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Summary
of changes
Water System Design Manual
Scroll down to select the
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Manual in other formats please contact
Amy Swecker.
The complete Manual can be
downloaded in Word with this self-extracting file (design_manual.exe).
Manual cover
and table of contents (downloadable)
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TABLE OF
CONTENTS
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CHAPTER
&
SECTION
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CHAPTER
& SECTION TITLE
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PAGE
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PREFACE |
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GLOSSARY |
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1
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INTRODUCTION
.......................................................................
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1-1
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1.0
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Purpose
and Scope ...................................................................
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1-1
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1.1
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Applicability
................................................................................
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1-1
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1.2
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“Must”
versus “Should” etc. ........................................................
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1-2
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1.3
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Relationship
with Planning Requirements .................................
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1-2
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1.4
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Engineering
Requirements ........................................................
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1-3
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1.5
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General
Engineering Project Submittal Requirements ...............
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1-4
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1.6
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Minimum
System Design Requirements ....................................
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1-4
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1.7
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Sizing
Criteria and Water Rights ...............................................
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1-4
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1.8
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DOH
Policies, Procedures and
Guidelines…...............................
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1-4
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1.9
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Ten
States Standards ................................................................
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1-5
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1.10
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State
Environmental Policy Act (SEPA) Considerations ..……..
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1-5
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1.11
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Other
Referenced Documents and Standards
..........................
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1-5
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2
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PROJECT
REPORTS
...............................................................
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2-1
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2.0
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Relationship
to Water System Plan (WSP) ...............................
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2-1
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2.1
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Submittal
to DOH for Review and Approval
..............................
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2-1
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2.2
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Project
Report Contents ............................................................
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2-1
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3
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CONSTRUCTION
DOCUMENTS
..............................................
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3-1
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3.0
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Relationship
to Water System Plan (WSP) ...............................
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3-1
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3.1
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Submittal
to DOH for Review and Approval
...............................
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3-1
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3.2
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Design
Drawings ........................................................................
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3-2
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3.3
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Project
Specifications ................................................................
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3-3
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3.4
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Change
Orders ..........................................................................
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3-4
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3.5
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Contracted
Components for a Project …………………..
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3-4
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4
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PROCESS
FOR REVIEW AND APPROVAL OF PROJECT REPORTS AND CONSTRUCTION
DOCUMENTS
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4-1
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4.0
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When
Documents Required .......................................................
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4-1
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4.1
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Coordination
with Local Approving Authorities
..........................
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4-1
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4.2
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Project
Report Requirements ....................................................
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4-1
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4.3
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Project
Report and Construction Document Screening and Review Process
.........................................................................
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4-2
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4.4
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Submittal
Exceptions - Miscellaneous Components and Distribution Mains
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4-3
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4.5
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Submittal
Exceptions for Distribution-Related Projects
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4-4
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4.6
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Source
Approval and Water Rights ...........................................
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4-7
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4.7
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Resolution
of Disputed DOH Review Decisions
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4-8
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4.8
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Review
Fees and Invoice ..........................................................
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4-8
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4.9
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Project
Approval Letter & Construction Completion ..................
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4-9
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4.10
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Construction
Completion Report (CCR) Forms .........................
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4-9
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5
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WATER
DEMAND REQUIREMENTS
.......................................
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5-1
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5.0
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Applicability
...............................................................................
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5-1
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5.1
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Estimating
Demands vs. Actual Use Data .................................
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5-1
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5.2
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Residential
Water Demand Design Criteria ...............................
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5-2
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5.3
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Documentation
of Water Demand .............................................
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5-9
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5.4
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Estimating
Nonresidential Water System Demand
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5-11
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5.5
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Water
Demand Forecasting .......................................................
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5-16
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5.6
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Other
Regulatory Considerations ..............................................
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5-17
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5.7
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General
System Reliability ………………………………………….
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5-17
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6
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WATER
SYSTEM PHYSICAL CAPACITY ANALYSIS (ERUs)
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6-1
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6.0
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Applicability
................................................................................
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6-1
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6.1
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Background
................................................................................
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6-2
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6.2
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Relationship
Between System Capacity and Physical Capacity
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6-2
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6.3
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Fundamental
Design Principle for Physical Capacity Analysis ..
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6-2
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6.4
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The
Concept of Equivalent Residential Units (ERUs) ................
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6-2
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6.5
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Design
Factors ...........................................................................
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6-5
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6.6
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The
Relationship Between Physical Capacity and Drinking Water Operating
Permits (Chapter 246-294 WAC) ...................
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6-6
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6.7
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Methodology
to Determine System Physical Capacity
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6-6
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7
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SOURCE
OF SUPPLY
..............................................................
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7-1
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7.0
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Water
Resource Analysis and Water Rights
…………………….
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7-1
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7.1
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Source
Water Quantity ……………………………………………..
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7-2
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7.2
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Source
Water Quality and Protection …………………………….
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7-3
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7.3
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Ground
Water Sources (Wells) ……………................................
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7-6
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7.4
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Spring
Sources ……………………………………………………...
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7-9
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7.5
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New
Surface Water Supplies ……………………………………...
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7-11
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7.6
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Interties
......................................................................................
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7-11
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7.7
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General
Reliability Considerations ………………………………..
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7-12
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7.8
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General
Source Considerations …………………………………..
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7-12
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8
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TRANSMISSION
AND DISTRIBUTION MAIN DESIGN
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8-1
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8.0
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Transmission
and Distribution Main Definitions
.........................
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8-1
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8.1
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System
Distribution Facility Sizing .......……………....................
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8-1
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8.2
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Hydraulic
Analysis .....................................................................
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8-4
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8.3
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Materials
....................................................................................
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8-12
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8.4
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General
Design Consideration for Mains
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8-13
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8.5
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Appurtenant
Design Considerations ..........................................
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8-14
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8.6
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Layout
of Mains .........................................................................
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8-16
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8.7
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Detail
Drawings ..........................................................................
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8-17
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8.8
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Standard
Construction Specifications ........................................
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8-17
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8.9
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Cross-Connection
Protection .....................................................
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8-19
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8.10
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Chapter
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