OCR Text |
Show J. At Currant Creek and wherever feasible, topsoil from the area to be disturbed would be stripped away and stockpiled for later redistribution and seeding after excavation of material or deposition of tunnel spoil had been carried out. This item would be written into contract specifications. 8_. Preconstruction planning would include an analysis of existing vegetation, soil, and climatic conditions to determine which restoration plans would be best suited for the area in question. 9_. Seeding and planting of shrubs would be completed as soon as possible after final contouring had been carried out. Emphasis would be placed upon planting during the proper season of the year and steps would be taken ( fertilization and watering, etc.) to insure that growth became well established. 10. Permanent spoil piles would be leveled and contoured as much as required to achieve adequate stability. Waste piles near water would be sprayed with clear, biodegradable stabilizing material. Establishment of vegetation would be attempted. Whenever feasible, spoil piles would be kept away from stream courses. 11. Restoration treatments would be monitored until a stable situation develops. Additional treatment would be carried out when jsutified. 12. Maintenance operations would be designed to allow stabilization of cut slopes and establishment of vegetal cover. It is expected that the preconstruction planning phase would play a critical role in preserving esthetic quality by exposing many problems to be avoided. It is at this stage that input from other concerned agencies would be crucial and welcome. The Bureau of Reclamation has learned a great deal about restoration problems from experience and consultation with cooperating agencies. From this experience the Bureau expects to demonstrate greater competence in this aspect of construction. ( c) Miscellaneous Construction Aspects Application of the general criteria explained above would not cover all of the construction situations that would develop. Additional aspects are listed below: 1_. Clearing for the proposed reservoir sites would be accomplished in the following general manner: 461 |