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King County REGIONAL HAZARD MITIGATION PLAN UPDATE VOLUME 2: PLANNING PARTNER ANNEXES JULY 2015 Prepared for: King County Office of Emergency Management 3511 NE 2nd Street Renton, WA 98056 Prepared by: Project #103S2548 Chapter 20: City of Redmond ---PAGE BREAK--- 20-1 CHAPTER 20. CITY OF REDMOND UPDATE ANNEX 20.1 HAZARD MITIGATION PLAN POINT OF CONTACT Primary Point of Contact Alternate Point of Contact Debbie Newman, Program Coordinator 8701 160th Avenue NE Redmond, WA 98052 Telephone: (425) 556-2259 e-mail Address: [EMAIL REDACTED] Mark Hagreen, Commander 8701 160th Avenue NE Redmond, WA 98052 Telephone: (425) 556-2509 e-mail Address: [EMAIL REDACTED] 20.2 JURISDICTION PROFILE The following is a summary of key information about the jurisdiction and its history; additional information about the City of Redmond is attached in profile data sheets at the end of this annex: • Date of Incorporation—1912 • Current Population—55,840 as of 2013; population doubles to 110,000 during the workday. • Population Growth—Redmond population exploded from 1,426 in 1960 to 55,840 in 2013. According to information tracked by the Washington State Office of Financial Management, Redmond’s population more than doubled in a 232 percent increase between 1980 and 2010. Population rose steadily from 23,318 in 1980; 35,800 in 1990; 45,256 in 2000; and 54,144 in 2010. Details are provided in the profile data sheets attached at the end of this annex. • Location and Description—The City of Redmond is located in western Washington State, approximately 17 miles east of Seattle and 281 miles west of Spokane. The city is a center of technology and home to some of the major high-tech firms in the country, including Microsoft, Nintendo of America, AT&T, and Physio-Control. Redmond also has a significant concentration in avionics/aerospace, homeland defense, and equipment manufacturers. The nearest seaport is the Port of Seattle on Puget Sound. Lake Sammamish lies to the south of downtown Redmond. The Sammamish River and Bear Creek pass through the City. The Cascade Range, a 1,000-mile long chain of volcanic mountains, which extends from Northern California to southern British Columbia, Canada is about 40 miles east of Redmond. WA State Highway 520 runs through the City. Cities bordering Redmond include Bellevue on the southwest, Kirkland on the west and Sammamish with a small border to the southeast. The City topography includes hills and valleys. The soil in the valley is classified as alluvial soil, which may liquefy during an earthquake. Some of the hills surrounding the valley have steep slopes. Two large park facilities are adjacent to Redmond: Willows Run Golf Course to the north and Marymoor Park to the south, adjacent to Lake Sammamish. • Neighborhoods-Map NP-1 Redmond Neighborhoods in the profile data sheets attached at the end of this annex shows the location of the neighborhoods. – North Redmond borders the Sammamish Valley and is north of the Education Hill neighborhood. Located on Education Hill (one of the City’s three hills), the area is residential and primarily single family housing. There are a few parcels in the ---PAGE BREAK--- King County Regional Hazard Mitigation Plan Update; Volume 2: Planning Partner Annexes 20-2 neighborhood that are zoned commercial. This area could be isolated from services if transportation routes are limited due to a hazard event. Fire Station 17 was built in this neighborhood beginning in 2010 and went into service in March 2012. – Education Hill is located in northeast Redmond. It consists of primarily low- to moderate- density residential and includes the Emerald Heights retirement community. There are very few services that are currently available in the neighborhood and they are likely to become isolated in the event of a hazard. There are numerous schools and open space that could be utilized for emergency response and recovery. – Sammamish Valley is located in the valley floodplain. The area is characterized by large amounts of open space, parks and low-density residential housing. A variety of business and manufacturing parks are present as well. This neighborhood is located both in the floodplain and the liquefaction zone. – Willows/Rose Hill is located in northwest Redmond. This is a hill neighborhood that is primarily residential. The Olympic Pipeline runs through this neighborhood. A variety of business and manufacturing parks are present as well. – Overlake is located on a hill in the southwest region of Redmond. This area has residential, commercial and business parks. Microsoft is located in Overlake. This location may provide opportunities for emergency operations, but (as is the case with much of Redmond) it is located very close to the Seattle Fault and could experience extreme ground shaking in the case of an earthquake along the Seattle Fault. – Grass Lawn is located north of Overlake on the western side of Redmond. This hill neighborhood is mostly low- to moderate-density residential. The Olympic Pipeline runs through this neighborhood. – Idylwood is Redmond’s lakefront neighborhood. It is located along Lake Sammamish, east of Overlake. The neighborhood is primarily low- to moderate- density residential. Along the lake there are some multi-family buildings. Home values are especially high in Idylwood. There are several schools, churches and open space. – Bear Creek is located in the central eastern river valley in Redmond. This is the least populated neighborhood and has diverse zoning. There are residential areas to the north and west sides of the neighborhood. The residential area includes a mobile home park. There is some community retail in the north. The central area has resource lands. Land south of Bear Creek and Evans Creek provides commercial and industrial activities. – Downtown is located in central Redmond on the valley floor, which is subject to both floods and liquefaction. City services are located in downtown, including City Hall, Fire Station Headquarters, Police Station and most of the commercial retail. Dense transit- oriented development, including residential housing, has been encouraged in this area. – Southeast Redmond is split between the hill and the valley. Lowlands are subject to liquefaction. This neighborhood has residential, commercial and manufacturing parks. • Brief History—Pioneers arrived in the Sammamish Valley in 1871 and began a logging industry that continued into the 1920s. Logging gave way to agriculture, with dairy, chicken, and truck farms the norm. The Evergreen Point floating bridge was completed in 1963, providing an easy link between Seattle and Redmond. Better roads heralded strong residential development, followed by commercial growth that began slowly in the 1970s and accelerated significantly in the 1990s and 2000s with high-tech companies like Microsoft growing enormously. In 100 years, Redmond grew from an incorporated area of three square blocks to over 17 square miles. ---PAGE BREAK--- CITY OF REDMOND UPDATE ANNEX 20-3 • Climate—Redmond’s weather is typical of the Seattle area, with mild summers and cool, wet winters. Temperatures rarely dip far below freezing in the winter and rarely reach above 80 degrees Fahrenheit in the summer. Annual average rainfall is 35.5 inches, with rain year-round, but most falling in the 7-month period of October through May. The annual mean temperature is 52.8 degrees Fahrenheit. • Governing Body Format—The City of Redmond is governed by a Mayor and seven-member City Council. The City consists of eight departments: Mayor/Executive, Police, Fire, Public Works, Parks, Finance, Planning, and Human Resources. The City has five committees which report to the council. Redmond’s Mayor and City Councilmembers serve on twenty-three regional committees. City Council assumes responsibility for the adoption of this plan; the Mayor will oversee its implementation. • Development Trends—City of Redmond adopted its 2030 Comprehensive Plan in 2011. It maintains the vision of Redmond’s future with vibrant regional growth centers in the Downtown and Overlake neighborhoods and improved connections among all of Redmond’s 10 neighborhoods. The urban centers will provide for concentrated residential, employment, and transportation and will support sustainable growth for the next 20 years; approximately two-thirds of the City’s new housing and 60 percent of new commercial floor area are planned to occur in Downtown and Overlake. Those areas have already experienced appreciable residential and commercial growth for a number of years. Outside of the urban center neighborhoods, Southeast Redmond is the primary location for additional employment growth and most remaining capacity for additional single-family development is in the Willows-Rose Hill neighborhood. Details are provided in the profile data sheets attached at the end of this annex. 20.3 CAPABILITY ASSESSMENT The following tables assess Redmond’s capabilities in various areas: • Table 20-1: Legal and Regulatory • Table 20-2: Fiscal • Table 20-3: Administrative and Technical • Table 20-4: National Flood Insurance Program (NFIP) Compliance • Table 20-5: Classifications under various community mitigation programs ---PAGE BREAK--- King County Regional Hazard Mitigation Plan Update; Volume 2: Planning Partner Annexes 20-4 TABLE 20-1. LEGAL AND REGULATORY CAPABILITY Local Authority State or Federal Prohibitions Other Jurisdictional Authority State Mandated Comments Codes, Ordinances & Requirements Building Code Yes No No Yes Current 2012 International Codes, 2012 Uniform Plumbing Code, 2009 ICC/ANSI A117.1 and Redmond Municipal Code (RMC) Title 15 Zoning Yes No No Yes Redmond Zoning Code (RZC) – RMC Title 21; 4/16/2011 Subdivisions Yes No No Yes RZC 21.74; 4/16/2011 Stormwater Management Yes No Yes Yes RMC 15.24 implemented in Stormwater Technical Notebook Post Disaster Recovery Yes No No No Redmond Municipal Code, Ch. 2.20 Emergency Preparedness; Hazard Mitigation Plan Annex Real Estate Disclosure No No No Yes WA State mandates certain disclosures by Real Estate agents under RCW 64.06 Growth Management Yes No Yes Yes City of Redmond Comprehensive Plan; 12/17/2011 Site Plan Review Yes No Yes Yes RZC 21.76; 4/16/2011 Public Health and Safety No No Yes No Seattle/King County Public Health Environmental Protection Yes No Yes Yes RZC 21.64; 4/16/2011 Planning Documents General or Comprehensive Plan Yes No Yes Yes Redmond 2030 Comprehensive Plan adopted 12/06/2011, Ordinance 2638 Is the plan equipped to provide linkage to this mitigation plan? Yes Floodplain or Basin Plan Yes No No Yes Floodplain regulations in RZC 21.64.040 (Frequently Flooded Areas, Ordinance 2663 effective 09/29/2012) and RMC 15.04 (Flood Control, Ordinance 2645 passed 02/07/2012) Comprehensive Flood Hazard Management Plan was adopted by Council Resolution 1315 on 12/15/2009. Citywide Watershed Management Plan was adopted by City Council - Number 13-212 (C14) on 12/03/2013. ---PAGE BREAK--- CITY OF REDMOND UPDATE ANNEX 20-5 TABLE 20-1. LEGAL AND REGULATORY CAPABILITY Local Authority State or Federal Prohibitions Other Jurisdictional Authority State Mandated Comments Stormwater Plan Yes No Yes Yes Watershed Plan approved 12/2013 (no ordinance); Water Resources Strategic Plan (draft) in progress; RMC 13.06 Stormwater Management Code, 13.18 Stormwater Management Utility Capital Improvement Plan Yes No Yes Yes Capital Investment Program (CIP) 2013-2018 adopted as part of the 2013- 2014 budget, Ordinance 2676 on 12/04/2012. What types of capital facilities does the plan address? Water, Wastewater, Stormwater, Transportation, Construction, Parks, Fire, Police How often is the plan revised/updated? Every 2 years Habitat Conservation Plan Yes No Yes No Tri-County Chinook Recovery Plan City of Redmond Critical Areas Code, stream regulations, buffer setbacks RZC 21.64; 4/16/11 Economic Development Plan Yes No Yes No Draft Strategic Plan, no date of adoption; WA State Growth Management Act Shoreline Management Plan Yes No Yes Yes RZC 21.68; 9/16/11 Community Wildfire Protection Plan No No No No No plan Response/Recovery Planning Comprehensive Emergency Management Plan Yes No Yes Yes City of Redmond Municipal Code, Ch. 2.20 Emergency Preparedness Threat and Hazard Identification and Risk Assessment Yes No Yes No City of Redmond Municipal Code, Ch. 2.20 Emergency Preparedness; in Hazard Mitigation Plan Terrorism Plan No No Yes No Post-Disaster Recovery Plan Yes No Yes City of Redmond Municipal Code, Ch. 2.20 Emergency Preparedness; Hazard Mitigation Plan Annex Continuity of Operations Plan Yes No Yes No City of Redmond Municipal Code, Ch. 2.20 Emergency Preparedness; Comprehensive Emergency Management Plan (CEMP) Public Health Plans No No Yes No Seattle-King County Public Health ---PAGE BREAK--- King County Regional Hazard Mitigation Plan Update; Volume 2: Planning Partner Annexes 20-6 TABLE 20-2. FISCAL CAPABILITY Financial Resources Accessible or Eligible to Use? Community Development Block Grants Yes Capital Improvements Project Funding Yes Authority to Levy Taxes for Specific Purposes No User Fees for Water, Sewer, Gas or Electric Service No Incur Debt through General Obligation Bonds No* Incur Debt through Special Tax Bonds No* Incur Debt through Private Activity Bonds No* Withhold Public Expenditures in Hazard-Prone Areas No State Sponsored Grant Programs Yes Development Impact Fees for Homebuyers or Developers No Other Real Estate Excise Tax; King County Flood Control District-Basin Opportunity Fund *Jurisdiction has access to the resource indicated; however, local policies may prevent or prohibit use of these resources for mitigation projects or programs. TABLE 20-3. ADMINISTRATIVE AND TECHNICAL CAPABILITY Staff/Personnel Resources Available? Department/Agency/Position Planners or engineers with knowledge of land development and land management practices Yes Planning, Public Works, Parks Engineers or professionals trained in building or infrastructure construction practices Yes Planning, Public Works Planners or engineers with an understanding of natural hazards Yes Planning, Public Works Staff with training in benefit/cost analysis Yes Planning, Finance Surveyors No Personnel skilled or trained in GIS applications Yes Planning, Public Works, Finance, Parks Scientist familiar with natural hazards in local area Yes Planning, Public Works Emergency manager Yes Police Grant writers Yes Police, Fire, Planning, Public Works, Parks ---PAGE BREAK--- CITY OF REDMOND UPDATE ANNEX 20-7 TABLE 20-4. NATIONAL FLOOD INSURANCE PROGRAM COMPLIANCE What department is responsible for floodplain management in your community? Planning Who is your community’s floodplain administrator? (department/position) Jeff Dendy, Senior Engineer, Planning Do you have any certified floodplain managers on staff in your community? No What is the date of adoption of your flood damage prevention ordinance? 4/16/2011 When was the most recent Community Assistance Visit or Community Assistance Contact? 01/09/2012 To the best of your knowledge, does your community have any outstanding NFIP compliance violations that need to be addressed? If so, please state what they are. No Do your flood hazard maps adequately address the flood risk within your community? (If no, please state why) Yes, however the preliminary updated maps are even better. Does your floodplain management staff need any assistance or training to support its floodplain management program? If so, what type of assistance/training is needed? Help in identifying work that requires a permit from work that does not. Does your community participate in the Community Rating System (CRS)? If so, is your community seeking to improve its CRS Classification? If not, is your community interested in joining the CRS program? Not yet. We are in the process of joining. TABLE 20-5. COMMUNITY CLASSIFICATIONS Participating? Classification Date Classified Community Rating System In progress In progress In progress Building Code Effectiveness Grading Schedule Yes 2 7/23/2007 Public Protection Yes 3 Not available StormReady In progress In progress In progress Firewise No N/A N/A Tsunami Ready (if applicable) N/A No No 20.4 JURISDICTION-SPECIFIC NATURAL HAZARD EVENT HISTORY Table 20-6 lists past occurrences of natural hazards within the jurisdiction, going back to 1990. Repetitive flood loss records are as follows: • Number of FEMA-Identified Repetitive Loss Properties: None • Number of FEMA-Identified Severe Repetitive Loss Properties: none • Number of Repetitive Flood Loss/Severe Repetitive Loss Properties Known to Have Been Mitigated: N/A ---PAGE BREAK--- King County Regional Hazard Mitigation Plan Update; Volume 2: Planning Partner Annexes 20-8 TABLE 20-6. NATURAL HAZARD EVENTS Type of Event FEMA Disaster # (if applicable) Date Preliminary Damage Assessment Snow and ice storm 4056 2012 January 12 $122,984 in road materials (anti-icer) and overtime (final cost submitted to FEMA) Flood 1817 2009 January 6 Snowstorm 1825 2008 Dec. 18-28 9-18 inches of snow accumulation in Redmond due to a series of five significant storms. $225,487 in debris removal, snow & ice removal, materials, repairs and overtime for emergency response (final cost submitted to FEMA) Windstorm 1682 2006 December 14 $197,598 in debris removal, equipment usage, labor, contracted work, repairs (final cost submitted to FEMA) Nisqually Earthquake 1361 2001 February 28 Minor cosmetic damage to city buildings and infrastructure did not exceed $7,000. Flood, Landslide 1159 1997 January 17 Unknown Columbus Day Wind Storm 1993 October 11 Unknown Windstorm 1993 March Unknown Inaugural Day Windstorm 981 1993 January 20 Unknown Severe Storm 1991 March Unknown Severe Storm 883 1990 November 9 Unknown Severe Storm 852 1990 January 6 Unknown 20.5 HAZARD RISK RANKING Table 20-7 presents the ranking of the hazards of concern. Hazard area extent and location maps are included at the end of this chapter. These maps are based on the best available data at the time of the preparation of this plan, and are considered to be adequate for planning purposes. 20.6 STATUS OF PREVIOUS PLAN INITIATIVES Table 20-8 summarizes the initiatives that were recommended in the previous version of the hazard mitigation plan and their implementation status at the time this update was prepared. ---PAGE BREAK--- CITY OF REDMOND UPDATE ANNEX 20-9 TABLE 20-7. HAZARD RISK RANKING Rank Hazard Type Risk Rating Score (Probability x Impact) 1 Severe Winter Weather 48 2 Severe Weather 48 3 Earthquake 32 4 Flood 12 5 Wildfire 6 6 Landslide 6 7 Dam Failure 6 8 Volcano 0 9 Tsunami 0 10 Avalanche 0 TABLE 20-8. PREVIOUS ACTION PLAN IMPLEMENTATION STATUS Action Status Action # Completed Carry Over to Plan Update Removed; No Longer Feasible Comments RD-1 X RD-1 Outreach activities are ongoing, completed every year. Participated in a wide variety of preparedness fairs and gave dozens of preparedness talks to the public, businesses and visitors throughout the whole community. Developed the Redmond Ready basic preparedness education class for City of Redmond employees and Redmond residents. Began delivering Redmond Ready classes in July 2012. Trained approximately 200 City of Redmond employees to make them Redmond Ready. Conducted several Redmond Ready Days to train the public in basic preparedness, First Aid, and CPR. Worked with Microsoft to develop the www.redmondready.org web portal, which promotes the program and which lives in the cloud and can be updated quickly by OEM staff during a disaster. Promoted the regional Make it Through preparedness campaign. Conducted Map Your Neighborhood classes. Conducted an average of three CERT classes every year. Partnered with the Redmond Citizens Corps Council and Amateur Radio Emergency Services regarding community outreach. Worked with many partner agencies to develop a high-quality, low-cost emergency preparedness calendar for 2013 and 2014 that is a great year-round resource. ---PAGE BREAK--- King County Regional Hazard Mitigation Plan Update; Volume 2: Planning Partner Annexes 20-10 TABLE 20-8. PREVIOUS ACTION PLAN IMPLEMENTATION STATUS Action Status Action # Completed Carry Over to Plan Update Removed; No Longer Feasible Comments RD-2 X RD-2 Alternative service centers Fire Station 17 was built and went into service in March 2012. The station is located on Education Hill, away from the liquefaction zone in downtown Redmond. Future development will concentrate in both the Downtown and Overlake Urban centers. Overlake is away from the liquefaction zone. RD-3 X RD-3 Safe-to-fail mechanisms Emergency power generation was substantially upgraded at the Public Works Maintenance and Operations Center and at the Redmond Municipal Campus. Redundant network infrastructure has been added. Water tanks on Education Hill were seismically retrofitted. Public Works is in the process of their Buildings Facilities Condition Assessment, the outcome of which will give the city a better handle on the condition of our assets and what may need to be implemented. The Public Works construction group is looking at bridge seismic retrofits (such as 148th). Our bridges are rated for safety based on King County’s bridge inventory system. ---PAGE BREAK--- CITY OF REDMOND UPDATE ANNEX 20-11 TABLE 20-8. PREVIOUS ACTION PLAN IMPLEMENTATION STATUS Action Status Action # Completed Carry Over to Plan Update Removed; No Longer Feasible Comments RD-4 X RD-4 Resilient transportation networks 1. Redmond is completing a grid network in both the Downtown and Overlake Urban Centers where most of the growth will be occurring in the future. 2. All of our bridges are inspected regularly and the existing bridges meet reasonable earthquake standards with the exception of the 148th Bridge north of Redmond Way which has funding for a seismic retrofit. All the new bridges and bridge replacements are designed to current earthquake standards. 3. City is developing a complete multi-modal transportation system to provide travel choices including bringing light rail to Overlake in 2023 and eventually to downtown. 4. Redmond has a state of the art Traffic Operations Center that has cameras at key intersections to monitor and change parking signals remotely to respond to changing traffic conditions. 5. Redmond’s R-TRIP program offers infrastructure for ride matching, transit route information, and periodic communication and incentives to encourage individuals to explore ways of getting between home and work that don’t rely on driving alone and support finding a potential carpool partner or bus route that could be used in the event of an emergency. This program has nearly 29,000 registered users among employees and residents in Redmond. Further, by contract with King County Metro, we provide these services in our community. 6. Bridge at 95th and Bear Creek needs to be rebuilt by 2016 to address flooding and seismic issues. ---PAGE BREAK--- King County Regional Hazard Mitigation Plan Update; Volume 2: Planning Partner Annexes 20-12 TABLE 20-8. PREVIOUS ACTION PLAN IMPLEMENTATION STATUS Action Status Action # Completed Carry Over to Plan Update Removed; No Longer Feasible Comments RD-5 X RD-5 Business outreach programs are ongoing, completed every year. Police Department conducted Critical Incident Protocol (CIP) outreach regarding crime prevention and man-made hazards. Emergency Management conducted many preparedness sessions at businesses, helping businesses prepare their employees. As part of the City’s Economic Development initiatives, the City has developed close communications and relationships with businesses through its One Redmond partnership (which took the place of the former Greater Redmond Chamber of Commerce) and neighborhood level business outreach which could be deployed to assist outreach and communication about emergency planning and operations. Past outreach has included: winter time promotions via www.GOrtrip.com to encourage winter emergency planning; and partnering with the Greater Redmond Transportation Management Association in 2012 to bring in Ed Gabriel, Principal Deputy Assistant Secretary for Preparedness and Response, US Health and Services to raise awareness by businesses of all sizes about the need for emergency preparedness. RD-6 X RD-6 Flood tolerant community Redmond does not allow development in the floodway and has adopted regulations for developments outside of the floodway but within the floodplain. One of those regulations requires compensating floodplain storage for these developments so we don’t reduce our floodplain capacity. Redmond completed a large trunk line (storm drainage line) in the BNSF railroad right of way that will carry the 50 year storm for much of downtown. Additionally, Redmond is constructing an enormous stormwater vault in Overlake behind Sears. The vault will reduce flow rates from about 345 ac. The vault is about 1.5 ac in area and 20 feet deep. Two additional vaults are proposed in Overlake in the future including one to be constructed with the light rail station. Both the trunk line in downtown and the Overlake vaults should greatly reduce the risk of flooding in Redmond’s urban centers. Evans Creek will be moved to the north out of the industrial area. Regional stormwater facilities will go into SE Redmond to mitigate localized flooding. Sewer pump stations are being updated. ---PAGE BREAK--- CITY OF REDMOND UPDATE ANNEX 20-13 20.7 HAZARD MITIGATION ACTION PLAN AND EVALUATION OF RECOMMENDED INITIATIVES Table 20-9 lists the initiatives that make up the jurisdiction’s hazard mitigation plan. Table 20-10 identifies the priority for each initiative. Table 20-11 summarizes the mitigation initiatives by hazard of concern and the six mitigation types. TABLE 20-9. HAZARD MITIGATION ACTION PLAN MATRIX Applies to new or existing assets Hazards Mitigated Objectives Met Lead Agency Estimated Cost Sources of Funding Timeline Included in Previous Plan? #RD-1—To mitigate impacts involved with isolation following a severe hazard event, Redmond will develop outreach activities to enable Redmond residents, businesses and visitors to survive in-place for more than three days. New and Existing Severe Weather, Earthquake, Flood, Wildfire, Landslide, Dam Failure 4, 6, 7, 8, 11, 13, 14, 15 OEM Low General Fund Ongoing Yes #RD-2—To ensure provision of vital services following a hazard event, Redmond will develop alternative service centers in less hazardous areas. New Severe Weather, Earthquake, Flood, Wildfire, Landslide, Dam Failure 1, 5, 8 Planning Medium Grants, Bonds Long Term Yes #RD-3—To mitigate damage to vulnerable structures and infrastructure, Redmond will promote retrofitting with safe-to-fail mechanisms. Existing Severe Weather, Earthquake, Flood, Landslide 1, 5, 8 Planning Low General Fund Long Term Yes #RD-4—To mitigate against the loss of major transportation facilities in and around the City, Redmond will invest resources in building more resilient transportation networks. New and Existing Severe Weather, Earthquake, Flood, Landslide, Dam Failure 1, 5, 8, 12 Public Works Low General Fund, Grant Long Term Yes ---PAGE BREAK--- King County Regional Hazard Mitigation Plan Update; Volume 2: Planning Partner Annexes 20-14 TABLE 20-9. HAZARD MITIGATION ACTION PLAN MATRIX Applies to new or existing assets Hazards Mitigated Objectives Met Lead Agency Estimated Cost Sources of Funding Timeline Included in Previous Plan? #RD-5—To mitigate against the functional loss of business communities, Redmond will develop and deliver business outreach programs. New and Existing Severe Weather, Earthquake, Flood, Wildfire, Landslide, Dam Failure 4, 6, 7, 8, 11, 13, 14, 15 OEM Low General Fund Ongoing Yes #RD-6—To mitigate impacts from expected increases in incidents of shallow flooding, Redmond will build a flood tolerant community able to accommodate increases in low impact flooding. New and Existing Severe Weather, Flood, Landslide 1, 5, 7, 8, 12 Public Works Low General Fund Long Term Yes #RD-7—Continue to maintain compliance and good standing under the National Flood Insurance Program. This will be accomplished through the implementation of floodplain management programs that, at a minimum, will meet the minimum requirements of the NFIP, which include the following: • Enforcement of the adopted flood damage prevention ordinance, • Participating in floodplain identification and mapping updates, and • Providing public assistance/information on floodplain requirements and impacts New and existing Flood 2, 4, 10, 12 King Co. Low General Fund Ongoing No #RD-8—Integrate the hazard mitigation plain into other plans, ordinances or programs to dictate land uses within the jurisdiction. New All Hazards 2, 4, 8, 10 Planning Low General Fund Short-term No #RD-9—Continue to support the county-wide initiatives identified in this plan. New and Existing All Hazards 4,6,11,12, 13, 14, 15 City of Redmond Low General Fund Short term No #RD-10—Actively participate in the plan maintenance strategy identified in this plan. New and Existing All Hazards 4, 6, 11, 12, 13, 14, 15 King County OEM City of Redmond Low General fund Short term No ---PAGE BREAK--- CITY OF REDMOND UPDATE ANNEX 20-15 TABLE 20-10. MITIGATION STRATEGY PRIORITY SCHEDULE Initiative # # of Objectives Met Benefits Costs Do Benefits Equal or Exceed Costs? Is Project Grant- Eligible? Can Project Be Funded Under Existing Programs/ Budgets? Prioritya RD-1 8 High Low Yes No Yes High RD-2 3 Medium Medium Yes Yes Yes Low RD-3 3 Medium Low Yes Yes Yes Low RD-4 4 Medium Low Yes Yes Yes Low RD-5 8 High Low Yes No Yes High RD-6 5 Medium Low Yes Yes Yes Low RD-7 4 Medium Low Yes No Yes High RD-8 4 Medium Low Yes No Yes High RD-9 7 Medium Low Yes No Yes High RD-10 7 Low Low Yes Yes Yes High a. See Introduction for explanation of priorities. TABLE 20-11. ANALYSIS OF MITIGATION INITIATIVES Initiative Addressing Hazard, by Mitigation Typea Hazard Type 1. Prevention 2. Property Protection 3. Public Education and Awareness 4. Natural Resource Protection 5. Emergency Services 6. Structural Projects Avalanche Dam Failure 2, 3, 4, 6, 8, 10 3, 4 1, 5, 9 2, 4, 9 Earthquake 2, 3, 4, 8, 10 3, 4 1, 5, 9 2, 3, 4, 9 4 Flood 2, 3, 4, 6, 7, 8, 10 3, 4, 7 1, 5, 7, 9 6, 7 2, 3, 4, 7, 9 4, 6 Landslide 2, 3, 4, 6, 8, 10 3, 4 1, 5, 9 6 2, 4, 9 Severe Weather 2, 3, 4, 6, 8, 10 3, 4 1, 5, 9 6 2, 3, 4, 9 4, 6 Severe Winter Weather 2, 3, 4, 6, 8, 10 3, 4 1, 5, 9 6 2, 3, 4, 9 4, 6 Tsunami Volcano Wildfire 2, 3, 4, 8, 10 1, 5, 9 2, 9 a. See Introduction for explanation of mitigation types. ---PAGE BREAK--- King County Regional Hazard Mitigation Plan Update; Volume 2: Planning Partner Annexes 20-16 20.8 FUTURE NEEDS TO BETTER UNDERSTAND RISK/ VULNERABILITY Public Works recently completed a Facilities Condition Assessment for City of Redmond-owned buildings. Results of the assessment will help determine which buildings require further evaluation. Hazard scenarios should continue to be examined to determine cost effective ways to address the hazard if possible and make the community and its infrastructure more resilient. 20.9 ADDITIONAL COMMENTS This 2014 City of Redmond Hazard Mitigation Plan updates the 2009 “City of Redmond Hazards Mitigation Plan Update,” which updated and superseded the 2004 plan. The 2009 Hazard Mitigation Plan is robust at over 235 pages. The 2014 and 2009 plans were developed through similar yet sufficiently divergent processes and formats that the 2009 Hazard Mitigation Plan will still prove a useful Redmond- specific reference, addressing some items and hazards not covered in the 2014 regional effort. Dam failure is the only hazard added to this 2014 Redmond plan that was not addressed in the 2009 Redmond Hazard Mitigation Plan. The addition is due to the existence of a private dam in King County that could affect Bear Creek from the north. No deficiencies in the dam are currently known; its existence is merely noted for completeness. The following profile data sheets provide additional information that is relevant for the current City of Redmond annex. ---PAGE BREAK--- CITY OF REDMOND PROFILE DATA SHEETS ---PAGE BREAK--- ---PAGE BREAK--- 405 405 S T 202 202 S T 908 908 S T 520 520 S T 520 520 Sammamish River Lake Sammamish Marymoor Park (to King County) Farrel- McWhirter Park (to Redmond) Redmond Watershed Preserve Overlake Education Hill SE Redmond Idylwood Grass Lawn North Redmond Willows/ Rose Hill Downtown Sammamish Valley Bear Creek English Hill 148th AVE NE BEL-RED RD NE 116th ST NE 124th ST 166th AVE NE R E D -W O OD RD NE 104th ST REDMOND W Y NE 90th ST 160th AVE NE 171st AVE NE NE 128th ST W L K S A MMA MISH P K W Y 172nd AVE NE WOOD- R E D RD NE 80th ST NE 124th WY NE 36th ST NE 111th ST NE 20th ST RED M OND W Y 124th Ave NE Avondale Rd NE Sahale e Wa y N E N E 1 2 4t h St NE 85th St N E N ovelt y Hill Rd N E Redmon d F a ll Ci t y R d NE 132nd St 228th Ave NE NE Novelty Hill Rd NE 132nd St Neighborhood Redmond City Limits 0 0.5 1 1.5 Miles Effective: December 17, 2011 MAP NP-1 Redmond Neighborhoods Legend G:\Planning\COMPLAN & DEV GUIDE GRAPHICS\ArcGISMaps\CompPlanUpdate_Periodic_2010_11\FinalFormat\PrintReady\Map_NP_1.mxd ---PAGE BREAK--- City Under 18 65 and over Redmond 23% 10% Bellevue 21% 14% Kirkland 19% 11% Seattle 15% 11% Demographic Profile PEOPLE Children and Seniors Redmond’s youth population (under 18 years of age) accounts for nearly one-quarter of the population. Seniors (ages 65 and over) account for almost 10% of the population. The under-18 population outnumbers the senior population more than 2-to-1. Redmond has a larger percentage of youth than Seattle, Kirkland, and Bellevue. The portion of seniors is similar to Seattle‘s and Kirkland’s. PEOPLE page 1 ---PAGE BREAK--- Demographic Profile PEOPLE Age Distribution There is a significantly higher concentration of people 20-34 years old, at nearly 28% of the total population, compared to the total 65 and over population, at about 10%. Adults ages 18- 64 account for two- thirds of Redmond’s population. Age Percentage of population < 5 years 8% 5-19 years 16% 20-34 years 28% 35-44 years 17% 45-54 years 12% 55-64 years 9% 65-74 years 5% 75+ years 5% PEOPLE page 2 ---PAGE BREAK--- Demographic Profile PEOPLE Age Structure The majority of the population is between the ages of 18-64 years old, and less than 10% is 65 years and over. The children (17 and under) represent just under one-quarter of Redmond’s population. Age Number of People Percent of Population 17 and under 12,317 23% 18-64 36,706 68% 65 and over 5,121 9% Total 54,144 100% PEOPLE page 3 ---PAGE BREAK--- Demographic Profile PEOPLE Racial Distribution Redmond’s single-race population is composed of almost two-thirds white, one-quarter Asian, 8% Hispanic or Latino, 2% Black or African American, less than 1% Indian American and Alaska Native, and less than 1% Native Hawaiian and other Pacific Islander. Three percent consider themselves 2 or more races, and 1% consider themselves some other race. White 65% Black or African American 2% American Indian and Alaska Native Asian 25% Native Hawaiian and Other Pacific Islander Some Other Race 3% Two or More Races 4% Race Source: 2010 Demographic Profile Race Number of People White alone 35,296 Black or African American alone 924 American Indian and Alaska Native alone 200 Asian alone 13,733 Native Hawaiian and Other Pacific Islander alone 82 Some Other Race alone 1,744 Two or More Races 2,165 PEOPLE page 4 ---PAGE BREAK--- Demographic Profile PEOPLE Hispanic or Latino Population About 4,214 individuals in Redmond, or 8% of the total population, are Hispanic/Latino. Race Count Hispanic/ Latino 4,214 Race other than Hispanic/ Latino 49,930 PEOPLE page 5 ---PAGE BREAK--- Year Youth Adult Senior 2010-Redmond 23% 68% 9% 2010-Washington 18% 69% 13% 2020-Washington 18% 65% 18% 2030-Washington 19% 60% 21% Demographic Profile PEOPLE Population Redmond’s population grew from 35,800 people in 1990 to 54,144 in 2010, a 51% increase. Although the population saw a net increase in both decades, the rate of growth decreased between 2000 and 2010, compared to the period between 1990-2000. PEOPLE page 6 ---PAGE BREAK--- Demographic Profile PEOPLE Age Distribution The age distribution in 2010 is comprised of nearly one-quarter youth. Nearly two- thirds of the population, and the largest portion of the Redmond’s population are adults, and seniors account for one- tenth of the population. The Washington State Office of Financial Management predicts that, in the next two decades, the youth population will remain fairly consistent. The highly concentrated adult age group will move into the senior age group. This trend will result in a steady decrease in adult population and a steady increase in the senior population. Youth: 17 and under Adult: 18 to 64 Senior: 65 and over PEOPLE page 7 ---PAGE BREAK--- Demographic Profile PEOPLE Geographic Mobility Three-quarters of Redmond residents lived in the same house one year ago. Fifteen percent moved from another home King County, 2% from another county in Washington, and 4% each from another state or another country. PEOPLE page 8 ---PAGE BREAK--- Demographic Profile PEOPLE Place of Birth About 15,000 of Redmond’s residents, or 29% of the total population, are foreign born. Of the foreign-bon population, 55% immigrated to the US in or after the year 2000, 27% from 1990-1999, and the remaining 18% prior to 1990. PEOPLE page 9 ---PAGE BREAK--- Demographic Profile PEOPLE Foreign-Born Population Nearly 9,000 residents—almost 60% of all foreign- born residents— immigrated from Asia. South Americans and Europeans comprise 2,651 and 2,514 residents, respectively. Under 1,000 other North Americans, primarily Canadians, have come to Redmond. Finally, 280 people immigrated to Redmond from Africa. Thirty-nine percent of Redmond residents were born in another state in the US. Foreign-born individuals and native Washingtonians each account for just under one-third of the population, and the remaining 1% consists of US natives born abroad. Country Origin Population Percentage Europe 16.3% Asia 58.3% Africa 1.8% North America 6.4% South America 17.2% PEOPLE page 10 ---PAGE BREAK--- Demographic Profile PEOPLE Foreign Born Population: Age Distribution The most frequently- occurring age group among the foreign born population is 25 to 34 years (young adults), followed by ages 35 to 44. Foreign born: Number of people Percentage of population Under 5 years 393 2.6% 5 to 17 years 1,108 7.4% 18 to 24 years 856 5.7% 25 to 34 years 6,165 41.0% 35 to 44 years 3,592 23.9% 45 to 54 years 1,316 8.8% 55 to 59 years 430 2.9% 60 and 61 years 206 1.4% 62 to 64 years 153 1.0% 65 to 74 years 521 3.5% 75 years and over 294 2.0% PEOPLE page 11 ---PAGE BREAK--- Demographic Profile PEOPLE Transitional Bilingual Program Participation There are 7,851 students enrolled in the 12 schools in Redmond (Lake Washington School District), of whom 581 participate in the Transitional Bilingual Program. PEOPLE page 12 ---PAGE BREAK--- Demographic Profile PEOPLE Language Spoken at Home Sixty-seven percent of residents in Redmond speak English at home, while the remaining 33% speak other languages. These numbers are very similar to the proportions of foreign born and native born residents. PEOPLE page 13 ---PAGE BREAK--- Demographic Profile PEOPLE Language Spoken at Home (continued) After English, Asian and Pacific Islander languages form the second-largest linguistic group, accounting for at 45% of foreign-language speakers, followed by Indo-European languages (besides Spanish) with 32%, Spanish with 18%, and all other languages with 3.5%. PEOPLE page 14 ---PAGE BREAK--- Demographic Profile PEOPLE Non-English Speakers Fourteen percent of all foreign born Redmond residents speak only English. Fifty-nine percent speak primarily another language but also speak English “very well,” and the remainder speak primarily another language but do not speak English “very well.” PEOPLE page 15 ---PAGE BREAK--- Demographic Profile PEOPLE Ethnic Distribution in Schools The ethnic distribution of students in Redmond schools is very similar to the ethnic distribution for the entire city of Redmond, generally differing by no more than one to two percentage points. Sixty-three percent of students are white, followed by Asian at 21%, Hispanic at 10%, Black with American Indian/ Alaskan Native at less than and two or more races at 4% of the student population. American Indian/ Alaskan Native Asian Black Hispanic White Two or more races 19 1648 [PHONE REDACTED] 353 PEOPLE page 16 ---PAGE BREAK--- Demographic Profile PEOPLE Working Age Of the working-age Redmond residents (those ages 16 and over), a majority of are in the 25-44 category, which includes 17,246 workers. The 45-54 age group is the second-largest, with 4,605 workers, followed by third is 55-64, with 3,601 workers. Age Employed 16 to 19 years 602 20 to 24 years 2,158 25 to 44 years 17,246 45 to 54 years 4,605 55 to 64 years 3,601 65 to 74 years 735 75 years and over 81 PEOPLE page 17 ---PAGE BREAK--- Demographic Profile PEOPLE Disabilities Approximately 2% of children under 5 years of age have a disability. The rates are similar between children 5-17 years old and adults 18-64 years old, at 5% and respectively. However, disabilities are reported by 41% of adults 65 and over. Women are half again as likely as men to be disabled, with rates at 9% and respectively. Sex Percent with Disability Male 6% Female 9% Age Percent with Disability Under 5 years 2% 5 and 17 years 5% 18 and 64 years 4% 65 years and over 41% PEOPLE page 18 ---PAGE BREAK--- Demographic Profile ECONOMIC Occupation Distribution The occupation distribution in Redmond is dominated by management, business, science, and arts fields, with nearly two-thirds of the civilian employed population. The remaining 35% are distributed across service occupations; sales and office occupations; natural resources, construction, and maintenance occupations; and production, transportation, and material moving occupations. Occupation People (employed population over 16) Percentage of Population Management, business, science, and arts occupations 19,000 65% Service occupations 2,820 10% Sales and office occupations 5,090 18% Natural resources, construction, and maintenance occupations 930 3% Production, transportation, and material moving occupations 1,170 4% Total 29,020 100% ECONOMIC page 1 ---PAGE BREAK--- Demographic Profile ECONOMIC Industry Of the 29,020 employed people ages 16 and over in Redmond, 9,490 workers, who account for nearly one-third of the workforce, have occupations within the professional, scientific, management, administrative and waste management services. The next largest industry is educational services, health care, and social assistance, with over 4,000 workers. ECONOMIC page 2 ---PAGE BREAK--- Demographic Profile ECONOMIC Annual Household Income The median annual household income in Redmond is $92,164, while the mean is $104,610. Household Income Percent Less than $10,000 3% $10,000 to $14,999 2% $15,000 to $24,999 5% $25,000 to $34,999 6% $35,000 to $49,999 8% $50,000 to $74,999 16% $75,000 to $99,999 15% $100,000 to $149,999 24% $150,000 to $199,999 11% $200,000 or more 10% Median income $92,160 Mean income $104,610 ECONOMIC page 3 ---PAGE BREAK--- Demographic Profile ECONOMIC Poverty Level Five percent of Redmond’s population are living below the poverty level. The poverty threshold for a four- person household with two related children under 18 is approximately $22,000/year, whereas the city’s median annual household income is $92,160. About 13% of the total population is low-income, i.e. lives in a household that earns under 200% of the poverty level. 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 50% 100% 125% 150% 185% 200% Number of Individuals Household Income as Percentage of Poverty Level Low-Income Individuals Household Income as Percentage of Poverty Level Number of Individuals Percentage of Total Population Under 50% 1,230 2% Under 100% 2,800 5% Under 125% 4,200 8% Under 150% 5,260 10% Under 185% 6,360 12% Under 200% 6,790 13% Total Population 54,144 100% ECONOMIC page 4 ---PAGE BREAK--- Demographic Profile HOUSING Housing Occupancy In Redmond, about 93% of the housing units are occupied. The mean number of bedrooms in a housing unit is 2.32. On average, owner- occupied units tend to have more bedrooms than renter-occupied ones. Tenure Average Number of Bedrooms Owned- occupied 2.49 Renter- occupied 2.13 Total 2.32 HOUSING page 1 ---PAGE BREAK--- Demographic Profile HOUSING Housing Tenure Of the 22,550 occupied homes, around 46% are rented, about 43% are owned with a mortgage or loan, and 11% are owned free and clear. Housing tenure Percent Owner with a mortgage/ loan 43% Owned free and clear 11% Renter occupied 46% Occupied housing units 100% HOUSING page 2 ---PAGE BREAK--- Demographic Profile HOUSING Housing Type Redmond’s housing units are mostly 1- unit detached homes, and higher density housing. Although 1- unit detached structures are the single most common type of residential structure, at nearly 40%, nearly one-half of all structures contain at least two units. Finally, two percent of all housing units are mobile homes, boats, RVs, vans, etc. Housing type Percent 1-unit, detached 41% 1-unit, attached 8% 2 units 1% 3 or 4 units 8% 5 to 9 units 12% 10 to 19 units 13% 20 or more units 16% Mobile home 2% Boat, RV, van, etc. Total 100% HOUSING page 3 ---PAGE BREAK--- Demographic Profile HOUSING Housing Values The median value of a home in Redmond is $469,500, but 44% of all homes are worth $500,000 or more. Value Estimate Less than $50,000 2% $50,000 to $99,999 2% $100,000 to $149,999 1% $150,000 to $199,999 3% $200,000 to $299,999 11% $300,000 to $499,999 38% $500,000 to $999,999 42% $1,000,000 or more 2% Median $469,500 HOUSING page 4 ---PAGE BREAK--- City of Redmond Population and Employment Dwellings Population Employment 1980 8,721 23,318 12,035 1990 14,972 35,800 35,708 1993 17,392 38,987 39,026 1995 18,287 40,030 47,657 1998 18,509 43,310 59,631 2000 20,248 45,256 72,219 2001 20,368 45,490 78,853 2002 20,660 46,040 77,365 2003 21,274 46,480 78,286 2004 21,810 46,900 79,459 2005 22,204 47,600 82,073 2006 22,616 49,890 81,814 2007 22,869 50,680 85,775 2008 23,144 51,320 89,599 2009 23,323 51,890 90,704 2010 24,227 54 144 76,876 2011 24,602 55,150 78,893 2022 33,500 72,000 118,000 2012 24,770 55,360 77,615 2013 24,872 55,840 2030 36,500 78,000 119,000 Notes: Population from US Census for each decade Population from WA State Office of Financial Management for intervening years, except 1993 from City of Redmond Employment from WA State Employment Security Department, allocated by PSRC to jurisdicational boundaries, except 1980 and 1993 from City of Redmond Employment estimates for 1995, 2000, 2001, and 2002 reflect most recent PSRC revisions POPULATION & EMPLOYMENT page 1 ---PAGE BREAK--- CITY OF REDMOND HAZARD MAPPING ---PAGE BREAK--- ---PAGE BREAK--- ^ kj kj kj kj kj kj kj kj kj kj kj kj kj kj kj kj kj kj kj kj kj kj kj kj kjkj kj kj d d nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm nm !F !F !F !F !F !F !F!F !F !F!F !F !F!F!F !F !F !F !F !F !F !F !O XW XW XW XWXW XW Lake Sammamish Sammamish River 520 REDMOND WEST LAKE SAMMAMISH CLEVELAND AVONDALE BELLEVUE-REDMOND WOODINVILLE-REDMOND 228TH 124TH 85TH 90TH 128TH REDMOND-FALL CITY 133RD 154TH SAHALEE 164TH 148TH 160TH CITY OF REDMOND . 0 0.5 1 Miles Base Map Data Sources: King County, U.S. Geological Survey Locations are approximate. Critical Facilities and Infrastructure Critical Facilities Critical Infrastructure Bridges kj Communications Dams !F Medical Care Other Facility d Power Protective Function nm Schools XW Transportation Water Supply Wastewater HazMat kj !O Government Function ---PAGE BREAK--- ^ Liquefaction Susceptibility Lake Sammamish Sammamish River 520 REDMOND WEST LAKE SAMMAMISH CLEVELAND AVONDALE BELLEVUE-REDMOND WOODINVILLE-REDMOND 228TH 124TH 85TH 90TH 128TH REDMOND-FALL CITY 133RD 154TH SAHALEE 164TH 148TH 160TH CITY OF REDMOND . Liquefaction data provided by the Washington State Department of Natural Resources, Division of Geology and Earth Resources. Data is based solely on surficial geology published at a scale of 1:100,000. A liquefaction susceptibility map provides an estimate of the likelihood that soil will liquefy as a result of earthquake shaking. This type of map depicts the relative susceptibility in a range that varies from very low to high. Areas underlain by bedrock or peat are mapped separately as these earth materials are not liquefiable, although peat deposits may be subject to permanent ground deformation caused by earthquake shaking. High Moderate to High Moderate Low to Moderate Low Very Low to Low Very Low Bedrock Peat Water Ice 0 0.5 1 Miles Susceptible Not Susceptible Base Map Data Sources: King County, U.S. Geological Survey ---PAGE BREAK--- ^ Lake Sammamish Sammamish River 520 REDMOND WEST LAKE SAMMAMISH CLEVELAND AVONDALE BELLEVUE-REDMOND WOODINVILLE-REDMOND 228TH 124TH 85TH 90TH 128TH REDMOND-FALL CITY 133RD 154TH SAHALEE 164TH 148TH 160TH CITY OF REDMOND . Base Map Data Sources: King County, U.S. Geological Survey 0 0.5 1 Miles National Earthquake Hazard Reduction Program (NEHRP) Soil Classification Soil classification data provided by Washington State Department of Natural Resources, Geology and Earth Resources Division. The dataset identifies site classes for approximately 33,000 polygons derived from the geologic map of Washington. The methodology chosen for developing the site class map required the construction of a database of shear wave velocity measurements. This database was created by compiling shear wave velocity data from published and unpublished sources, and through the collection of a large number of shear wave velocity measurements from seismic refraction surveys conducted for this project. All of these sources of data were then analyzed using the chosen methodologies to produce the statewide site class maps. Site Class B - Rock Site Class C - Very Dense Soil, Soft Rock Site Class D - Stiff Soil Site Class E - Soft Soil ---PAGE BREAK--- ^ FEMA DFIRM Flood Hazard Areas Lake Sammamish Sammamish River 520 REDMOND WEST LAKE SAMMAMISH CLEVELAND AVONDALE BELLEVUE-REDMOND WOODINVILLE-REDMOND 228TH 124TH 85TH 90TH 128TH REDMOND-FALL CITY 133RD 154TH SAHALEE 164TH 148TH 160TH CITY OF REDMOND . Flood hazard areas as depicted on draft FEMA Digital Flood Insurance Rate Maps (DFIRM). The 1 percent annual flood hazard is commonly referred to as the 100 year floodplain. The 0.2 percent annual flood hazard is commonly referred to as the 500 year floodplain. 0 0.5 1 Miles Base Map Data Sources: King County, U.S. Geological Survey Floodway 1 Percent Annual Flood Hazard 0.2 Percent Annual Flood Hazard ---PAGE BREAK--- ^ Landslide Hazard Areas Lake Sammamish Sammamish River 520 REDMOND WEST LAKE SAMMAMISH CLEVELAND AVONDALE BELLEVUE-REDMOND WOODINVILLE-REDMOND 228TH 124TH 85TH 90TH 128TH REDMOND-FALL CITY 133RD 154TH SAHALEE 164TH 148TH 160TH CITY OF REDMOND . 0 0.5 1 Miles Base Map Data Sources: King County, U.S. Geological Survey All Hazard Areas The landslide hazard areas shown have been merged from three assessments for use for planning purposes: WA DNR Landslide Areas data provided by the Washington State Department of Natural Resources, Division of Geology and Earth Resources. This dataset contains 1:24,000-scale polygons defining the extent of mapped landslides in the state of Washington, compiled chiefly from pre-existing landslide databases created in different divisions of the Washington State Department of Natural Resources to meet a variety of purposes. King County Slide Areas - Landslide areas are areas subject to severe landslide risk identified in the Sensitive Areas Ordinance as: A. Any area with a combination of: 1. Slopes greater than 15 % 2. Impermeable soils (typically silt and clay) frequently interbedded with granular soils (predominantly sand and gravel) 3. Springs or groundwater seepage. B. Any area that has shown movement during the Holocene epoch ( from 10,000 years ago to present), or that is underlain by mass wastage debris of that epoch. C. Any area potentially unstable as a result of rapid stream incision, stream bank erosion or undercutting by wave action. D. Any area that shows evidence of, or is at risk from, snow avalanches. E. Any area located on an alluvial fan, presently subject to or potentially subject to inundation by debris flows or deposition of stream-transported deposits. Slope/Soils Analysis: 1. Areas of slope greater than 40%. Slope determined using a DEM generated from 2002 LiDAR data. Slope data provided by King County DNRP. 2. Areas of Qf (alluvial fans), Qls (discrete landslides), and Qmw (colluvium and the cumulative debris from small indistinct landslides that accumulate on and at the base of unstable slopes) soils as identified in surface geology data provided by King County DNRP. ---PAGE BREAK--- ^ 2008 LANDFIRE Fire Behavior Fuel Model Lake Sammamish Sammamish River 520 REDMOND WEST LAKE SAMMAMISH CLEVELAND AVONDALE BELLEVUE-REDMOND WOODINVILLE-REDMOND 228TH 124TH 85TH 90TH 128TH REDMOND-FALL CITY 133RD 154TH SAHALEE 164TH 148TH 160TH CITY OF REDMOND . Fuel Class data (LANDFIRE REFRESH 2008 (lf_1.1.0)) provided by the Wildland Fire Science, Earth Resources Observation and Science Center, U.S. Geological Survey. The LANDFIRE fuel data describe the composition and characteristics of both surface fuel and canopy fuel. Thirteen typical surface fuel arrangements or "collections of fuel properties" (Anderson 1982) were described to serve as input for Rothermel's mathematical surface fire behavior and spread model (Rothermel 1972). These fire behavior fuel models represent distinct distributions of fuel loadings found among surface fuel components (live and dead), size classes and fuel types. The fuel models are described by the most common fire carrying fuel type (grass, brush, timber litter or slash), loading and surface area-to-volume ratio by size class and component, fuelbed depth and moisture of extinction. FBFM1 FBFM2 FBFM3 FBFM5 FBFM6 FBFM8 FBFM9 FBFM10 FBFM11 Developed Agriculture Water Barren 0 0.5 1 Miles Anderson 13 Fuel Classes Non-Burnable Burnable Base Map Data Sources: King County, U.S. Geological Survey