Common use of Fish Distribution - General Clause in Contracts

Fish Distribution - General. Fish survey data is primarily available for only the headwater reaches of the Watercourses With Headwaters (green) within the drainage districts. Very limited fish survey data is available for the lowland reaches of the Watercourses With Headwaters (green) and for Watercourses Without Headwaters (magenta). Fish survey data has not been collected for Artificial Watercourses (yellow). In addition to fish originating from this watercourse type, it is generally assumed that between February and July, fish from other watercourses may immigrate from the estuary into the lower reaches of the watercourse via the culvert/tide gates to forage on available prey. It is generally assumed that the upstream distribution and duration of residence for these immigrating fish is limited by water quality, prey availability and their physiological affinity for salt water. In addition to salmonid species, forage fish species such as surf smelt and sand xxxxx also use the estuary habitats for rearing and could potentially immigrate into the lower reaches of the watercourse. Adult native char and cutthroat could also be expected to immigrate into the lower reaches of the watercourse in pursuit of juvenile salmon and forage fish species. Generally elevated water temperatures found in these low land systems have also led to colonization by exotic species of fish that prefer warm water habitats. Surveys have identified Pumpkinseed, Crappie, and Smallmouth Bass, among others, as being year around residents in the lower reaches of these systems. Many of these warm water species are voracious predators and could be considered deleterious to salmonid productivity. estuary into the lower reaches of this watercourse type via the culvert/tide gates to forage on available prey. It is generally assumed that the upstream distribution and duration of residence for these immigrating fish is limited by water quality, prey availability and their physiological affinity for salt water. Fish survey data has not been collected for the watercourses within the jurisdictional boundaries of DID #18 (Figure 4). It is presumed that the presence of cold water fish species is very limited in the watercourses of DID #18 for the following reasons: a. DID #18 does not include a Watercourse With Headwaters (green) and therefore does not have spawning or resident populations of fish. b. The upstream passage of adult and juvenile fish through the tidegates in DID #18 is restricted to very narrow windows of the tide cycles during which the tide gate is open and the discharge velocity does not exceed the upstream swimming capabilities of the individual fish. c. The upstream distribution and duration of residence of fish immigrating upstream of the tidegates in DID #18 is limited by water quality, prey availability and their physiological affinity for salt water.

Fish Distribution - General. Fish survey data is primarily available for only the headwater reaches of the Watercourses With Headwaters (green) within the drainage districts. Very limited fish survey data is available for the lowland reaches of the Watercourses With Headwaters (green) and for Watercourses Without Headwaters (magenta). Fish survey data has not been collected for Artificial Watercourses (yellow). distribute themselves to suitable rearing habitats in the watercourse. Anadromous juvenile Coho and Cutthroat generally spend 22 to 18 months rearing in freshwater before migrating to the marine environment. Generally, juvenile anadromous Coho and Cutthroat are present in the accessible reaches of the watercourse throughout the year. Resident adult and juvenile Cutthroat are typically present in the upper reaches of the watercourses throughout the year. In addition to fish originating from this watercourse type, it is generally assumed that between February and July, fish from other watercourses may immigrate from the estuary into the lower reaches of the watercourse via the culvert/tide gates to forage on available prey. It is generally assumed that the upstream distribution and duration of residence for these immigrating fish is limited by water quality, prey availability and their physiological affinity for salt water. In addition to salmonid species, forage fish species such as surf smelt and sand xxxxx also use the estuary habitats for rearing and could potentially immigrate into the lower reaches of the watercourse. Adult native char and cutthroat could also be expected to immigrate into the lower reaches of the watercourse in pursuit of juvenile salmon and forage fish species. Generally elevated water temperatures found in these low land systems have also led to colonization by exotic species of fish that prefer warm water habitats. Surveys have identified Pumpkinseed, Crappie, and Smallmouth Bass, among others, as being year around residents in the lower reaches of these systems. Many of these warm water species are voracious predators and could be considered deleterious to salmonid productivity. estuary into the lower reaches of this watercourse type via the culvert/tide gates to forage on available prey. It is generally assumed that the upstream distribution and duration of residence for these immigrating fish is limited by water quality, prey availability and their physiological affinity for salt water. Fish survey data has not been historically collected only in Reach 4 of Big Indian Slough (Figure 6) and in Upper Xxxxxxx Slough. The fish survey data for Big Indian Slough indicate the watercourses within the jurisdictional boundaries presence of DID #18 Chinook salmon and Coho salmon (Figure 4) (Table 4). It is presumed that Cutthroat trout were also been observed in Reach 4 of Big Indian Slough on one occasion (personal communication with Xxxx Xxxxxxxx, 2007). The fish survey data for Upper Xxxxxxx Slough (Data No. 5) indicate the presence of cold water fish species is very limited in the watercourses of DID #18 for the following reasons: a. DID #18 does not include a Coho salmon (Figure 4) (Table 4). Data No. Watercourse With Headwaters (green) and therefore does not have spawning or resident populations of fish. b. The upstream passage of adult and juvenile fish through the tidegates in DID #18 is restricted to very narrow windows of the tide cycles during which the tide gate is open and the discharge velocity does not exceed the upstream swimming capabilities of the individual fish. c. The upstream distribution and duration of residence of fish immigrating upstream of the tidegates in DID #18 is limited by water qualityFish Species Observer Observations 1 Unnamed Coho, prey availability and their physiological affinity for salt water.Chinook KB 1 2 Unnamed Coho KB 1 3 Unnamed Coho KB 3 4 Unnamed Coho KB 3 5 Unnamed Coho KB 3 6 Unnamed Coho BB 1

Fish Distribution - General. Fish survey data is primarily available for only the headwater reaches of the Watercourses With Headwaters (green) within the drainage districts. Very limited fish survey data is available for the lowland reaches of the Watercourses With Headwaters (green) and for Watercourses Without Headwaters (magenta). Fish survey data has not been collected for Artificial Watercourses (yellow). present and accessible. Coho spawn in the late fall and Cutthroat spawn in early spring. Coho adults die after spawning whereas Cutthroat can survive to spawn in successive years. Anadromous adult Cutthroat that survive spawning out migrate the watercourse from mid to late spring. After hatching from gravel nests (redds), emerging juvenile Coho and Cutthroat will distribute themselves to suitable rearing habitats in the watercourse. Anadromous juvenile Coho and Cutthroat generally spend 22 to 18 months rearing in freshwater before migrating to the marine environment. Generally, juvenile anadromous Coho and Cutthroat are present in the accessible reaches of the watercourse throughout the year. Resident adult and juvenile Cutthroat are typically present in the upper reaches of the watercourses throughout the year. In addition to fish originating from this watercourse type, it is generally assumed that between February and July, fish from other watercourses may immigrate from the estuary into the lower reaches of the watercourse via the culvert/tide gates to forage on available prey. It is generally assumed that the upstream distribution and duration of residence for these immigrating fish is limited by water quality, prey availability and their physiological affinity for salt water. In addition to salmonid species, forage fish species such as surf smelt and sand xxxxx also use the estuary habitats for rearing and could potentially immigrate into the lower reaches of the watercourse. Adult native char and cutthroat could also be expected to immigrate into the lower reaches of the watercourse in pursuit of juvenile salmon and forage fish species. Generally elevated water temperatures found in these low land systems have also led to colonization by exotic species of fish that prefer warm water habitats. Surveys have identified Pumpkinseed, Crappie, and Smallmouth Bass, among others, as being year around residents in the lower reaches of these systems. Many of these warm water species are voracious predators and could be considered deleterious to salmonid productivity. estuary into the lower reaches of this watercourse type via the culvert/tide gates to forage on available prey. It is generally assumed that the upstream distribution and duration of residence for these immigrating fish is limited by water quality, prey availability and their physiological affinity for salt water. Fish survey data has not been collected for the watercourses within the jurisdictional boundaries of DID #18 (Figure 4)15. It is presumed that the presence of cold water fish species is very limited in the watercourses of in DID #18 15 for the following reasons: a. DID #18 15 does not include a Watercourse With Headwaters (green) and therefore does not have spawning or resident populations of fish. b. The upstream passage of adult and juvenile fish through the tidegates in DID #18 15 is restricted to very narrow windows of the tide cycles during which the tide gate is open and the discharge velocity does not exceed the upstream swimming capabilities of the individual fish. c. The upstream distribution and duration of residence of fish immigrating upstream of the tidegates in DID #18 15 is limited by water quality, prey availability and their physiological affinity for salt water.

Fish Distribution - General. Fish survey data is primarily available for only the headwater reaches of the Watercourses With Headwaters (green) within the drainage districts. Very limited fish survey data is available for the lowland reaches of the Watercourses With Headwaters (green) and for Watercourses Without Headwaters (magenta). Fish survey data has not been collected for Artificial Watercourses (yellow). In addition to fish originating from this watercourse type, it is generally assumed that between February and July, fish from other watercourses may immigrate from the estuary into the lower reaches of the watercourse via the culvert/tide gates to forage on available prey. It is generally assumed that the upstream distribution and duration of residence for these immigrating fish is limited by water quality, prey availability and their physiological affinity for salt water. In addition to salmonid species, forage fish species such as surf smelt and sand xxxxx also use the estuary habitats for rearing and could potentially immigrate into the lower reaches of the watercourse. Adult native char and cutthroat could also be expected to immigrate into the lower reaches of the watercourse in pursuit of juvenile salmon and forage fish species. Generally elevated water temperatures found in these low land systems have also led to colonization by exotic species of fish that prefer warm water habitats. Surveys have identified Pumpkinseed, Crappie, and Smallmouth Bass, among others, as being year around residents in the lower reaches of these systems. Many of these warm water species are voracious predators and could be considered deleterious to salmonid productivity. estuary into the lower reaches of this watercourse type via the culvert/tide gates to forage on available prey. It is generally assumed that the upstream distribution and duration of residence for these immigrating fish is limited by water quality, prey availability and their physiological affinity for salt water. Fish survey data has not been collected for the watercourses within the jurisdictional boundaries of DID #18 (Figure 4)5. It is presumed that the presence of cold water fish species is very limited in the watercourses of in DID #18 5 for the following reasons: a. DID #18 5 does not include a Watercourse With Headwaters (green) and therefore does not have spawning or resident populations of fish. b. The upstream passage of adult and juvenile fish through the tidegates in DID #18 5 is restricted to very narrow windows of the tide cycles during which the tide gate is open and the discharge velocity does not exceed the upstream swimming capabilities of the individual fish. c. The upstream distribution and duration of residence of fish immigrating upstream of the tidegates in DID #18 5 is limited by water quality, prey availability and their physiological affinity for salt water.