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Home My WebLink AboutPacket Water Work Session Feb 13 2024Whatcom County Council Water Work Session COUNTY COURTHOUSE 311 Grand Avenue, Ste #105 Bellingham, WA 98225-4038 (360) 778-5010 Meeting Agenda Tuesday, February 13, 2024 10:30 AM Civic Center Building Conference Room / Hybrid Meeting HYBRID MEETING - (PARTICIPATE IN -PERSON, SEE REMOTE JOIN INSTRUCTIONS AT www.whatcomcounty.us/joinvirtualcouncil, OR CALL 360.778.5010) COUNCILMEMBERS Barry Buchanan Tyler Byrd Todd Donovan Ben Elenbaas Kaylee Galloway Jon Scanlon Mark Stremler CLERK OF THE COUNCIL Dana Brown -Davis, C.M.C. Council Water Work Session Meeting Agenda February 13, 2024 Call To Order Roll Call Announcements Individuals who require special assistance to participate in the Council's meetings are asked to contact the Council Office at 360.778.5010 at least 96 hours in advance. This committee meeting is also noticed as a meeting of the Whatcom County Council, with the agenda limited to committee business. Meeting Materials AB2024-012 Meeting Materials for Water Work Session February 13, 2024 Water Issues Update Overview of Lake Whatcom Management Program Hudson Road Bridge Repair WRIA 1 Planning Unit update Other Business Adjournment Whatcom County Page 2 Printed on 411812025 • Whatcom County COUNTY COURTHOUSE 311 Grand Avenue, Ste #105 Bellingham, WA 98225-4038 (360)778-5010 • Agenda Bill Master Report File Number: AB2024-012 File ID: AB2024-012 Version: 1 Status: Agenda Ready File Created: 12/12/2023 Entered by: KFelbing@co.whatcom.wa.us Department: Council Office File Type: Receipt of Document(s) Assigned to: Council Water Work Session Final Action: 02/13/2024 Agenda Date: 02/13/2024 Enactment #: Primary Contact Email: kfelbing@co.whatcom.wa.us TITLE FOR AGENDA ITEM: Meeting Materials for Water Work Session February 13, 2024 SUMMARY STATEMENT OR LEGAL NOTICE LANGUAGE: None HISTORY OF LEGISLATIVE FILE Date: Acting Body: Action: Sent To: 02/13/2024 Council Water Work Session RECEIVED Attachments: Agenda and Packet, Hudson Road Bridge Repair Presentation, Lake Whatcom Stormwater Presentation Whatcom County Page 1 Printed on 411812025 WHATCOM COUNTY PUBLIC WORKS DEPARTMENT ELIZABETH KOSA Director MEMORANDUM NATURAL RESOURCES 322 N. Commercial Street, Suite 110 Bellingham, WA 98225 Telephone: (360) 778-6230 FAX: (360) 778-6231 www. wh a tco m c o un tV. us TO: The Honorable Satpal Singh Sidhu, Whatcom County Executive, and Honorable Members of the Whatcom County Council THROUGH: Elizabeth Kosa, Director FROM: Gary S. Stoyka, Natural Resources Program Manager DATE: February 6, 2024 RE: February 13, 2024 Council Water Work Session Please refer to the proposed agenda below for the next Water Work Session. Additional supporting documents may be distributed at or before the meeting. AGENDA Date: Tuesday, February 13, 2024 Time: 10:30 a.m. to 12:00 p.m. Place: Hybrid Meeting: In Person: Civic Center Garden Level Conference Room (322 N. Commercial St., Street Level) Virtual: For instructions on how to watch or participate in this meeting, please visit us at www.whatcomcounty.us/joinvirtualcouncil or contact the Council Office at 360.778.5010. View meeting schedules, agendas, minutes, videos, and archives at www.whatcom.legistar.com. Time Topic Council Action Background Information Requested Attached 10:30 AM — Water Issues Update Informational None 10:45 AM 10:45 AM — Overview of Lake Whatcom Management Informational None 11:30 AM Program 11:15 AM — Hudson Road Bridge Repair Informational None 11:45 AM 11:45 AM — WRIA 1 Planning Unit update Informational None 12:00 PM If you have questions, please feel free to call me at (360) 778-6218. cc: Dana Brown -Davis Kristi Felbinger Jill Nixon Jennifer Schneider Karen Frakes Erika Douglas John Thompson Paula Harris Kraig Olason Chris Elder Cathy Craver Doug Ranney Melissa Donnelly Roland Middleton Erin Page Josh Fleischmann Mark Personius Tyler Schroeder Sue Sullivan Brandy Reed Bennett Knox Hudson Bridge Repair Project Background • History of debris flow damage from Jones Creek • Sole access for community is Turkington Rd • Property purchased for Berm Project and emergency access via Hudson Rd • Hudson Bridge damaged in 2021 and eligible for FEMA reimbursement r M NO I W& Emergency Access Hudson Rd Bridge 0 0 0 IPO 51 In - _ - - iF. - '; R .. -`} �� .. n�� _ ... •- -. q ni .,. '�' "� ice.: -- .� � .' J'• .' - -�i ieS r _ ,,i drat• - �,�, - ■ a_ f� Ail Looking North io !: Looking Upstream (West) i;, Lookine Downstream (East) N �,'S'4��y'�P ��. � .•�'. ;.-. can �?�i x"' i': • �z 7c a V- Looking Upstream (West) t`•4 .iai..si.,P.� - . ` fir. to-�w`, A �.i.W 7�' i'�5�[�C.r+. /' 7.1 Hudson Road Repair - Permit Conditions . o> ES PEED ER sjd� PRE-RDGD EDGE - OF RD&D SURFACE _ • Proposed Repair is minor �' r ti FILL IN 7RI5 REGION RSSUA7.6 7(7 BE • WDFW Permit will onlyallow temporary repair with a FILL bF �Ii CIRAI kQS COR5�kUCTIOH p EITHER DUE TO THE ROAD FILL PRISWU CI EXr-WAnew bridge within 5 yrs BRIDGE REIXJIRED FOR SET NG �4kPR}S. k45T-kfPAIR OHW MIDGE FC?4TING5 If repair is pursued, staff recommends feasibility study , =-:� = r tR� Y r and alternatives analysis to determine appropriate permanent solution for community. %f T BREPAIR EkIfMTS .... ___- TO BEE REPAIREDLAR LL BE +CR To BE Eimn U �,i f (/ � DRI[ DICK N e I ' II OG CLEAR FLOOD DEBRIS AmP O C �Y REOPoLDE ROAD kPPROM1DN REBUILD DAkiNGE6 R{UD PRISM PRE -FLOC AM •. ►� REBUILD F" PRISM POST f+EP+/i OHIk _ l �_ � A �� ACME "DINE F6PL,aCIT FILL ASSIXWED WITH ORIGIKAL FLODD-17EP0SIT[D L\�I ' � ■ fRaAD CI)ISISMUCT1 H EFDAER DUE TO VATERWL THE ROAD FILL PRISM OR ERG4YAnON REQUIRED FOR SETTING BRIDGE FOOTINGS I �V�ll , �il, �# � • � r�6 s� .i` 'jl +� � Q � ,iPOR aaa+ -gem as 7AP nm � awoo Proposed Path Forward • Confirm Study and new bridge will be reimbursable by FEMA • Perform temporary repair summer 2024 • Begin Alternatives Analysis/Feasibility Study Fall 2024 • Consider the following for Study: • Road standards and objectives • WDFW Hydraulic code • Habitat work in project vicinity Floodplain connectivity `..` • FEMA reimbursement eligibility • Debris flow hazard reduction and resilience • Public concerns and property considerations • Coordinate with: Bridge & Hydraulics • Nooksack Tribe Avil • WDFW • WA State Military Dept/FEMA PRESENTATION TITLE OVERVIEW OF LAKE WHATCOM SW PROGRAM • QUESTIONS • ARE WE DOING ENOUGH TO MEET OUR 50 YEAR COMMITMENT? ARE WE GETTING BANG FOR THE BUCK FROM OUR PROGRAMS AND PROJECTS? IS THE LAKE WHATCOM STORMWATER UTILITY BEING MANAGED AND IS IT FUNCTIONING AS INTENDED? PRESENTATION TITLE OVERVIEW OF LAKE WHATCOM SW PROGRAM • PRESENTERS • KRAIG OLASON, DIVISION MANAGER - • OVERVIEW OF DIVISIONS PROGRAMS, FUNDING AND RELATIONSHIP TO INTENDED USE OF THE STORMWATER UTILITY • PRESENTATION SUMMARY CATHY CRAVER, SENIOR PLANNER, NPDES LEAD • OVERVIEW AND BACKGROUND ON LAKE MANAGEMENT PROGRAM, AND TMDL • CODY SWAN, ENGINEER 3, CAPITAL PROGRAM LEAD • RECAP OF CAPITAL PROGRAM AND SOME EXAMPLE OF LESSONS LEARNED %-� 11%1� .J STORMWATER DIVISION PROGRAM • STORMWATER DIVISION PROGRAM ACTIVITIES OCCUR PRIMARILY IN NPDES AREA, BBWARM DISTRICT AREA AND LAKE WHATCOM. • PROGRAM AREAS INCLUDE: • EDUCATION AND OUTREACH • CAPITAL PROJECT • MAINTENANCE AND SMALL WORKS PROJECTS • NEIGHBORHOOD NATIVE LANDSCAPE PROGRAM (FORMERLY HOMEOWNER INCENTIVE PROGRAM) • MONITORING AND SAMPLING • PLANS AND STUDIES • GENERAL ADMINISTRATION .. STORM WATER DIVISION FOCUS AREAS Blai I 1 f � f ` d `i Bach Bay I ` ^ 4 BBWARM Stormwater Utilty, Area - \ I r . _ . Funded Stormwater Utility Service Area ® NPDES Managed Areas Lake Samish Watershed Incorporated Cities 0 2 4 a Miles N Map Produced: 2I2024 - Whatcom County Public Works Stormwater ;Sum J^ Whatcom County Primary Stormwater Work Areas - _ 4 r I- Lynden __ ! �I t Evers n I .- { f j _ I t t 4 T 3 10 �4. Ferndale � — fw \ 4 Lake Whatcom Stormwater Utilty Area • �sco ham Bay ay � .i .f 1 c + , J h ccm C Skagit Co Nhat— County STORMWATER DIVISION PROGRAM • NPDES PHASE 2 PERMIT - PROVIDES THE STRUCTURE TO SW DIVISION PROGRAMS. • NPDES PERMIT FRAMEWORK WAS USED TO DEVELOP EACH OF THE 3 COMPREHENSIVE STORMWATER PLANS BIRCH BAY - 2006 BBWARM (SW UTILITY) LAKE WHATCOM - 2008 LAKE WHATCOM STORMWATER COMP PLAN, NOW A UTILITY • LAKE SAMISH BASIN - 2012 DID NOT FORM A STORMWATER UTILITY • THE COMPREHENSIVE STORMWATER PLANS PROVIDE DIRECTION FOR SW PROGRAMS LIM STORMWATER DIVISION PROGRAM EXAMPLES OF TYPICAL FUNDING ARRANGEMENT Target Area(si NPDES Phase 2, BBWARM, LWSU, LSB BBWARM, LWSU - other Funded by Notes kL NPDES permit area and SW Utilities NPDES area Road, BBWARM, NPDES provides basic funding, each utility pays for utility specific LWSU, Grants programs — newsletters, events etc. BBWARM, LWSU, Projects paid by each utility. Currently SW is not funded to BEET, Road, grants carryout retrofits beyond utility areas. Road, BBWARM, NPDES required projects are paid with Road funds, others are LWSU paid by BBWARM or LWSU Road, General repair and maintenance is funded by Road BBWARM,LWSU Water quality facility maintenance and repair is covered by each utility %--� 11%1� LAKE WHATCOM STORMWATER UTILITY STORMWATER UTILITY EXPENDITURES 2023 AS A PERCENT OF ESTIMATED TOTAL LAKE WHATCOM MANAGEMENT PROGRAM COSTS Actual funding breakdown in 2023 Funding Source LWSU Grants Road REET FCZD General Fund Annual costs Percent $ 341,963 13% $ 740,000 28% $ 336,200 14% $ 517,862 19% $ 434,446 16% $ 270, 000 10% Total for Lake Whatcom Program -$ 2,690,471 100% M . .� LAKE WHATCOM STORMWATER UTILITY STORMWATER UTILITY EXPENDITURES 2023 BY PROGRAM AREA 23 L SU Program Areas Total Percent Administration & Program Management 10.8% Capital Improvement Dro lads 3. C 6 55.5 Maintenance & Sma I I Works C6_ 1 _ 14.6 Monitoring, Reports & Studies �__. � ` � �� 1.6% Enhanced Education &Outreach 35,46i.2-8 4.7 Private Prope rty I m prove m e rat s - H I D & N IN LE 598,245.9 - 12. 9 FTOZ-1 7 51.r-9 52-. 5 S 1.00%] $1,40Q,OW S 1r200400D $1,00040Co �8 ,00o $60(k000 $4004000 $20Q,OJ0 LAKE WHATCOM STORMWATER UTILITY LW U Revenue & Expenditures Adoin/Program Expenses CIP Experises 2021) 2021 20V 2M 2024 2025 2W6 M2 2026 V � LAKE WHATCOM STORMWATER UTILITY 9 FUNDS USED TO INCREASE NUMBER OF CAPITAL PROJECTS C R C R F F C, H I I V I M N n P R S T II Rem Pray Database ID �Es Previous Expenditures 2024 i 2026 Tars 2027 i 21029 Amount Source Phase Amount Source Phase Amount Source Phase Amount Source Phase Amount Source Phase Amount Source No. No. LAKE WHATCOM STORMWATER SWP#SWLW23-04Academy Road Stormwater 1,53E, v REE—; L'65U PE 25,000 LWSU PE PE PE FE Improvements: Evaluate the water quality performance of RW RW RW RW RW 1 theexistingAcademystormwatersystem and provide 2U-iY05 63.9 CN CN CN CN CN recommended retrofits. CN 5 70,0W LWSU CN CN CN CN SWP#SWLW23-03Geneva Bioretention Pilot Project: Install 5 1,0WOW REET/Grant/LWSU PE PE PE PE PE new water quality treatment media, evaluate the RW RW RW RW RW 2 effectiveness and constructability of new water quality 24 446 639 CN 5 90,0W ECY Grant CN CN CN CN treatment media CN $ 22,000 BEET CN CN CN CN SWP #SWLW23-01 Silver Beach Creek Stormwater $ 250,000 BEET f LWSU PE 5 40,0011 LWSU PE PE PE PE 3 Improvements Phase2: Main channel restoration below 07-095 60.5 RW 5 20,0011 BEET CN $ 5W,0011 BEET RW CN RW CN RW CN RW CN Hillsdale using natural vegetation CN 5 250,000 LWSU CN CN CN CN EagleridgeStarmwater improvements: Install a water $ 15,000 LWSU PE 5 280,000 BEET PE PE PE PE 4 quality system to treat stormwaterfrom the Eagleridge 20-007 51.4 RW $ 15,OOD LWSU CN RW CN $ 500,000 LWSU RW CN RW CN RW CN development. CN CN CN CN CN Austin CourtStormwaterImprovements:Installwater PE 5 200,000 LWSU PE PE PE PE 5 20-008 58.8 RW 5 25,0W BEET RW RW RW RW qualitysystem on the discharge -from Austin Court. CN CN CN 5 450,000 LWSU CN CN 5 12,000 LWSU PE 5 60,0W FEMA PE PE PE PE SWP#SWLW2.3-05 Cedar Hills Culvert Replacement: PE 5 100,000 BEET PE PE PE PE 6 Replacement of culvert damaged duringthe 2021 23-001 44.2 RW 5 15,0W LWSU RW RW RW RW fl ood i ng event w ith F EMA fu n d i ng contri buti on. CN CN $ 180,000 FEMA CN CN CN CN CN $ 25,000 REET CN CN CN � LAKE WHATCOM LAKE WHATCOM TOTAL MAXIMUM DAILY LOAD (TMDL) • 1998 LISTED ON EPA'S 303(D) LIST AS AN IMPAIRED WATER BODY OF THE STATE. • 2016: FINAL TMDL ADOPTED WITH THE GOAL TO MEET WATER QUALITY STANDARD FOR DISSOLVED OXYGEN IN THE LAKE. • ADDITIONAL PHOSPHORUS ATTRIBUTED BY DEVELOPMENT IDENTIFIED AS KEY CONTRIBUTOR LOWERING DISSOLVED OXYGEN LEVELS IN LAKE. • TMDL SEPARATES COMMERCIAL FORESTRY FROM OTHER ZONING. IN TMDL, COMMERCIAL FORESTRY "ASSIGNED" AS NATURAL LOAD FROM FORESTS, AND IS NOT ALLOCATED TO COB OR WC TO ADDRESS. • 50-YEAR TIMEFRAME TO FORECAST ACTIONS TO HELP BRING DISSOLVE OXYGEN LEVELS BACK TO WATER QUALITY STANDARDS. • JURISDICTIONS ESTABLISH 5 AND 10 YEAR MILESTONES AND UTILIZE ADAPTIVE MANAGEMENT TO TRACK PROGRESS. f LAKE WHATCOM MODELING AND MONITORING • ONGOING LAKE MONITORING AND TRIBUTARY WITH THE INSTITUTE FOR WATERSHED STUDIES. • 2016: CITY OF BELLINGHAM UPDATED LAKE LOADING MODEL (HFAM). • 2007-2020: LAKE WHATCOM TRIBUTARY MONITORING PROGRAM WITH BROWN AND CALDWELL. (JOINT EFFORT BETWEEN CITY OF BELLINGHAM, WHATCOM COUNTY, AND LAKE WHATCOM WATER AND SEWER DISTRICT.) • 2020: WHATCOM COUNTY INITIATED UPDATE OF CE-QUAL W2 LAKE RESPONSE MODEL AND LAKE WHATCOM TMDL REASSESSMENT PROJECT. • CE-QUAL W2 UTILIZES UPDATED LOADING DATA TO MODEL DISSOLVED OXYGEN LEVELS IN LAKE WHATCOM IN ORDER TO MEET STATE WATER QUALITY STANDARDS. • ONGOING EFFECTIVENESS MONITORING OF STORMWATER FACILITIES AND MEDIA. • ONGOING IDENTIFICATION OF ADDITIONAL STUDIES TO REDUCE UNCERTAINTY IN MODELS. LAKE WHATCOM MANAGEMENT PLAN (LWMP) & LAKE WHATCOM TMDL-APPENDIX 2 REPORTING • 1992 CITY OF BELLINGHAM, WHATCOM COUNTY AND THE LAKE WHATCOM WATER AND SEWER DISTRICT ESTABLISHED FOUNDATION FOR LAKE PROTECTION. FOLLOWED BY 1998 PROGRAM INCEPTION. FIRST WORK PLAN (I-YEAR)1999, FOLLOWED UP WITH 5-YEAR WORK PLANS (5 PLANS TO DATE) • ANNUAL REPORTING OF ALL LAKE WHATCOM ACTIVITIES AT THE JOINT COUNCILS AND COMMISSIONERS MEETING. (MARCH 27T") • REQUIRED ANNUAL REPORTING OF APPENDIX 2 TASKS AS PART OF THE WESTERN WASHINGTON PHASE II MUNICIPAL STORMWATER PERMIT. (5 & 10 YEAR MILESTONES REPORTED) �4r sr�.d by enc us: whaeram .ffjur4sdrchorel Coortlin g Team 11.w \44� Lake Whatcam Management Program 2020-2024 Work Plan March 2020 KEY LAKE MANAGEMENT ACTIONS TAKEN WITHIN WHATCOM COUNTY (NON -CAPITAL) • 1993: SUDDEN VALLEY COMMUNITY ASSOCIATION INITIATED A DENSITY REDUCTION PROGRAM REMOVING DEVELOPABLE LOTS (APPROX. 1,400 UNITS) • 1999: ENHANCED DEVELOPMENT STANDARDS; WITH MULTIPLE AMENDMENTS UNTIL 2013 WITH WCC 20.50 LAKE WHATCOM WATERSHED OVERLAY • 2002: SEASONAL CLEARING THRESHOLDS • 2002-2004: COUNTY -CITY -DISTRICT ACQUIRED PERMANENT RESTRICTIVE COVENANTS ACROSS SUDDEN VALLEY (OVER 300 UNITS) • 2004: DOWNZONE OF PROPERTIES SUBDIVIDED INTO LESS THAN 5 ACRE PARCELS IN 2003 (APPROX. 7,800 UNITS) • 2004: DNR LAKE WHATCOM LANDSCAPE PLAN • 201 3: ADOPTION OF THE WCC 20.51 LAKE WHATCOM WATERSHED OVERLAY • 2014: LAKE WHATCOM LAND RECONVEYANCE (APPROXIMATELY 8,800 ACRES) • 2014: ENHANCED STREET SWEEPING IN LAKE WHATCOM WATERSHED (REMOVES APPROX. 30 LBS OF PHOSPHORUS ANNUALLY) • 2016: SUDDEN VALLEY STORMWATER MANAGEMENT AND PHOSPHORUS MITIGATION PLAN • 2016: TMDL ADOPTED • 2016: WHATCOM COUNTY ADOPTED ACCELERATED INSPECTION AND CLEANING SCHEDULES FOR CATCH BASINS • ONGOING EDUCATION AND OUTREACH (PET WASTE, YARD WASTE, NEIGHBORHOOD NATIVE LANDSCAPING PROGRAM, ETC.) � i r Legend i WLA, 6E LLIN GH AM v f 4 1 - WLA, WHATCOM r 1- pWLA, WHATCC) M LA, COUNTY r I� 5 E Mpm. 1 q } 7i D �j '1 k` A BRIEF HISTORY OF THE EVOLUTION OF THE STORMWATER CAPITAL PROGRAM IN LAKE WHATCOM EARLY DAYS OF STORMWATER PROJECT DEVELOPMENT ➢ PROJECT WERE LOCATED IN THE GENEVA AREA ➢ THE PROJECTS FOCUS ON INFILTRATION USING BIOINFILTRATION SWALES ➢ TREATMENT FOR WATER QUALITY WAS PROVIDED THROUGH • BIOINFILTRATION SWALES • END OF THE LINE TREATMENT VIA STORMFILTER FAULTS � •I ' Li i. GS + Wall it 9 uirAr.ratlor Swalec ' ;bandy 8 III 4+ec ti 4e Hera at Rwvauff { �ucth Et. 3ialntlltratlan 1ri31eL ' [Sandy Sol Matlla w UrryerdFaIni 1 LK WHATCOM COMP. PLAN (CH2M HILL 2008) (COUNCIL APPROVED 2008) • Control erosion in ditches and creeks, on already developed property and construction sites • Reduce stormwater runoff volumes and velocities • Infiltrate stormwater to provide natural treatment • Provide source control • Infiltrate rainfall on -site • Minimize peak flows • Control runoff volumes • Stabilize stream channels • Re -vegetate degraded riparian corridors 0 1 t ut+.. Lid r-t� - L:dp La-d PROJECTS COMPLETED: LK WHATCOM COMP. PLAN (CH2M HILL 2008) 2005 & 2012 DOE MANUAL USED FOR DESIGN OF BMPS 2010 LAHTI DRIVE • BIO-INFILTRATION SWALE 2011-2012 SILVER BEACH CREEK • BIO-INFILTRATION SWALE & STORMFILTER CARTRIDGE VAULT (EMERGING TECHNOLOGY) 2013-2014 CORONADO-FREMONT PHASE 1 &2 • PHASE 1 - BIO-INFILTRATION SWALE & STORMFILTER CARTRIDGE VAULT (EMERGING TECHNOLOGY) • PHASE 2 - SETTLING POOLS (FLOW MGMT.) W/ STORMFILTER CARTRIDGE VAULT (EMERGING TECHNOLOGY) WATER RESOURCE IMPROVEMENT PLAN (WRIP) (COUNCIL APPROVAL 2014) ➢ BEGINS PROGRAMMING OF CAPITAL PROJECTS FORECASTING b SIX YEARS OUT. ➢ BUDGETS FOR ACCOMPLISHMENT OF THESE TASKS. ➢ MECHANISM TO CONVEY THE PLAN TO COUNCIL AND THE COMMUNITY. Item udtdodse lu Project Description RES rre,ious ccpenuaures eoZ4 cucn cucu Huff coca iu�y TOW 140. No. Amoun[ Source Phase Amoun[ Source Phase Amoun[ Source Phase Amount Source Phase Amoun[ Source Phase Amoun[ Source Phase Amoun[ Source 01 jehyjj 1 i SWP#SWLW2304 Academy Road Storm Ovate r $ 1,R35,000 REET /L75U PE :S,-.-.0 L'A15U PE FE FE FE FE Improvements: Evaluate the water qua ty performance of RW RW RW R1^1 RW RW 1 20-005 63.9 CN CN CN CN CN CN the existing Academy stormwatersyste m and provide recommended retrofits. CN 5 70,0011 LWSU CN CN CN CN CN SWPRSWLW23-03Geneva Bioretention Pilot Project:Install $ 1,0110,0110 REET/Grant/LWSU PE PE PE PE PE PE 2 new water quality treatment media, evaluatethe 20-006 63.9 RW RW RW RW RW RW $ 1,112,000 effectiveness and constructability of new water quality CN 5 90,000 ECY Grant CN CN CN CN CN treatment media CN 5 22,0011 BEET CN CN CN CN CN SWP#SWLW2301 Sihrer Beach Creek Stormwater 5 250,OW REET/LWSU PE 5 40,OM LWSU PE PE PE PE PE 3 Improvements Phase 2: Main below 07-095 60.5 RW 5 20,0011 BEET RW RW RW $ 1,160,0W channel restoration CN $ 6t10,00[I BEET CN CN CN CN CN CN CN Hillsdale using natural vegetation CN $ 250,0011 LWSU CN CN CN CN CN E agl eridge Stormwater Improvements: Install a water 5 15,OW LWSU PE 5 281,0011 BEET PE PE PE PE PE 4 l Jtysystem to treat stormwater from the Eagleridge 20-007 61.4 RW 5 15,0011 LWSU RW RW RW RW RW $ 810,000 qua CN CN 5 500,000 LWSU CN CN CN CN development. CN CN CN CN CN CN Austin Court Stormwater Improvements: Installwater PE 5 200,0011 LWSU PE PE PE PE PE 5 20-008 59.9 RW $ 25,0011 BEET RW RW RW RW RW $ 575,000 qualitysystem on the discharge from Austin Court. CN CN CN $ 450,000 LWSU CN CN CN 5 12,OW LWSU PE $ 60,0M FEMA PE PE PE PE PE SWP#SWLW23G5Cedar Hills Culvert Replacement: PE 5 100,0011 REET PE PE PE PE PE 5 Replacement of culvert damaged during the 2021 23-Wi 44.2 RW 5 15,001I LWSU RW RW RW RW RW 5 392,000 flooding event with FEMA funding contribution. CN CN 5 181,000 FEMA CN CN CN CN CN CN 5 25,000 REET CN CN CN CN ADOPTION OF THE TMDL (APRIL 2016) J ➢ DEFINES A TARGET GOAL FOR PHOSPHORUS REDUCTION IN THE WATERSHED. ➢ IT IS A COLLABORATION WITH THE CITY AND LK. WHATCOM WATER AND SEWER TO IMPROVE WATER QUALITY. ➢ THE ACADEMY ROAD PROJECT IS COMPLETE THROUGH THE COLLABORATION BETWEEN THE COUNTY AND THE CITY. m LK WHATCOM COMP. PLAN: STORMWATER CAPITAL PROGRAM UPDATE (HERRERA 2017) (COUNCIL APPROVAL NOV. 2017) LADE WHATCOM COMPREHENSIVE PLAN: ➢ COLLECT INFORMATION FROM THE PUBLIC AND LAKE STORMWATER CAPITAL PROGRAM UPDATE WHATCOM MANAGEMENT PROGRAM PARTNERS ON KNOWN WHATCOM COUNTY, WASHINGTON DRAINAGE PROBLEMS AND POSSIBLE WATER QUALITY TREATMENT PROJECTS. ➢ EVALUATE AND PRIORITIZE PROPOSED PROJECTS BASED ON PRELIMINARY COST ESTIMATES AND ESTIMATED PHOSPHORUS LOAD REDUCTION. ➢ CONCEPTUAL ENGINEERING ANALYSIS TO IDENTIFY AND SCOPE NEW CAPITAL PROJECTS. ➢ DEVELOP CONCEPTUAL DESIGNS FOR PRIORITY CAPITAL PROJECTS. PREPARED FOR WHATCOM COUNTY PUBLIC WORKS Prepared by Herrera Environmental Consultants, Inc. _a HERRERA ti..J j V PROJECTS COMPLETED: LK WHATCOM COMP. PLAN: STORMWATER CAPITAL PROGRAM UPDATE(HERRERA 2017) 2012 W/ 2014 AMENDMENT & 2019 DOE MANUAL USED FOR DESIGN OF BMPS PROJECTS • 2016 CEDAR HILLS EUCLID • COMBINATION OF BIORETENTION SWALES AND STORMFILTER CARTRIDGE VAULT • 201 8-201 9 AGATE PHASE 1 &2 • RETROFIT DEVELOPMENT WITH STORMFILTER CARTRIDGE VAULT • 2020 NORTHSHORE/EDGEWATER • STORMFILTER CARTRIDGE VAULT • 2021 SILVER BEACH CREEK PHASE 1 • RETROFITING MODULAR WETLAND PRIVATE DETENTION POND AND THE EXISTING OUTFALL TO SILVER BEACH CREEK �� N.01 LAKE WHATCOM EAST GENEVA SUBWATERSHED � MASTER PLAN (TETRA TECH 2O21) ➢ DEVELOP AN ACCURATE, COMPREHENSIVE INVENTORY OF STORMWATER FACILITIES IN EACH OF THE SUBWATERSHED AREAS. ➢ CREATE A GUIDE FOR IMPLEMENTING CAPITAL PROJECTS TO ADDRESS DRAINAGE DEFICIENCIES IN A PRIORITIZED AND SCHEDULED MANNER. ➢ INCLUDED AND EVALUATED WATER QUALITY PROJECTS FROM THE LAKE WHATCOM COMPREHENSIVE PLAN: STORMWATER CAPITAL PROGRAM UPDATE (HERRERA, 2017). ➢ DEVELOP SITE -SPECIFIC OPTIONS FOR WATER QUALITY IMPROVEMENTS. ➢ DOCUMENT PROJECT NEEDS TO INCORPORATE INTO A COUNTYWIDE CAPITAL IMPROVEMENT PROGRAM. ➢ SEVERAL SMALL WORKS PROJECTS MEMORANDUM OF UNDERSTANDING: WHATCOM COUNTY AND SUDDEN VALLEY COMMUNITY ASSOCIATION (COUNTY ADOPTION 2021) • SUDDEN VALLEY (PRIVATE DEVELOPMENT) IS THE LARGEST DEVELOPMENT IN THE LAKE WHATCOM WATERSHED WITH OVER 7,000 RESIDENTS THAT PROVIDE A SIGNIFICANT PORTION (>50%) OF THE TOTAL COLLECTED REVENUES BY THE LAKE WHATCOM STORMWATER UTILITY. • IMPLEMENTING TREATMENT AND BEST MANAGEMENT PRACTICES IN STORMWATER CAPITAL PROJECTS IN SUDDEN VALLEY IS CRITICAL FOR MEETING TMDL OBJECTIVES • THE SVCA WILL GRANT PERMANENT EASEMENTS TO THE COUNTY FOR TREATMENT FACILITIES AND ALLOW ACCESS FOR INSPECTION, REPAIR, AND MAINTENANCE. • THE COUNTY WILL COLLABORATE AND COORDINATE PROJECTS WITH SVCA'S LONG TERM CAPITAL PROGRAM. Land Development within Total Acres Managed by Condo Association: 1,553 Sudden Valley Condo Assoclaiton Developed Acres: 677 << Undeveloped Acres: 875 Existing Dwelling Units: 2,712 (1/23 COB Buildout Analysis) ,. Average Dwelling Units per Developed Acre: 4 t`��J�j� -- ..,✓,. _ Or ,'.�, tad° - Sudden Valley Condo Assoc. r Subwatershed Boundary I Filter Vault Filter Vault Basins M iM2�12 P i' Developed Shoreline y Developed Parcels µ: f� Undeveloped Parcel Zoning _ - R5A Undeveloped .. - A, t RR3 Undeveloped 0 0.1 02 � Miles _. �,,r _, r• Ay . _ ill .•'9LAKERIDGE CONDOMINIUMS _ r- �Y i MAINTENANCE ➢ IMPROVING KNOWLEDGE BASE THROUGH ROUTINE MAINTENANCE. ➢ CARTRIDGE VAULT EVALUATION ➢ CONTROL STRUCTURE CLEANING ➢ ENHANCED SCHEDULE --: RETROFIT PROJECT PRECIPITATED FROM LESSONS LEARNED CONTINUED 2023 GENEVA BIORETENTION PILOT PROJECT LAKE WHATCOM EAST GENEVA SUBWATERSHED MASTER PLAN • UTILIZED EMERGING TECHNOLOGY ABSORPTIVE MEDIA TO FILTER CONTAMINATES OUT OF STORMWATER • RECEIVED GRANT FROM DOE TO UTILIZE THIS MEDIA IN THE PROJECT • PERFORMING 2 YEAR POST CONSTRUCTION MONITORING TO INFORM THE EFFECTIVENESS OF THE MEDIA • COLLABORATING W/ KING COUNTY TO TEST FOR ADDITIONAL POLLUTANTS. 6PPD, HYDROCARBONS, FECAL • USED IMPERMEABLE LINER TO HAVE THE SYSTEM SELF CONTAINED • UTILIZED DOSING SIPHON TO ALLOW FOR MEDIA DRY OUT PERIOD RETROFIT PROJECT PRECIPITATED FROM LESSONS LEARNED CONTINUED 2024 ACADEMY ROAD STORMWATER IMPROVEMENTS • EXPANDED ON PRELIMINARY BASIN ANALYSIS TO MORE ACCURATELY INFORM OF CONTRIBUTING BASIN. EXPANDED KNOWLEDGE BASE ON EFFICACY OF MEDIA WITH DILUTED FLOWS FUNCTION OF TECHNOLOGIES UTILIZED WERE FURTHER UNDERSTOOD I.E. DRY OUT PERIOD a SUMMARY Maintenance Expenses for Treatment Vaults • 2023 MAINTENANCE EXPENSES FOR TREATMENT VAULTS • 24 TREATMENT VAULTS • TOTAL OF 262 CARTRIDGES • 2023 COSTS >$150,000 • >$600 PER CARTRIDGE SUMMARY Performance consideration for Treatment Vaults • DILUTION GREATLY AFFECTS EFFICIENCY (POUNDS OF PHOSPHORUS REMOVED) OF CARTRIDGE VAULTS. • SITING TREATMENT SYSTEMS REQUIRES AVOIDANCE OF THE FOLLOWING: INTERCEPTING OFF SITE DRAINAGE FROM FORESTED OR UNDEVELOPED AREAS • INSTALLING IN EXISTING DRAINAGE SYSTEMS THAT CONVEY OFFSITE FLOWS INSTALLING IN AREAS THAT RECEIVE BASE FLOW - INTERMITTENT STREAMS SUMMARY Performance consideration for Treatment Vaults • CAREFUL SITING CAN INCREASE CARTRIDGE EFFICIENCY AND SAVE ROMP • EDGEWATER LANE CAPITAL PROJECT • USED TIGHT -LINE PIPE TO BYPASS CLEAN WATER AROUND THE TREATMENT VAULT • REDUCED COSTS (ELIMINATED THE NEED FOR MORE THAN 10 CARTRIDGES AND ASSOCIATED INSTALLATION EXPENSE) • INSURED THE AREA TREATED WASN'T IMPACTED BY DILUTION • SAVED OVER $6000 DOLLARS/YEAR IN MAINTENANCE COSTS • REDUCED TOTAL AREA "TREATED" AND THEORETICAL TOTAL POUNDS TREATED .J ... � SUMMARY 2006 LW Comprehensive Stormwater Plan Executive Summary sulutl tarmwater Management Priorities VYM&r Quality and Phosphorus - Coontrol erosion in ditches and creeks, on already - developed property and construction sites - Reduce stormwatnr runoff volumes and velocities - Infiltrate etorrawatar to provide natural treatrnent - Provide source control Water Quantity Infiltrate rainfall on -site Minimize nimi peak flows Control runoff vo lu tries Aquatic Habitat - Stabilize stream channel & - Igo -vegetate degraded riparian corridors Phosphorus is difficult to rernove from stornnwaler once it is there_ Red ucina ohoso orus at its anti rce th r�Uo h wirle- reach Inn program matle sclutions can be more cost-effecfiye than attemp inn to remove it th rough storrriwater treatment_ No single type of solution exists for any of Lake h atcom .s problems- This pled recorri r iends $ combination of different lutions to target these problerns_ SUMMARY Measurement of progress toward 50 year goal • THE LW COMPREHENSIVE STORMWATER PLAN CREATED A GOOD OVERVIEW AND PROVIDED GOOD DIRECTION ON HOW TO PROCEED WITH WATER QUALITY IMPROVEMENT IN LAKE WHATCOM • THE STORMWATER CAPITAL PROGRAM UPDATE (2017) TOOK ANOTHER GENERAL LOOK AT OPTIONS FOR WATER QUALITY TREATMENT PROJECTS IN LAKE WHATCOM • THE EAST GENEVA SUB -WATERSHED MASTER PLAN (2021) IS THE FIRST IN A SERIES OF AREA SPECIFIC PLANS THAT ARE PLANNED TO PROVIDE A COMPREHENSIVE LIST OF TASKS AND PROJECTS TO IMPROVE WATER QUALITY IN LAKE WHATCOM SUMMARY Sub -watershed Master Plans — provide metrics of progress towards meeting 50 year goal • SUB WATERSHED MASTERPLANS PROVIDE A DETAILED ACCOUNTING FOR NEEDED IMPROVEMENTS THROUGH: • SITE SPECIFIC INVENTORY OF A LIMITED AREAS - 400 - 600 ACRES OF URBAN DEVELOPMENT PLUS CONTRIBUTING BASINS • INCLUDE PLAN LEVEL ANALYSIS OF THE AREA HYDROLOGY AND HYDRAULIC PERFORMANCE OF THE DEVELOPED DRAINAGE SYSTEM • THIS ANALYSIS IDENTIFIES CONSTRAINTS IN EXISTING DRAINAGE INFRASTRUCTURE • PROVIDE DETAILED SITE INSPECTION/INVENTORIES TO CREATE MAPPABLE LISTED SOURCES OF NONPOINT POLLUTION • INCLUDES COMPLAINTS LOGGED IN SW'S COMPLAINT DATA BASE SUMMARY Sub -watershed Master Plans — provide metrics of progress towards meeting 50 year goal • SUB WATERSHED MASTERPLANS PROVIDE A DETAILED ACCOUNTING FOR NEEDED IMPROVEMENTS THROUGH: • THE CREATION OF A WORK LIST FOR EACH SWMP AREA, IDNENTIFYING NEEDED IMPROVEMENTS WHICH ARE DIVIDED INTO THE FOLLOWING CATEGORIES: • CAPITAL IMPROVEMENT PROJECTS • SMALL WORKS PROJECTS • MAINTENANCE PROJECTS/NEEDS • IDENTIFIED SPECIAL STUDY AREAS • INCLUDES A PRIORITIZATION METHOD TO USE IN SCHEDULING PROJECTS/ACTIVITIES SUMMARY Sub -watershed Master Plans — provide metrics of progress towards meeting 50 year goal • AT LEAST 3 SWMPS ARE CONTEMPLATED FOR LAKE WHATCOM • EAST GENEVA - COMPLETED IN 2021 • WEST GENEVA/HILLSDALE, TO BE INITIATED IN 2024 • SUDDEN VALLEY - CONTEMPLATED FOR 2026/27 ..J SUMMARY Sub -watershed Master Plans — provide metrics of progress towards meeting 50 year goal • SWMPS ACTIVITY LISTS CAN BE COMBINED AS THEY COME ON LINE TO BUILD AN ANNUAL WORK PLAN AND MULTI -YEAR WORK PLANS • PROGRESS TOWARDS MEETING THE 50 YEAR GOAL CAN BE MEASURED AGAINST THOSE LISTS AND WORK PLANS • WHEN THE FINAL SWMP IS COMPLETED, THE PROJECTS CAN BE COMBINED INTO A FINAL LIST AND PRIORITIZED. ANNUAL REPORTS CAN REFERENCE PROGRESS TOWARD MEETING THOSE PRIORITIZED TASKS/PROJECTS • THE PLANS CAN INCORPORATE NEW PROJECTS/INFORMATION AS THEY BECOME SUMMARY Sub -watershed Master Plans — provide metrics of progress towards meeting 50 year goal • THERE IS A FINITE AMOUNT OF PROJECTS/TASKS THAT CAN BE DONE TO MEET THE REQUIREMENTS OF THE TMDL. • OUTREACH AND EDUCATION, MAINTENANCE OF INFRASTRUCTURE AND CONTINUING TO UPGRADE FACILITIES AS NEW TECHNOLOGIES COME ON LINE WILL EVENTUALLY BE THE PRIMARY WORK FOR THE STORMWATER DIVISION • IDENTIFYING, CATALOGING AND LAYING OUT WORK PLANS TO COMPLETE THE IDENTIFIED PROJECTS AND TASKS WILL BE THE FOCUS OF THE STORMWATER DIVISION FOR THE FORESEEABLE FUTURE • THIS WORK WILL BE GUIDED BY THE DETAILED ANALYSIS PROVIDED BY THE SWMPS AND OTHER STUDIES UNDERWAY OR CONTEMPLATED INTO THE FUTURE • FUTURE PROGRESS WILL BE TRACKED USING ANNUAL AND LONG TERM WORK PLANS SUMMARY Sub -watershed Master Plans — provide metrics of progress towards meeting 50 year goal • NEW METRIC • 6 AND 10 YEAR WORK PLANS • 6 YEAR PLAN UPDATED ANNUALLY • 10 YEAR PLAN UPDATED EVERY 5 YEARS • SOURCE FOR 6 AND 10 YEAR PLANS • SWMPS • OTHER STUDIES • IDENTIFIED EMERGING PROBLEMS