Skip to content
Washington Sensible Shorelines Association

Links to Water Levels
Issaquah Creek
Lake Sammamish
Sammamish River
SeaTac Precipitation

  • Home
  • ShoreScore
  • Resources
    • Regulation & Codes
      • Army Corp of Engineers
      • City of Bellevue
        • City SMP Ordinances
        • Shoreline Master Plan Revised Policies Draft
      • City of Bellevue Link to Website Archives
      • Department of Ecology
        • DOE White Paper, Protecting Puget Sound SMP 3_4_2010
        • Non Conforming Uses
          • Common Sense Alliance Response
      • King County
        • 2024 King County Flood Planning – Draft
        • Public comment period for the draft Flood Plan closes March 15 2024
        • Willowmoor Project & Weir
        • Willowmoor Floodplain Restoration Project
        • Sammamish River Capital Investment Strategy – CIS
        • Sammamish River History
        • Sammamish Transition Zone Sediment Removal Feasibility Study 2012
        • King County Critical Area Ordinance
        • King County Flood Control Budget 2022-2027
          • Capital Improvement Program Project Allocations
        • King County Comp Plan/Shoreline Master Program
      • State Law, WAC & RCW
        • SHORELINE MANAGEMENT ACT OF 1971 Chapter 90.58 RCW
        • MASTER PROGRAM APPROVAL/AMENDMENT PROCEDURES AND GUIDELINES Chapter 173-26 WAC
        • SHORELINE MANAGEMENT PERMIT AND ENFORCEMENT PROCEDURES Chapter 173-27 WAC
    • WSSA Reports
      • Lake Sammamish
        • Lake Sammamish Flooding
          • Understanding Lake Level Heights – Mean Sea Level (MSL), NGVD, NAVD
          • Lake Sammamish Data
          • High-Water-Events-Causes
          • Lake Sammamish Facts – Flooding 2023
        • Concept of a dynamic weir
        • WEIRGATE
        • Previous Years of Lake Sammamish Flooding
        • Sammamish Residents Comment June 2012
      • SMP Process 11/23/2014
      • Phantom Lake
    • Legislative Action
      • Bellevue Planning Commission Approves SMP 7-0
      • HB-1653 CAO ruling
    • Other Organizations Working on SMPs
      • Bainbridge Shoreline Homeowners
    • FEMA
    • Homeowners Guide to Landslides
    • Letters, Statements and Petitions
  • Videos
    • Video Library
    • History Timelines
    • Parts 1-6
    • Parts 7-11
    • Lake Sammamish Timeline June 2021
    • Sammamish Slough Restriction Impacts
    • Downspout Versus Townspout
  • Speak Up
  • About Us
  • Support WSSA
  • Latest News
  • Community Meetings

Understanding Lake Level Heights – Mean Sea Level (MSL), NGVD, NAVD

Understanding Lake Level Measurement (PDF)
Rain Fall Vs Sammamish Lake Levels

Coming Events

Issaquah Hyla Crossing Project

October 18, 2021

Community Planning and Development Department is hosting a meeting to allow the community an opportunity to understand the proposal with…

Read More

Lake Sammamish Timeline June 2021

June 15, 2021

   

Read More

Lake Sammamish Flooding

April 19, 2021
Read More

Support WSSA

© Sensible Shorelines Association. All rights reserved | Envision Web Design