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Home My WebLink About09.c EDB KH WRF Proposal EXECUTIVE SUMMARY AGENDA ITEM: Disclosure of Unsolicited Proposal for Design and Construction of New Water Reclamation Facility (WRF) in Keystone Heights Job Number: 2210-022 Financial Job Number: 24007SP Date: October 1, 2026 Staff received the attached unsolicited proposal from Mack Industries, Inc. for the design and construction of a new 0.350 MGD water reclamation facility to replace the existing 0.074 MGD facility. Staff is required to disclose the proposal.No action is being requested of the Board today. BACKGROUND: Staff has been working on a path forward to address treatment capacity needs in the Keystone Heights area economically and within CCNA limits previously stated to the Board of Supervisors. CCUA operates and maintains the Keystone Heights WRF that serves predominantly commercial customers in the Keystone Heights service area. The Keystone Heights RV Resort currently wants to expand and needs additional water reclamation capacity. There is potential for additional development in the Keystone Heights area,but much of the potential is speculative at this point in time. Staff worked with a consultant to develop a design for the Keystone Heights WRF. As staff disclosed on April 1, 2025, we expected the construction of the Keystone Heights WRF to be within the CCNA limits of $7.5M. In June, 2026, we informed the Board of Supervisors the Engineer of Record's Opinion of Probable Construction Cost of the final design exceeded $9.1M. Based upon this cost disparity, staff began researching other economical alternatives and approaches to the Keystone Heights WRF design. BUDGET: The recently adopted Capital Improvement Program includes a total project budget of$10,955,021 for the Keystone Heights WRF expansion. CCNA: CCNA, F.S. s. 287.055 does apply to this project. NEXT STEP: Staff will bring the unsolicited proposal back to the Board of Supervisors with a specific recommendation consistent with F.S. 255.065. ATTACHMENTS: Mack Industries, Inc. Unsolicited Proposal Mack Concrete Ind Inc. 23902 CR 561 Astatula Fl 34705 Date:June 26, 2026/Revised September 3, 2026 RE: Keystone Heights 350,000 GPD Design Build WWTP Mr. Darryl Muse Clay County Utility Authority Please find below the proposal and scope of work for a complete Design Build for a 350,000 GPD WWTP.The WWTP will be a precast Post Tensioned tank,the panels will be poured at the Mack FDOT approved Facility in Astatula, a crystalline additive will be included in the concrete mix design,the base slab will be field poured,Slabs and Walkways will be delivered, set, sealed and grouted and then field post tensioned. Signed and Sealed drawings with Calculations will be provided. 1 -New 350,000 GPD WWTP MLE process with a 4th stage for post anoxic and re-Aeration as per the attached preliminary drawing to include the following equipment: Manhole to receive the existing flow going to the existing plant.The 10"tie in will be made at the existing head works underground and run through 10"restrained C-900 pipe to the manhole at the new WWTP location at the top of the hill, Manhole will have an 80 mil coating of CIM. New Master Pump Station to be fed from the up stream manhole to include an 80 mil coating of CIM, duplex pumps on rails, sch 80 piping,All above grade piping to be DIP, flange plug valves and check valves,floats, DEP approved duplex Nema 4X Control panel, 1000 LB. rated SS Hoist and socket for pump removal, Hatch with safety grate, All Airline piping, diffuser drops and valves to be SS All wet process piping to be sch 80 PVC Aluminum Handrailing on walkways,Aluminum Stairway with landing Manual Static Screen at the headworks and a backup manual Aluminum Bar Screen Duplex Surge Pumps on Rails with Controls,Aluminum Flow Splitter Box 2-Submersible Anoxic Mixers on Rails with Controls 2-Nitrate Recycle Pumps on Rails with Controls 2-Centrifugal Motors and Blowers with Controls,VFD's (one running, one stand by) 1 -Surge Motor and PD Blower and controls 2-Submersible Post Anoxic mixers on Rails with Controls 2-Mechanical Chain and Flight Clarifiers with Scum trough, baffles,weirs and controls 1 -Dual CCC tank with Baffles and Chemical feed pumps, existing 250 gallon drum will be relocated to the new WWTP 2-Chemical feed pumps and drums for Methanol feed and PH Removal. 2—DO Probes 2—Auto Samplers, 1 on the influent end and 1 for the effluent. 1 —Cl2 analyzer and sample pump for continuous Cl2 monitoring 2—Mag meters on each RAS return line 1 —Influent Mag Meter on vertical Force Main into the Mechanical Screen 1 —Effluent Ultrasonic meter with V notch Weir 1 —eyewash and shower 1 —Pole Barn over the Generator Mack will pick up the closest water line and run a 2"line to the new WWTP and place 4- hose bibs and 4- hose racks on the WWTP 4"plug valves and camlocks on digesters for sludge pump out. All Control panels will be Nema 4X SS 3—Lights on the WWTP, 1 —Light at the entrance with Photo cells and Switches. Other Items: All signed and sealed drawings for the FDEP permitting, signed and sealed Electrical drawings, riser diagrams, electrical calculations as needed for Clay Electric.All electrical Drawings as needed for construction and construction permitting All electrical work including new meter, Main Breaker, MDP Panel, Step down Transformer.The existing generator and ATS will be disconnected and moved to the new WWTP area, existing Convault Diesel tank will be relocated and re piped at the new WWTP area. Effluent feed to the existing ponds will be a gravity feed with new pipe,valves to isolate each pond, 1 —riser pipe and splash pad in each pond, and overflow pipe will be installed between the ponds. Demolition of all of the items on the existing WWTP and removed from the site.All existing buildings will be left in place.Any items the County does not want will be removed from the site.All areas where Demo has taken place will be backfilled and compacted and seeded.All Concrete testing will be done by the FDOT approved lab at Mack Concrete. Items not included: New Fence, any damage to the existing fence during construction will be replaced or fixed, pump out and disinfection of the existing tanks prior to Demo, Construction Permit fees if any, Mack will pull any necessary permits.There are no power company fees included,we will do the coordination,we will let the County know if we need anything from them. No extension of existing water main for a Fire Hydrant, no mission Control/Scada. Assuming no extended Land Development Permits are needed. No ecological or environmental work. No permanent access roads. With the available information, it is assumed the existing ponds can be re- rated and used as is. If there is any work needed to the existing ponds,that is not included. Budget Number$7,950,000.00 I KEYSTONE HEIGHTS WRF EXPANSION , , Rao \ fiti z Y SCALE:1"=30' II ' // v -PROPOSEDI IQ • I / _-t-.' � INFLUENT I. � � / _. PUMP STATION i ,.� r1 I , I - I ' I I 1 VI i 1 -, I I j / EXISTING WRF I ' I _ Xx I 1 `� 110I � ' PROPERTY BOUNDARY RIB No. 1 ' I� f.111!..' I - -I �. 1 . .., $''►: 49'� , • RIB No. 2 I PROPOSED WRF , , --� I .. , i . , al! , I , ,. . I. , Ia i I I I I - , I I - - _L. , . .41. 1 __ _____ ___i_ ________ .._ ., '411111-1 ..., Iiiii - .. ,. _ , SW NIGHTINGALE STREET johaiiiii' ` ah6 C I DI�1,- �` J[N I C S E PTE M B E R 2026 Aclus Engineering, LLC 3- 145'-8" CIP BASE 141'-8" 18'-2" - - 12'-0" -- 55'-6" 12'-0"Im. 38'-0" OCHEMICAL ADDITION z z f DO PROBE 0 0 METHONAL FEED o No 37,500 GALLON DIGESTER I o 0 roz o w Q ! o CHEMICAL ADDITION o 0 133,500 GALLON AERATION _ ` O FOR PHOSPHOROUS ui o in L v N o w o REMOVAL o z < No Na oQ CLARIFIER 1 z o CO- 't N za N O CHEMICAL ADDITION < < w o FOR LIQUID CHLORINE ct w o 't z z ow zro o 0 o Q1 CLARIFIER Q 'n Q Q o1.6 w o0 o I 133,500 GALLON AERATION c EFFLUENT 0 0 i i� öQ '� o o oo x CHLORINE ro _1 Sr 0 z cn o 37,500 GALLON DIGESTER Li_ N Q DO PROBE 0 -o zz FLOW METER t I_ WWTP FEATURES: DESCRIPTION QTY. HP. 1 . TYPE 304 STAINLESS STEEL AIRLINE PIPING ALUMINUM HANDRAILING 2. SCH80 PVC WETLINE PIPING AERATION/DIGESTER BLOWERS 2 75 PRECAST POST TENSIONED 3. ALUMINUM HANDRAILING FLOW EQ BLOWER 1 25 CAP WALKWAY 4. SUBMERSIBLE RAS PUMPS ON VFD'S 5. SUBMERSIBLE NITRATE RECYCLE PUMPS ON VFD'S FLOW EQ PUMPS 2 1.5 PRECAST POST TENSIONED 6. DUPLEX SUBMERSIBLE FLOW EQUALIZATION PUMP MIXERS 4 2.3 WALL PANEL 7. TWO CENTRIFUGAL PLANT BLOWERS 1 / CAST IN PLACE (ONE DUTY, ONE STAND-BY) RAS PUMP 2 1.5 J f ��'— CONCRETE BASE 8. ONE PD FLOW EQ BLOWER 9. INFLUENT MAGNETIC FLOWMETER CLARIFIER DRIVE 2 1 v) •o 10. EFFLUENT ULTRASONIC FLOWMETER NITRATE RECYCLE 2 7.5 I 11. 480 VOLT/3 PHASE :1'- .."7 12. RAS RETURN MAGNETIC FLOWMETERS PARKSON HYCOR SCREEN 1 2 T 13. PARKSON HYCOR HELISIEVE SCREEN 14. MANUAL BYPASS SCREEN 15. SUBMERSIBLE ANOXIC MIXERS 16. TWO ALUMINUM STAIRWAYS 2'-0" 17. TWO AUTOMATIC SAMPLERS 18. DO PROBES MACK II �y ® DRAWN BY: ADM KEYSTONE HEIGHTS 1�/ 730 NIGHTINGALE ST. DATE: 6/17/26 KEYSTONE HEIGHTS, FLORIDA 201 COLUMBIA ROAD, VALLEY CITY, OHIO 44280 330-483-3111 SCALE: NTS 350,000 GPD WWTP, CLASS 3 RELIABILITY THIS DRAWING IS THE PROPERTY OF MACK INDUSTRIES, INC., AND IT OR THE PRELIMINARY LAYOUT TECHNOLOGY CONTAINED HEREIN MAY NOT BE REPRODUCED NOR USED EXCEPT AS REVISIONS: 6/26/26 AS INTENDED WITHOUT THE EXPRESSED CONSENT OF MACK INDUSTRIES, INC. DWG NO.: SHT. NO.: