Advice from Department of Ecology

Advice from Department of Ecology The simplest way to reduce landslide risk is to avoid slideprone areas in the first place. Simple practices such as building a house farther from the edge of a steep slope, maintaining native vegetation above the slope, or inspecting drains annually are important.

City of Langley Bluff Seminar May 29, 2013

Issues

Issues Natural Process; Bluff erosion is an important ecological process

Issues Natural Process; Bluff erosion is an important ecological process Risk to people and property from development on the bluff;

Issues Natural Process; Bluff erosion is an important ecological process Risk to people and property from development on the bluff; Legal: Property Rights

Issues Natural Process; Bluff erosion is an important ecological process Risk to people and property from development on the bluff; Legal: Property Rights Environment + Habitat Conservation

Issues Natural Process; Bluff erosion is an important ecological process Risk to people and property from development on the bluff; Legal: Property Rights Environment + Habitat Conservation Economic Issues

Floodplain Management

Floodplain Management Flooding is a fundamental and beneficial natural process

Floodplain Management Flooding is a fundamental and beneficial natural process Risk to people and property from development in floodplains

Floodplain Management Flooding is a fundamental and beneficial natural process Risk to people and property from development in floodplains Regulations on new development only part of the answer; Mitigation of existing development may be more important Property Rights; Habitat Conservation

Shoreline Management Act

Shoreline Management Act Passed by Legislature in 1971 and Voters in 1972

Shoreline Management Act Passed by Legislature in 1971 and Voters in 1972 Regulates Development from 200 Upland to Middle of Water Body

Shoreline Management Act Passed by Legislature in 1971 and Voters in 1972 Regulates Development from 200 Upland to Middle of Water Body Single Family Residential a Preferred Use

Shoreline Management Act Passed by Legislature in 1971 and Voters in 1972 Regulates Development from 200 Upland to Middle of Water Body Single Family Residential a Preferred Use Bulkheads to Protect Single Family Homes an Exempt Activity

Langley s

Langley s Last Updated 2001

Langley s Last Updated 2001 2013 Updated Locally Adopted on May 6, 2013

Langley s Last Updated 2001 2013 Updated Locally Adopted on May 6, 2013 Development Standards Adjacent to Bluffs Buffers and Setbacks Vegetation Preservation and Restoration Stormwater Management

Coastal Zone Atlas

Legend Update - 2012 Shoreline Environment Designations Shoreline Properties Reaches Langley Central Aquatic Conservancy Langley East Shoreline Residential Langley West Aquatic Urban Urban Aquatic Boat Harbor Aquatic Conservancy Shoreline Residential Shoreline Residential - UGA I Aquatic Conservancy - UGA

Buffers + Setbacks 50 Buffer from Top and Toe of Slope 15 Building Setback from Top or Toe of Slope

Langley West Saratoga Passage Langley Central Sara t oga C r eek Dock (Industrial Use) Dock (Derelict - To be removed with marina expansion) Marina Wood Bulkhead Rotting (30 ft Offset) Broo k h av Noble Cr eek City of Langley: Update Figure 5 Vegetation Coverage and Distance from Bluff Legend This map is intended for planning purposes only. Inaccuracies may exis t. This map depicts the approximate location and extent of areas subjec t to the City of Langley SMP. The actual extent of the s horeline planning area requires a site-specific evaluation to identify the location of the ordinary high water mark and any ass oc iated wetlands. SO URCE: City of Langley, 2011; Island County, 2010; PSNERP, 2010; WDNR, 2006. Department of Ecology Grant G1100124/Task 2.3 15ft setback Eastimated Buffer Vegetation Coverage ( Distance from Top of Bluff 50ft Buffer 0-5% 10-50 Top of Slope 6-25% 51-75 Reaches 26-75% 76-100 76-100% 101 + Feet 0 425 850 S:\GIS\Projects\211xxx\211142 Langley SMP\mxd\working\Shoreline Analysis AC.mxd (AWC; 10/5/2012) en C r eek Langley East

Landscaping

Landscaping All lots shall be generously landscaped, and consistent with the natural environment of Langley and appropriate to the planned use. Retention of natural landscaping is encouraged. (Ord. 527, 1989)

Native Vegetation

Native Vegetation Removal of native vegetation shall be avoided, where feasible. Where removal of native vegetation cannot be avoided, it shall be minimized to protect ecological functions. If non-native vegetation is to be removed, then it shall be replaced with native vegetation within the shoreline jurisdiction. Bulkheads: Nonstructural measures, such as placing the development further from the shoreline, planting vegetation, or installing on-site drainage improvements, are not feasible or not sufficient;

Detailed Drainage Plans Detailed drainage plans are not required for single-family or duplex development or redevelopment that includes the creation of less than 5,000 square feet of impervious surface area.

SMP Drainage Plan Requirement New residential construction and additions to residential structures that increase net impervious surface by 200 feet or more shall be required to provide a detailed drainage plan as part of any permit application.

Recap Don t build too close to the bluff Retain and Restore Native Vegetation Stormwater Management

Edgecliff 1992

Edgecliff 2001

Edgecliff 2006

1992 2001

Bluff Information Greenbelt Consulting: www.greenbeltconsulting.com designlangley: www.designlangley.org Department of Ecology Website: ww.ecy.wa.gov http://www.ecy.wa.gov/programs/sea/landslides/ index.html