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I 1 Facilities at the diversion include a concrete weir, a series of screened intake structures, an intake channel, a settling channel, and a pump house. I Water flows over the weir into a stilling basin created by a concrete apron. The stilling basin is the width of the river. The presence of the weir and the basin creates a barrier to upstream fish movement. As t10ws mcrease, the d,tierence in the upstream and downstream water levels IS reduced. Although water levels are reduced, velocities increase and the weir provides an impediment to upstream fish movement. Studies conducted as part of the SJRRJP have shown that some fish are able to move upstream past the weir but their specific method of movement is not known and the number of fish dissuaded from upstream movement by the presence of the weir is also unknown. One possible method of upstream movement could occur during high river flows. When the flow in the San Juan River is above 7,000 cfs, some of the flow goes around the weir. It appears that it would be possible for fish movement to occur at these higher flows. I I I I I A 4-foot by 6-foot sluiceway in the weir located on the north side of the river, is used to sluice the inlet structure of sediment. Normal sluice gate operations have the sluice gate open between 8 and 12 inches. Trash racks and isolation gates are located at the point of diversion. A concrete settling channel about 490 feet long conveys river water to the pump house or returns it to the river. Diverted water moves through traveling screens to three pumps capable in combination of pumping a maximum of 17,000 gallons per minute (37 cfs) to a 110-acre storage reservoir. From the storage reservoir, the water is pumped to the SJGS. I An environmental assessment (EA) is being prepared that will address providing endangered fish passage at the Diversion Weir. USBR is preparing this EA in cooperation with the USFWS to comply with the National Environmental Policy Act, Endangered Species Act, and related U.S. Department of the Interior policies and regulations. If, based on this analysis, USBR concludes the proposed action would have no significant impact on the human environment, preparation of an Environmental Impact Statement would not be required before the action could be implemented. I I Under the preferred alternative, USBR acting on behalf of the Recovery Program, would construct fish passage around the PNM Diversion weir on the south bank of the San Juan River using boulders to create a riffle and pool sequence (Figure 3). The fish passage would be about 400 feet in length. The fish passage entrance would be located downstream of the dam's stilling basin and existing wingwall about 20 to 30 feet below the white water. The fish passage exit would be located about 200 feet upstream of the dam. The passage would consist ofa channel with placed boulders to create a series of boulder drops and stilling pools. I I I The preferred alternative also includes sorting facilities consisting of a trap, crane. storage shed, and sorting table. Portable power would be used to operating the crane and fish sorting facilities. A security system including fencing would also be required. I 8.2 Agreement between the Navajo Nation, PNM, USBR, and the San Juan Dine Water Users I I As part of the process of consultation on ITA issues between the Navajo Nation, PNM, and USBR.the parties identified certain concerns about potential impacts to downstream Navajo irrigation projects from continued diversion by PNM. The Navajo Nation, PNM, USBR, and the San Juan Dine Water Users anticipate finalizing an agreement whereby PNM will make certain mitigation payments to Navajo I I 46 001537