percent bonding option. Applicants that intend to bond for 100 percent of the <br /> installation or replacement cost of a slurry wall or clay liner do not have to provide the information <br />