PRSRT STD U.S. POSTAGE PAID Permanente Creek Flood Protection Project SAN JOSE, CA Permit No. 1231 Rancho San Antonio County 5750 Almaden Expressway San Jose, CA 95118-3614 Park detention basin www.valleywater.org

This project is funded by the voter-approved Safe, Clean Water and Natural Flood Protection Program.

San Francisco Bay Your neighborhood fl ood protection project

Palo N After years of planning and design, Alto Shoreline Park the Santa Clara Valley Water District is preparing to construct fl ood protection improvements along Permanente Creek. A Once completed, the Permanente Creek

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Flood Protection Project will provide natural e

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fl ood protection for at least 2,200 properties s

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in Mountain View and Los Altos, create e t recreational opportunities and enhance the S environment. Central Expy

Mountain The Permanente Creek Flood Protection Project El Camino RealCalifornia St View includes four elements:

Los Altos Permanente Creek Flood Protection Project A1. Floodwalls and levees north of City Hall Castro St U.S. Highway 101 Shoreline Blvd 237

Construction begins on Rancho San Antonio San Antonio Rd B Los Altos Calderon Ave 2. Flood detention area at City of Mountain View County Park detention basin B City Hall Mountain View’s McKelvey Park C

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C C3. Channel widening and deepening e You’re invited l a Cuesta Dr Join us at a public meeting to hear more about the Rancho of existing channels along H Permanente and Hale creeks San Antonio County Park fl ood detention basin project and El Camino Hospital what to expect during construction. D4. Flood detention areas at County of Levin Ave

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Permanente Sunnyvale k

e Diversion Thursday, November 10 from 7-9 p.m. e Channel

The Rancho San Antonio County Park detention r C

Quinlan Community Center, Social Room

Grant Rd e basin is the fi rst project element to begin t 10185 North Stelling Road n e construction. Construction is expected to begin n Cupertino, CA 95014 a 85 Los Altos m in December 2016 and last for approximately r Hills e Foothill Expy two years. P Monday, November 14 from 7-9 p.m. For more information: Hillview Community Center, Multi-Purpose Room valleywater.org/services/ See inside for construction information 97 Hillview Avenue PermanenteCreek.aspx » 280 Los Altos, CA 94022 (408) 755-0333 D Flood-prone area Cupertino Construction begins on What to expect during construction Features • Regular construction work hours are 8 a.m. to 5 • A large amount of dirt will be removed from Rancho San Antonio County • A 15-foot deep depression to collect peak storm fl ows from Permanente Creek p.m. Work is scheduled Monday through Friday, the site. The contractor will construct a 15-foot Park detention basin excluding legal holidays. wide road behind the Gate of Heaven Cemetery • Planting of native trees The Rancho San Antonio County Park detention for the haul trucks. The trucks will drive on • Removal of non-native trees that compete with • Safety of the community and our employees is basin is expected to begin construction in December the Hammond-Snyder trail to Stevens Creek native species our priority. Barricades, railings, lights, fences 2016 and last for approximately two years. Boulevard, to Foothill Boulevard, then onto • Replacement of existing maintenance bridge and other warning devices will be used for I-280 (to avoid Cristo Rey Drive). public safety and convenience. The Santa Clara Valley Water District, Santa Clara • New restroom facilities County Parks and MidPeninsula Regional Open • New, enlarged paved parking area with Space District are working together to minimize designated equestrian spaces construction impacts as much as practical and in New restrooms

S T O accordance with local ordinances. We appreciate P Cristo Rey Drive your understanding and cooperation as we embark Benefi ts on this important fl ood protection project. • Enhances many acres of wildlife habitat • Provides fl ood protection for thousands of homes and businesses in Mountain View and Los Altos, What is a fl ood detention area? saving residents thousands of dollars on fl ood Main flood detention basin Flood protection methods can include berms around insurance each year A 15-foot deep depression • Reduces construction impacts to downstream to collect peak storm flows buildings, widening channels, raising fl oodwalls, from Permanente Creek elevating structures and roadways, and/or constructing residential and businesses areas a bypass channel. In areas where development • Reduces fl ow rates, allowing for potential Construction fence limits widening the creek or raising fl oodwalls, fl ood riparian restoration downstream A visual screening fence storage basins are used to temporarily divert and store New parking area will be installed around the construction areas. fl oodwaters until a major storm passes. The South Meadow parking lot will be open throughout The Rancho San Antonio detention areas will be construction. The new, expanded parking lot and approximately 12 acres in size and 15 feet deep restroom will be built first, New native trees with mild side slopes, contoured to the surrounding slightly north of the existing Planting hundreds of native area and replaced with native trees and grass. parking lot. Upon completion trees and removal of of the new facilities, the non-native trees that Flood fl ows would inundate the site very rarely existing parking lot will be compete with native and quickly drain away. A 25-year fl ood, which closed. species along the creek. has a 4 percent chance of occurring in any given year, would result in about one foot of water in the Trail closures Permanente Creek detention area that would drain away in hours. Hammond-SnyderHam Loop Trail Various parts of the South A 100-year storm, which has a 1 percent chance Meadow and Hammond- of occurring in any given year, would fi ll the area Snyder Loop Trails will be closed during construction. and drain in one to four days. BEFORE PROJECT: Existing view of Rancho San Antonio basin Trail accessibility signage will be installed at least two weeks in advance of Get project updates any closures. New maintenance road 1. Visit www.valleywater.org/services/ Gate of PermanenteCreek intenance ro Flood detention basin Heaven Cemetery 2. Request project information using Access Valley Water http://www.valleywater.org/avwapp/ te 3. Sign up to receive project updates via email using the QR code Bridge replacement or the link on the project website. Replacement of existing maintenance bridge.

AFTER PROJECT: Visual rendering of San Antonio basin