Preconstruction public meetingTuesday, April 10 from 7-9:00 p.m.7th Day Adventist Church

Permanente Creek Flood Protection Project: Channel Improvements

Your Safe, Clean Water vote at work

• Introductions

• Project Overview

• Channel Improvement Features

• Construction Overview

• Comments & Questions

Agenda

The purpose of this presentation is to provide an update on the Channel Improvements Project as we enter the second and final year of construction.

Purpose

Historical flooding

• 12 major floods in the past century

• Most recent major floods in 1995 and 1998

• Potential flood damages in this area are estimated in excess of $48 million (1999 value)

Project objectives

• Provide one-percent flood protection to the citizens of Mountain View and Los Altos using a natural flood protection approach

• Protect Central Expressway and Middlefield Road

• Address deteriorating concrete channels

• Provide opportunities for environmental enhancements and trail extensions

• Minimize long-term maintenance costs

Major project elements

A Levees and floodwalls

C Channel reconstruction

B

D

McKelvey Park

Rancho San Antonio Park

Flood detention areas:

The project will protect 2,200 parcels in Mountain View and Los Altos from a one-percent flood.

Light blue area shows the historical flood area

Project schedule

Channel improvements

Channel improvements - Permanente

Channel improvements – Hale

Box Culvert Replacement

Construction schedule

Construction Activity Estimated Dates in 2018

Channel widening site preparation Mid-April to May

Permanente special u-frameconstruction

May to Mid-October

Hale u-frame construction May to Mid-October

Box culvert replacement May to September

Separation wall at Arroyo Road September

Site restoration October – December

What to expect during construction• Estimated 8 months of construction

• Work hours are 7:30 a.m. to 4 p.m., Monday through Friday

• Work between Mountain View Ave. and Valencia Ave. will mainly take place within the creek

• Mountain View Ave. between Raymundo Ave. and Arroyo Rd. will be closed to traffic for approx. 5 months while the culvert is replaced

• Temporary fencing and signs will be installed

Channel Improvements: Construction Impacts

• Vibration

• Noise

• Dust

• Traffic

Channel Improvements: Box Culvert Detours

Channel Improvements: Construction Haul Route

Haul Route Map For Work Area #2&#3

Outreach

• Public meetings

• Mailed notice

• Signage and flyers

• Website

• Email updates

• Fact sheets

• Media relations

• NextDoor

• Conference Calls

For more information

http://www.valleywater.org/permanente-creek

•Sign up to receive project updates via email.

•View project reports, maps, history and other information.

Lotina NishijimaProject Manager

lnishijima@valleywater.org(408) 630-2795

Jose VillarrealPublic Information Rep.jvillarreal@valleywater.org

(408) 630-2879

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Questions?