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CHAPTER III ALTERNATIVES system and dams. A construction material site plan would be developed for each area. No new access roads would be constructed on public lands, and existing access roads would be maintained in good condition. Topsoil would be stripped to a depth of 4 to 6 inches and stockpiled at the construction material sites. Buffer zones between these sites and washes would be established in cooperation with the Bureau of Land Man- agement, and drainage systems would not be blocked. Following use of the areas, the ground would be sloped to conform to natural contours, topsoil would be returned, and the area would be reseeded. Seeding would be done in the fall and would include species such as Galleta grass, Indian ricegrass, shadscale, fourwing saltbush, Castle Valley clover saltbush, and Canbar Canby bluegrass. Because most of the areas are on land administered by the Bureau of Land Management, that agency would stipulate conditions for the landscaping and reseeding to be accomplished by the Bureau of Reclamation. The Bureau of Reclamation and the Bureau of Land Management have signed a cooperative agreement that stipulates reseeding where necessary. The areas would be considered to be satis- factorily reclaimed when (1) soil erosion resulting from the operations has been stabilized, (2) a vegetative cover at least equal to that pres- ent before disturbance has been established, and (3) a plant species composition at least as desirable as that present before disturbance has been established. Rights-of-way Government Highline Canal and Lateral System Reclamation's rights-of-way include easements and withdrawn and fee land for the canal and laterals under the Government Highline Canal ,and lateral system. Rights-of-way for existing canals and associated struc- tures constructed by the United States were either obtained under the Congressional Act of August 30, 1890, were purchased outright, or were withdrawn from the public domain. In addition to rights established by this act, Reclamation holds reserved rights-of-way for the laterals, granted by terms specified in the water stock subscriptions issued by the Grand Valley Water Users Association. When these subscriptions were signed, owners granted to Reclamation the rights-of-way needed for the construction and operation and maintenance of irrigation works. No additional rights-of-way would be obtained for the 38 miles of the Government Highline Canal except where possible realignment would be necessary. In general, the installation of the proposed membrane lining would be contained within the widths presently used. The average width of the Government Highline Canal right-of-way, which includes the entire area needed to perform operation and maintenance work, is presently es- timated at 125 feet and encompasses approximately 606 acres. A large portion of the area needed for the proposed detention dike and ditch systems and the moss and debris removal structures would be satisfied by a portion of the canal right-of-way presently used. Addi- tional land would be obtained where the detention dikes, ditches, and dams are not constructed near the canal; the additional acreage necessary 31