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VM <br />■ Completely excavate and grade the new channel before fall and winter rains (before <br />October 31). Earthen dams must remain at both points of connection to the existing <br />channel (Figure 3-2). Construct erosion -control measures, completely in place, before <br />October 31. <br />• • • • , •,. • •. , . , • <br />■ Open the downstream dam before the winter rains (before November 30) to allow <br />pressure to equalize between the new channel and the existing channel. <br />.. • the upstream fam after the heavy spring flows (before April 30) to establish• <br />summer flows into the upstream diversion point in the new channel. These flows will <br />gradually • the followingseason. <br />Construct permanent dam structurethe upstream channel diversion point during <br />the <br />dry season (before October 31) followed by construction of a second permanent dam <br />structure at thedownstreamdiversion point. <br />n Complete dewatering and earthen fill and stabilization operations for the existing channi <br />before the start of the rainy season (before October 3 1). <br />IAWK611111111111TAIJ, <br />Within 60 days of completion of mitigation construction, the City will submit to the Co <br />records <br />.. • 1 F "as-built"drawings documenting theconstructed channel <br />realigrunent, <br />• t:1 i <br />topography,andmitigationplantings. The <br />topography •the mitigation be delineated <br />-foot• 1 <br />Maintenance of planted material will include checking each planting location once every <br />2 weeks during the first year's growing season (March 1 -June 1) to examine plant vigor, plant <br />protection devices, weed growth, the stability of watering basins. Maintenance of native -grass cover <br />crop will include eradicating exotic and noxious weeds, protecting embankments and ditches from <br />erosion, and protecting seeded areas from vehicular c. Irrigation system maintenance will include <br />clearing weeds around the overhead spray sprinklers, cleaning sprinkler heads and drip emitters as <br />necessary, repairing damaged potions of the system, and ensuring that each plant is receiving <br />adequate irrigation. <br />Wetland Mitigation and Monitoring Plan for the Chapter 3. Wetland Mitigation and Monitoring Plan <br />Austin Road landfill Expansion. <br />U. S. Armc Corps of Engineers File 199400974 <br />Cin" of Stockton 3-6 April S. 1996 <br />F <br />