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700 WETLAND REVEGETATION PART 1 PART 2 PART 3 GENERAL This work shall consist of excavating the wetland vegetation and topsoil from the bottom of Goldsmith Gulch, stockpiling the material, and replacing upon the constructed channel bottom after grading operations are completed. The intent of this operation is to promote propagation of wetland vegetation and grasses along the newly constructed Goldsmith Gulch channel. All work shall be completed in accordance with these specifications and in a reasonable close conformity with the lines and thicknesses shown on the Plans or as directed. MATERIALS Vegetation and topsoil to be removed, stockpiled and replaced shall consist of the existing natura'l wet'land vegetation such as Sandbar Willow, three-square, reed canary gr'a,;s, broad-leaved cattail, and all other grasses or willows within the designated channel area. CONSTRUCTION Materials for removal shall be excavated and stockpiled when necessary a'long the project at locations designated by t:,e Engineer. Excavated wetland vegetation and topsoil shall be placed directly upon the constructed Goldsmith Gulch Channel bottom without the use of stockpiles whenever conditions and the progr'ess of construction will permit. Wetlands vegetation and topsoil shan not be placed until the areas to be revegetated have been propery prepared and grading operation in the area have been completed. Before excavation, existing wetland:; vegetation, trees and willows shall be cut back or pruned prior to removal during the clearing and grubbing operation. The wetland channel bottom shall then be stripped to a depth of twelve (12) inches or as directed by the Engineer. This material shall be stockpiled and protected from erosion by applying a straw mulch to the stOCkpile. An organic tackifier such as "M" Binder, R2400, or approved equal shall be applied to the straw mulch as a binder. After channel grading has been COmplE!ted, the Contractor shall replace the stripped material back on the channel bottom to meet thE' lines and grades as shown on the Plans. FiniSh grading of the material shall be completed to prepare the channel bottom for wetland seeding and planting. Final finished grading and prepay'ation of the channel bottom shall be achieved by harrowing until the surfacE' is smooth, friab'le, and of uniform, fine texture and compaction, having no lumps or stones over three (3) inches. The depth of stripped material placed back on the channel shall be 4" minimum.