SU0004096 - Laserfiche WebLink

Home Browse Search

Leanne Mueller November 4, 2002 Page 2 date of the permit is issued." 2. Equipment storage areas are not indicated on maps or in the text as required by CCR 3709(a). The reclamation plan map needs to be augmented to depict equipment storage areas. 3. The reclamation plan states that relocation of the irrigation pipeline may be possible in the future, and that portion of the project area will also be mined. If Relocation occurs following project approval, an amendment to the plan will be required prior to mining this portion of the project. The amendment must include a calculation of additional aggregate resources that will be mined and how mining of the pipeline area will affect phasing of the project. Geotechnical Requirements (Refer to CCR Sections 3502(b)(3). (b)(4), 3704 (a), (b), (d), (e), (f)) 4. The method for handling the significant volume of overburden that will be generated during mining should be more thoroughly described. The reclamation plan should clarify how much overburden will be stockpiled at a given time, where it will be stockpiled, and for how long it will be stockpiled. Erosion control seeding, mulch placement and other erosion control procedures should be proposed to winterize the stockpiles and any other exposed areas on the project site. The methods that will be used to backfill overburden should be described and should afford sufficient compaction so that differential settlement will not occur. A good approach to achieve some level of compaction without inhibiting orchard growth would be to lay dampened (moderate moisture content) overburden down in relatively thick, even lifts of, 2 to 3 feet, for example. Compaction of the sliver fills against the pipeline embankment should be engineered to 90% of maximum density, and may require a "toe-in" construction technique into in-situ soils to be used. 5. Performance criteria should be included in order to identify how much erosion can be tolerated in reclaimed cut slope and fill slope areas before implementing erosion control treatments. Such criteria may state, for example: "erosion of rills greater in cross section than 5 square inches exceeding 5 feet in length will be arrested by placement of graded rock interceptors or straw bales to slow ,n mnfrnfarl n innff within 1 wPPk following anv rainfall event."