Item 4D - Water Model UpdateAGENDA ITEM:
SU BMITTED BY:
DATE:
CITY OF ATLANTIC BEACH
CITY COMMISSION MEETING
STAFF REPORT
Water M~pdate
):,_ft-E'~L-
Do ug las E. OJ ton P.E .. Publi c Wo rks Director
March 20 . 20 15
ST RATEGI C PLAN LINK: N /A
AGENDA I TEM # 40
APRIL 13,201 5
BACKGROUND: The City's wate r d istributi on hyd rau lic mode l was last updated in 20 07. Sin~.:c
th at time , sys tem c han ges have occurred, such as co nstru cti o n ofthe At lnntic Bcuc h Co untry Club , a
new schoo l o n S tate Ro ad A I A, a nd the plan ned improvements a t th e Ocea ngu tc subdiv isio n.
Regular upd ates o f th e hyd ra ul ic mode l s ho uld be made to s imul ate the performance of the system.
T his wi ll he lp ident ify prob lem areas in the wate r sys tem and ass is t in pri oriti z ing cn pitul
improve ment s.
We have prev iou s ly purc hase mode lin g so tl wa rc that will int eg rate wit h th e Cit y's G IS Sys tem . Thi s
model wi ll be used by th e consu lt ant under thi s auth ori zatio n to co ns tru ct and ca lib rate the mod e l.
Specifi c model run s will be com pl ete d including an ana lys is to help de tcnn im: if water plant 114 (2X4R
Mayport Road) should be ph ased ou t o r improved . Aller thi s engi neerin g task the co ns truc ted model
will be turned over to the Ci ty so thnt many of the future system ex pan s ion and imp rovements ca n be
modeled in-house.
Co ll ins Engi neering was selected ror thi s assignmen t because th ey arc fam iliar with our system fi'tH n
wo rkin g o n wate r· re lated proj ects an d stud ies fo r the City and ha ve expe ri ence wi th the model ing
soH ware.
The cos t for the wa ter model development/con struction , speci li e model run s, pressure gra dient map
and a suggested cap it al improvement pl an is $35 ,19 1.
BUDG ET: $60,000 was budgeted in accoun t number 400 -5502-533-63 00 for wa ter mode li ng and
oth e r ut ilit y item s.
RECOMM ENDATIONS: Auth orize J. Co lli ns Eng in eeri ng, LLC to co mpl ete the Water System
Hydraulic Modelin g in the amo unt or$35, I 9 1 und er th eir co ntinu ing co nt ract w ith the Cit y in
accorda nce with their proposa l.
ATTACHMENTS: Cos t propo sa l fi·o m Co llins Engi nee rin g dated 3/19/15
REVIEWED BY C ITY MANAGER: :h { 4et<t ~~""~
J. COLL INS fNGJNEERING ASSOCIATES . LLC
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March 19, 2015
Donna Kaluzniak
Utility Director
City of At lantic Beach
902 Assisi Lane
Atla ntic Beach, FL 32233
AGEN DA ITEM# 4 0
A PRI L 13,20 15
Re : E ngineering Services for Ci ty of Atla nt ic Beach , FL -Preparation of Potable
Water System Hydra ul ic Model
Dear Donna:
J . Co llin s Engineering Associates, LLC (J CEA) is pleased to provide an engineering fee
proposal for the potable water system hydraulic model. The new water system hydraulic
model w ill serve th e City in many ways and provide benef its i ncluding:
• Analytical t ool to eva luate immediate a nd long t erms potabl e wa ter needs of th e
city.
• Ide ntify potential problem areas i n th e water system
• Identify need f or s hort and lo ng term water capi tal improvement projects
• Plan for new development by knowing accurate water pressures and capacity
ava il ability throug hout the water system .
A scope of work and fee proposal is attached for your consideration .
If you have a ny question s, please ca ll me at 716-6282 (Ce ll ).
Sincerely,
John E . Co llins, Jr., P .E.
Cc Kayle Moore, PE
WATER SYSTEM HYDRAULIC MODELING SCOPE
PROJECT NAME: City of Atlantic Beach -Water System Hydraulic Modeling
AGENDA ITEM # 4D
APRIL 13,2015
PART 1.0 PROJECT SUMMARY: Prepare a potable water hydraulic model of the entire
City of Atlantic Beach (CoAB) service area. The service area includes both the CoAB corporate
limits plus the old Buccaneer service area. The hydraulic model will be serve as a tool to
analyze the immediate and long terms potable water needs of the city. The model will endeavor
to identify problem areas in the water system and identify need for short and long term water
capital improvement projects as well as allow City staff to plan for and address new
developments or growth in the water system.
PART 2.0 PURPOSE OF THE MODEL: The hydraulic model will simulate the hydraulic
performance of the water distribution system under both steady-state and extended-period
conditions. Specific individual scenarios for analyzing various demand and/or system
configurations conditions may be included, such as:
-Average day condition
-Maximum day condition
-Fire flow demand
-Various pumps out of service
-Various elevated tanks out of service
-Various ground storage reservoirs out of service
-Combinations of the above
PART 3.0 SCOPE OF SERVICES: The scope of services to be performed by J. Collins
Engineering Associates, LLC (JCEA) includes:
Task 1-Model Development/Construction
• CoAB will purchase new hydraulic modeling software,"WaterCAD" (latest version available)
as manufactured by Bentley Systems, Inc. JCEA will utilize the City's software and set up
the data files.
• Historical Document Review-Review current Water Master Plan prepared by CDM in 2001
and revised in 2007 (Water Model Update) and 2009 Water Facilities Plan Update -Well 2R,
as well as City historical and maintenance records on the water system (distribution piping,
water wells, water treatment, pumping and storage). In addition, previous studies, planning
documents or reports (Comprehensive Plan, CUP, Capacity Analysis Reports, etc) that
address population growth, development projections, or change in land use shall be
provided by CoAB. CoAB will attempt to obtain a copy of the computer model data file from
the consultant that prepared the 2007 Water Model Update.
• CoAB shall assist JCEA in obtaining the computer model data file from designer of new
potable water system for Atlantic Beach County Club for the new water system. This will be
verified and included in the new model.
• Develop Future Population Projections/Water Demand. City to provide historical water plant
and water meter records. Review and update as required based on population projection
included in 2014 Water Master Plan Update.
• Model Construction:
AGENDA ITEM # 4D
APRIL 13, 2015
1. JCEA will work with designated city staff to ascertain the type of model to be
constructed ("all pipes" vs. "reduced" vs. "skeletonized").
2. Physical facilities data:
a. Pipe and appurtenances -JCEA will utilize information contained in the
City's geographic information system (GIS). It will be incumbent upon
CoAB to verify the accuracy of the information contained in the various
system component databases (i.e. -pipe sizes, lengths, materials, ages,
end node locations, etc.). Horizontallocational information will be taken
directly from the CoAB GIS. Verticallocational information will be taken
from the CoAB GIS if available. Should vertical locational information be
incomplete/nonexistent, JCEA will attempt to utilize digital elevation
model (DEM) information with assistance as required by CoAB GIS
personnel utilizing CoAB GIS software. This proposal does NOT include
the purchase of any digital dataset information.
b. Pumps & Tanks-JCEA will utilize information obtained from CoAB and
from the recently completed Water Master Plan Update. Field verification
may be required in case of missing/conflicting information. JCEA will
make a reasonable effort to obtain physical information such as make,
model number, pump curve, etc., but cannot guarantee that all such
information is available.
c. Demand data: JCEA will utilize CoAB demand data exclusively. This data
will be imported from CoAB water billing data and spatially allocated via
the modeling software as "Average Daily" flow values. Obviously incorrect
demand data allocations will be corrected. System water loss will be
included in the model. Water loss data will be provided by CoAB and will
be spatially allocated to demand nodes proportionally.
d. Demand Scenario Construction: JCEA will construct various demand
scenarios as described in the following paragraphs. JCEA will work with
city staff to construct differing scenarios to address potential problem
areas within the system.
e. Steady-State Simulations
-Average Day Flow-this is the "base" scenario.
-Maximum Day Flow-typically a multiple of the base scenario, but may
be based on actual system historical data.
-Peak Hour Flow-typically a multiple of the base scenario, but may be
based on actual system historical data.
-Fire Flow-typically based on a required minimum flow and pressure
impressed at a particular point in the system on top of the Maximum Day
Flow.
-Seasonal Variations-typically based on historical data documenting
system-wide seasonal demand fluctuations.
-Other -Other scenarios may be included based on conversations with
city staff.
f. Extended-Period Simulation (EPS) -EPSs typically attempt to mirror the
operation of the system over some defined period of time. EPSs typically
require the addition of control schema to turn pumps on and off (or vary
their speed if driven by variable speed motors), tank fill valves to open
AGENDA ITEM# 4D
APRIL 13, 2015
and close, and (possibly) system valves to open and close, in response to
demand and/or pressure fluctuations. Demand changes over time can be
programmatically accomplished using diurnal curves. JCEA proposes to
use the diurnal curve set forth in AWWA M32-"Computer Modeling of
Water Distribution Systems", figure 2-12.
-Average demand using diurnal curve
-Fire flow-average demand with fire flow(s) impressed at various
locations within the system
-Other-Other EPS scenarios requested by city staff as may be
reasonably accommodated.
g. Model Calibration:
JCEA will endeavor to calibrate the base model based on best available
information and best practices. In general JCEA will utilize CoAB-
provided information. This information may be supplemented with specific
field tests. JCEA will provide 16 man-hours for field testing. JCEA will
require the assistance of CoAB staff in planning and coordinating field
testing plus test equipment. JCEA cannot guarantee model accuracy.
h. Water Quality Simulation: No water quality simulation or modeling is
included.
i. Transient Analyses: No transient analyses (such as water hammer) are
included.
j. Storage Tank Mixing and Water Age: No storage tank mixing or water
age analyses are included.
Task II -Conduct Specific Model Runs
• Conduct average daily and maximum day plus fire flow hydraulic modeling across the entire
CoAB potable Water System to determine specific areas where the potable water system
has needs or deficiencies. Based on various computer model runs, develop options to
eliminate the deficiencies in the water system.
• Conduct average daily and maximum day plus fire flow hydraulic modeling to determine the
need for capital improvements related to WTP#4 (if WTP#4 should be phased out or
improved). Determine if the other three City WTPs can provide sufficient water supply for the
service area of WTP#4. Determine if piping improvements can eliminate the need for, or
improve the performance of, WTP#4. Summarize capital costs and present options to the
city to determine the most cost-effective solution for WTP#4.
• Conduct average daily and maximum day plus fire flow hydraulic modeling to address
hydraulic concerns addressed in the 2007 Water Distribution System Model Update
(indicated that the current water distribution system did not meet Maximum Day Flow plus
Fire Flow in several areas of the City). Determine if these areas have hydraulic concerns at
the present time and what specific upgrades are required. Based on various computer
model runs, develop options to eliminate the deficiencies in the water system.
Task Ill -Deliverables & Recommendations
AGENDA ITEM # 4D
APRIL 13, 2015
• Plot of map of current water system Pressure Gradients (hard copies to be printed out by
CoAB)
• All Model runs shall be provided in digital pdf format (no hard copies or printed out by CoAB)
• Deliver computer model and CoAB's software back to the City. Assist with installation on city
computer if required. Provide overview of model and software to city staff. Assist in one day
modeling training if requested by the city.
• Based on results of Task II, provide summary ofwater system improvements-New Water
Distribution System Capital Improvement Program.
• Attend up to four (4) City meetings for purposes to include but not limited to: review with city
personnel -scheduling of field work/testing; update on construction of model; list of critical
water distribution piping projects; scheduling of capital improvements projects; etc.
MANHOUR & REIMBURSEABLES BREAKDOWN
March 19, 2015
City of Atlantic Beach FL ·Water System Hydraulic Model '
LABOR COSTS Man Hours/Labor Rates
WORK BREAKDOWN Principle PM PE TECH Clerical
Hourly Rate $58.00 $50.00 $46.00 $30.00 $18.00
Task 1-Model Development
1. Review Exist. Reports -Water Demand/Supply/
Population Data & Future Growth Projections 1 4 0 0 2
2. Develop Future Population Projections/Water Demands 1 4 0 0 0
3. Setup of Hydraulic Model: 1 8 0 2 0
Model Construction & Develop Physical Facilities Data:
4. Piping & Appurtances 1 80 0 0 0
5. Pumps & Tanks 2 10 0 0 0
6. Water Demand Data 2 12 0 0 0
7. Demand Scenario Construction 1 15 0 0 0
9. Field Testing 0 16 0 0 0
10. Model Calibration 1 16 0 2 0
Task 11-Conduct Various Model Runs
1. Conduct Various Model Runs 6 16 0 2 0
Task Ill-Deliverables
1. Preparation of Digital Documents 4 8 0 0 2
2. Deliver Model & Setup w/City 4 8 0 0 0
3. Summarize Findings Into Water CIP 2 4 0 0 2
3. Review Meetings with City 6 10 0 0 0
Totals 32 211 0 6 6
Principle
Project Manager
PE -Engineer
Technician
Clerical
SUBTOTAL DIRECT LABOR COSTS
OVERHEAD at 2.5
PROFIT ON OH/DL -9%
TOTAL LABOR FEE
REIMBURSABLE COSTS Quantity Unit Price
Mileage 500 Ml $0.55
Courier & Postage 1 $45.00
Copying 1 LS $200.00
Plottting 40 SHTS $2.00
SUBTOTAL REIMBURSABLE COSTS
TOTAL ENGINEERING COST I
AGENDA ITEM# 4D
APRIL 13. 2015
TOTAL
$294.00
$258.00
$518.00
$4,058.00
$616.00
$716.00
$808.00
$800.00
$918.00
$1,208.00
$668.00
$632.00
$352.00
$848.00
$12,694.00
$1,856.00
$10,550.00
$0.00
$180.00
$108.00
-----------------
$12,694.00
$31,735.00
$2,856.15
$34,591.15
$275.00
$45.00
$200.00
$80.00
$600.00
$35,191