Common use of Importance Clause in Contracts

Importance. The mainstem Colorado River from Rifle, Colorado, to Lake Xxxxxx, Utah, supports populations of humpback chub, razorback sucker, and Colorado pikeminnow, and is recognized as important to the recovery of all four endangered fishes (U.S. Fish and Wildlife Service 1990a, 1990b, 1991, 1998, 2002a, 2002b, 2002c, 2002d). Relatively dense populations of humpback chub occur at Black Rocks and Westwater canyons near the Utah-Colorado state line. Both populations experienced a decline around the year 2000 and remained low for over a decade (Xxxxxxx 2012; Xxxxxxx and XxXxx 2011). Populations in both Black Rocks and Westwater stabilized in 2011-2012 and preliminary estimates from sampling in 2016-2017 show signs of population increases (Xxxxxxx et al. 2016, Xxxxx et al. 2016, X. Xxxxxxx and X. Xxxxx, unpublished data). Population estimates resumed in 2020 in Westwater Canyon and will resume in Black Rocks in 2021. A small but persistent humpback chub population occurs in Cataract Canyon where some of the last wild bonytail in the Colorado River were collected. All life stages of Colorado pikeminnow occur in the section of river from Palisade, Colorado, downstream to Lake Xxxxxx. Numbers of adult Colorado pikeminnow fluctuated around 600 fish from 1992 to 2008 (Osmundson and White 2009), but have declined since. The most recent population estimates (collected in 2013 - 2015) indicate the adult population has declined to about 400 individuals, among the lowest estimates on record (Xxxxxxx et al. 2020). Researchers reported strong numbers of subadults and record high catch of age-0 Colorado pikeminnow in 2015. Age-0 catch rates were strong in 2016 and 2018, but were dramatically lower in 2017. Since 2008, with the completion of the Price-Stubb fish passage structure, the endangered fish have regained access to historically occupied reaches of the Colorado River upstream of Palisade, Colorado. Wild razorback sucker populations in the mainstem Colorado River declined precipitously in the early years of the Recovery Program, but stocked individuals have been accumulating over the past decade, with around 8,000 adults estimated in 2015 (Xxxxxxx et al. 2020). Wild-produced age 1+ and 2+ juveniles were collected in the lower Colorado River in 2013, and wild age-0 fish were collected in 2018. Bonytail are stocked in the Colorado River according to the revised Integrated Stocking Plan (Integrated Stocking Plan Revision Committee 2015), but similar to other upper basin locations, their survival appears to be low.

Importance. The mainstem Colorado River from Rifle, Colorado, to Lake Xxxxxx, Utah, supports populations of humpback chub, razorback sucker, chub and Colorado pikeminnow, and is recognized as important to the recovery of all four endangered fishes (U.S. Fish and Wildlife Service 1990a, 1990b, 1991, 1998, 2002a, 2002b, 2002c, 2002d). Relatively dense populations of humpback chub occur at Black Rocks and Westwater canyons near the Utah-Utah- Colorado state line. Both populations appear to have experienced a decline around the year 2000 and remained low for over a decade (Xxxxxxx 2012; Xxxxxxx and XxXxx 2011). Populations in both Black Rocks and Westwater stabilized in 2011-2012 and preliminary estimates from sampling in 2016-2017 show signs of population increases (Xxxxxxx et al. 2016, Xxxxx et al. 2016, X. Xxxxxxx X.Xxxxxxx and X. Xxxxx, unpublished data). Population estimates resumed in 2020 in Westwater Canyon and will resume in Black Rocks in 2021. A small but persistent humpback chub population occurs in Cataract Canyon where some of the last wild bonytail in the Colorado River were collected. All life stages of Colorado pikeminnow occur in the section of river from Palisade, Colorado, downstream to Lake Xxxxxx. Numbers of adult Colorado pikeminnow fluctuated around 600 fish from have remained stable since 1992 to 2008 (Osmundson and White 2009). However, but have declined since. The the most recent (preliminary) population estimates (collected in 2013 - 2015) indicate the adult population has declined to about 400 individuals, among the lowest estimates on record (Xxxxxxx et al. 2020)record. Researchers reported report strong numbers of subadults and record high catch of age-0 Colorado pikeminnow in 2015. Age-0 catch rates were strong in 2016 and 2018, but were dramatically lower in 2017. Since 2008, with the completion of the Price-Stubb fish passage structurestructure (the third of three such capital projects), the endangered fish have regained access to historically occupied reaches of the Colorado River upstream of Palisade, Colorado. Wild razorback sucker populations in the mainstem Colorado River declined precipitously in the early years of the Recovery Program, but stocked individuals have been accumulating over the past decade, with around 8,000 adults estimated in 2015 (Xxxxxxx et al. 2020). Wild-produced age 1+ and 2+ juveniles were collected in the lower Colorado River in 2013, and wild age-0 fish were collected in 2018. Bonytail are stocked in the Colorado River according to the revised Integrated Stocking Plan (Integrated Stocking Plan Revision Committee 2015), but similar to other upper basin locations, their survival appears to be low.

Importance. The mainstem Colorado River from Rifle, Colorado, to Lake Xxxxxx, Utah, supports populations of humpback chub, razorback sucker, chub and Colorado pikeminnow, and is recognized as important to the recovery of all four endangered fishes (U.S. Fish and Wildlife Service 1990a, 1990b, 1991, 1998, 2002a, 2002b, 2002c, 2002d). Relatively dense large populations of humpback chub occur at Black Rocks and Westwater canyons near the Utah-Utah- Colorado state line. Both However, both populations appear to have experienced a decline around the year 2000 and have remained low for over a decade since that time (Xxxxxxx 2012; 2012 and Xxxxxxx and XxXxx 2011). Populations in both Black Rocks and Westwater stabilized in 2011-2012 and preliminary estimates from sampling in 2016-2017 show signs of population increases (Xxxxxxx et al. 2016, Xxxxx et al. 2016, X. Xxxxxxx and X. Xxxxx, unpublished data). Population estimates resumed began again in 2020 2011 and the Recovery Program will consider preliminary results and recommendations from reports currently in Westwater Canyon and will resume preparation in Black Rocks in 2021deciding what steps need to be taken. A small but persistent smaller humpback chub population occurs in Cataract Canyon where some of the last wild bonytail in the Colorado River were collected. All life stages of Colorado pikeminnow occur in the section of river from Palisade, Colorado, downstream to Lake Xxxxxx. Numbers of adult Colorado pikeminnow fluctuated around 600 fish from have remained stable since 1992 to 2008 (Osmundson and White 2009). However, but have declined since. The the most recent (preliminary) population estimates (collected in 2013 - 2015and 2014) indicate the adult population has declined to about 400 individuals, among the lowest estimates estimate on record (Xxxxxxx et alrecord. 2020). Researchers reported strong numbers of subadults and record high catch of age-0 Colorado pikeminnow in 2015. Age-0 catch rates were strong in 2016 have been translocated and 2018, but were dramatically lower in 2017. Since 2008, with stocked into the completion of the Price-Stubb fish passage structure, the endangered fish have regained access to historically occupied reaches upper reach of the Colorado River upstream of Palisadebetween Palisade and Rifle, Colorado; natural access to this historic-habitat reach until recently had been blocked since the early 1900's by three diversion dams near Palisade. Wild razorback sucker populations in the mainstem Colorado River have declined precipitously in the early years past 20 years. Recapture of the Recovery Program, but stocked individuals have been accumulating over the past decade, with around 8,000 adults estimated razorback sucker has increased in 2015 (Xxxxxxx et alrecent years. 2020). Wild-Wild produced age Age 1+ and 2+ juveniles were collected in the lower Colorado River in 2013, and wild age-0 fish were collected in 2018. Bonytail are stocked in the Colorado River according to the revised Integrated Stocking Plan (Integrated Stocking Plan Revision Committee 2015), but similar to other upper basin locations, their survival appears to be low.

Importance. The mainstem Colorado River from Rifle, Colorado, to Lake Xxxxxx, Utah, supports populations of humpback chub, razorback sucker, chub and Colorado pikeminnow, and is recognized as important to the recovery of all four endangered fishes (U.S. Fish and Wildlife Service 1990a, 1990b, 1991, 1998, 2002a, 2002b, 2002c, 2002d). Relatively dense populations of humpback chub occur at Black Rocks and Westwater canyons near the Utah-Utah- Colorado state line. Both populations appear to have experienced a decline around the year 2000 and remained low for over a decade (Xxxxxxx 2012; Xxxxxxx and XxXxx 2011). Populations in both Black Rocks and Westwater stabilized in 2011-2012 and preliminary estimates from sampling in 2016-2017 show signs of population increases (Xxxxxxx et al. 2016, Xxxxx et al. 2016, X. Xxxxxxx X.Xxxxxxx and X. Xxxxx, unpublished data). Population estimates resumed in 2020 in Westwater Canyon and will resume in Black Rocks in 2021. A small but persistent humpback chub population occurs in Cataract Canyon where some of the last wild bonytail in the Colorado River were collected. All life stages of Colorado pikeminnow occur in the section of river from Palisade, Colorado, downstream to Lake Xxxxxx. Numbers of adult Colorado pikeminnow fluctuated around 600 fish from have remained stable since 1992 to 2008 (Osmundson and White 2009). However, but have declined since. The the most recent (preliminary) population estimates (collected in 2013 - 2015) indicate the adult population has declined to about 400 individuals, among the lowest estimates on record (Xxxxxxx et alrecord. 2020). Researchers reported However, researchers report strong numbers of subadults and record high catch of age-0 Colorado pikeminnow in 2015. Age-0 catch rates were remained strong in 2016 and 20182016, but were dropped off dramatically lower in 2017. Since 2008, with the completion of the Price-Stubb fish passage structurestructure (the third of three such capital projects), the endangered fish have regained access to historically occupied reaches of the Colorado River upstream of Palisade, Colorado. Wild razorback sucker populations in the mainstem Colorado River declined precipitously in the early years of the Recovery Program, but stocked individuals have been accumulating over the past decade, with around 8,000 adults estimated in 2015 (Xxxxxxx et al. 2020). Wild-produced age Age 1+ and 2+ juveniles were collected in the lower Colorado River in 2013, and wild age-0 fish were collected in 2018. Bonytail are stocked in the Colorado River according to the revised Integrated Stocking Plan (Integrated Stocking Plan Revision Committee 2015), but similar to other upper basin locations, their survival appears to be low.

Importance. The mainstem Colorado River from Rifle, Colorado, to Lake Xxxxxx, Utah, supports populations of humpback chub, razorback sucker, chub and Colorado pikeminnow, and is recognized as important to the recovery of all four endangered fishes (U.S. Fish and Wildlife Service 1990a, 1990b, 1991, 1998, 2002a, 2002b, 2002c, 2002d). Relatively dense large populations of humpback chub occur at Black Rocks and Westwater canyons near the Utah-Utah- Colorado state line. Both However, both populations appear to have experienced a decline around the year 2000 and have remained low for over a decade since that time (Xxxxxxx 2012; Xxxxxxx and XxXxx 2011). Populations Population estimates began again in both Black Rocks 2011 and Westwater stabilized in 2011-2012 the Recovery Program will consider results and preliminary estimates recommendations from sampling in 2016-2017 show signs of population increases (Xxxxxxx et al. 2016, and Xxxxx et al. 2016, X. Xxxxxxx and X. Xxxxx, unpublished data). Population estimates resumed 2016 in 2020 in Westwater Canyon and will resume in Black Rocks in 2021deciding what steps need to be taken. A small but persistent smaller humpback chub population occurs in Cataract Canyon where some of the last wild bonytail in the Colorado River were collected. All life stages of Colorado pikeminnow occur in the section of river from Palisade, Colorado, downstream to Lake Xxxxxx. Numbers of adult Colorado pikeminnow fluctuated around 600 fish from have remained stable since 1992 to 2008 (Osmundson and White 2009). However, but have declined since. The the most recent (preliminary) population estimates (collected in 2013 - 2015) indicate the adult population has declined to about 400 individuals, among the lowest estimates on record (Xxxxxxx et alrecord. 2020). Researchers reported However, researchers report strong numbers of subadults and record high catch of age-0 Colorado pikeminnow in 2015. Age-0 catch rates were strong in 2016 and 2018, but were dramatically lower in 2017. Since 2008, with the completion of the Price-Stubb fish passage structurestructure (the third of three such capital projects), the endangered fish have regained access to historically occupied reaches of the Colorado River upstream of Palisade, Colorado. Wild razorback sucker populations in the mainstem Colorado River declined precipitously in the early years of the Recovery Program, but stocked individuals have been accumulating over the past decade, with around 8,000 adults estimated in 2015 (Xxxxxxx et al. 2020). Wild-Wild- produced age Age 1+ and 2+ juveniles were collected in the lower Colorado River in 2013, and wild age-0 fish were collected in 2018. Bonytail are stocked in the Colorado River according to the revised Integrated Stocking Plan (Integrated Stocking Plan Revision Committee 2015), but similar to other upper basin locations, their survival appears to be low.