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<br />o <br />'-.) <br />~:J <br /> <br />., <br />,." <br />CD <br />r-' <br /> <br />9 <br /> <br />1. <br />2. <br />3. <br />4. <br />5. <br />6. <br />7. <br />8. <br /> <br />Lake Powell influence (RM 0 to RM 14) <br />Canyon (RM 15 to RM 67) <br />Chinle to Aneth (RM 68 to 105) <br />Aneth to Mixer (RM 106 to RM 130) <br />Mixer to Hogback (RM 131 to RM 154) <br />Hogback to Animas (RM155 to RM 180) <br />Animas to Blanco (RM 181 to RM 213) <br />Blanco to Navajo Dam (RM 214 to RM 224) <br /> <br />Based on the habitat analyses reported in Bliesner and Lamarra (1995). there would appear <br />to be habitats above the known spawning area (the Mixer) and the low velocity habitats <br />downstream of the Mixer that share similar characteristics to these areas. These similarities <br />may possibly support spawning areas further upstream in the San Juan River, together with <br />habitats suitable for larval and young Colorado squawfish. <br /> <br />As previously stated, Colorado squawfish spawn July 1 to September 1 in cobble/gravel areas <br />typically found in riffle/run habitats. Following hatch, larval Colorado squawfish drift <br />downstream to low velocity habitats. Important habitats during summer low flow (August) <br />are the San Juan's backwaters and secondary channels, used by larvae and young Colorado <br />squawfish. During 1995 investigations under the San Juan Recovery Implementation <br />Program, low velocity habitats were more common in August than June and comprised a <br />greater percentage of total habitat upstream from RM 110 than downstream. Low velocity <br />habitats peaked in abundance between RM 120 and RM 180 (Holden and Masslich 1995). <br /> <br />D. INTERRELATIONSHIPS WITH OTHER PROJECTS OR PROPOSALS <br /> <br />The proposed plan has been formulated to complement and support the ongoing research <br />effort for the Implementation Program. The Program itself was established to foster such <br />research and coordinate the numerous activities ongoing and proposed for the San Juan River <br />Basin with potential to impact the endangered fish species. Other activities that may occur <br />in the Basin include, but are not limited to, the U.S. Army Corps of Engineers' permitting <br />responsibilities for dredge and fill activities in waters of the Untied States through section 404 <br />of the Clean Water Act, each respective State and Tribal resource -agency's responsibilities <br />for management and protection of resident fish and wildlife resources, and other Federal, <br />State, and Tribal lan"d management entities with responsibilities within the Basin. <br /> <br />II. ALTERNATIVES <br /> <br />A. NO ACTION <br /> <br />Under a No Action alternative, the experimental stocking plan would not be implemented. <br />Other research commitments of the Implementation Program now underway would continue <br />and other, less timely and less efficient methods would be employed to gain the required <br />information on the species in the Basin. <br />