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Storm Water Management (FINAL)Storm Water ManagementStorm Water Management A presentation toA presentation to City Council City Council Planning & Zoning CommissionPlanning & Zoning Commission by theby the Quality Development Focus Area CabinetQuality Development Focus Area Cabinet January 27, 2009January 27, 2009 City of Southlake Strategy MapCity of Southlake Strategy Map The City of Southlake provides municipal services that support the highest quality of Fulfill Our lifefor our residents and businesses. We do this by delivering outstanding value and Mission unrivaled qualityin everything that we do. Deliver on Our Safety Mobility Infrastructure Performance Management Quality Partnerships and Securityand Service Delivery Developmentand Volunteerism Focus Areas C3 Provide attractive C4 Attract and keep top-tier C1 Achieve the C2 Provide travel Serve Our and unique spaces for businesses to drive a highest standards of convenience within Customers enjoyment of personal dynamic and sustainable safety and security city and region interests economic environment B2 Collaborate with B1 Implement andB3 Pursue B4 Provide high B5 Optimize Manage the select partners to share best practices innovative service quality customer use of Business implement service across all departmentsdelivery options service technology solutions F1 Achieve F2 Maintain or Provide F3 Invest to provide and F4 Maximize return competitive financial improve AA bond maintain high quality Financial on investments benchmarksrating public assets Stewardship L5 Actively promote L1 Ensure our L2 Enhance L3 Attract, L4 Recognize Promote opportunities for partnerships people understand leadership develop and and Learning and volunteer involvement the strategy and how capabilities to retain a skilled reward high and Growth (individual and group) they contribute to it deliver resultsworkforceperformers Live Our Core Values Integrity ƔInnovation ●Accountability ●Commitment to Excellence ●Teamwork PresentationPresentation •Review fundamentals •Overview regulatory environment •Identify roles and responsibilities •Outline strategy and funding •Discuss public policy issues •Answer legal questions FundamentalsFundamentals Fundamentals: FAQsFundamentals: FAQs National Flood Insurance Program Frequently Asked Questions Fundamentals: Key TermsFundamentals: Key Terms •Glossary of Terms •Examples: –Hydrology –Hydraulics –Impervious Coverage –Storm Water Runoff Fundamentals: Key Terms Fundamentals: Key Terms •100 yr Storm–a storm that has 1 in 100 or 1% chance of occurrence in any year •10 yr Storm-a storm that has 1 in 10 or 10% chance of occurrence in any year •2 yr Storm-a storm that has 1/2 or 50% chance of occurrence in any year 100100--Year Flood PlainYear Flood Plain FloodwayFloodwayFlood Flood Flood Flood FringeFringe FringeFringe Flood Plain Graphic Fundamentals: Fundamentals: Detention vs. RetentionDetention vs. Retention •Designed for 100 year storm •Retention–Permanently restrains flow of water. Generally provided for aesthetic purposes •Detention–Temporarily restrains flow of water to reduce downstream impact •Staged Discharge Retention Pond (with detention) Outfall Structure (High Flow) Outfall Structure (Low Flow) Detention portion of pond Detention Component (City) Retention Component (HOA) Retention Component HOA Responsibility City Responsibility Public Drainage Easement (City Responsibility) Direction of Private Amenity –Retention Pond (HOA) Flow Detention component (City Responsibility) Outfall Structure Retention component (HOA/POA Responsibility) Developer Agreement (Amenity) Fundamentals: Major BasinsFundamentals: Major Basins Regulatory EnvironmentRegulatory Environment Regulatory EnvironmentRegulatory Environment National Flood Insurance Program (NFIP) Administered by FEMA Southlake –NFIP participant since Feb 1974 Floodplain development/enforcement Administered by FEMA (USACOE possible involvement) City of Southlake –Enforcement Authority Environmental Quality of Creeks/Streams EPA TCEQ City of Southlake (Phase II municipality) Regulatory EnvironmentRegulatory Environment ••Texas Water LawTexas Water Law ––Cannot divert or block natural flow of waterCannot divert or block natural flow of water ––Cannot adversely impact other property Cannot adversely impact other property ownersowners Regulatory EnvironmentRegulatory Environment City Ordinances –Drainage Ordinances (217, 461 and 605) –Storm Water Utility (900 and 901) –Critical Drainage Structure Report –Storm Water Management Plan –Erosion Control Ordinance for Construction –Illicit Discharge Ordinance (Future) –Post Construction BMP Ordinance (Future) Roles & ResponsibilitiesRoles & Responsibilities Roles & ResponsibilitiesRoles & Responsibilities City Council and P&Z Pre-Plans Site Plan/ZoningReleased Construction Inspection & DRC DocumentsCertification Staff Staff Roles & Responsibilities: StaffRoles & Responsibilities: Staff •Draft/recommend proposed policy •NFIP/Floodplain administrator/ Enforcement •Review developments for compliance •Administer Storm Water Management Plan •Master Drainage Plan •CIP Implementation •Education outreach/ Information source •Storm water system maintenance Roles & Responsibilities: Roles & Responsibilities: Elected/Appointed OfficialsElected/Appointed Officials •Consider/adoption/establishment of –City drainage policy/ ordinances –Master Drainage Plan •Ensure proposed land development is consistent with Master Plans, ordinances and regulations •City Council adopts budget for CIP drainage related projects •Adopt storm water utility operating budget Roles & Responsibilities: Roles & Responsibilities: Property OwnerProperty Owner Per Section 9.02, Ordinance 605: •Maintain all creeks/natural drainage ways and all unimproved drainage easements on private property •Maintain borrow ditches and culverts –Periodic removal of underbrush, trash and debris, mowing and general upkeep of borrow ditch to maintain positive flow of storm water within ditch and culvert Storm Water ManagementStorm Water Management In SouthlakeIn Southlake Strategies & Funding Storm Water ManagementStorm Water Management and Fundingand Funding 402 Localized $ 26,482,772402 Localized $ 26,482,772 17 Secondary $ 5,753,81017 Secondary $ 5,753,810 20 Primary 20 Primary $ 19,679,074$ 19,679,074 $ 51,915,656*$ 51,915,656* * 2006 estimate* 2006 estimate Storm Water ManagementStorm Water Management and Fundingand Funding Storm Water Utility District –Adopted October 2006 –Residential Parcels: •$8/month fee –Non-Residential Parcels: •Fee = Allocated Portion of Parcel in square feet (SF) times residential monthly rate/s.f. Storm Water ManagementStorm Water Management and Fundingand Funding Cost-of-Service •Operations and Maintenance •Flood Control •Water Quality Broad Use of Funds •Existing Stormwater Problems •Future Improvements Bond Capacity Storm Water ManagementStorm Water Management and Fundingand Funding Drainage Projects Funded 13.4% Additional Drainage Projects Remaining 86.6% Storm Water ManagementStorm Water Management and Fundingand Funding Storm Water Utility District Collections Fiscal YearResidentialCommercialTOTAL 2007$687,899$329,871$1,017,770 2008$795,611406,327$1,201,938 2009*$257,116*$149,271*$406,387 $2,626,095$2,626,095 *To Date Storm Water ManagementStorm Water Management and Fundingand Funding •Capital Projects –Dove Drainage -$2.5 million •2300 L.F. of 8’ x 5’ Box culvert –100 yr storm •Debt service -$225,000/year •Operational Items –Borrow Ditch cleaning •January 2007 to present 10,000 LF –Culvert Installations: 1500 LF (various sizes). –Culverts cleaned and jetted: 3000 LF –Cubic yards sediment and debris removed: 15,000 CY Operational Issues (Cont’d) •Sod and hydro-mulch installed/cast: 11,000 SY •Rip rap material used for erosion in drainage channels/Creeks: 800 TON •Silt fence installed: 3000 LF •Catch basins installed: 5 units. •Exposed aggregate concrete flumes installed: 8,500 SF •Concrete channels cleaned: 3,000 LF Storm Water ManagementStorm Water Management and Fundingand Funding Public Education Public Involvement/ and Outreach on Illicit Discharges Participation Storm Water Impacts Construction Site Storm Pollution Prevention/ Post-Construction Water Runoff ControlGood Housekeeping Storm Water Management for Municipal Operations Public Policy IssuesPublic Policy Issues Public Policy IssuesPublic Policy Issues Public Versus Private Water • –An Issue of Responsibility Funding Challenges • –Project Prioritization –Storm Water Utility District –Supplemental Funding Sources Community Rating System • Legal FrameworkLegal Framework DiscussionDiscussion