Agenda 04/24/2012 Item #11A4/24/2012 Item 11.A.
EXECUTIVE SUMMARY
Recommendation to provide direction to resolve the outstanding Quincy Square
Homeowners Association discussion topics from the March 27, 2012 meeting, Agenda Item
11F.
OBJECTIVE: To provide the Board of County Commissioners (Board) with alternatives to
resolve all outstanding Quincy Square concerns.
CONSIDERATIONS: On March 13, 2012, an attorney representing the Quincy Square
Homeowners Association ( "HOA ") appeared before the Board via public petition (Agenda item
6 A) and requested financial relief from the Collier County Water -Sewer District ( CCWSD) in
the form of a credit for funds already paid for water bills. On March 27, 2012, the item was
discussed in further detail as Agenda item 11 F. The Board directed the County Manager to have
staff present additional details and information sufficient to allow the Board to make an informed
decision on a fair and equitable resolution.
Staff has prepared materials to address items brought forth during the March 27, 2012 meeting.
1. The Board acknowledged that the installation of the 2" meters for the 4 -unit residential
buildings was a result of the developer's request. The engineer and attorney representing
the HOA stated on record that there was a staff error in the meter sizing process by not
having completed Meter Sizing Forms for all permits issued in 2005. The following
information is provided to correct the record.
A Meter Sizing Form would not have been requested of the engineer of record as it was
not required for a multi - family building meter size determination in 2005. In 2005, the
Consolidated Impact Fee Ordinance (CIFO) 2001 -13, as amended, governed the multi-
family building meter sizing process through Appendix A, Schedule Two (Attachment
A). The meter size was determined by the buildings Equivalent Residential Connection
(ERC) value. The ERC value was determined by the square footage of the unit.
An ordinance change in 2007 (Ordinance 2007 -52) began the use of fixture values to
determine meter size. The meter size for a multi- family building according to the current
standard is determined by evaluation of the fixtures, or by the engineer of record
(Attachment B).
The Board indicated that it is inclined to authorize a credit for services paid for that were
not received. Direction was given to review the residential service lines installed by the
developer, analyze the findings, work with the HOA representatives, and provide values
for services provided and received.
With existing practices and procedures, the CCWSD has limited ability to determine the
diameter of the residential service line (the pipes leading from the meter to the residential
Packet Page -220-
4/24/2012 Item 11.A.
building) installed by the developer, unless CCWSD is granted access to private property.
To complete the review requested by the Board, the HOA during the March 27, 2012
meeting granted permission for staff to access private property. Staff proceeded to dig up
and restore private property to evaluate the residential service lines (identified all 1.5"
residential service lines but one).
As stated above, the 2" meters were installed at the developer's request. It is important to
note that the developer of Quincy Square designed, constructed, and paid for the
installation of the water mains, the water main service lines (the pipes leading from the
water main to the meter location), and the residential service lines (the pipes leading from
the meter to the residential building). The residential service lines were installed by the
developer's plumber after CCWSD staff installed the meters. At the time the 2" water
meters were installed, there was nothing inconsistent on site to indicate that a 2" meter
was not appropriate. Even if a 1.5" residential service line had been evident, the
installation of 2" meters would not have been contradictory to design capacity as there
are benefits to the configuration that may have been the intended purpose of the original
request by the developer.
Staff modeled and analyzed all water main service line —to meter —to residential service
line scenarios discovered at Quincy Square (Attachment C). The results demonstrate that
the HOA received benefit from having 2" meters even though 1.5" piping was used
downstream of the meter. Almost all of the available capacity was realized, with no
perceptible loss of pressure. Public Utilities engineering staff concludes that upgraded
and tangible services were received by the HOA as a result of the developer's request to
install larger size meters above the CCWSD's established minimum meter size.
3. Staff developed the following financial alternatives to resolve all outstanding concerns
with the HOA.
Alternative 1
i. Waive all meter installation costs. It should be noted that the original full
cost estimate for the cost of the removal /installation of the meters was
quoted as $14,440. Staff ultimately reduced the cost to a total of $ 1,770,
by including 17 of the meters under the meter replacement program.
ii. Provide a credit for the Recreational bldg. /pool meter in the amount of
$4,269.62 for a 4 year period.
iii. Provide no reimbursement for the residential buildings based on the
derived benefit of the requested 2" meters over the minimum meter size
requirement of a 1.5" meter. Attachment C summarizes the benefits
received in terms of capacity (gallons per minute) and pressure.
iv. Charge $14,938.12 for unbilled sewer usage for 7820 and 7844 Clemson
St. over a period of 4 years ($1,244.84 has been paid to date).
v. Net value equals a balance due of $10,668.50, net of payments to date.
Alternative 2
i. Waive all meter installation costs. It should be noted that the original full
cost estimate for the cost of the removal /installation of the meters was
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4/24/2012 Item 11.A.
quoted as $14,440. Staff ultimately reduced the cost to a total of $1,770,
by including 17 of the meters under the meter replacement program.
ii. Provide a credit of $101,273.46 for the billing differences for each account
over a period of 4 years (includes the Recreational bldg. /pool).
iii. Charge $14,938.12 for unbilled sewer usage for 7820 and 7844 Clemson
St. over a period of 4 years ($1,244.84 has been paid to date).
iv. Net value equals a credit of $86,335.34, net of payments to date.
Alternative 3
i. Waive all meter installation costs. It should be noted that the original full
cost estimate for the cost of the removal /installation of the meters was
quoted as $14,440. Staff ultimately reduced the cost to a total of $ 1,770,
by including 17 of the meters under the meter replacement program.
ii. Provide a credit of $1 17,707.91 for the billing difference for each account
from the time utility services were initiated (includes the Recreational
bldg. /pool).
iii. Charge $18,170.70 for unbilled sewer usage for 7820 and 7844 Clemson
St. from the time utility services were initiated.
iv. Net value equals a credit of $99,537.21, net of payments to date.
The Board's selection of either Alternative 2 or 3 could potentially shift developer
responsibilities and liabilities to the CCWSD that do not exist under current ordinances.
FISCAL IMPACT: Fiscal impact will be determined by the decision of the Board. It could
range from an increase in CCWSD operating revenues of $10,668.50, to a decrease of
$99,537.21.
GROWTH MANAGEMENT IMPACT: There is no growth management plan impact
associated with this executive summary.
LEGAL CONSIDERATIONS: This item is legally sufficient and requires a majority vote for
Board action. - JBW
RECOMMENDATION: That the Board of County Commissioners, as Ex- officio the
Governing Board of the Collier County Water -Sewer District, provide direction to resolve the
outstanding Quincy Square Homeowners Association discussion topics from the March 27,
2012, meeting, Agenda Item 11 F.
PREPARED BY: Tom Wides, Operation Support Director, Public Utilities Division
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4/24/2012 Item 11.A.
COLLIER COUNTY
Board of County Commissioners
Item Number: 11.A.
Item Summary: This item continued from the April 10, 2012 BCC Meeting.
Recommendation to provide direction to resolve the outstanding Quincy Square Homeowners
Association discussion topics from the March 27, 2012, meeting, Agenda Item 11 F. (George
Yilmaz, Public Utilities Administrator)
Meeting Date: 4/24/2012
Prepared By
Name: Gilbert Moncivaiz
Title: Impact Fee Coordinator,Utilities Finance Operation
4/11/2012 3:51:02 PM
Submitted by
Title: Impact Fee Coordinator,Utilities Finance Operation
Name: Gilbert Moncivaiz
4/11/2012 3:51:04 PM
Approved By
Name: WidesTom
Title: Director - Operations Support - PUD,Utilities Fina
Date: 4/11/2012 4:43:23 PM
Name: Joseph Bellone
Title: Manager - Utility Billing & Cust Serv.,Utilities Finance Operations
Date: 4/12/2012 8:34:42 AM
Name: ChmelikTom
Title: Project Manager, Principal,Public Utilities Engine
Date: 4/12/2012 8:48:21 AM
Name: Amysue Benker
Title: Executive Secretary,
Date: 4/12/2012 9:35:48 AM
Packet Page -223-
Name: WhiteJennifer
Title: Assistant County Attomey,County Attorney
Date: 4/12/2012 9:54:30 AM
Name: YilmazGeorge
Title: Director - Wastewater,Wastewater
Date: 4/12/2012 11:55:16 AM
Name: WhiteJennifer
Title: Assistant County Attomey,County Attorney
Date: 4/12/2012 1:10:08 PM
Name: KlatzkowJeff
Title: County Attorney
Date: 4/13/2012 9:31:24 AM
Name: GreenwaldRandy
Title: Management /Budget Analyst,Office of Management & B
Date: 4/13/2012 9:59:42 AM
Name: KlatzkowJeff
Title: County Attorney
Date: 4/13/2012 10:55:24 AM
Name: OchsLeo
Title: County Manager
Date: 4/15/2012 2:46:14 PM
Packet Page -224-
4/24/2012 Item 11.A.
4/24/2012 Item 11.A
V1ZQC1T T1TTaN Ntt)_ ?fk ld. 183
A RESOLUTION OF THE BOARD OF COUNTY COMMISSIONERS OF
COLLIER COUNTY, FLORIDA, AMENDING SCHEDULE TWO OF
APPENDIX A OF CHAPTER 74 OF THE COLLIER COUNTY CODE OF
LAW AND ORDINANCES, AS AMENDED, (THE COLLIER COUNTY
CONSOLIDATED IMPACT FEE ORDINANCE) TO INCREASE THE
WATER IMPACT FEE RATE FROM $2,570 PER EQUIVALENT
RESIDENTIAL CONNECTION (ERC) TO $2,660 PER ERC (A 3.5
PERCENT INCREASE); AND TO INCREASE THE SEWER IMPACT
FEE RATE FROM $2,950 PER ERC TO $3,010 PER ERC (A 2.0
PERCENT INCREASE) FOR ALL CUSTOMER CLASSES; PROVIDING
A DELAYED EFFECTIVE DATE OF JUNE 1, 2004.
WHEREAS, on March 13, 2001, the Board of County Commissioners
( Board) adopted Ordinance No. 2001 -13, the Collier County Consolidated Impact
Fee Ordinance, repealing and superceding all of the County's then existing impact
fee regulations, and consolidating all of the County's impact fee regulations into
one Ordinance, codified in Chapter 74 of the Collier County Code of Law and
Ordinances (the Code), and incorporating the water and sewer impact fee rates
established by the adoption of Ordinance No. 98 -69; and
WHEREAS, on December 11, 2001, the Board adopted Resolution No.
2001 -488 to amend Schedule Two of Appendix A of Chapter 74 of the Code, as
amended, (the Collier County Consolidated Impact Fee Ordinance) to increase the
Water and Sewer Impact Fee rates and direct staff to update the Impact Fee after
one year; and
WHEREAS, in accord with that direction, staff retained Public Resources
Management Group, Inc. (Consultant) to review the existing water and sewer
impact fees and to recommend changes to those fees when appropriate; and
WHEREAS, the Consultant has recommended that the County increase
water plant capacity by thirty (30) million gallons per day, and to increase sewer
treatment capacity by eighteen (18 million) gallons per day over the next ten (10)
years, at an estimated cost to future utility system users of approximately four
hundred and eighty -two million dollars ($482 million); and
WHEREAS, the Consultant has recommended a water impact fee rate
increase from $2,570 per ERC to $2,660 per ERC, (an increase of $90 - or 3.5
percent); and a sewer impact fee rate increase from $2,950 per ERC to $3,010 per
ERC (an increase of $60 — or 2.0 percent) for all customer classes, based on ERC
equivalents; and
Packet Page -225-
4/24/2012 Item 11.A.
,
WHEREAS, the above recommended rate increases establish the 61 1
rates at the maximum rates allowed in accord with Florida law; and
WHEREAS, staff has reviewed the Consultant's recommendations and
staff concurs with the recommended increases and recommends that the Board
adopt the attached revised Schedule Two of Appendix A of Ordinance No. 2001-
13, as amended, to implement these recommended water and sewer impact fee
rate increases; and
WHEREAS, the Board of County Commissioners accepts the
recommendations of the Consultant and from staff.
NOW, THEREFORE BE IT RESOLVED BY THE BOARD OF
COUNTY COMMISSIONERS OF COLLIER COUNTY, FLORIDA, that:
1. The Board of County Commissioners hereby declares, after
advertised public hearing, that the water and sewer impact fee rates set forth in the
revised Schedule Two of Appendix A of Ordinance No. 2001 -13, as amended,
attached hereto as Exhibit "A" and incorporated herein by reference (being a part
of the Collier County Consolidated Impact Fee Ordinance), are fair and
reasonable and are to be assessed against development that will receive benefits
from increased water facilities capacity, increased sewer facilities capacity, or
both, which increased capacity is necessitated by growth.
2. That these revised water and sewer impact fees will take effect as
of 8:00 A.M, on Tuesday, June 1, 2004.
This Resolution is adopted after motion; second and majority vote
favoring adoption this day
, 2004,
AfiTEST .f :,
BOARD OF COUNTY COMMISSIONERS
F ' PWIGHT•E. BROCK, Clerk
COLLIER CO Y, FLORIDA
B
By: ,%'ice J
De�utty'�ier
Atiist a3 Ao t:fit
DON A FIALA, Chairman
signetwe arty..
Approved as to form
and legal sufficiency;
Rein
N
a da
Da
4313
Thomas C. Palmer,
Assistant County Attorney
kec d
eGvh/ Cled
Packet Page -226- -
4/24/2012 Item 11.A.
8APPENDIX A
SCHEDULE TWO - EFFECTIVE APRIL 14, 2004
WATER & SEWER SYSTEM IMPACT FEE RATE SCHEDULE
RESIDENTIAL
INDIVIDUALLY METERED
LIVING SPACE
BASIS OF FEE
METER SIZE
ERC WATER SEWER
(SQ.FT)
ALLOCATION
lol
rarwvA INPACTFEE IMPACTFEE
9:;Q 4,999
3;2,570
sus
$2,')s
A Oil; o
RESIDENTIAL
MASTER METERED
LIVING SPACE BASH OF FEE
METER SIZE
ERC
WATER SEWER
(SQ.FT) ALLOCATION
Cox-di—)
IMPACT FEE IMPACT FEE
-B —4
:761 To 1,50() p- R—w � 4-: PUR RRO
1,591TO 4,999
i
PER WiT PER RRG
4 -4
PER ERG PBR-FAQ
67A 00" FUl A' fA TWAGIVUS)
FORIF KNOW 10*1 NO*
W.
NON- RESIDENTIAL
WATER METER
SIZE
ERC RANGE
WATER IMPACT FEE
SEWER IMPA CTFEE
ORCC"DEOVIVALEW
(Rand BACroo the oral ftwh)
MIN MAX
MIN MAX
.74
4
44
$23,30s
&4,4
W29,960 9 14' OW
4
2 1
&UG75-54
$;,045,905
- -___
spao,06
Packet Page -227-
AW*,
4/24/2012 Item 11.A.
APPENDIX A 8 (�
r
SCHEDULE TWO - EFFECTIVE June 1. 2004
WATER & SEWER SYSTEM IMPACT FEE RATE SCHEDULE
RESIDENTIAL
INDIVIDUALLY METERED
LIVING SPACE BASIS OF FEE
METER SIZE
ERC WATER .SEWER
(SQ FT.) ALLOCATION
(Er "'r`"` IMPACT FEE IMPACT FEE
Ra1ia,Nd ("ppK(1011J
0 TO 4,999
(AND NO MORE MAW PER UNIT
3/4° ] $2,660 $3,010
EATHEOOMS)
-- _- -_- - --
-�- - - -__- -PER
5,000 OR MORE � PER ERC
(OR MORE THAN 4 RA THROOMP
(GPM- 24)120}+1 BASED ON ERC
_- -_ERC - (GPM PROM A WWA MIIJ �- Minimum $2660 $3,010 -
- - -- -
RESIDENTIAL
MASTER METERED
LIVING SPACE
BASIS OF FEE METER SIZE
ERC
WATER
SEWER
(SQ.FT.)
ALLOCATION
(Ei "f�edepN "1
IMPACT FEE
IMPACT FEE
0 TO 750
i PER UNIT I PER ERC
0.33
$890 I $1,005
751 TO 1,500
PER UNIT PER ERC
0.67
I $2,010
$1,775
1,501 TO 4,999
I- - -- - --
(AND NO MORE THAN I
PER UNIT PERERC
1.0
$2,660 $3,010
NATYROOMS)
5,000 OR MORE
(OR,VORE THAN 4 NATHROOMS}
PER ERC I PER ERC
I
(GPM- 24y20) +I
(OPN FROM AWWA MIIJ
BASED ON ERC $3,010
,VLdp,w f1ff�
NON- RESIDENTIAL
WATER METER
SIZE
ERC RANGE
WATER IMPACT FEE
SEWER IMPACT FEE
ORCCWSDB MALENT
(RwiERCYtomeplmarow(I )
MIN MAX
MIN MAX
-- -.75
i 0 1.0
- -�
$2,660
$3,010
1.1 2.5
-
52,926 $6,650
$7,525
1.5 2.6 5.0 +
$6,916 I-
$13,300
-- $7,826 -i
-- $15,050
Z 5.1 7.9
- ---- j-- •--- - ---' - --
$13,566
• - - -- -
$21,014
$15,3S1
$23,779 _ _
3
- - - - -'
---- - - -- --
___.-- . --____
0- 54.9
-- - - - -- - -- _ _ -._- _ - - --
$21,280
_- _-- - -____ - �1
$146,034
;
$24,080 , I-
_
249 $!65, -
5,249
4 55.0 28,9
$146,300
-_ -- - - - -- - - - - --- - - - -- - --
$342,874 I $165,550 ;
- - - --
$387,989
I
6 I 129.0 357.9 I
$343,140
$952,014 $388,290
$1,077,279
8 358.0 600.0 I
$952,280 1
- --
$1,596,000 ! $1,077,580
$1,806,000
Packet Page -228-
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4/24/2012 Item 11.A.
square feet or more, or service to residential use having less sguare footage but having five or more
toilets, shall be determined by the ERC value that results from projected average daily flows
Projected average daily flows for residential use of 5.000 square feet living area or more or to have
more than four toilets, shall be determined by applying applicable provisions in the then current
edition of the Florida Plumbing Code. Projected average daily flows for non - residential uses shall be
determined by calculating the applicable provisions in the then current edition of the Florida
Plumbing Code coml2ared with the applicable provisions in the then current editions of the Florida
Administrative Code. The correct average daily flows for non - residential uses shall be the greater of
the Florida Plumbing Code calculation or the Florida Administrative Code calculation The Public
Utilities Administrator or authorized designees shall have final approval authority with regard to
these impact fee calculations."
SECTION TWO. CONFLICT AND SEVERABILITY.
In the event this Ordinance conflicts with any other Ordinance of Collier County or other
applicable law, the more restrictive shall apply. If any phrase or portion of this Ordinance is held
invalid or unconstitutional by any court of competent jurisdiction, such portion shall be deemed a
separate, distinct, and independent provision and such holding shall not affect the validity of the
remaining portions.
SECTION THREE. INCLUSION IN THE CODE OF LAWS AND ORDINANCES.
The provisions of this Ordinance shall be made a part of the Code of Laws and Ordinances of
Collier County, Florida. The sections of the Ordinance may be renumbered or re- lettered and
internal cross - references amended throughout to accomplish such, and the word "ordinance" may be
changed to "section," "article," or any other appropriate word.
SECTION FOUR. EFFECTIVE DATE.
This Ordinance shall become effective upon filing with the Florida Department of State.
PASSED AND DULY ADOPTED by the Board of County Commissioners of
Collier County, Florida this 0)&"'day of ,i; << _ , 2007.
ATTEST:
DWIGHT E. Ei+ WK,. CLERK
J1t 3'•`• tP Che t ra" x
S;I9natur ii
Approved as to form and legal sufficiency:
BOARD OF COUNTY COMMISSIONERS
OF COLLIER COUNTY, FLORIDA
POW
i
4/24/2012 Item 11.A.
APPENDIX A
SCHEDULE TWO: WATER AND WASTEMI A TER SEWER SYSTEM IMPACT FEE
RATESCHEDULE
w
INDPAPUALL44 METERED
IIT A =7' 1
no a '^teA ,-r rin7
(AA m n ��rnti�
(ru �r n er PER T NIT " 4-- $3,415.09 Q2 c7 c nn
B n T-HROOM84
5,000 OR N40RE BASED 0P�
(OD N4 D
gEF-�FE D� nom �� �
ru n � n Nfinimuni
BAT 14RC)OMS) 1$3,415.00
• _ � � � � � � � � a - 1. J• ■..1•
• •
I :VIP
4/24/2012 Item 11.A.
INDIVIDUALLY METERED SERVICE
LIVING SPACE tSQ.FT.)
ERC
VALUE
BASIS OF
FEE
WATER
IMPACT FEES
SEWER
IMPACT FEES
0 TO 4,999
(AND MAXIMUM OF 4
TOILETS}
1
Per ERC
$3,415
$3,515
5,000 OR GREATER
(OR MORE THAN 4
TOILETS)
ADF/ 350
(min value of
Per ERC
ERC VALUE x
$3,515
1.
(rounded to
the nearest
tenth
3 415
(minimum value
$3,4151
Non - Residential
ERC VALUE x
$3,515 (minimum
value $3,515)
MASTER METERED SERVICE
LIVING SPACE /SQ.FT.)
ERC
VALUE
BASIS OF
FEE
WATER
IMPACT FEES
SEWER
IMPACT FEES
Residential Unit - 0 TO 750
0.33
Per Unit
$1,125.00
$1,160.00
Residential 500 — 751 TO 1
0.67
Per Unit
$2,290.00
$2,355.00
Residential Unit 1,501 TO
1
Per Unit
$3,415.00
$3,515.00
Residential Unit - 5,000 OR
ADF/ 350
(min value of
Per ERC
ERC VALUE x
$3,415 (minimum
$3,515
GREATER (OR MORE THAN
4 TOILETS)
L. -01
(rounded to
the nearest
Non - Residential
ERC VALUE x
$3,515
(minimum value
$3,515'
value $3,415}
tenth)
ACRONYM KEY:
ADF - Avernae Daily Flows for proposed use as provided by FOR or Authorized
Representative
FOR - En ineer of Record for i rolect
ERC - Equivalent Residential Connection
4/24/2012 Item 11.A.
STATE OF FLORIDA)
COUNTY OF COLLIER)
I, DWIGHT E. BROCK, Clerk of Courts in and for the
Twentieth Judicial Circuit, Collier County, Florida, do
hereby certify that the foregoing is a true and correct
copy of:
ORDINANCE 2007 -52
Which was adopted by the Board of County Commissioners
on the 26th day of June, 2007, during Regular Session.
WITNESS my hand and the official seal of the Board of
County Commissioners of Collier County, Florida, this 27th
day of June, 2007.
DWIGHT E. BROCK
Clerk of Courts and Clerk
Ex- officio to Board of
County Commissioners
Teresa Pol-aski ,
Di§put:y Clerk
Packet Page -233-
4/24/2012 Item 11.A.
.ATTACHMENT C
to:
Executive Summary recommending direction to
resolve the outstanding Quincy Square Homeowners
Association discussion topics from the March 27,
2012, meeting, Agenda Item I I F.
Quincy Square Modeling
Prepared by:
Planning and Project Management Department
Collier County Public Utilities Division
Date:
April 10, 2012
Page 1
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4/24/2012 Item 11.A.
Attachment C
Quincy Square Modeling
Below is the Summary of Findings (See pages 4 -10 for supporting documentation):
Based on the modeling and results, Quincy Square receives approximately 38 GPM
(gallons per minute) of additional available capacity associated with a 2" meter as
compared to an 1.5" meter when the 2" meter is connected to an 1.5" residential service
line. This maximum available flowrate is 90% of what would be attained through a 2"
residential service line; therefore, Quincy Square received 90% of the Capacity Benefit of
a 2" meter by using an 1.5" pipe. (Reference Table C -3.)
Likewise, at peak flow design conditions, Quincy Square 2nd floor units experience
approximately 55.8 PSI (pounds per square inch) of water pressure when connected to an
1.5" residential service line connected to a 2" meter. This pressure is 97% of what would
be attained through a 2" residential service line with a 2" meter; therefore, Quincy Square
received 97% of the Pressure Benefit of a 2" meter by using an 1.5" pipe. The difference
between 55.8 PSI and 57.6 PSI is imperceptible. (Reference Table C -4.)
Quincy Square received substantial benefit of having 2" meters even though 1.5"
piping was used downstream of the meter. 90 to 100% of the available capacity was
realized, with no perceptible loss of pressure. Further, all configurations benefitted
from increased water pressure with 2" meters as compared to 1.5" meters.
BENEFIT SUMMARY
Water Main
Water
Available
Pressure
Service Line
Residential Service
Capacity
(main to
Meter
Line (meter to bldg)
Benefit of
Benefit
Size
2" Meter
meter)
2" Meter
1.5" compared
2„
21'
2"
90%
°
97Q
i
to pipe
• The reserved capacity of a 2" meter is between zero and 160 GPM.
• The reserved capacity of an 1.5" meter is between zero and 100 GPM.
• Any ability to receive over 100 GPM with a 2" meter is a benefit over an 1.5"
meter.
Page 2
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4/24/2012 Item 11.A.
SUMMARY BY CONFIGURATION AND BUILDING
Configuration
Number of
Buildings
Building,
Address "
Available
Capacity Benefit
of 2" Meter
A
(1.5" Pipe)
5
7820 Clemson St.
100010
7821 Clemson St.
100%
7827 Clemson St.
100%
7870 Clemson St.
100%
7874 Clemson St.
100%
B
(1.5" Pipe)
13
7831 Clemson St.
90%
7832 Clemson St.
90%
7835 Clemson St.
90%
7836 Clemson St.
90%
7840 Clemson St.
90%
7844 Clemson St.
90%
7848 Clemson St.
90%
7849 Clemson St.
90%
7852 Clemson St,
90%
7856 Clemson St.
90%
7859 Clemson St.
90%
7860 Clemson St.
90%
7865 Clemson St.
90%
C 1
(2" Pipe)
1
7869 Clemson St.
100%
(1.5'CPi e)
i
7873 Clemson St.
90%
Configuration
Number of
Btuldings
Building
Addzess
Available
Capacity Benefit
of '1.5" Meter
D
(1.5" Pipe)
2
7877 Clemson St.
100%
7881 Clemson St.
100%
Because worst -case conditions were used for all addresses, some addresses may actually exhibit
greater benefit than was modeled and stated above.
Page 3
Packet Page -236-
4/24/2012 Item 11.A.
SUPPORTING
DOCUMENTATION
Quincy Square Modeling
Prepared by:
Planning and Project Management Department
Collier County Public Utilities Division
April 10, 2012
Page 4
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4/24/2012 Item 11.A.
Preface:
The Board requested Staff to determine if Quincy Square benefitted from the use of 2"
water meters where there was an 1.5" residential service line downstream of the meter.
Five original water distribution configurations exist for the 22 buildings at Quincy
Square, labeled A, B, C1, C2, and D. Four variants shown below as Configurations A, B,
Cl and C2 are relevant to the Board's question. Configuration D is not in question
because 1.5" meters have been installed with 1.5" residential service lines in two
buildings since construction. The quantity of buildings with each type of configuration is
also shown below.
Page 5
Packet Page -238-
Conf duration A
Configuration B
2" 2" 1.5„ To 7 Bldgs
Meter
2„ 2„ 1.5"
To 5 Bldgs
2 „
Meter
I
2 7„ 1.5"
Meter 10 To 6 Bldgs
Configurations C1 & C2
Configuration D
2„ 2,> ^0
To 1 Bldg
Meter Confi I
2" � g C )
2" 1.5" 1.5
No Meter 0 To 2 Bldgs
Meter To 1 Bldg
(Config C2)
Page 5
Packet Page -238-
4/24/2012 Item 11.A.
Data:
The lengths, diameters, and elevations of pipes used in the model were acquired from
Quincy Square plans dated December 2004. A worst -case scenario for flow restriction
(pressure drop) was created, shown in Table C -1:
CONNECTION DATA
Pipe section
Len_ tthh �_
Diameter
Water main to water
50 feet
2"
meter (long side)
Water meter to
backflow preventer
2 feet
See Below
assembly
i Meter assembly to
25 feet
1.5"
building
or 2"
Inside building to
97 feet
69 feet of 1.5"
farthest unit garage
and 28 feet of 1"
Garage to 2" floor
living space
10 feet
1 " i
Table C -1
On March 29, 2012, staff measured the static pressure of the water supply located at
Quincy Square. The measured value of 88 PSI was used as the system pressure for all
model configurations. Hydraulic modeling was conducted in -house using Bentley
Systems WaterGEMS software, version 08.11.03.16.
'eater Meter and Backflow Preventer:
1.5" Water Meter
Master Meter Co.
Multi Jet
Flow rating: 0 - 100 GPM
1.5" and 2" Backfiow Preventer
Wilkins 975 XL
2" Water Meter
Elster Ameo
0700
Flow rating: 0 -- 160 GPM
• The reserved capacity of a 2" meter is between zero and 160 GPM.
The reserved capacity of an 1.5" meter is between zero and 100 GPM.
• Any ability to receive over 100 GPM with a 2" meter is a benefit over an 1.5"
meter.
Page 6
Packet Page -239-
Anallvsis:
4/24/2012 Item 11.A.
Configuration A
211 2" 1.5 1
to Meter 0 To 5 Bldgs
CONFIGURATION "A" CAPACITV — '; R1TT1.n1Nd-_Q
i able c-2
Configurations B. C I & C2
_2" 1 2" 11.5" To 7 Bldgs 2" To I Bldg
-r (Config Cl)
2"
Meter (Conf
— (Config B)
2" 2' To I Bldg
!!� ....... To 6 Bld I '
Meter gs Me ter] (Config C72)
After modeling all of the configurations it was determined that the services with "Y"
connections (Configurations B. Cl and C2) represent the worst-case scenarios out of
the five total configurations. In order to determine if Quincy Square benefitted from
the use of 2" water meters with 1.5" pipes, Configurations B and C2 were compared
with C 1, the baseline as directed by the Board. The resulting flo'ATates and pressures
are shown in Tables C-3 and C-4 respectively:
Page 7
Packet Page -240-
Water Main
Residential
-...-T,
� d_j i t —io r� W —1
—A'v- —ai I-a-b- i _e
°h
4 of
Service Line
Water
Service Line
Flowrate
Capacity
Capacity
0
Bid
(main to
Meter
(meter to
at
Available
Benefit
U
meter)
size
bldg)
Building
Above
of 2"
1.5" meter
Meter
A
160 GPM
60 GPM
100%
i able c-2
Configurations B. C I & C2
_2" 1 2" 11.5" To 7 Bldgs 2" To I Bldg
-r (Config Cl)
2"
Meter (Conf
— (Config B)
2" 2' To I Bldg
!!� ....... To 6 Bld I '
Meter gs Me ter] (Config C72)
After modeling all of the configurations it was determined that the services with "Y"
connections (Configurations B. Cl and C2) represent the worst-case scenarios out of
the five total configurations. In order to determine if Quincy Square benefitted from
the use of 2" water meters with 1.5" pipes, Configurations B and C2 were compared
with C 1, the baseline as directed by the Board. The resulting flo'ATates and pressures
are shown in Tables C-3 and C-4 respectively:
Page 7
Packet Page -240-
4/24/2012 Item 11.A.
CONFIGURATIONS 11111",K. "C" CAPAC ITV — 1,; Rlill .i 1Ni- -Q
i awe u -s
CONFIGURATION "B" & "C" PRF.SSiiRF. – 15 RIiii,DiNC�q
i
Water Main
�—
Residential
Pressure
Additional
Available
Water Main
of
Service Line
Water
Service Line
Flowrate
Capacity
Capacity
J
Bldgs
(main to
Meter
Size
( meter ta
at
Building
Available
Above
Benefit
of 2"
Meter
for Four
(meter to
meter)
of 2"
bldg )
i
meter)
Size
Units
bldg}
Living
Meter
–
1.5" meter
Meter
B
13
2"
2"
1.5"
j 138 GPM
38 GPM
55.8 PSI
97% '
Cl
1 1
2
154 GPM
54 GPM
Baseline
C�
1
2"
2"
1.5
138 GPM
38 GPM
94
i awe u -s
CONFIGURATION "B" & "C" PRF.SSiiRF. – 15 RIiii,DiNC�q
I able C;-4 * 1 1 °la increase over 1.57' meter (52.1 psi)
Configuration D
21' „ ,
0 M
— ter 1.5' To 2 Bldgs
CONFIGURATION "D" CAPACITY – 2 RUILDiNC:S
i
Water Main
�—
Peak
Pressure
—�
of
Water Main
Water Main
Water
Residential
Flowrate
at 2nd
Pressure
+�
# of
Service Line
Service Line
Service Line I
Capacity of
Benefit
o
Bldgs
{main to
Meter
for Four
(meter to
Floor
of 2"
C.0
meter)
meter)
Size
Units
bldg}
Living
Meter
–
(I Building)
Space
Meter
B
�I3
2"
�2",
2"
1.5" 55.4 GPM
55.8 PSI
97% '
Cl
1 1
2"
2" GPM
57.6 PSI*
Baseline
Z"
_55.4
1.5" 55.4 GPM
55.8 PSI
97%
I able C;-4 * 1 1 °la increase over 1.57' meter (52.1 psi)
Configuration D
21' „ ,
0 M
— ter 1.5' To 2 Bldgs
CONFIGURATION "D" CAPACITY – 2 RUILDiNC:S
1 able C: -5
CONFiGI)RATiON "D" PRFSSi1RF – 7 RIIiI .DiNi-N
i
Water Main
�—
Peak
Residential
Pressure
Available
of
Water Main
Water
Residential
j
i
Bldgs
4
..=.
# of Service Line
Water
Service Line
Flowrate at
Capacity of
Capacity
P
i
Bldgs (main to
Meter
{meter to
Building
I.5" Meter
Benefit
(1 Building)
1.5" 55.4 GP%4– 1
meter)
Size
bldg}
of 1.5"
Meter
�—D
2 2"
1.5"
1.5"
100 GPM
100 GPM
_
100%
1 able C: -5
CONFiGI)RATiON "D" PRFSSi1RF – 7 RIIiI .DiNi-N
1ffa.1 IM&I
Page 8
Packet Page -241-
i
Water Main
�—
Peak
Residential
Pressure
of
Service Line
Water
Flowrate
Service Line j
at 2nd
Bldgs
4
( main to
Meter
: for Four
(meter to
I-loor
l
meter)
Size
bldg) Units
Living
I
....,'..._.._..
-- 2 -�–
._5„ (
(1 Building)
1.5" 55.4 GP%4– 1
Space
52.1 PSI j
1ffa.1 IM&I
Page 8
Packet Page -241-
4/24/2012 Item 11.A.
Modeling Conditions for Tables C -2 through C -5;
I . 88 PSI static water main pressure
2. Piping connections in Table C -1
3. PVC pipe C- factor of 150
-1. Standard atmospheric pressure
5, 20- degrees C water temperature
SUMMARY BY CONFIGURATION AND BIIII.DIN(.
Configuration
Number of
Buildings
Building
Address
Available
Capacity Benefit
of 2" Meter
A
(1.5" I'ipe)
5
7820 Clemson St.
100%
7821 Clemson St.
100%
7827 Clemson St.
100 0/0
7870 Clemson St.
100%
7874 Clemson St.
100%
B
(1.5" Pipe)
l 3
783 l Clemson St.
90%
7832 Clemson St.
90%
7835 Clemson St.
90%
7836 Clemson St.
90%
7840 Clemson St.
90%
7844 Clemson St.
90%
7848 Clemson St.
90%
7849 CIemson St.
90%
7852 Clemson St.
90%
7856 Clemson St.
90%
7859 Clemson St.
90%
7860 Clemson St.
90%
7865 Clemson St.
90%
C 1
t2„ Pipej
1
7869 Clemson St.
100 0.0
C2
(1.5" Pipe.)
1
7873 Clemson St.
90%
Configuration
Number of
Buildings
Building
Address
Available
Capacity Benefit
of 1.5" Meter
U i
(1.5" Pipe)
7877 Clemson St. j
100%
7881 Clemson St.
100%
Fable C -7
Because worst -case conditions were used for all addresses, some addresses may actually exhibit
greater benefit than was modeled and stated above.
Pace 9
Packet Page -242-
4/24/2012 Item 11.A.
Results /Conciusion:
Based on the modeling and results, Quincy Square receives approximately 38 GPM of
additional available capacity associated with a 2" meter as compared to an 1.5" meter
when the 2" meter is connected to an 1.5" residential service line. This maximum
available flowrate is 90% of what would be attained through a 2'' residential service line;
therefore, Quincy Square received 90% of the Capacity Benefit of a 2" meter by using an
1.5" pipe. (Reference Table C -3.)
Likewise, at peak flow design conditions, Quincy Square 2nd floor units experience
approximately 55.8 PSI of water pressure when connected to an 1.5" residential service
line connected to a 2" meter. This pressure is 97% of what would be attained through a
2" residential service line with a 2" meter; therefore, Quincy Square received 97% of the
Pressure Benefit of a 2" meter by using an 1.5" pipe. The difference between 55.8 PSI
and 57.6 PSI is imperceptible. (Reference Table C -4.)
Quincy Square received substantial benefit of having 2" meters even though 1.5"
piping was used downstream of the meter. 90 to 100% of the available capacity was
realized, with no perceptible loss of pressure. Further, all configurations benefitted
from increased water pressure with 2" meters as compared to 1.5" meters.
BENEFIT SUMMARY
fable C -8
Modeling and analysis conducted by the Planning and Project Management Department
Collier County Public Utilities Division:
R9arl �un»r.. Principal Project M�1n i�cr Aaron C Cromer, Principal Project Manager
WaterGEMs Certified Expert Modeler
Nathan Beal; Project Manager, PMP 'Iom Chmelik. Director PP%1 4D. PMP
WaterGEMs Certified Expert Modeler
Page 10
Packet Page -243-
Water Main
Line
Water
ater
Residential Service
Meter
Capacity Pressure
Benefit Benefit
(main to
1,
Line (meter to bldg)
of of
Size
2" Meter 2" Meter
meter)
1.5" compared to 2"
` pipe
90% 97%
fable C -8
Modeling and analysis conducted by the Planning and Project Management Department
Collier County Public Utilities Division:
R9arl �un»r.. Principal Project M�1n i�cr Aaron C Cromer, Principal Project Manager
WaterGEMs Certified Expert Modeler
Nathan Beal; Project Manager, PMP 'Iom Chmelik. Director PP%1 4D. PMP
WaterGEMs Certified Expert Modeler
Page 10
Packet Page -243-
4/24/2012 Item 11.A.
17�0_ 1 TETRA TEC
MEMORANDUM
To: Aaron Cromer, PE, MBA
From: Andrew Woodcock, PE, MBA
Re: Review of Quincy Square Modeling Results
Date: April 12, 2012
No: 200 - 08486 -12005
Tetra Tech has completed its review of the modeling results for Square. In conducting the review
the following information provided by Collier County was provided:
• Specifications and operating curves for an Elster C700 2" meter
• Specifications for a Wilkins Model975XL Reduced Pressure Principal Assembly
• Attachment C to: Executive Summary to the BCC 4/10/12
• Quincy Square Master Site plan Record Drawings wf annotations
• Hydraulic Modei created by the County
In addition Tetra Tech consulted various engineering references and conducted interviews with
Collier County Public Utilities Department staff.
The hydraulic analysis focuses on determining the amount of available capacity and pressure of a
2" meter with a 1.5° downstream service line, which is representative of the conditions at Quincy
Square. This is compared to the available capacity and pressure of a 2" meter with a 2°
downstream service line, which is a more common configuration.
Based on our review of the model Tetra Tech has the following findings:
• 'he hydraulic models for the five meter configurations (A, B, C1, C2 and D) appear to
correctly approximate the installation although the line lengths, materials and sizes have
not been independently verified.
• The use of 88 psi system pressure appears reasonable given typical system pressures
and the proximity of Quincy Square to the water treatment plant.
• The use of a C factor of 150 is appropriate for the piping age and material.
• The head loss associated with the meters and backflow preventers are accurate when
compared to manufacturer's data.
201 >_: Fine Street, SU'te 1000, Orlando. FL 32801
407.839.3955 407.839.3790 4w,rw.tetratech.com
Packet Page -244-
4/24/2012 Item 11.A.
'ETRATECH, INC.
• in estimating the peak flow demand for the buildings, using the flow rate as indicated by
the fixture units provides a reasonable approximation.
As a result of the review and findings Tetra Tech took the liberty to test the sensitivity of the
model and makes the following recommendations:
• Conduct model simulations over a range of initial system pressures instead of the single
88 psi.
• Conduct a field calibration to verify the C factor used in the model.
• Add the head loss curve of the meter directly into the model. It is not expected that this
recommendation will materially alter the results, however, it does provide for a more
robust model.
In support of these recommendations Tetra Tech conducted limited additional simulations that
tested the sensitivity of the model to changes in the static pressure and C factor. These
simulations were run for the B, C1 and C2 configurations and produced results with a more
conservative static pressure (80 psi instead of 88 psi) and a more conservative C factor (140
instead of 150). It is important to note that these simulations were conducted only to determine
how changes in the initial conditions may affect the model results. A summary of the results is
presented in the tables below.
Table 1 Configurations B and C, Capacity with a C factor of 140
Configuration
Flow Rate at Building
Capacity above 1.5"
meter
Capacity Benefit of a
2" meter
B
130 gpm
30 gpm
90%
C1
144 gpm
44 gpm
Baseline
C2
130 gpm
30 gpm
90%
Table 2 Configurations B and C, Pressure with a C factor of 140
Configuration
Peak Flow Rate
Pressure at 2" Floor
Pressure Benefit of a
2" meter
B
55.4 gpm
54.0 psi
96%
C1
55.4 gpm
56.2 psi - --
-- Baseline
C2
55.4 gpm
54.0 psi
96%
Table 3 Configurations B and C, Capacity with Static Pressure at 80 psi
Configuration
Flow Rate at Building
Capacity above 1.5"
meter
Capacity Benefit of a
2" meter
qpm
90%
143 gpm
_^ 43 gpm
Baseline
CI 2
129 gpm
29 gpm
90%
Packet Page -245-
4/24/2012 Item 11.A.
TETRATECH, INC.
Table 4 Configurations B and C, Pressure with Static Pressure at 80 psi
Configuration
Peak Flow Rate
Pressure at 2" Floor
Pressure Benefit of a
2" meter
B
55.4 gpm
47.8 psi
98%
C1
55.4 9prn
48.8 psi
Baseline
`C2
55.4 gpm
47.8 psi
98%
Under both of these scenarios, which represent more conservative initial conditions, the results
are very similar to those obtained with the County's analysis.
Based on the review conducted to date, Tetra Tech concludes that the hydraulic model has a
sufficient level of detail and, subject to the recommendations above, includes reasonable
assumptions to simulate the Quincy Square issue. The hydraulic calculations demonstrate that a
2" meter with a 1.5" service line can provide 90% of the potential capacity of a standard 2" meter
configuration to Quincy Square. In addition the results show that a 2" meter with a 1.5" service
line provides 97% of the pressure that would be provided by a standard 2" meter configuration.
End of Memorandum.
Packet Page -246-