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Home My WebLink About2022-01-27 Council Work Session Agenda PacketCouncil Work Session Agenda January 27, 2022 – 6:00 pm 1. Call to Order / Roll Call 2. Water Supply Planning 3. Unscheduled Items 4. Adjournment *Includes Materials - Materials relating to these agenda items can be found in the house agenda packet book located by the Council Chambers entrance, or online at the City’s website at www.corcoranmn.gov. HYBRID MEETING OPTION AVAILABLE The public is invited to attend the regular Council meetings at City Hall. Meeting Via Telephone/Other Electronic Means Call-in Instructions: +1 312 626 6799 US Enter Meeting ID: 831 8403 1912 Press *9 to speak during the Public Comment Sections in the meeting. Video Link and Instructions: https://us02web.zoom.us/j/83184031912 visit http://www.zoom.us and enter Meeting ID: 831 8403 1912 Participants can utilize the Raise Hand function to be recognized to speak during the Public Comment sections in the meeting. Participant video feeds will be muted. In-person comments will be received first, with the hybrid electronic means option following. For more information on options to provide public comment visit: www.corcoranmn.gov City of Corcoran Water Supply, Treatment & Storage Project Council Work Session #3 Revised Agenda Item: 2. Agenda Status Updates Design Decisions • WTP Capacity, Sizing • Treatment Processes • Disinfection Chemicals • Water Tower Volume Budget Update • Scope, Options • User Rate, Area Rate Impacts Project Lookahead, Schedule Status Updates • Water Tower Site, Trunk Main ◦Right of Entries Secured ◦Soil Borings – Early February • Geotechnical Report ◦Pending design input for WTP • Public Works Engagement ◦Design Meeting #1 – January 6, 2022 ◦WTP Tours – January 13, 2022 – Chaska – Liquid Chlorine – IGH – Gas Chlorine • WTP Layout ◦Building Footprint and Concept Layouts Complete ◦Site Concept Layout Complete Status Update Design Decisions Design Decisions – Council Input January 27th Meeting GOALS: • Present Items for Council Consideration • Collect questions, follow up Items February/March Meeting (Date, TBD) GOALS: • Address Council Questions • Provide Budget Update • Receive Council Decisions to Inform Final Design Decision #1 - Capacity • Initial Construction • Serves NE portion of the NE MUSA – “The BOX” • Estimated Max Day Demand = 1.44 MGD (original) • Future Build Out • Serves Entire NE MUSA • Estimated Max Day Demand = 6 MGD • Considerations/Discussion • How to phase expansions? • What are the interim steps? ◦Projected Demand in 2040 ◦Opportunities for Industrial Users KEY GOAL: FLEXIBILITY, EXPANDABILITY! Land Use Guidance • Initial Construction • “The BOX” = 1.44 MGD • Future Build Out • Entire MUSA = 6 MGD *Note: The “Shoe” area is included in NE MUSA due to land elevation and pressure zone compared to SE Corcoran Size & Number of Filter Cells Decision #2 - Treatment Processes • Water Quality Data – WQ determines the volume of chemicals needed • Aeration Tower – Aeration is an option for oxidizing iron. Chlorine or Permanganate are chemical options. • Chemicals – Chlorine, Fluoride, Orthophosphate and potentially a form of permanganate are anticipated • Filtration – Gravity filters with underdrains and wash troughs Forced Draft Aerator w/ Chlorine Addition This proposed option increases capital cost, but reduces chemical usage and cost over time! Decision #3 - Disinfection Chemical CHLORINE GAS vs. SODIUM HYPOCHLORITE (LIQUID) Considerations 1. Safety 2. Treatment Effectiveness, Consistency 3. Cost Disinfection Chemicals CHLORINE GAS Pros 1. Physically compact • 150lb or 2000lb cylinders 2. Precise metering/dosing 3. Consistent disinfecting strength • Does not degrade over time 4. Inexpensive Cons 1. Greater hazard to human health 2. More complex Risk Assessment Planning 3. More expensive safety options Disinfection Chemicals SODIUM HYPOCHLORITE Pros 1. Safer Storage 2. Lower capital cost for implementation 3. Option to self-generate sodium hypochlorite on site (with investment into equipment) Cons 1. Larger physical presence tanks/ pumps 2. Higher cost per equivalent volume dosage 3. Disinfecting strength decreases over time Disinfection Chemicals – Cost Comparison Chlorine Gas Chemical Cost Unit Cost $1/lb Chlorine required (per system) 15 lb/day Cost per system per day $15/day Cost per system per year $5,475/year Electrical Electrical Cost Unit Cost $0.0683/kWh Electricity required per pump 72 kWh/day Cost per system per day $4.92/day Cost per system per year $1,795/year Total Cost Total estimated cost for all systems $43,620 per year Sodium Hypochlorite Chemical Cost Unit Cost $3/gal Chlorine required per system 15 gal/day Cost per system per day $45/day Cost per system per year $16,425/year Total estimated cost for all systems $98,550 per year Assumptions: • Dose Rate: 1 ppm chlorine • Cost : • Sodium hypochlorite, 12% cost of $3.00 per gallon • $2.00 per lb for gas • Flow rate 1000 gpm round up to 15 gal/day sodium hypo. and 15 lb/day for gas Decision #4 – Water Tower Volume Clear Well Storage (WTP) vs. Tower Volume • Original scope = 750k Gal Tower + 250k Gal Clearwell • Alternative = 1MG Tower + Limited Clearwell Storage Considerations: • Construction Cost ◦Marginal cost increase for additional volume ◦Significant cost for 2nd tower • Operational Flexibility ◦“All the eggs in one basket” ◦Maintenance cycle of tower = 20 years • Future Storage Needs, Long Term Planning ◦Ultimate build out of NE MUSA would require 2.3 MG of Storage (Towers + Clearwell) – 2 Towers @ 1 MG each – 3 Towers @ 750k Gal each Budget Update Project Scope, Budget Impacts • Water Tower • Location – land cost, additional watermain length • Volume – 750k Gal vs. 1 MG • Type – Composite vs. Pedestal • Water Treatment Plant • 2 vs. 3 Filter Cells • Architectural Finishes • “Wish List Items” – Storage, etc. • Well • No Changes to Date Budget Update to be Provided at End of Preliminary Design User Rate vs. Area Rate Analysis - City • Kevin to discuss overall budget relative to impacts on user rates vs. area rates Project Lookahead, Schedule Project Lookahead, Schedule • Water Tower • Church site soil borings • Further cost evaluation for volume, type discussion • Water Treatment Plant • Respond to questions on Design Decisions • Develop vertical layout of concept plan & architectural concepts • Prepare preliminary cost estimate for 2 vs. 3 cell layout • Meet with Fire Marshal, City Planner for preliminary review • Well • Revisit Construction Plans, Specs • Verify MDH Approval • Bidding Approval March 2022 • Construction Spring/Summer 2022 WETWETWET WET WET WETWETWETWETWETWETWETWETWETWET WETWETWETWETN=224578.12 E=457814.70 SB-16 SB-17 N=224578.12 E=457750.70 OSWALD FARM ROAD SHEET NUMBER DATENO SURVEY APPROVED DESIGNED DRAWN PROJ. NO.WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISIONI HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORTAND THAT I AM A DULY LICENSEDUNDER THE LAWS OF THE STATE OF PRINT NAME: SIGNATURE:DATE:LIC. NO.REVISION CHECKED Plot Date: 01/12/2022 - 4:58pmDrawing name: U:\227704426\CAD\Dwg\Sheets\227704426_Soil Boring.dwgXrefs:, 227704426_XSXT, 227704426_PARCELS, 227704426_WETLANDS-GIS, 227704426_BORDER, 227704426_XSNO, 227704426_XSNV, Utility - BW VanTHE CONTRACTOR SHALL VERIFY AND BE RESPONSIBLE FOR ALL DIMENSIONS. DO NOT SCALE THEDRAWING - ANY ERRORS OR OMISSIONS SHALL BE REPORTED TO STANTEC WITHOUT DELAY.THE COPYRIGHTS TO ALL DESIGNS AND DRAWINGS ARE THE PROPERTY OF STANTEC. REPRODUCTIONOR USE FOR ANY PURPOSE OTHER THAN THAT AUTHORIZED BY STANTEC IS FORBIDDEN.CITY OF CORCORAN, MNWATER TREATMENT PLANT227704426733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comXX XX, XXXXX X 4/4 SOIL BORINGSPROFESSIONAL ENGINEERMINNESOTA0 40 80 N PROPOSED ELEVATED TANK LOT 1 S1°07'46"W 761.35N89°58'44"W 362.55N1°09'23"E 16 >>>>>> > > > > > > > >>>>>>>>>>>>>>>>>>>l l l l l l l ll l l l ll l l l l l l l l l l l l l l l lllllll l l l l l l l l l l l ll l l l l l l l l l l l l l l l l lllllll>>>SMH-2 SMH-3 SMH-4 SMH-5 PROPOSED PERMANENT EASEMENT PROPOSED TEMPORARY EASEMENT 60.0030.00PULTE HOMES OF MINNESOTA D & V ANDERSON 19710 HUNTERS RIDGE STEVEN & SUSAN EHRESMANN 19750 HUNGERS RIDGE DAVID & DEBRA THOMPSON 19780 HUNTERS RIDGE PID 1211923220009 PROPOSED WATERMAIN PROPOSED SANITARY SEWER PROPOSED WATERMAIN E - 459307.52 N - 226225.67 E - 459307.52 N - 226225.67 E - 459307.52 N - 226225.67 E - 459307.52 N - 226225.67 SB-12 SB-13 SB-14 SB-15 SSWR_WTR_WTR ALIGNMENT -STA - (17+23.55 900 910 920 930 940 950 960 215'-30" PVC @ 0.07% 361'-30" PVC @ 0.06% 492'-30" PVC @ 0.06% 369'-30" PVC @ 0.06%SMH-2STA 0+62RIM 925.40INV 904.10 30" ESMH-3STA 2+77RIM 924.09INV 903.95 30" WINV 903.95 30" ESMH-4STA 6+38RIM 919.47INV 903.75 30" WINV 903.75 30" ESMH-5STA 11+30RIM 919.00INV 903.45 30" WINV 903.45 30" NESHEET NUMBER DATENO SURVEY APPROVED DESIGNED DRAWN PROJ. NO.WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISIONI HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORTAND THAT I AM A DULY LICENSEDUNDER THE LAWS OF THE STATE OF PRINT NAME: SIGNATURE:DATE:LIC. NO.REVISION CHECKED Plot Date: 01/12/2022 - 4:51pmDrawing name: U:\227704426\CAD\Dwg\Water Tower Site\Xrefs\227704426_XSSS_TOWER.dwgXrefs:, 227704426_XSXT, Utility - BW Van, ALTA 72905-313-700, grading - bw van, 227704426_XSNO, 227704426_PARCELS, 227704426_BORDERTHE CONTRACTOR SHALL VERIFY AND BE RESPONSIBLE FOR ALL DIMENSIONS. DO NOT SCALE THEDRAWING - ANY ERRORS OR OMISSIONS SHALL BE REPORTED TO STANTEC WITHOUT DELAY.THE COPYRIGHTS TO ALL DESIGNS AND DRAWINGS ARE THE PROPERTY OF STANTEC. REPRODUCTIONOR USE FOR ANY PURPOSE OTHER THAN THAT AUTHORIZED BY STANTEC IS FORBIDDEN.CITY OF CORCORAN, MNWATER TREATMENT PLANT227704426733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comXX XX, XXXXX X 3/4 $QRND &RXQW\ +HQQHSLQ &RXQW\ :ULJKW &RXQW\ ˘ˇ ˘ ˘ 'LVFODLPHU˛7KLVGRFXPHQWKDVEHHQSUHSDUHGEDVHGRQLQIRUPDWLRQSURYLGHGE\RWKHUVDVFLWHGLQWKH1RWHVVHFWLRQ6WDQWHFKDV RURPLVVLRQVZKLFKPD\EHLQFRUSRUDWHGKHUHLQDVDUHVXOW6WDQWHFDVVXPHVQRUHVSRQVLELOLW\IRUGDWDVXSSOLHGLQHOHFWURQLFI &OLHQW3URMHFW )LJXUH1R 3URMHFW/RFDWLRQ 7LWOH k 9˛?ˆˆ?DFWLYH?ˆˆ?BGDWD?JLVBFDG?JLV?SUR?EXLOGDEOHBDFUHV?EXLOGDEOHBDFUHVDSU[5HYLVHG˛ˇ%\˛MVKXFN/HJHQG ,QLWLDO3ODQQLQJ6WDJH %RXQGDU\ 8OWLPDWH6\VWHP%RXQGDU\ ZLWKLQ086$ 0XQLFLSDO%RXQGDU\ 086$ 6HZHU6XEGLVWULFWV :DWHU'LVWULFWV 3DUFHOV 8QEXLOGDEOH )XWXUH/DQG8VH 5XUDO$J5HVLGHQWLDO ([LVWLQJ5HVLGHQWLDO /RZ'HQVLW\5HVLGHQWLDO 0HGLXP'HQVLW\ 5HVLGHQWLDO 0L[HG5HVLGHQWLDO +LJK'HQVLW\5HVLGHQWLDO 5XUDO6HUYLFH&RPPHUFLDO &RPPHUFLDO 0L[HG8VH %XVLQHVV3DUN /LJKW,QGXVWULDO 3XEOLF6HPL3XEOLF 3DUNV2SHQ6SDFH $JULFXOWXUDO3UHVHUYH 'DWHRI([SLUDWLRQ 2SHQ:DWHU 3DJHRI 1RWHV &RRUGLQDWH6\VWHP˛1$'˝˙+$51$GM01 +HQQHSLQ)HHW 'DWD6RXUFHV˛+HQQHSLQ&RXQW\01'15 %DFNJURXQG˛(65,:RUOG6WUHHPDS $WRULJLQDOGRFXPHQWVL]HRI˙˘[ ˛ ˇ )HHW 3UHSDUHGE\-&6RQˇ 75E\;;;RQ;;;; ,5E\;;;RQ;;;; &RUFRUDQ+HQQHSLQ&R01 ˆˆ &LW\RI&RUFRUDQ %XLOGDEOH$FUHV$QDO\VLV 1(:DWHU6\VWHP FIELD ENTRANCE ACCESS POINT APPROXIMATE LOCATION OF SEPTIC TANKS AND DRAIN FIELD60.00BUILDING SET BACK40.00 PARKING SET BACK PROPOSED BUILDING PRODUCTION WELL STORMWATER PONDING AREA 923922921924 9259269279289299309319349 3 2 93 0 9 2 8 9 2 6 9 3 6 9 3 8 9 4 0 925 926 927 928COUNTY ROAD NO. 116N89°58'44"W 362.55N1°09'23"E 161.92N89°59'50"W 320.83 WETWETWETWET WETWETWETWETWETWETWETWETWETWETWETWETWET3.4 AC RAW LAND 1.9 AC WITHIN SETBACKS >>>>>>>>>>>>>>>>>>>>> > > > > > > > > > > > >>>>>>>>5 5 . 0 0 55' WELL BUFFER FUTURE BUILDING EXPANSION 30.00FUTURE ROADWAY CONNECTION (EXACT LOCATION UNKNOWN)24.0018.00 20.009.00 24.00 48.0024.00 HAMMERHEAD TURNAROUND SHEET NUMBER DATENO SURVEY APPROVED DESIGNED DRAWN PROJ. NO.WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISIONI HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORTAND THAT I AM A DULY LICENSEDUNDER THE LAWS OF THE STATE OF PRINT NAME: SIGNATURE:DATE:LIC. NO.REVISION CHECKED Plot Date: 01/20/2022 - 10:28amDrawing name: Z:\227704426\CAD\Dwg\Sheets\227704426_C101.dwgXrefs:, 227704426_XSXT, 227704426_PARCELS, 227704426_WETLANDS-GIS, 227704426_BORDER, 227704426_XSNO, 227704426_XSNV, Utility - BW VanTHE CONTRACTOR SHALL VERIFY AND BE RESPONSIBLE FOR ALL DIMENSIONS. DO NOT SCALE THEDRAWING - ANY ERRORS OR OMISSIONS SHALL BE REPORTED TO STANTEC WITHOUT DELAY.THE COPYRIGHTS TO ALL DESIGNS AND DRAWINGS ARE THE PROPERTY OF STANTEC. REPRODUCTIONOR USE FOR ANY PURPOSE OTHER THAN THAT AUTHORIZED BY STANTEC IS FORBIDDEN.CITY OF CORCORAN, MNWATER TREATMENT PLANT227704426733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comXX XX, XXXXX X C-101 CONCEPT SITE PLAN PROFESSIONAL ENGINEERMINNESOTA0 30 60 N COUNTY ROAD NO. 116N89°58'44"W 362.55N1°09'23"E 161.92N89°59'50"W 320.83 WETWETWETWET WETWETWETWETWETWETWETWETWETWETWETWETWET3.4 AC RAW LAND 1.9 AC WITHIN SETBACKS >>>>>>>>>>>>>>>>>>>>> > > > > > > > > > > > >>>>>>>>APPROXIMATE LOCATION OF SEPTIC TANKS AND DRAIN FIELD STORMWATER PONDING AREA 923922921924 9259269279289299309319349 3 2 93 0 9 2 8 9 2 6 9 3 6 9 3 8 9 4 0 926 927 928 925 921 922 92 3 92 4 92 6 92 7 9 2 8 92992592292392493092 7 9 2 7 928929930929929 929 9289259269279 2 7 927 921923 926 9 2 8 930929931930931932930 927 PROPOSED BUILDING FFE: 930.00 3.75%1.70% 2.84%1.24% 2 . 4 7%1.71%1.45%2.05%1.70%2.99%4.03%3.60%20.0%20.0%20.4% 20.2% 20.0%20.0%20.0% 20.0%1.44%3.55%1.59%1.53%2.48%20.02%20.02%20.00%19.7% SHEET NUMBER DATENO SURVEY APPROVED DESIGNED DRAWN PROJ. NO.WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISIONI HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORTAND THAT I AM A DULY LICENSEDUNDER THE LAWS OF THE STATE OF PRINT NAME: SIGNATURE:DATE:LIC. NO.REVISION CHECKED Plot Date: 01/20/2022 - 10:23amDrawing name: Z:\227704426\CAD\Dwg\Sheets\227704426_C301.dwgXrefs:, 227704426_XSXT, 227704426_PARCELS, 227704426_WETLANDS-GIS, 227704426_BORDER, 227704426_XSNO, 227704426_XSNV, Utility - BW VanTHE CONTRACTOR SHALL VERIFY AND BE RESPONSIBLE FOR ALL DIMENSIONS. DO NOT SCALE THEDRAWING - ANY ERRORS OR OMISSIONS SHALL BE REPORTED TO STANTEC WITHOUT DELAY.THE COPYRIGHTS TO ALL DESIGNS AND DRAWINGS ARE THE PROPERTY OF STANTEC. REPRODUCTIONOR USE FOR ANY PURPOSE OTHER THAN THAT AUTHORIZED BY STANTEC IS FORBIDDEN.CITY OF CORCORAN, MNWATER TREATMENT PLANT227704426733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comXX XX, XXXXX X C-301 CONCEPT GRADING PLAN PROFESSIONAL ENGINEERMINNESOTA0 30 60 N 80'-0"74'-4"8'-0"8"6'-0"8"6'-0"8"CONTROL ROOM101PIPE GALLERYACCESS110CHLORINE ROOM108POLYPHOSPHATE107FLUORIDE106CHEMICAL105RESTROOM103ENTRY102PUMP ROOM1135'-0"1'-0"2'-0"8"20'-0"1'-0"6'-8"1'-0"17'-8"36'-0"20'-0"1'-0"20'-0"38'-4"ELECTRICAL ROOM111HALLWAY104DETENTION109DETENTION TANK001FILTER 1004FILTER 2005GULLET 2007GULLET 100611'-4"7'-4"6'-4"15'-4"15'-4"36'-4"17'-8"13'-0"8"1'-0"1'-0"8"2'-0"8"14'-0"8"6'-8"1'-0"10' - 0"MECHANICALROOM11237'-4"8"14'-0"4'-8"8"12'-4"FIGUREDATE733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comPROJ. NO.U:\227704426\CAD\Dwg\BIM\227704426_AS_TwoFilter_R20.rvtCITY OF CORCORAN, MNCORCORAN WATER TREATMENT PLAN227704426MAIN LEVEL CONCEPTUAL FLOOR PLAN102'-8"5'-4"10'-8"01/19/2022 UPBACKWASH TANK003FILTER 2005FILTER 1004GULLET 1006GULLET 2007DETENTION TANK001FLEX SPACE009CLEARWELL008PIPE GALLERY002PIPE GALLERY002LOWER LEVEL ACCESS, DEPEDENT ON SITE GRADING 27'-4"1'-0"2'-0"8"20'-0"1'-0"6'-8"1'-0"17'-8"41'-0"23'-8"1'-0"15'-4"36'-4"17'-8"12'-8"45'-0"1'-0"6'-0"1'-0"10'-0"FIGUREDATE733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comPROJ. NO.U:\227704426\CAD\Dwg\BIM\227704426_AS_TwoFilter_R20.rvtCITY OF CORCORAN, MNCORCORAN WATER TREATMENT PLAN227704426LOWER LEVEL CONCEPTUAL FLOOR PLAN201/19/202202'-8"5'-4"10'-8" 80'-0"95'-4"6'-0"8"6'-0"8"6'-0"8"CONTROL ROOM101PIPE GALLERYACCESS111CHLORINE ROOM109POLYPHOSPHATE108FLUORIDE107CHEMICAL106RESTROOM103ENTRY102PUMP ROOM1145'-0"1'-0"2'-0"8"20'-0"1'-0"6'-8"1'-0"17'-8"60'-4"20'-0"1'-0"20'-0"35'-0"ELECTRICAL ROOM112HALLWAY104DETENTION TANK001FILTER 1005FILTER 2006GULLET 2009GULLET 100817'-4"6'-4"15'-4"15'-4"36'-4"17'-8"15'-0"8"1'-0"1' - 0"8"8'-8"14'-0"8"6'-8"1'-0"10'-0"MECHANICALROOM11358'-4"8"14'-0"4'-8"8"12'-4"FILTER 30071'-0"20'-0"8"19'-8"STORAGE105BACKWASH WALL BELOWMOP SINKFDFDFDDETENTION110GULLET 3010FIGUREDATE733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comPROJ. NO.C:\Users\public\Documents\Local_Revit_Files\227704426_AS_R20_rmielke.rvtCITY OF CORCORAN, MNCORCORAN WATER TREATMENT PLAN227704426MAIN LEVEL CONCEPTUAL FLOOR PLAN102'-8"5'-4"10'-8"01/20/2022 UPWHBACKWASH TANK004FILTER 2006FILTER 1005GULLET 1008GULLET 2009DETENTION TANK001PIPE GALLERY002PIPE GALLERY00227' - 4"1' - 0"2' - 0"0' - 8"20' - 0"1' - 0"6' - 8"1' - 0"17' - 8"53' - 4"25' - 8"1' - 0"15' - 4"36' - 4"17' - 8"10'-0"FILTER 3007GULLET 3010CLEARWELL011MECH/STORAGE003MOP SINK1' - 0"7' - 8"FIGUREDATE733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comPROJ. NO.C:\Users\public\Documents\Local_Revit_Files\227704426_AS_R20_rmielke.rvtCITY OF CORCORAN, MNCORCORAN WATER TREATMENT PLAN227704426LOWER LEVEL CONCEPTUAL FLOOR PLAN201/20/202202'-8"5'-4"10'-8" City of Corcoran Water Supply, Treatment & Storage Project Council Work Session #3 Agenda Status Updates Design Decisions • WTP Capacity, Sizing • Treatment Processes • Disinfection Chemicals • Water Tower Volume Budget Update • Scope, Options • User Rate, Area Rate Impacts Project Lookahead, Schedule Status Updates • Water Tower Site, Trunk Main ◦Right of Entries Secured ◦Soil Borings – Early February • Geotechnical Report ◦Pending design input for WTP • Public Works Engagement ◦Design Meeting #1 – January 6, 2022 ◦WTP Tours – January 13, 2022 – Chaska – Liquid Chlorine – IGH – Gas Chlorine • WTP Layout ◦Building Footprint and Concept Layouts Complete ◦Site Concept Layout Complete Status Update Design Decisions Design Decisions – Council Input January 27th Meeting GOALS: • Present Items for Council Consideration • Collect questions, follow up Items February/March Meeting (Date, TBD) GOALS: • Address Council Questions • Provide Budget Update • Receive Council Decisions to Inform Final Design Decision #1 - Capacity • Initial Construction • Serves NE portion of the NE MUSA – “The BOX” • Estimated Max Day Demand = 1.44 MGD (original) • Future Build Out • Serves Entire NE MUSA • Estimated Max Day Demand = 6 MGD • Considerations/Discussion • How to phase expansions? • What are the interim steps? ◦Projected Demand in 2040 ◦Opportunities for Industrial Users KEY GOAL: FLEXIBILITY, EXPANDABILITY! Land Use Guidance • Initial Construction • “The BOX” = 1.44 MGD • Future Build Out • Entire MUSA = 6 MGD *Note: The “Shoe” area is included in NE MUSA due to land elevation and pressure zone compared to SE Corcoran Size & Number of Filter Cells Decision #2 - Treatment Processes • Water Quality Data – WQ determines the volume of chemicals needed • Aeration Tower – Aeration is an option for oxidizing iron. Chlorine or Permanganate are chemical options. • Chemicals – Chlorine, Fluoride, Orthophosphate and potentially a form of permanganate are anticipated • Filtration – Gravity filters with underdrains and wash troughs Forced Draft Aerator w/ Chlorine Addition This proposed option increases capital cost, but reduces chemical usage and cost over time! Decision #3 - Disinfection Chemical CHLORINE GAS vs. SODIUM HYPOCHLORITE (LIQUID) Considerations 1. Safety 2. Treatment Effectiveness, Consistency 3. Cost Disinfection Chemicals CHLORINE GAS Pros 1. Physically compact • 150lb or 2000lb cylinders 2. Precise metering/dosing 3. Consistent disinfecting strength • Does not degrade over time 4. Inexpensive Cons 1. Greater hazard to human health 2. More complex Risk Assessment Planning 3. More expensive safety options Disinfection Chemicals SODIUM HYPOCHLORITE Pros 1. Safer Storage 2. Lower capital cost for implementation 3. Option to self-generate sodium hypochlorite on site (with investment into equipment) Cons 1. Larger physical presence tanks/ pumps 2. Higher cost per equivalent volume dosage 3. Disinfecting strength decreases over time Disinfection Chemicals – Cost Comparison Chlorine Gas Chemical Cost Unit Cost $1/lb Chlorine required (per system) 15 lb/day Cost per system per day $15/day Cost per system per year $5,475/year Electrical Electrical Cost Unit Cost $0.0683/kWh Electricity required per pump 72 kWh/day Cost per system per day $4.92/day Cost per system per year $1,795/year Total Cost Total estimated cost for all systems $43,620 per year Sodium Hypochlorite Chemical Cost Unit Cost $3/gal Chlorine required per system 15 gal/day Cost per system per day $45/day Cost per system per year $16,425/year Total estimated cost for all systems $98,550 per year Assumptions: • Dose Rate: 1 ppm chlorine • Cost : • Sodium hypochlorite, 12% cost of $3.00 per gallon • $2.00 per lb for gas • Flow rate 1000 gpm round up to 15 gal/day sodium hypo. and 15 lb/day for gas Decision #4 – Water Tower Volume Clear Well Storage (WTP) vs. Tower Volume • Original scope = 750k Gal Tower + 250k Gal Clearwell • Alternative = 1MG Tower + Limited Clearwell Storage Considerations: • Construction Cost ◦Marginal cost increase for additional volume ◦Significant cost for 2nd tower • Operational Flexibility ◦“All the eggs in one basket” ◦Maintenance cycle of tower = 20 years • Future Storage Needs, Long Term Planning ◦Ultimate build out of NE MUSA would require 2.3 MG of Storage (Towers + Clearwell) – 2 Towers @ 1 MG each – 3 Towers @ 750k Gal each Budget Update Project Scope, Budget Impacts • Water Tower • Location – land cost, additional watermain length • Volume – 750k Gal vs. 1 MG • Type – Composite vs. Pedestal • Water Treatment Plant • 2 vs. 3 Filter Cells • Architectural Finishes • “Wish List Items” – Storage, etc. • Well • No Changes to Date Budget Update to be Provided at End of Preliminary Design User Rate vs. Area Rate Analysis - City • Kevin to discuss overall budget relative to impacts on user rates vs. area rates Project Lookahead, Schedule Project Lookahead, Schedule • Water Tower • Church site soil borings • Further cost evaluation for volume, type discussion • Water Treatment Plant • Respond to questions on Design Decisions • Develop vertical layout of concept plan & architectural concepts • Prepare preliminary cost estimate for 2 vs. 3 cell layout • Meet with Fire Marshal, City Planner for preliminary review • Well • Revisit Construction Plans, Specs • Verify MDH Approval • Bidding Approval March 2022 • Construction Spring/Summer 2022 WETWETWET WET WET WETWETWETWETWETWETWETWETWETWET WETWETWETWETN=224578.12 E=457814.70 SB-16 SB-17 N=224578.12 E=457750.70 OSWALD FARM ROAD SHEET NUMBER DATENO SURVEY APPROVED DESIGNED DRAWN PROJ. NO.WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISIONI HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORTAND THAT I AM A DULY LICENSEDUNDER THE LAWS OF THE STATE OF PRINT NAME: SIGNATURE:DATE:LIC. NO.REVISION CHECKED Plot Date: 01/12/2022 - 4:58pmDrawing name: U:\227704426\CAD\Dwg\Sheets\227704426_Soil Boring.dwgXrefs:, 227704426_XSXT, 227704426_PARCELS, 227704426_WETLANDS-GIS, 227704426_BORDER, 227704426_XSNO, 227704426_XSNV, Utility - BW VanTHE CONTRACTOR SHALL VERIFY AND BE RESPONSIBLE FOR ALL DIMENSIONS. DO NOT SCALE THEDRAWING - ANY ERRORS OR OMISSIONS SHALL BE REPORTED TO STANTEC WITHOUT DELAY.THE COPYRIGHTS TO ALL DESIGNS AND DRAWINGS ARE THE PROPERTY OF STANTEC. REPRODUCTIONOR USE FOR ANY PURPOSE OTHER THAN THAT AUTHORIZED BY STANTEC IS FORBIDDEN.CITY OF CORCORAN, MNWATER TREATMENT PLANT227704426733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comXX XX, XXXXX X 4/4 SOIL BORINGSPROFESSIONAL ENGINEERMINNESOTA0 40 80 N PROPOSED ELEVATED TANK LOT 1 S1°07'46"W 761.35N89°58'44"W 362.55N1°09'23"E 16 >>>>>> > > > > > > > >>>>>>>>>>>>>>>>>>>l l l l l l l ll l l l ll l l l l l l l l l l l l l l l lllllll l l l l l l l l l l l ll l l l l l l l l l l l l l l l l lllllll>>>SMH-2 SMH-3 SMH-4 SMH-5 PROPOSED PERMANENT EASEMENT PROPOSED TEMPORARY EASEMENT 60.0030.00PULTE HOMES OF MINNESOTA D & V ANDERSON 19710 HUNTERS RIDGE STEVEN & SUSAN EHRESMANN 19750 HUNGERS RIDGE DAVID & DEBRA THOMPSON 19780 HUNTERS RIDGE PID 1211923220009 PROPOSED WATERMAIN PROPOSED SANITARY SEWER PROPOSED WATERMAIN E - 459307.52 N - 226225.67 E - 459307.52 N - 226225.67 E - 459307.52 N - 226225.67 E - 459307.52 N - 226225.67 SB-12 SB-13 SB-14 SB-15 SSWR_WTR_WTR ALIGNMENT -STA - (17+23.55 900 910 920 930 940 950 960 215'-30" PVC @ 0.07% 361'-30" PVC @ 0.06% 492'-30" PVC @ 0.06% 369'-30" PVC @ 0.06%SMH-2STA 0+62RIM 925.40INV 904.10 30" ESMH-3STA 2+77RIM 924.09INV 903.95 30" WINV 903.95 30" ESMH-4STA 6+38RIM 919.47INV 903.75 30" WINV 903.75 30" ESMH-5STA 11+30RIM 919.00INV 903.45 30" WINV 903.45 30" NESHEET NUMBER DATENO SURVEY APPROVED DESIGNED DRAWN PROJ. NO.WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISIONI HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORTAND THAT I AM A DULY LICENSEDUNDER THE LAWS OF THE STATE OF PRINT NAME: SIGNATURE:DATE:LIC. NO.REVISION CHECKED Plot Date: 01/12/2022 - 4:51pmDrawing name: U:\227704426\CAD\Dwg\Water Tower Site\Xrefs\227704426_XSSS_TOWER.dwgXrefs:, 227704426_XSXT, Utility - BW Van, ALTA 72905-313-700, grading - bw van, 227704426_XSNO, 227704426_PARCELS, 227704426_BORDERTHE CONTRACTOR SHALL VERIFY AND BE RESPONSIBLE FOR ALL DIMENSIONS. DO NOT SCALE THEDRAWING - ANY ERRORS OR OMISSIONS SHALL BE REPORTED TO STANTEC WITHOUT DELAY.THE COPYRIGHTS TO ALL DESIGNS AND DRAWINGS ARE THE PROPERTY OF STANTEC. REPRODUCTIONOR USE FOR ANY PURPOSE OTHER THAN THAT AUTHORIZED BY STANTEC IS FORBIDDEN.CITY OF CORCORAN, MNWATER TREATMENT PLANT227704426733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comXX XX, XXXXX X 3/4 $QRND &RXQW\ +HQQHSLQ &RXQW\ :ULJKW &RXQW\ ˘ˇ ˘ ˘ 'LVFODLPHU˛7KLVGRFXPHQWKDVEHHQSUHSDUHGEDVHGRQLQIRUPDWLRQSURYLGHGE\RWKHUVDVFLWHGLQWKH1RWHVVHFWLRQ6WDQWHFKDV RURPLVVLRQVZKLFKPD\EHLQFRUSRUDWHGKHUHLQDVDUHVXOW6WDQWHFDVVXPHVQRUHVSRQVLELOLW\IRUGDWDVXSSOLHGLQHOHFWURQLFI &OLHQW3URMHFW )LJXUH1R 3URMHFW/RFDWLRQ 7LWOH k 9˛?ˆˆ?DFWLYH?ˆˆ?BGDWD?JLVBFDG?JLV?SUR?EXLOGDEOHBDFUHV?EXLOGDEOHBDFUHVDSU[5HYLVHG˛ˇ%\˛MVKXFN/HJHQG ,QLWLDO3ODQQLQJ6WDJH %RXQGDU\ 8OWLPDWH6\VWHP%RXQGDU\ ZLWKLQ086$ 0XQLFLSDO%RXQGDU\ 086$ 6HZHU6XEGLVWULFWV :DWHU'LVWULFWV 3DUFHOV 8QEXLOGDEOH )XWXUH/DQG8VH 5XUDO$J5HVLGHQWLDO ([LVWLQJ5HVLGHQWLDO /RZ'HQVLW\5HVLGHQWLDO 0HGLXP'HQVLW\ 5HVLGHQWLDO 0L[HG5HVLGHQWLDO +LJK'HQVLW\5HVLGHQWLDO 5XUDO6HUYLFH&RPPHUFLDO &RPPHUFLDO 0L[HG8VH %XVLQHVV3DUN /LJKW,QGXVWULDO 3XEOLF6HPL3XEOLF 3DUNV2SHQ6SDFH $JULFXOWXUDO3UHVHUYH 'DWHRI([SLUDWLRQ 2SHQ:DWHU 3DJHRI 1RWHV &RRUGLQDWH6\VWHP˛1$'˝˙+$51$GM01 +HQQHSLQ)HHW 'DWD6RXUFHV˛+HQQHSLQ&RXQW\01'15 %DFNJURXQG˛(65,:RUOG6WUHHPDS $WRULJLQDOGRFXPHQWVL]HRI˙˘[ ˛ ˇ )HHW 3UHSDUHGE\-&6RQˇ 75E\;;;RQ;;;; ,5E\;;;RQ;;;; &RUFRUDQ+HQQHSLQ&R01 ˆˆ &LW\RI&RUFRUDQ %XLOGDEOH$FUHV$QDO\VLV 1(:DWHU6\VWHP FIELD ENTRANCE ACCESS POINT APPROXIMATE LOCATION OF SEPTIC TANKS AND DRAIN FIELD60.00BUILDING SET BACK40.00 PARKING SET BACK PROPOSED BUILDING PRODUCTION WELL STORMWATER PONDING AREA 923922921924 9259269279289299309319349 3 2 93 0 9 2 8 9 2 6 9 3 6 9 3 8 9 4 0 925 926 927 928COUNTY ROAD NO. 116N89°58'44"W 362.55N1°09'23"E 161.92N89°59'50"W 320.83 WETWETWETWET WETWETWETWETWETWETWETWETWETWETWETWETWET3.4 AC RAW LAND 1.9 AC WITHIN SETBACKS >>>>>>>>>>>>>>>>>>>>> > > > > > > > > > > > >>>>>>>>5 5 . 0 0 55' WELL BUFFER FUTURE BUILDING EXPANSION 30.00FUTURE ROADWAY CONNECTION (EXACT LOCATION UNKNOWN)24.0018.00 20.009.00 24.00 48.0024.00 HAMMERHEAD TURNAROUND SHEET NUMBER DATENO SURVEY APPROVED DESIGNED DRAWN PROJ. NO.WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISIONI HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORTAND THAT I AM A DULY LICENSEDUNDER THE LAWS OF THE STATE OF PRINT NAME: SIGNATURE:DATE:LIC. NO.REVISION CHECKED Plot Date: 01/20/2022 - 10:28amDrawing name: Z:\227704426\CAD\Dwg\Sheets\227704426_C101.dwgXrefs:, 227704426_XSXT, 227704426_PARCELS, 227704426_WETLANDS-GIS, 227704426_BORDER, 227704426_XSNO, 227704426_XSNV, Utility - BW VanTHE CONTRACTOR SHALL VERIFY AND BE RESPONSIBLE FOR ALL DIMENSIONS. DO NOT SCALE THEDRAWING - ANY ERRORS OR OMISSIONS SHALL BE REPORTED TO STANTEC WITHOUT DELAY.THE COPYRIGHTS TO ALL DESIGNS AND DRAWINGS ARE THE PROPERTY OF STANTEC. REPRODUCTIONOR USE FOR ANY PURPOSE OTHER THAN THAT AUTHORIZED BY STANTEC IS FORBIDDEN.CITY OF CORCORAN, MNWATER TREATMENT PLANT227704426733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comXX XX, XXXXX X C-101 CONCEPT SITE PLAN PROFESSIONAL ENGINEERMINNESOTA0 30 60 N COUNTY ROAD NO. 116N89°58'44"W 362.55N1°09'23"E 161.92N89°59'50"W 320.83 WETWETWETWET WETWETWETWETWETWETWETWETWETWETWETWETWET3.4 AC RAW LAND 1.9 AC WITHIN SETBACKS >>>>>>>>>>>>>>>>>>>>> > > > > > > > > > > > >>>>>>>>APPROXIMATE LOCATION OF SEPTIC TANKS AND DRAIN FIELD STORMWATER PONDING AREA 923922921924 9259269279289299309319349 3 2 93 0 9 2 8 9 2 6 9 3 6 9 3 8 9 4 0 926 927 928 925 921 922 92 3 92 4 92 6 92 7 9 2 8 92992592292392493092 7 9 2 7 928929930929929 929 9289259269279 2 7 927 921923 926 9 2 8 930929931930931932930 927 PROPOSED BUILDING FFE: 930.00 3.75%1.70% 2.84%1.24% 2 . 4 7%1.71%1.45%2.05%1.70%2.99%4.03%3.60%20.0%20.0%20.4% 20.2% 20.0%20.0%20.0% 20.0%1.44%3.55%1.59%1.53%2.48%20.02%20.02%20.00%19.7% SHEET NUMBER DATENO SURVEY APPROVED DESIGNED DRAWN PROJ. NO.WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISIONI HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORTAND THAT I AM A DULY LICENSEDUNDER THE LAWS OF THE STATE OF PRINT NAME: SIGNATURE:DATE:LIC. NO.REVISION CHECKED Plot Date: 01/20/2022 - 10:23amDrawing name: Z:\227704426\CAD\Dwg\Sheets\227704426_C301.dwgXrefs:, 227704426_XSXT, 227704426_PARCELS, 227704426_WETLANDS-GIS, 227704426_BORDER, 227704426_XSNO, 227704426_XSNV, Utility - BW VanTHE CONTRACTOR SHALL VERIFY AND BE RESPONSIBLE FOR ALL DIMENSIONS. DO NOT SCALE THEDRAWING - ANY ERRORS OR OMISSIONS SHALL BE REPORTED TO STANTEC WITHOUT DELAY.THE COPYRIGHTS TO ALL DESIGNS AND DRAWINGS ARE THE PROPERTY OF STANTEC. REPRODUCTIONOR USE FOR ANY PURPOSE OTHER THAN THAT AUTHORIZED BY STANTEC IS FORBIDDEN.CITY OF CORCORAN, MNWATER TREATMENT PLANT227704426733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comXX XX, XXXXX X C-301 CONCEPT GRADING PLAN PROFESSIONAL ENGINEERMINNESOTA0 30 60 N 80'-0"74'-4"8'-0"8"6'-0"8"6'-0"8"CONTROL ROOM101PIPE GALLERYACCESS110CHLORINE ROOM108POLYPHOSPHATE107FLUORIDE106CHEMICAL105RESTROOM103ENTRY102PUMP ROOM1135'-0"1'-0"2'-0"8"20'-0"1'-0"6'-8"1'-0"17'-8"36'-0"20'-0"1'-0"20'-0"38'-4"ELECTRICAL ROOM111HALLWAY104DETENTION109DETENTION TANK001FILTER 1004FILTER 2005GULLET 2007GULLET 100611'-4"7'-4"6'-4"15'-4"15'-4"36'-4"17'-8"13'-0"8"1'-0"1'-0"8"2'-0"8"14'-0"8"6'-8"1'-0"10' - 0"MECHANICALROOM11237'-4"8"14'-0"4'-8"8"12'-4"FIGUREDATE733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comPROJ. NO.U:\227704426\CAD\Dwg\BIM\227704426_AS_TwoFilter_R20.rvtCITY OF CORCORAN, MNCORCORAN WATER TREATMENT PLAN227704426MAIN LEVEL CONCEPTUAL FLOOR PLAN102'-8"5'-4"10'-8"01/19/2022 UPBACKWASH TANK003FILTER 2005FILTER 1004GULLET 1006GULLET 2007DETENTION TANK001FLEX SPACE009CLEARWELL008PIPE GALLERY002PIPE GALLERY002LOWER LEVEL ACCESS, DEPEDENT ON SITE GRADING 27'-4"1'-0"2'-0"8"20'-0"1'-0"6'-8"1'-0"17'-8"41'-0"23'-8"1'-0"15'-4"36'-4"17'-8"12'-8"45'-0"1'-0"6'-0"1'-0"10'-0"FIGUREDATE733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comPROJ. NO.U:\227704426\CAD\Dwg\BIM\227704426_AS_TwoFilter_R20.rvtCITY OF CORCORAN, MNCORCORAN WATER TREATMENT PLAN227704426LOWER LEVEL CONCEPTUAL FLOOR PLAN201/19/202202'-8"5'-4"10'-8" 80'-0"95'-4"6'-0"8"6'-0"8"6'-0"8"CONTROL ROOM101PIPE GALLERYACCESS111CHLORINE ROOM109POLYPHOSPHATE108FLUORIDE107CHEMICAL106RESTROOM103ENTRY102PUMP ROOM1145'-0"1'-0"2'-0"8"20'-0"1'-0"6'-8"1'-0"17'-8"60'-4"20'-0"1'-0"20'-0"35'-0"ELECTRICAL ROOM112HALLWAY104DETENTION TANK001FILTER 1005FILTER 2006GULLET 2009GULLET 100817'-4"6'-4"15'-4"15'-4"36'-4"17'-8"15'-0"8"1'-0"1' - 0"8"8'-8"14'-0"8"6'-8"1'-0"10'-0"MECHANICALROOM11358'-4"8"14'-0"4'-8"8"12'-4"FILTER 30071'-0"20'-0"8"19'-8"STORAGE105BACKWASH WALL BELOWMOP SINKFDFDFDDETENTION110GULLET 3010FIGUREDATE733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comPROJ. NO.C:\Users\public\Documents\Local_Revit_Files\227704426_AS_R20_rmielke.rvtCITY OF CORCORAN, MNCORCORAN WATER TREATMENT PLAN227704426MAIN LEVEL CONCEPTUAL FLOOR PLAN102'-8"5'-4"10'-8"01/20/2022 UPWHBACKWASH TANK004FILTER 2006FILTER 1005GULLET 1008GULLET 2009DETENTION TANK001PIPE GALLERY002PIPE GALLERY00227' - 4"1' - 0"2' - 0"0' - 8"20' - 0"1' - 0"6' - 8"1' - 0"17' - 8"53' - 4"25' - 8"1' - 0"15' - 4"36' - 4"17' - 8"10'-0"FILTER 3007GULLET 3010CLEARWELL011MECH/STORAGE003MOP SINK1' - 0"7' - 8"FIGUREDATE733 Marquette Avenue, Suite 1000Minneapolis, MN 55402www.stantec.comPROJ. NO.C:\Users\public\Documents\Local_Revit_Files\227704426_AS_R20_rmielke.rvtCITY OF CORCORAN, MNCORCORAN WATER TREATMENT PLAN227704426LOWER LEVEL CONCEPTUAL FLOOR PLAN201/20/202202'-8"5'-4"10'-8"