HomeMy WebLinkAbout10.b EDB KH WRF Mack Industries Unsolicited Prop EXECUTIVE SUMMARY
AGENDA ITEM:
Recommendation for the Unsolicited Proposal for Design and Construction of New Water
Reclamation Facility (WRF) in Keystone Heights (Proposal)
Job Number: 2210-022
Financial Job Number: 24007SP
Date: October 16, 2026
Staff received the attached unsolicited proposal from Mack Industries (Mack) for the design and
construction of a new 0.350 MGD WRF to replace the existing 0.074 MGD facility. As required
by Florida Statute, staff disclosed the proposal at the October 6, 2026, Board of Supervisors
meeting. Staff seeks approval from the Board of Supervisors to negotiate an agreement with Mack
for the implementation of the unsolicited proposal.
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.
Staff worked with a consultant to develop a design for the expansion of the Keystone Heights WRF
from 0.074 to 0.200 MGD. 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 that 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.
At the October 6, 2026, Board of Supervisors meeting, staff disclosed receipt of an unsolicited
proposal from Mack to design, permit, and construct a new 0.350 MGD WRF (Project).
Unsolicited proposals from a private entity and a Responsible Public Entity (RPE) are regulated
by F.S.S. 255.065 (Statute). CCUA has reviewed the Statute and determined the Project to be a
qualifying project. Further, the Statute requires an RPE to consider the factors established in
255.065(3)(c) in making the determination that a qualifying project is in the public interest. Those
factors are:
1. The benefits to the public.
2. The financial structure of and the economic efficiencies achieved by the proposal.
3. The qualifications and experience of the private entity that submitted the proposal and such
entity's ability to perform the project.
4. The project's compatibility with regional infrastructure plans.
5. Public comments submitted at duly noticed public meetings.
//DP(Author)
//JP,AE(Review)
//DD (Final)
CCUA staff, including Procurement, Engineering, Operations, and Finance, considered those
factors and determined that the Project is in the public interest. With that determination,the Statute
authorizes an RPE to proceed with the unsolicited proposal.
The Project benefits the public by satisfying existing demand for treatment capacity with an
entirely new facility. The facility will be capable of serving potential projected growth through
2050 including regional infrastructure plans such as expansion of the Keystone Heights Airport
and septic-to-sewer conversion projects. The economic efficiencies include adding capacity for
$22.71 per gallon of treatment capacity ($4,542.86/ERC) as opposed to $72.41 per added gallon
of capacity ($14,482 /ERC). The lower cost alternative considered here aligns more closely with
CCUA's current sewer capacity charge, $4,528.20 / ERC. Additionally, the Project utilizes a
process and equipment nearly identical to that used at CCUA's other facilities.
Mack Industries started as a precast concrete product provider and has been in business since 1932.
They have expanded to include construction and maintenance services for wastewater and
stormwater treatment. Mack currently operates in thirteen (13) states and has successfully built
similar plants including one recently completed for the Melrose School District. CCUA staff will
ensure the capability of the firm to meet our standard bonding and insurance requirements before
recommending execution of a contract with the company.
Finally, an RPE must provide the public an opportunity to comment at two (2)duly noticed public
meetings. The Project was introduced and disclosed at the October 6, 2026, Board of Supervisors
meeting and there were no public comments. The October 20,2026,Board of Supervisors meeting
will be the second public meeting at which members of the public will have the opportunity to
comment on the Project.
BUDGET:
The FY 26/27 adopted budget includes $10,955,021 for the Keystone Heights WWTF expansion.
The budget has sufficient funds to complete the Project including the 10% contingency required
by the CIP Performance Management Policy.
CCNA:
This unsolicited proposal centers on the delivery of a fully constructed facility,and is not classified
as a solicitation for professional services.
RECOMMENDATION:
Staff respectfully request the Board of Supervisors authorization to negotiate an agreement with
Mack Industries for the services specified in the attached unsolicited proposal in the amount of
$7,950,000. Staff will return to the Board for authorization to execute a contract for the final
negotiated scope and fee.
ATTACHMENTS:
Mack Industries Unsolicited Proposal
//DP(Author)
//JP,AE(Review)
//DD (Final)
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 ,
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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
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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.:
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.: