ITEM 23 ATTACHMENT 6 - Project Plans

21 throughout the rest of the Property. These features are all incised due to the highly erosive soils found throughout much of the Property. There was little to no vegetation within the OHWM, but dominant vegetation found along the banks of the features includes wild oat, rattail sixweek grass, and Himalayan blackberry (Rubus armeniacus); with the exception of some widely scattered California buckeye (Aesculus californica), trees were largely absent. . In places where a woody canopy was present, it was dominated with valley oak, coast live oak, and Fremont’s cottonwood. Intermittent Drainage There is one intermittent drainage feature located in the Property, located near the northwest corner. Approximately 255 feet of an intermittent feature enters the Property and then flows north, adjacent to Foothill Road, out of the Property. The feature had a thick overstory of valley oak, coast live oak, and Fremont’s cottonwood, with an understory consisting of Himalayan blackberry, California buckeye, and poison oak (Toxicodendron diversilobum). Non-native Annual Grassland A large majority of the Property is dominated by non-native annual grassland habitat. The grassland habitat is occasionally grazed by sheep and other livestock, but there was tall standing thatch at the time of the August 26, 2021, site visit. Much of this vegetative cover was present in the abandoned English walnut orchard portion of the Property. Since abandonment, approximately half of the trees have died, leaving large, open areas in between the remaining trees. Dominant vegetation observed within this habitat type includes wild oat, rattail sixweek grass, black mustard, Italian thistle (Carduus pycnocephalus), and yellow starthistle (Centaurea solstitialis). Annual grassland habitat located on the Property is highly disturbed and is disked regularly multiple times a year for weed abatement and County required fire abatement. This is due to the Property’s location between two existing residential neighborhoods. Oak Woodland Within the Property, a narrow band of oak woodland habitat occurs west of Foothill Road and along a portion of the southern boundary. The woodland habitat continues west, beyond the Property, up through the Pleasanton Ridge. This habitat type is dominated with an overstory of valley oak, coast live oak, and Fremont’s cottonwood, with an understory that consisted of California buckeye, English ivy (Hedera helix), and grasses and forbs similar to the non-native annual grassland habitat.