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Sewer Reliability: CRA
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Project Overview

The East Orange County Water District plans to upgrade and enhance the reliability of sewer systems serving Tustin and North Tustin residents and in other areas being served. The system dates back to 1962 and some aging sewer lines are in need of repairs/replacements to ensure toilets, shower and sink drains remain operational. Select sewer lines are also going to be upsized, allowing for continued reliability with future population growth. 


Following an extensive study, East Orange County Water District identified the following areas of the sewer system needing improvement: Browning Avenue, Fallen Leaf, 6th Street, Clarissa Lane and Crawford Canyon. 

At-a-Glance Info

AFFECTED CITIES:

Tustin, Unincorporated Orange County

PROJECT COST:

$16 million

ESTIMATED TIMELINE: 

Environmental Permitting/Design Phase:

Spring 2020 - Summer 2021

Construction Phase:

Summer 2021 - Summer 2022

View the Initial Study environmental report for the EOCWD Sewer Reliability: Capacity Rehabilitation & Augmentation Project by clicking on the PDF icon to the left or the link below. 

Thank you for your time and interest in this important public utilities improvement project!

Environmental Permitting Phase

  • Project impacts are identified, such as traffic and noise.

  • Project alternatives and options presented. Construction methods discussed.

  • Public input and comment are received.

  • Project goes before EOCWD Board of Directors for adoption, at a Public Hearing in which members of the public may comment.

Design Phase

  • Selected alternative receives final design. 

  • Construction schedule is developed. 

  • Construction contractor selected.

Construction Phase

  • Project undergoes construction. 

  • Project is commissioned for use.

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Bagger

There are 5 project segments:

Browning Avenue, Fallen Leaf, 6th Street, Clarissa Lane and Crawford Canyon
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Browning Avenue Segment

Project Benefits

  • Installs a redundant 300 foot sewer pipe crossing under the 5 fwy

  • Replaces more than 3,700 feet of aging sewer pipe constructed in 1962

  • Upsizes sewer pipe from 10- and 12-inch pipes to 15- and 18-inch pipes

  • Existing sewer lines remain in service during construction

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Fallen Leaf Segment

Project Benefits

  • Installs approximately 300 feet of new sewer pipe, replacing aging sewer pipe constructed in 1962

  • Installs 21-inch sewer pipes, allowing for continued reliability and expected capacity needs

  • Existing sewer lines remain in service during construction

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6th Street Segment

Project Benefits

  • Installs new 10-inch sewer pipe, allowing for continued reliability and expected capacity needs

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Clarissa Lane Segment

Project Benefits

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  • Replaces a 500 feet of aging sewer pipe constructed in 1962

  • Upsizes sewer pipe from 6-inch to 8-inch pipes, allowing for continued reliability and expected capacity needs

  • Existing sewer lines remain in service during construction

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Crawford Canyon Segment

Project Benefits

  • Replaces 600 feet of aging sewer pipe

  • Upsizes sewer pipe from 8-inch to 12-inch pipes, allowing for continued reliability and expected capacity needs

  • Existing sewer lines remain in service during construction

Road Constuction
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Construction Methods

Open Trench Excavation

Workers dig down to expose the existing pipe. Then the pipe is removed and replaced, and the trench is backfilled.

Jack and Bore

Crews dig pits at both ends of a pipeline to be replaced. A special machine creates a tunnel without disturbing the surface, allowing the old pipe to be removed and a new one pushed into place.

Pipe Example

  • Replacement sewer pipes will be upsized for continued reliability and future growth.

  • Sizes range from 8 inches to 21 inches in diameter.

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