Agmt17 City of Menlo Park - Atherton Channel maintenance

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Notification #1600-2013-0356-R3 Streambed Alteration Agreement page 22 of 23 Authorized Activities: A. Vegetation Management: A.1. Woodv and Herbaceous Veaetation. Parts of woody and herbaceous plants, fallen trees, or trunks and limbs lodged in the bed or bank of the creek may be removed if such vegetation is causing streamflow restriction. Woody vegetation may be removed with a winch and cable. The main body of any heavy equipment used shall be operated from the top of bank. Root structures shall not be disturbed and the debris shall be disposed of at a location where it cannot re-enter State waters, A.2. Removal of Native Trees and Shrubs. Trees and shrubs (dead, dying or live) that are less than four (4) inches diameter at breast height (dbh) may be removed if these trees are located below the Ordinary High Water Mark of the Channel, and are restricting flow capacity and causing erosion or flooding. A.3. Removal of Non-native Trees and Shrubs. Non-native shrubs such as giant reed (Arundo donax), Scotch broom (Genista monspessulana), French broom (Cytisus scoparius) and pampas grass (Cortaderia selloana) may be removed in order to maintain channel capacity and improve native riparian habitat. Non- native trees such as Eucalyptus spp. and tree -of -heaven (Ailanthus altissima) that are less than four (4) inches dbh may also be removed. The root mass of any tree or shrub removed shall be left in place to maintain bank stability. A.4. Habitat Enhancement. Channel habitat may be enhanced with activities such as planting of native trees and shrubs that are appropriate to the local area and maintenance of the enhancement plantings. B. Debris and Sediment Removal B.1. Removal Quantities. A one-time removal of a large quantity of sediment and debris, as stated below, at each site in the channel and around the bridges and culverts. After this one time removal, annual removal of small amounts of debris and sediment from within the channel and around bridges and culverts according to the following limits: B.1.1. Site 1. Haven Avenue to Bayshore. Permittee shall be authorized to remove up to 600 cubic yards (cy) of sediment as one continuous activity within the 1000 linear -foot (If) reach in years 2015, 2017 and 2019. B.1.2. Site 2. Concrete -lined channel between Marsh Road and Rolison Road. Permittee shall be authorized to remove up to 200 cy of sediment as one continuous activity; limited to 750 If of the creek channel.