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Home My WebLink About2021.1012.TCJWS.Agenda NOTICE OF MEETING JOINT WORK SESSION OF THE FOUNTAIN HILLS TOWN COUNCIL AND THE FOUNTAIN HILLS SANITARY DISTRICT BOARD FOUNTAIN HILLS TOWN COUNCIL Mayor Ginny Dickey Vice Mayor Alan Magazine Councilmember Gerry Friedel Councilmember Sharron Grzybowski Councilmember Peggy McMahon Councilmember Mike Scharnow Councilmember David Spelich FOUNTAIN HILLS Chairman SANITARY DISTRICT BOARD Michael Maroon Vice Chairman Bob Thomson Board Member Jerry Butler Board Member Tammy Bell Board Member Gregg Dudash TIME:5:30 P.M. – JOINT WORK SESSION WHEN:TUESDAY, OCTOBER 12, 2021 WHERE: FOUNTAIN HILLS COUNCIL CHAMBERS 16705 E. AVENUE OF THE FOUNTAINS, FOUNTAIN HILLS, AZ Councilmembers of the Town of Fountain Hills will attend either in person or by telephone conference call; a quorum of the Town’s various Commission, Committee or Board members may be in attendance at the Council meeting. Notice is hereby given that pursuant to A.R.S. §1-602.A.9, subject to certain specified statutory exceptions, parents have a right to consent before the State or any of its political subdivisions make a video or audio recording of a minor child. Meetings of the Town Council are audio and/or video recorded and, as a result, proceedings in which children are present may be subject to such recording. Parents, in order to exercise their rights may either file written consent with the Town Clerk to such recording, or take personal action to ensure that their child or children are not present when a recording may be made. If a child is present at the time a recording is made, the Town will assume that the rights afforded parents pursuant to A.R.S. §1-602.A.9 have been waived. The public is welcome to attend Work Sessions, but no public comment is taken. 1.CALL TO ORDER AND PLEDGE OF ALLEGIANCE – Mayor Dickey 2.ROLL CALL – Mayor Dickey 3.DISCUSSION regarding Value of Intergovernmental Agreement between Town of Fountain Hills and Fountain Hills Sanitary District. 4.DISCUSSION regarding joint District-Council working group to develop strategies to reduce sodium pollution. 5.DISCUSSION regarding Well 1 control building location and improvements at Fountain Park. 6.DISCUSSION regarding proposed Fountain Lake improvement projects and future timing. 7.DISCUSSION regarding coordination of wash maintenance in areas of District utility easements. 8.ADJOURNMENT CERTIFICATE OF POSTING OF NOTICE The undersigned hereby certifies that a copy of the foregoing notice was duly posted in accordance with the statement filed by the Town Council with the Town Clerk. Dated this ______ day of ____________________, 2021. _____________________________________________ Elizabeth A. Klein, MMC, Town Clerk The Town of Fountain Hills endeavors to make all public meetings accessible to persons with disabilities. Please call 480-816-5199 (voice) or 1-800-367-8939 (TDD) 48 hours prior to the meeting to request a reasonable accommodation to participate in the meeting or to obtain agenda information in large print format. Supporting documentation and staff reports furnished the Council with this agenda are available for review in the Clerk's Office. Joint Work Session of October 12, 2021 2 of 2 ITEM 3. TOWN OF FOUNTAIN HILLS STAFF REPORT Meeting Date: 10/12/2021 Meeting Type: Joint Work Session w/FH Sanitary District Board Agenda Type: Council Discussion Submitting Department: Administration Prepared by: Elizabeth A. Klein, Town Clerk Staff Contact Information: Grady E. Miller, Town Manager SPECIAL PUBLIC APPEARANCES/PRESENTATIONS (Agenda Language): DISCUSSION regarding Value of Intergovernmental Agreement between Town of Fountain Hills and Fountain Hills Sanitary District. Staff Summary (Background) A copy of the Intergovernmental Agreement between the Town and Fountain Hills Sanitary District is attached for reference during discussion of Item 3 of the Joint Work Session of October 12, 2021. Attachments Intergovernmental Agreement Form Review Inbox Reviewed By Date Finance Director David Pock 10/05/2021 09:40 AM Town Attorney Aaron D. Arnson 10/05/2021 11:43 AM Town Manager Grady E. Miller 10/05/2021 11:51 AM Form Started By: Elizabeth A. Klein Started On: 10/05/2021 09:12 AM Final Approval Date: 10/05/2021 ITEM 6. TOWN OF FOUNTAIN HILLS STAFF REPORT Meeting Date: 10/12/2021 Meeting Type: Joint Work Session w/FH Sanitary District Board Agenda Type: Council Discussion Submitting Department: Administration Prepared by: Elizabeth A. Klein, Town Clerk Staff Contact Information: Grady E. Miller, Town Manager SPECIAL PUBLIC APPEARANCES/PRESENTATIONS (Agenda Language): DISCUSSION regarding proposed Fountain Lake improvement projects and future timing. Staff Summary (Background) The attached PowerPoint presentation will be discussed during Item 6 of the Joint Work Session. Attachments PowerPoint Form Review Inbox Reviewed By Date Finance Director David Pock 10/05/2021 09:40 AM Town Attorney Aaron D. Arnson 10/05/2021 11:45 AM Town Manager Grady E. Miller 10/05/2021 11:50 AM Form Started By: Elizabeth A. Klein Started On: 10/05/2021 09:07 AM Final Approval Date: 10/05/2021 www.fh.az.gov FOUNTAIN REHABILITATION STUDY TOWN COUNCIL PRESENTATION| MAY 11, 2021 www.fh.az.gov Agenda •Introduction •Black & Veatch Project Recap •Liner Replacement Decision Methodology / Logistics •Estimate of Probable Construction Cost •Conclusions •Council Feedback / Direction www.fh.az.gov 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 Irrigation Civil-Mechanical Electrical - I&C Likelihood of FailureConsequence of FailureCondition Assessment Scoring Recap www.fh.az.gov Project Recap Asset Evaluation Conclusions •Some equipment exceeds typical useful life but in good condition; extend life with additional specialized maintenance and testing •Immediate Recommendations: •Replace check valves (complete) •Repair pump house intake screen •Install arc flash labels on electrical equipment (complete) •Upgrade to PLC control www.fh.az.gov LINER REPLACEMENT DECISION METHODOLOGY / LOGISTICS www.fh.az.gov Liner Replacement Decision Methodology Fountain liner in good shape •Continued Periodic Evaluation … but what if ... •Known (potential) damage event •Future evaluation results show concern … need means of making logical decisions www.fh.az.gov Liner Replacement Decision Methodology: Short Term Can stay “above the line” for foreseeable future … www.fh.az.gov Liner Replacement Decision Methodology: Known Event www.fh.az.gov Lake Water Management: Known Event Sectional Dewatering Cofferdam •Size depends on severity of the damage Solution: Inflatable cofferdam Avoids other issuesPhoto credit: hydrologicalsolutions.com www.fh.az.gov Liner Replacement Decision Methodology: Deterioration www.fh.az.gov Future Liner Replacement Logistics Main issues for consideration: 1.Disposal of Fountain Lake Water 2.Removal of Aquatic Life 3.Disposal of Fountain Lake Sludge 4.Surrounding Vegetation Maintenance www.fh.az.gov Issue 1: Disposal of Fountain Lake Water Options reviewed: 1.1 Multi-stage liner replacement 1.2 Aquifer recharge of the water 1.3 Direct reuse for irrigation www.fh.az.gov 1.1 -Disposal of Fountain Lake Water Multi-Stage Liner Replacement Approach •Use cofferdams to divide the lake into sections •Dewater, relocate aquatic life, remove sludge, & reline single section •Re -introduce water, move the cofferdam(s), repeat •Inflatable cofferdam(s) www.fh.az.gov 1.1 -Disposal of Fountain Lake Water Multi-Stage Liner Replacement Advantages •Reduced volume of water to manage •Minimal management of aquatic life required •Independent of other entities (no permitting) Disadvantages •High purchase cost of inflatable dam sections •Number of reinstallations of dam segments unknown •Longer construction schedule www.fh.az.gov 1.2 -Disposal of Fountain Lake Water Aquifer Recharge Approach •Install recharge well •Lease pumping and skid-mounted treatment equipment •Pretreatment Filtration •Microfiltration Membrane •UV Disinfection •Full draw down of lake www.fh.az.gov 1.2 -Disposal of Fountain Lake Water Aquifer Recharge Advantages •Minimize construction schedule •Independent of other entities Disadvantages •Very high cost of well and equipment •Possible impacts to other wells •More technical and permitting challenges www.fh.az.gov 1.2 -Disposal of Fountain Lake Water Aquifer Recharge Why not let FHSD treat and recharge? •Minimal excess treatment capacity •Poor quality lake water requires additional pretreatment •Prefer to not recharge higher TDS lake water to their wells www.fh.az.gov 1.3 -Disposal of Fountain Lake Water Direct Reuse Approach •Lease pumping and treatment equipment (filtration skid) •Pump into ASR well recovery piping •Deliver blended AWT/Lake water to reusers •Full draw down of lake Photo credit: Aqua-Aerobic Systems, Inc. www.fh.az.gov 1.3 -Disposal of Fountain Lake Water Direct Reuse Blending AWT and Lake Water Lake TDS: 2,600 ppm AWT TDS: 1,180 ppm Two disposal scenarios evaluated: •Two-month duration •Three-month duration www.fh.az.gov 1.3 -Disposal of Fountain Lake Water Direct Reuse Two Month Duration •Average delivered TDS: 1,980 ppm Three Month Duration •Average delivered TDS: 1,690 ppm 2,000 ppm threshold for turf irrigation health www.fh.az.gov Issue 2: Management of Aquatic Life Regulatory concerns: •Public body of water •Invasive species Three management options: 2.1 Relocation (other municipal / private lakes) 2.2 Rescue (specialized species) 2.3 Euthanization (Invasive / Non-Native Species) www.fh.az.gov 2 -Management of Aquatic Life Regulatory Concerns Administrative Code •Considers capture and transport of species a violation •Defines restricted species invasive or endangered Solution: Coordination with AZGFD Area Manager Photo credit: azgfd.com www.fh.az.gov 2 -Management of Aquatic Life Regulatory Concerns AzG&FD Area Manager •May allow some flexibility regarding requirements •Sampling and identification of species at a minimum www.fh.az.gov 2 -Management of Aquatic Life Management Options Combination of all options may be necessary 2.1 Relocation 2.2 Rescue 2.3 Euthanization/Destruction Public to private transfer may have the least regulatory hurdles Temporary modification to Fountain Lake fishing ordinance www.fh.az.gov 3 -Disposal of Fountain Lake Sludge Approach •Pump liquid sludge from lake •Lease dewatering equipment •Haul dewatered sludge for landfill disposal Photo credit: msdenvironmental.com www.fh.az.gov 3 -Disposal of Fountain Lake Sludge Advantages •Relatively rapid removal of sludge to minimize odors and insects Solar evaporation not considered due to extended duration, odors & insects www.fh.az.gov 4 -Vegetation Maintenance Desire to maintain surrounding lake vegetation during liner replacement. Options 4.1 Maintain use of existing source (cofferdam) 4.2 New dedicated irrigation reservoir and pump station www.fh.az.gov 4.1 -Vegetation Maintenance Existing Lake Source Approach •Cofferdam isolating Pump House cove •Manage raw water delivery and pumping to maintain level www.fh.az.gov 4.2 -Vegetation Maintenance Dedicated Irrigation Reservoir/Pump Station Approach •Construct 500,000 gallon reservoir and new irrigation feed pumps •Source no longer connected to lake www.fh.az.gov 4.2 -Vegetation Maintenance Dedicated Irrigation Reservoir/Pump Station Other considerations •If removing irrigation draw, lake becomes a dead-end •Ever increasing TDS (dissolved solids) •Increased toxicity to aquatic life Solution: Pump lake to sanitary sewer at an equivalent rate (113gpm) to “turn over” the lake FHSD sewer line capacity coordination and low-flow periods www.fh.az.gov ESTIMATES OF PROBABLE CONSTRUCTION COST www.fh.az.gov Estimates of Probable Cost Lake Dewatering Options ONLY Task Option Estimated 2020 Cost Range Projected 2030 Cost Range Cofferdam Option $2,310,000 -$2,960,000 $3,420,000 –$4,380,000 Recharge Option $2,690,000 -$3,440,000 $3,980,000 -$5,090,000 Reuse Option $1,450,000 -$1,850,000 $2,150,000 -$2,740,000 Includes: •Aquatic life management •Sludge management and disposal •Cofferdam approach for vegetation maintenance Does Not Include: •Liner replacement www.fh.az.gov Estimates of Probable Cost Liner Replacement Assumes: •Replacement Bid in 2000 = $1.3 M •4% escalation rate Task Estimated 2020 Cost Projected 2030 Cost Liner Replacement $2,660,000 -$2,940,000 $3,990,000 -$4,410,000 www.fh.az.gov Estimates of Probable Cost Total Relining Project Costs Including: •Engineering •Construction Management •Town Contingency Task Option Estimated 2020 Cost Range Projected 2030 Cost Range Cofferdam + Relining + Engr/CM $5,930,000 -$7,020,000 $8,830,000 -$10,460,000 Recharge + Relining + Engr/CM $6,380,000 -$7,600,000 $9,520,000 -$11,320,000 Reuse + Relining + Engr/CM $4,880,000 -$5,700,000 $7,300,000 -$8,510,000 www.fh.az.gov Estimates of Probable Cost Dedicated Irrigation Reservoir / Pump Station Includes/Assumes: •1,500 gpm pump station per irrigation assessment •Subgrade reservoir located on Town property (no land purchase included) •Exterior CMU wall around pump station on top of reservoir Task Estimated 2020 Cost Projected 2030 Cost Reservoir/Pump Station $1,120,000 –$1,430,000 $1,660,000 –$2,120,000 www.fh.az.gov CONCLUSIONS www.fh.az.gov Conclusions •Use Decision Tree for liner replacement timing •Localized repair if liner damaged by known event •Plan for multi-faceted lake water reuse strategy •Additional coordination will be required (FHSD, ADEQ, etc.) •Re-users (golf course management) to understand temporary water quality impacts / aquatic life transfer •AZGFD Area Manager for aquatic life management / transfer details •Bring contractor into planning process as early as possible Photo credit: Mike Caruso www.fh.az.gov COUNCIL FEEDBACK / DIRECTION