Section 3 Covered Activities and Their Impacts
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SECTION 3 COVERED ACTIVITIES AND THEIR IMPACTS 3.0 COVERED ACTIVITIES This chapter also describes how the Covered Activities may affect the Covered Species. The estimation of take that could AND THEIR IMPACTS occur after implementation of the take avoidance and minimi- zation measures is provided in Section 5.3 of the HCP. As part of the HCP, Stanford is seeking a Section 10(a) inci- dental take permit from the Service and NOAA Fisheries. An incidental take permit can be issued for one-time site-specific 3.1 “LAKE” WATER SYSTEM activities or projects, or for a broader program of multiple ongoing or annual maintenance activities. Stanford is seeking Stanford University operates a dual water supply system that the latter type of incidental take permits that will allow it to provides both potable and non-potable water to the campus. operate and develop the University, and perform the Covered The dual water system provides operational flexibility, reliabil- Activities described below. ity, and cost efficiency for the University. The San Francisco Public Utilities Commission Water Department (SFPUC) This section describes the Covered Activities that Stanford rou- supplies Stanford with potable water. The potable water sup- tinely performs, including the construction of new facilities. All ply is chloraminated for disinfection by the SFPUC. Stanford of the activities described below are Covered Activities, unless also maintains groundwater wells that are routinely monitored the HCP specifically excludes them from coverage. The Covered and are of potable-water quality. The non-potable water supply Activities include activities related to water management, aca- currently is used mainly for irrigation and as a backup to po- demic uses, maintenance and construction of urban infrastruc- table water for fire protection. The non-potable water system ture, recreational and athletic uses, general campus management is referred to as the Lake water system, and is made up of water and maintenance, activities that are carried out by Stanford’s diversions from Los Trancos Creek, San Francisquito Creek, tenants, and future development. All of these activities are neces- and Searsville Reservoir, and occasionally supplemented by sary to keep the University operating, and most of these activities the wells. Lake water is stored in Felt Reservoir and Searsville have been ongoing for many years. These activities represent Reservoir (Fig. 3-1 and 3-2). Although non-potable, Lake wa- the type of University operations that could affect the Covered ter could be treated and made available for human use in case Species, and allow the University to analyze the potential effect of an emergency. of its operations on the Covered Species. But, because of the size and diversity of operations, and the changes in technology that The Stanford Utilities Division, which is part of the University are continually occurring, it is not possible to describe all of the Facilities Operations Department, is responsible for the plan- University’s actions in complete detail. Section 4.0 of the HCP ning, operation, and maintenance of the domestic water supply, describes the Conservation Program that will avoid or minimize Lake water, chilled water/steam system, and the sanitary sewer the take of Covered Species caused by the Covered Activities. and storm drainage systems. These systems include many components, such as water diversion facilities, creek monitoring This section describes many activities that individually pres- devices, dams, reservoirs, deep wells, over 200 miles of water, ent a very low chance of causing either direct or indirect take of sewer and drainage piping, open channels, fire hydrants, man- Covered Species. When viewed cumulatively, however, these holes, and meters. All of these water management facilities and common activities likely do result in take, and if this take is not activities are needed to support academic research and a daily minimized or mitigated for, it could, over time, have a potentially population of about 30,000-35,000 people. significant effect on the Covered Species. The HCP is designed to benefit the Covered Species and increase the likelihood of 3.1.1 Water Diversions their persistence at Stanford. If the HCP is successful, the Covered Species populations at Stanford will increase, and, as Stanford University holds riparian and pre- and post-1914 ap- the Covered Species become more abundant, they will inhabit propriative water rights and licenses that entitle the University more areas at Stanford. Although this will provide a significant to divert water from Los Trancos Creek, San Francisquito benefit to the Covered Species, the number of individuals of the Creek, and Searsville Reservoir. Stanford currently exercises Covered Species that are taken, particularly while conducting these water rights by operating the following water diversion routine activities could increase when the Covered Species start facilities: 1) the Los Trancos diversion located on Los Trancos inhabiting areas that are currently uninhabited. The percentage Creek; 2) a pump station1 on San Francisquito Creek at the of the local populations impacted, however, will remain the same Stanford golf course; and 3) the Searsville Dam diversion or will decrease as the overall population of Covered Species con- (Fig. 3-2). Felt Reservoir is the largest storage reservoir in the tinues to increase. Stanford Lake water system. Therefore, while any one of the Covered Activities, at any given Water from Los Trancos Creek is diverted by an in-stream time, may not result in the take of Covered Species, they are all structure located on Los Trancos Creek just downstream from considered Covered Activities because on a cumulative basis they There are two sets of pumps on San Francisquito Creek; these are re- could result in take. ferred to as the Felt pumps and the Lagunita pumps, and are combined into one facility. Section 3 page 45 the Stanford property boundary near Arastradero Road. The soon enough to complete the physical modifications to the di- Los Trancos Creek diversion facility includes a small diversion version structures by the fall of 2008, which will allow Stanford dam, a by-pass channel, fish ladder, screen, and a concrete-lined to begin implementing the new operational protocols during conveyance channel (flume). From this structure, the water is the winter of 2008-2009. The physical presence of the cur- contained in the flume and flows by gravity to Felt Reservoir rent facilities, ongoing operation of the current facilities, and (Fig. 3-2). To facilitate fish passage the structure was modified the maintenance associated with the current facilities, will be in the mid-1990s, using a design provided by the California Covered Activities under this HCP, until the modified facilities Department of Fish and Game. The modified structure im- are built and the modified operating and maintenance protocols proved fish passage and helped prevent the diversion of fish are implemented. The HCP therefore describes the current into the conveyance flume. However, the current fish ladder water diversion facilities, maintenance, and operations, and the and screen are highly labor intensive, negatively affect diver- modified diversion facilities, maintenance, and operations. sion operations, and have resulted in a reduction in the amount of water that can be diverted from Los Trancos Creek to Felt 3.1.1.1 Potential Effects of the Current Water Reservoir, particularly during high flows. Diversions on the Covered Species Stanford, in consultation with NOAA Fisheries and the Stanford’s diversion facilities were modernized during the California Department of Fish and Game, studied ways to 1990s to protect steelhead. Physical and operational changes enhance conditions for steelhead through improvements to the were made at this time. The physical changes to the facilities water diversion facilities. The proposed structural modifica- included the installation of fish screens and ladders. These tions and operational changes to the diversions, and accom- physical changes and changes in the operation of Stanford’s panying maintenance to restore storage capacity at the Felt water diversions have significantly reduced the effects of the Reservoir, are known as the Steelhead Habitat Enhancement water diversions on the Covered Species. However, the opera- Project (SHEP). The design for the proposed modifications tion of the current diversions may still result in the incidental and operating protocols for the SHEP have been finalized by take of steelhead. Stanford, in consultation with the California Department of Fish and Game, and NOAA Fisheries. NOAA Fisheries is C urrent Los Trancos Diversion from Los Trancos Creek currently preparing a biological opinion for the project; a sum- The Los Trancos diversion, as constructed and currently oper- mary of the SHEP is attached as Appendix A. ated, could affect steelhead by impeding migration, manipulat- ing water levels, and impingement (having individuals getting Construction of the modified diversion facilities and activities stuck on the intake screen). The existing facility with its fish related to the accompanying maintenance to restore storage screen and ladder was designed by the California Department capacity at the Felt Reservoir are not Covered Activities under of Fish and Game. Stanford’s diversion operations were devel- this HCP, and will be permitted by NOAA Fisheries and vari- oped to diminish these potential effects and reduce