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1.0 INTRODUCTION

1.1 PURPOSE

This Final Initial Study (IS) and Mitigated Negative Declaration (MND; together, IS/MND) has been
prepared for the Phase 2A—Central Park Recycled Water Main Extension Project (“proposed Project”) in
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accordance with the requirements of the California Environmental Quality Act (CEQA) and the State
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CEQA Guidelines. Castaic Lake Water Agency (CLWA) is acting as the Lead Agency as defined by CEQA for
the environmental review of the proposed Project.

1.2 DESCRIPTION OF THE PROPOSED PROJECT

The Phase 2A—Central Park Recycled Water Main Extension was developed to offset nonpotable
irrigation and residential demands from domestic drinking water to recycled water. The proposed Project
will use recycled water from the Santa Clarita Valley Sanitation District’s Valencia Water Reclamation Plant
(WRP) to serve existing customers within CLWA’s service area.

The proposed Project is a part of the Phase 2 expansion of the recycled water system described in the
2016 Draft Recycled Water Master Plan (RWMP) Update and 2016 Draft EIR (DEIR). Phase 2 is planned to
expand recycled water use within Santa Clarita Valley and consists of four projects currently in various
stages of design. All of the available recycled water in the peak summer months is anticipated to be used
to meet demands that including existing Phase 1 projects, Phase 2 expansions currently in design, planned
developments (including Newhall Ranch and Vista Canyon), and future nearby customers served by
extending the Phase 2 system.

As proposed, the 24-inch transmission pipeline would originate at the Valencia WRP at The Old Road and
extend for approximately 5.25 miles, or up to 33,000 linear feet, along Rye Canyon Road and Newhall
Ranch Road. At the Newhall Ranch Road and Bouquet Canyon intersection, the proposed Project will
continue in one of two directions to Central Park. The pipeline would need to cross approximately 700

feet of the San Francisquito Creek. CLWA would either hang the transmission pipeline across bridge
crossings or install the transmission pipeline within an open cell of the bridge.

The first alternate alignment would be north along Bouquet Canyon Road, while the second alternate
direction would be east along Newhall Ranch Road to the River Village development and then north to

Central Park. Industrial and nonpotable irrigation demands adjacent to the alignment would be served by

1 California Code of Regulations, sec. 21000 et seq.
2 California Code of Regulations, sec. 15070–15075, State CEQA Guidelines.

Meridian Consultants 1.0-1 Phase 2A Recycled Water Project
131-001-16 November 2017

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