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SECTION 3100 00 <br />EARTHWORK <br />General <br />Installation shall be conducted in a skillful and workmanlike manner. Caution shall be exercised in backfiIl and <br />compaction around structures or conduits to prevent damage, movement or deflection. A consistent homogeneous <br />fill is necessary. The installation shall be performed with proper moisture content and with adequate mixing of <br />the soil materials to accomplish this. <br />Construction operations shall be carried out in such a manner and sequence to minimize erosion, air and water <br />pollution. The completed job shall present a workmanlike appearance and shall conform to the line, grades, and <br />- -- elevation shown on the drawings or as staked in the field. All operations shall be carried out in a safe and skiIlfid <br />manner. Safety and health regulations shall be observed and appropriate safety measures shall be used. <br />Earth Engineering Consultants, Inc. (EEC) performed an on -site geotechnical investigation. As part of their final <br />report (Project No. 1092026), site - specific recommendations are made. Those recommendations are <br />complimented here as applicable. <br />EMBANKMENT CONSTRUCTION SPECIFICATION <br />1. Scope <br />This specification is for earthen embankment of the Colorado Beef Reservoir in Prowers County, Colorado. This <br />specification is intended for construction and inspection methods for the construction of the embankment with on- <br />site earthen materials to insure stability of the embankment structure. Site specific geotechnical testing will be <br />required of a qualified geotechnical engineering firm to provide the field testing values (density and moisture <br />readings) for the installation of the embanlanent material. <br />2. Foundation Preparation and Excavation <br />The footprint of the reservoir embankment shall be stripped a minimum of 12 inches to remove vegetation and <br />organic matter and then scarified and wetted to create a foundation for the berm and preparation for the first lift of <br />fill material. All strippings shall be stockpiled in locations as shown on the Earthwork Construction Plans <br />(Enviro -Ag Engineering, Inc.). <br />Weathered claystone bedrock may be encountered along the northeastern interior slopes and bottom of the <br />reservoir (included in boring logs in the EEC report). The material may be suitable for ripping so that subgrade <br />elevations can be achieved. If the bedrock is encountered prior to achieving the correct subgrade elevation, the <br />bedrocks shall be over - excavated such that a six -to -nine inch thick soil foundation can be installed. This <br />foundation shall be prepared prior to placement of the liner. This foundation layer- shall consist of soils in the area <br />of excavation and shall be compacted to 95% of Standard Proctor at optimum moisture ( -1 to +3 %). The <br />Geotechnician shall document that the soil foundation has been constructed to the specified thickness and has <br />achieved the specified density and moisture control prior to placement of the liner material. This information <br />shall be included in the Geotechnician's final report. <br />329000-1 <br />