Surface Water Resources. Halls Pond is a surface water feature located immediately north of the Project ROW at Hempstead Avenue between the intersections of Nassau Boulevard [west] and Eagle Avenue [east]). The pond is classified as PUBHx (Palustrine, Unconsolidated Bottom, Permanently Flooded, Excavated) on U.S. Fish & Wildlife Service (“USFWS”) National Wetland Inventory (“NWI”) Maps. The waterbody draining Halls Pond, known as Pines Stream, flows under Hempstead Avenue within a concrete-lined culvert with a riprap stream bed. The Project will cross Pines Stream at this location. The duct bank will be installed across Pines Stream along a route adjacent to and approximately parallel to Hempstead Avenue using open cut trenching methods at a minimum 48-inch depth of burial. A site-specific erosion and sediment control plan has been prepared for the crossing of Pines Stream and is depicted on the Plan and Profile Drawings. A description of the construction sequencing, as well as a Contingency Plan, are provided in Section 6.16.
Surface Water Resources. Affected Environment Regional Surface Water Features Sacramento River The Sacramento River is located approximately 0.6 mile east of the eastern boundary of Xxxxxxx Ranch (See Exhibit 2-3). The Sacramento River is approximately 400 miles long and generally flows in a north to south direction through the northern Central Valley of California, between the Pacific Coast Ranges and the Sierra Nevada. The chief tributaries to the Sacramento River are the Pit, Feather, XxXxxxx and American rivers. The Sacramento River Basin produces about two-thirds of the surface water supply of the Central Valley. Average annual runoff is approximately 22.4 million af (USGS 2009, p. 3). The most intensive runoff originates in the upper watershed of the Sacramento River upstream of Lake Shasta (approximately 145 miles north of Xxxxxxx Ranch) and on the waterways originating on the west slope of the Sierra Nevada and Cascade Mountains. Average daily discharge (between 1949 and 2009) of the Sacramento River is 23,490 cubic feet per second (cfs) (USGS 2009, p. 3). The American River joins the Sacramento River approximately 3 miles downstream of Xxxxxxx Ranch, immediately north of the City of Sacramento. The Sacramento River continues south to the Sacramento-San Joaquin River Delta, where it commingles with flows from other eastside waterways, flows from the San Joaquin River basin, and tidal water from the San Francisco Bay. Currently, Xxxxxxx Ranch receives surface water from the Sacramento River via a surface water pumping station located just north of the I-5 river crossing. Diversions from the Sacramento River by CPG during 2009 totaled 46,634 af. During the critical months (July through September) of 2009, which was a Term 91 period, CPG fully exercised its maximum allowable quantity by diverting 13,452 af (its maximum Sacramento River water right) and purchasing an additional 874 af from another Central Valley Project (CVP) contractor.
