expected to remain in the deep channel, the probability of encounter within the lagoon at any given time would be low.

The “headwaters” of Visitacion Creek terminate in the former railyard area to the east of the round house and consist of shallow stagnant drainages which are dry during approximately half of the year. The drainage channels in this vicinity are not suitable for spawning steelhead due to the lack of appropriate spawning substrates and absence of sufficient attracting water flows for steelhead.

Spawning habitat for anadromous fish does not exist within Brisbane Lagoon or within the tributary channels to the lagoon. Guadelupe Creek does not provide spawning habitat because it is located underground within culverts for significant portions of its length to the west of the outfall at the northwest corner of the lagoon. The unnamed drainage that enters the southern corner of the lagoon likewise runs through underground storm drain culverts which have eliminated the potential for spawning habitat to occur upstream from the lagoon.

Although species-specific surveys for steelhead were not conducted and there have been no documented occurrences of this species in the vicinity of the Project Site, individuals of the species could gain access to the lagoon via the box culvert that connects the Project Site to the Bay. These individuals could potentially use the lagoon for foraging. Therefore, for the purposes of this analysis the species is presumed to be present at least on an occasional basis.

Sacramento River winter-run, and Central Valley spring-run, and Central Valley fall/late fall-run Chinook salmon (Oncorhynchus tshawytscha) Federally Endangered, and California Threatened Endangered. The population of Chinook salmon in San Francisco Bay consists of three four, more-or-less, distinct races: winter-run, spring-run, and fall run, and /late fall-run (Williams 2012). Sacramento River winter-run Chinook salmon, listed as endangered by both the state and the federal government, migrate through San Francisco Bay from December through July with a peak in March (Moyle, 2002). These races are distinguished by the seasonal differences in adult upstream migration, spawning, and juvenile downstream migration. Chinook salmon are anadromous fish, spending three to five years at sea before returning to fresh water to spawn. These fish pass through San Francisco Bay waters to reach their upstream spawning grounds. In addition, juvenile salmon migrate through the Bay en route to the Pacific Ocean.

The steelhead and Adult chinook typically occur in the Bay waters north and east of the Project Site during in-migration to freshwater, gravel-bed