HomeMy WebLinkAboutReg 2016-12-05 Item 5E - Ordinance - Exhibit A - Surface Water Design ManualKING COUNTY, WASHINGTON
SURFACE WATER
DESIGN MANUAL
King County
Department of Natural Resources and Parks
April 24, 2016
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
King County Executive'
Dow Constantine
Metropolitan King County Council'
Rod Dembowski, District 1
Larry Gossett, District 2
Kathy Lambert, District 3
Jeanne Kohl - Welles, District 4
Dave Upthegrove, District 5
Claudia Balducci, District 6
Pete von Reichbauer, District 7
Joe McDermott, District 8
Reagan Dunn, District 9
Department of Permitting and Environmental Review
(DPER)
John Starbard, Director
Jim Chan, Assistant Director
Lisa Verner, Legislative Coordinator
Department of Natural Resources and Parks (DNRP)
Christie True, Director
Bob Burns, Deputy Director
Water and Land Resources Division (WLRD)
Mark Isaacson, Division Director
John Taylor, Assistant Division Director
Primary Contributing Staff (WLRD)
Curt Crawford, P.E, Stormwater Services Sec. Manager
Mark Wilgus, P.E., Engineer IV
Ken Krank, P.E., Former Supervising Engineer
David Batts, Senior WQ Engineer
Jeff Pray, P.E., Engineer
Dale Nelson, Engineer
Primary Contributing Staff (DPER)
Molly Johnson, P.E., Former Development Engineer
Primary Supporting Staff (WLRD)
Bob Gilland, Administrative Specialist
Other Contributing Staff (WLRD)
Jeff Burkey, Hydrologist
Lucy Traxinger, Engineer II
Lica Dulan, Engineer 1
http://www.kingcounty.gov/elected/executive/constantine.aspx
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Other Contributing Staff (Previous Editions)
Steve Foley, PE, Former Senior Engineer
Kate Rhoads, Former Senior WQ Engineer
Mary Lear, P.E., Former Engineer
Sue Clarke, Former Senior WQ Engineer
Kelly Whiting, P.E., Former Senior Engineer
Louise Kulzer, Former Senior Water Quality Specialist
Jeff Stern, Senior Water Quality Planner
Thor Tyson, Former Geologist
Bruce Johnson, P.E., Former Senior Engineer
Linda Holden, P.E., Former Senior Engineer
Rhett Jackson, P.E., Former Senior Hydrologist
David Hartley, P.E., Former Senior Hydrologist
Randall Parsons, P.E., Former Senior Engineer
Dave Hancock, Senior Engineer
John Koon, Engineer
Jeff Jacobson, P.E., Former Engineer
Amy Carlson, Former Engineer
Don Althauser, P.E., Managing Engineer
Jennifer Gaus, Former Engineer
Randy Brake, Former Engineer
Zahid Khan, P.E., Supervising Engineer
Jeff O'Neill, P.E., Former Supervising Engineer
Ann Bethel, Former Engineer
Richard Lowe, P.E., Senior Engineer
Rebecca Marcy, Project Program Manager
Consultants (Previous Editions)
Rick Schaefer, P.E., formerly RW Beck & Associates
Malcom Leytham, PhD, P.E., Northwest Hydraulic
Consultants
Gary Minton, PhD, P.E.
Carlos Herrera, P.E., Herrera Environmental Consultants
Beth Schmoyer, P.E., formerly Herrera Environmental
Mark Ewbank, P.E., Herrera Environmental Consultants
Mike Giseburt, P.E., R.W. Beck & Associates
Sarah Spear Cooke, Ph.D., Cooke Scientific Services
SvR Design Company
4/24/2016 2016 Surface Water Design Manual
INTRODUCTION
TABLE OF CONTENTS
AND OVERVIEW
KING COUNTY, WASHINGTON
SURFACE WATER
DESIGN MANUAL
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
4/24/2016 2016 Surface Water Design Manual
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
TABLE OF CONTENTS
CHAPTER 1
DRAINAGE REVIEW AND
REQUIREMENTS
Section 1.1
Section
Section
Section
Section
Drainage Review
1.1.1 Projects Requiring Drainage
Review
1.1.2 Drainage Review Types and
Requirements
1.1.3 Drainage Review Required By
Other Agencies
1.1.4 Drainage Design Beyond
Minimum Compliance
Section 1.2 Core Requirements
Section 1.2.1 Core Reqmt #1: Discharge at the
Natural Location
Section 1.2.2 Core Reqmt #2: Offsite Analysis
Section 1.2.3 Core Regent #3: Flow Control
Section 1.2.4 Core Reqmt #4: Conveyance
System
Section 1.2.5 Core Reqmt #5: Erosion and
Sediment Control
Section 1.2.6 Core Reqmt #6: Maintenance and
Operations
Section 1.2.7 Core Reqmt #7: Financial
Guarantees and Liability
Section 1.2.8 Core Reqmt #8: Water Quality
Section 1.2.9 Core Reqmt #9: Flow Control
BMPs
Section 1.3 Special Requirements
Section 1.3.1 Special Reqmt #1: Other Adopted
Area - Specific Requirements
Section 1.3.2 Special Reqmt #2: Flood Hazard
Area Delineation
Section 1.3.3 Special Reqmt #3: Flood
Protection Facilities
Section 1.3.4 Special Reqmt #4: Source Control
Section 1.3.5 Special Reqmt #5: Oil Control
Section 1.4 Adjustment Process
Section 1.4.1 Adjustment Authority
Section 1.4.2 Criteria for Granting Adjustments
Section 1.4.3 Adjustment Application Process
Section 1.4.4 Adjustment Review Process
Section 1.4.5 Request for Reconsideration
Procedure
1 -24
1 -24
1 -25
1 -25
1 -27
1 -38
1 -55
1 -60
1 -65
CHAPTER 2
DRAINAGE PLAN
SUBMITTAL
Section 2.1
Section 2.1.1
Section 2.1.2
Section 2.2
Section 2.2.1
Section 2.2.2
Section 2.2.3
Section 2.2.4
Section 2.2.5
Section 2.3
Section 2.3.1
Section 2.3.2
1 -66 Section 2.4
1 -68
1 -82
1 -99
1 -99
1 -101
1 -102
1 -103
1 -105
1 -107
1 -108
1 -108
1 -110
1 -110
1 -112
Section 2.4.1
Section 2.4.2
Section 2.4.3
Plans for Permits and
Drainage Review
Plans Required for Permit
Submittal
Plans Required for Drainage
Review
Plans Required with Initial
Permit Application
Subdivision, UPD, and Binding 2 -5
Site Plans
Short Subdivisions 2 -6
Commercial Site Development 2 -6
Single family Residential 2 -6
Other Permits 2 -6
Drainage Review Plan 2 -7
Specifications
Engineering Plan Specifications 2 -8
Projects in Targeted Drainage 2 -37
Review
Plans Required After Drainage 2 -39
Review
Plan Changes After Permit 2 -39
Issuance
Final Corrected Plan Submittal 2 -39
Final Plat, Short Plat, and 2 -40
Binding Site Plan Submittals
2 -3
2 -3
2 -3
2 -5
2016 Surface Water Design Manual 4/24/2016
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
TABLE OF CONTENTS
CHAPTER 3
HYDROLOGIC
ANALYSIS & DESIGN
Section 3.1
Section 3.1.1
Section 3.1.2
Section 3.1.3
Section 3.2
Section 3.2.1
Section 3.2.2
Section 3.2.3
Section 3.2.4
Section 3.3
Section 3.3.1
Section 3.3.2
Section 3.3.3
Section 3.3.4
Section 3.3.5
Section 3.3.6
Section 3.3.7
Hydrologic Design Standards
and Principles
Hydrologic Impacts and
Mitigation
Flow Control Standards
Hydrologic Analysis Using
Continuous Models
Runoff Computation and
Analysis Methods
Rational Method
Continuous Models and the
Runoff Files Method
The Approved Model
The HSPF Model
Hydrologic Design
Procedures and
Considerations
CHAPTER 4
CONVEYANCE SYSTEM
ANALYSIS & DESIGN
3 -3 Section 4.1 Route Design and Easement 4 -3
Requirements
3 -3 Section 4.1.1 Route Design 4 -3
Section 4.1.2 Easement and Setback 4 -3
3 -5 Requirements
3 -7
3 -11
3 -13
Section 4.2
Section 4.2.1
Section 4.2.2
Section 4.2.3
Pipes, Outfalls, and Pumps
Pipe Systems
Outfall Systems
Pump Systems
3 -21 Section 4.3 Culverts and Bridges
Section 4.3.1 Culverts
3 -34
3 -34
3 -37
General Hydrologic Design 3 -37
Process
Flow Control Design Using the 3 -39
Runoff Files Method
Conveyance System Design 3 -41
with the Runoff Files Method
Safety Factors in Hydrologic 3 -41
Design
Design Options for Addressing 3 -43
Downstream Drainage Problems
Point of Compliance Analysis 3 -46
Onsite Closed Depressions and 3 -47
Ponding Areas
4 -7
4 -7
4 -29
4 -36
4 -37
4 -37
Section 4.3.2 Culverts Providing for Fish 4 -51
Passage /Migration
Section 4.3.3 Bridges 4 -53
Section 4.4 Open Channels, Floodplains, 4 -55
and Floodways
Section 4.4.1 Open Channels 4 -55
Section 4.4.2 Floodplain /Floodway Analysis 4 -71
4/24/2016 2016 Surface Water Design Manual