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- SPECIFICATIONS* <br /> 1.0 SEDIMENTATION PONDS <br /> 1.1 GENERAL <br /> 1,1:1 SEDIMENTATION POND B SHALL BE CONSTRUCTED IN ACCORDANCE <br /> .. WITH THE CONSTRUCTION DRAWINGS AND SPECIFICATIONS. <br /> 1.2 SITE' PREPARATION <br /> 1.2.1- THE POND AREA HAS BEEN STRIPPED OF TOPSOIL AND VEGETATION, <br /> ANY SOFT OR WEAK SOILS WHICH ARE LOCATED IN CRITICAL AREAS <br /> OF THE PONDS AND WHICH COULD, 'IN THE OPINION OF THE <br /> INSPECTING ENGINEER, INFLUENCE THE STABILITY OF THE PONDS, <br /> SHALL BE REMOVED PRIOR TO CONSTRUCTION. <br /> 1.3 CONSTRUCTION <br /> 1.3.1 EMBANKMENTS SHALL BE CONSTRUCTED FROM FINE-GRAINED ON-SITE <br /> COLLUVIAL SOILS,'' NO ROCKS LARGER THAN 6-INCHES MAXIMUM <br /> DIMENSION SHALL BE INCORPORATED INTO THE FILL. SOIL <br /> MATERIALS SHALL BE SEGREGATED AS NEEDED TO MEET MATERIAL <br /> SIZE AND COMPACTION REQUIREMENTS, NO ROOTS, STUMPS, <br /> ORGANIC OR OTHERWISE DELETEREOUS MATERIALS SHALL BE <br /> INCORPORATED INTO THE FILLS, <br /> 1.3.2 FILL SHALL BE PLACED IN HORIZONTAL LAYERS NOT EXCEEDING TWELVE <br /> INCHES IN LOOSE THICKNESS AND- COMPACTED BY ROUTING THE CON- <br /> STRUCTION EQUIPMENT UNIFORMLY OVER THE SURFACE OF THE FILL. <br /> 1.3.3 COMPACTED EMBANKMENTS SHALL HAVE A DRY DENSITY OF AT LEAST <br /> 95 % OF THE MAXIMUM DRY DENSITY AS DETERMINED BY THE AMERICAN <br /> ASSOCIATION OF STATE HIGHWAYS AND TRANSPORTATION OFFICIALS <br /> (AASHTO) SPECIFICATION T99-74 ("STANDARD PROCTOR") . <br /> 1,3,4 FILL PLACED AROUND PIPES, CULVERTS OR OTHER STRUCTURES IN- <br /> CLUDED WITHIN THE EMBANKMENT SHALL MEET THE SAME PLACEMENT <br /> AND COMPACTION CRITERIA AS ALL OTHER FILL, <br /> 1,3.5 THE DISTRIBUTION OF MATERIALS IN EMBANKMENTS SHALL BE SUCH <br /> THAT THERE ARE NO LENSES, POCKETS OR STREAKS OF MATERIAL DIF- <br /> FERING SUBSTANTIALLY FROM THE SURROUNDING FILL. <br /> 1,3, 6. FILL SHALL NOT BE PLACED ON FROZEN SURFACES, NOR SHOULD SNOW, <br /> ICE, OR FROZEN MATERIAL BE INCORPORATED INTO THE FILL. <br /> 1,4 MAINTENANCE <br /> 1.4.1 SEDIMENTATION PONDS SHALL BE ROUTINELY MAINTAINED DURING THE <br /> MINING OPERATIONS, VEGETATION GROWTH SHALL BE CUT WHERE NECES- <br /> SARY TO FACILITATE INSPECTIONS AND REPAIRS. DITCHES AND SPILL- <br /> WAYS SHALL BE CLEANED. <br /> 1.5 INSPECTIONS <br /> 1.5.1 ALL EMBANKMENT FILLS SHALL BE INSPECTED DURING CONSTRUCTION <br /> AND OPERATION IN ACCORDANCE WITH THE SECTION 3 .0 INSPECTIONS, <br /> OF THESE SPECIFICATIONS. <br /> *These sediment pond specifications were developed for <br /> Mid-Continent by Geo-Hydro Consulting Company during the <br /> summer of 1984 . See "as built" engineering drawings at Exhibit 11-B-7-Att. 6-21. <br />