EXHIBIT B irrigation designCRI
(PR
can
P.O.
Wet
FLO'
Pair- _
Flow Available:
112.10 gpm Flow Available: 225.00 gpm
PRESSURE AVAILABLE
Static Pressure at POC:
0.00 psi
Booster Pump pressure provided:
70.00 psi
Pressure Available:
70.00 psi
DESIGN ANALYSIS
20.00 ft
Maximum Multi -valve Flow:
100.00 gpm
Flow Available at POC:
112.10 do,
Residual Flow Available:
12.10 gpm
CriticalStation:
3
Design Pressure:
45.00 psi
Friction Loss:
3.30 psi
Fittings Loss:
0.33 psi
Elevation Loss:
0.00 psi
Loss through Valve:
4.71 psi
Pressure Req. at Critical Station:
53.35 psi
Loss for Fittings:
0.65 psi
Loss for Main Line:
6.46 psi
Loss for POC to Valve Elevation:
0.00 psi
Loss for Ba
0.00 psi
Ccal Stationckflow: Pressure at POC:
60.46 psi
Pressure Available:
70.00 psi
Residual Pressure Available:
9.54 psi
PRESSURE AVAILABLE
Static Pressure at POC:
83.00 psi
Elevation Change:
5.00 ft
Service Line Size:
4"
Length of Service Line:
20.00 ft
Pressure Available:
80.00 psi
DESIGN ANALYSIS
Maximum Multi -valve Flow:
108.99 gpm
Flow Available at POC
225.00 aom
Residual Flow Available:
116.01 gpm
Critical Station:
64
Design Pressure:
45.00 psi
Friction Loss:
4.45 psi
Fittings Loss:
0.44 psi
Elevation Loss:
0.00 psi
Loss through Valve:
2.39 psi
Pressure Req. at Critical Station:
52.29 psi
Loss for Fittings:
0.69 psi
Loss for Main Line:
6.94 psi
Loss for POC to Valve Elevation:
0.00 psi
Loss for Backflow:
11.18 psi
Loss for Water Meter:
2.85 psi
Critical Station Pressure at POC:
73.95 psi
Pressure Ava'la ble:
80.00 Ds'
Residual Pressure Available:
6.05 psi
AREAS OF IRRIGATION
SYMBOL
(D 0 40 80 120 160 feet
NORTH 1"=40'
DESCRIPTION
NON MAINTAINED AREAS -
1.5 -INCHES PER THE FIRST 48 HOURS
(INSTALLED BY DEVELOPER)
BACKYARDS (ROTORS) -
0.5 -INCHES PER THE FIRST 48 HOURS
(INSTALLED BY BUILDER)
TOTAL WATER DISCHARGED AREA OF DISCHARGE
48,080 GALLONS 63,979 SF
6,427 OF 1.47 AC
16,806 GALLONS
2,163 OF
FRONT & SIDE YARDS (SPRAYS) - 7.721 GALLONS
0.5 -INCHES PER THE FIRST 48 HOURS 1,031 OF
(INSTALLED BY BUILDER) TOTAL
71,986 GALLONS
9,622 OF
54,430 SF
1.25 AC
25,517 SF
0.58 AC
TOTAL
143,927 SF
3.30 AC
NARRATIVE a per station per minute basis.
Arbor Glen is a proposed residential development at Lyman Boulevard (CSAH18)
and Highway 101 in Chanhassen, MN. The developer intends to use landscape
irrigation as a stormwater management tool consistent with current Riley
Purgatory Bluff Creek Watershed District (RPBCWD) stormwater management
standards and BMP guidelines.
DESIGN TO HARVEST STORMWATER
This design calls for an irrigation distribution pipeline to draw stormwater from a
stormwater pond located at the southeast corner of the development. The area of
the pipeline more completely designed, depicts the first eight stations of
equipment (groups of sprinkler emission devices) to distribute stormwater onto
non -maintained land within the development. The pipeline distribution segment
illustrated schematically, represents the approximately 58 remaining stations of
equipment that shall distribute stormwater onto maintained landscape area of the
development. Total area to receive stormwater distribution from both distribution
segments of irrigation equipment is approximately 3.49 acres. Irrigation ofthe
single family homes is required and necessary for stormwater management
purposes.
WATER, BACKUP WATER, METERING and PROTECTION
All water will be metered. Reduced Pressure Zone backflow prevention assembly
(RPZ) will be incorporated into the design to protect the public water supply from
cross -contamination. RPZ assemblies are considered the highest
cross -contamination hazard protection by the Minnesota Department of Health
and shall be regularly tested, reported and immediately repaired upon failure of
testing.
ACHIEVING STORMWATER BMP GOALS, SYSTEM DESIGN AND OPERATION
Current RPBCWD stormwater treatment volume calls fora minimum of the first
1.05" of stormwater treatment per qualifying rain event. The minimum treatment
volume is divided as follows:
• Volume Retained -0.5 inches from the site impervious area
• Water Quality Treatment -0.55 inches from the site impervious area
The irrigation distribution equipment in it's entirety, will result in a system that
exceeds minimum required RPBCWD stormwater treatment volumes listed above
as well as ability to execute horticultural BMPs for landscape irrigation - including
efficient use of water resources- upon the area of horticulturally -maintained
landscape. Although the intended goal is to harvest and distribute stormwater
upon the site, proper and efficient use of all water can be accomplished while also
accomplishing the goals of stormwater distribution during or following a rain event.
All components selected for this project will be of high quality, high market
presence and will be designed and constructed in a workmanlike, maintainable
fashion. The stormwater pump station will be a pre -manufactured unit of
integrated, maintainable components and UL -listed as an assembly. Pump station
controls will include external meter -reader, adjustable stormwater-level equipment
to enable pump station engagement when pre-set water levels are met and to
interrupt pump station operation and convert to backup municipal water when
stormwater levels are at or below minimum, vandal -resistant alarm light and points
of seasonal equipment maintenance.
Secondary protected, non -potable water source will flow through a meter and
reduced pressure zone backflow, prevention assembly and will include points of
seasonal equipment maintenance consistent with local practices. A low voltage,
three -port valve will distinguish between stormwater harvest and municipal water
use based on pond level and pump station controls.
RPBCWD stormwater guidelines call for controls to manage pond bounce to not
less than four -feet of depth upon completing stormwater distribution following a
storm event. The proposed system controls will accomplish this goal. The
stormwater pond normal water level (NWL) is proposed to be 899.5 and not less
than four -feet of depth at NWL. The 100 -year high water level (HWQ is proposed
to be 903.5. The adjustable level controls will be set to engage stormwater harvest
at levels higher than 899.5.
There will be an irrigation controller to operate distribution equipment. The
controller will be WaterSense® -labelled as promoted by the US Environmental
Protection Agency and will be remote -control upgrade -ready. The controller will be
programmed to use water efficiently per horticultural BMPs during normal,
non -storm event periods or when the stormwater pond levels are insufficient to
enable use of stormwater for horticultural irrigation.
EXPLANATION OF CALCULATIONS AND USE AND RUNTIME MODELS
Referring to Sheet IR -2.1, the chart "WATERING SCHEDULE - NON -MAINTAINED
AREA" illustrates gallons per minute per station (group) of sprinkler emission
devices and application rates (in inches -per -hour) per station. There are eight
stations of irrigation proposed upon the non -maintained area of the development.
Also illustrated is total gallons of water to be distributed upon the non -maintained
landscape. The totals of the eight stations of irrigation achieve the required
minimum stormwater distribution for the development
The right-hand chart on Sheet IR -2.1, depicts a Runtime Summary of all stations of
irrigation further illustrating that this proposed stormwater management BMP
exceeds the minimum requirement for the development.
Runtime Summaries include operation based on a scheduling method called
"syringe cycling" or "cycle and soak". This approach is programming -based and
adjustable. The intent is to enable applications of water at a rate and duration to
maximize the ability of the soil to absorb the water applied. From a stormwater
perspective, syringe -cycle schedu ling maximizes acceptance of stormwater onto
and into the soil. From a horticultural perspective, syringe -cycle scheduling
promotes stronger and more vigorous plant material. The graphs beneath each
runtime summary illustrates the time required to apply water given a
base -cycle -and -soak application approach.
DEVELOPER SCOPE
Developer scope includes installation of the stormwater pump station, back-up
municipal water supply, irrigation mainline for all areas and control system for all
areas. The Developer scope also includes installation of the remote control valves,
decoders, field surge protectors, piping and sprinkler emission devices for the eight
stations serving the non -maintained areas of the development.
BUILDER SCOPE
Builder scope includes all remote control valves, decoders, lateral pipe and
sprinkler emission devices for the approximately 58 stations to serve the single
family homes. Irrigation of the single family homes is required and necessary for
stormwater management purposes.
Builder -installed irrigation distribution plans to be approved by Developers
Representative prior to commencement of work. Broadcast irrigation only. Plans
shall be furnished in Autocad format 2016 or newer, to scale and indicating
equipment specified, appropriate locations and water consumption projections on
GENERALNOTES
CALL BEFORE YOU DIG! �lYL
MINNESOTA LAW REQUIRES EXCAVATORS TO NOTIFY Ow
THE REGIONAL NOTIFICATION CENTER AT LEAST TWO
(2) BUSINESS DAYS BUT NOT MORE outdoor water use, Reuse, Design,
THAN FOURTEEN (14) CALENDAR DAYS con:wring &water Management
PRIOR TO EXCAVATION 115lames Ave N I Mlnne Ils, "1 1115
ad
GOPHER STATE p763.559.10101 f 763.559.7779
ONE CALL www.watermn.e"m
www, gopherstateonecall,arc
1-800-252-1166 �� N MGTo2
3�
OPYRIGHT
1. THIS SYSTEM IS DESIGNED TO MEET SPECIFIC DESIGN CRITERIA
PROVIDED BY THE CLIENT AND SHALL BE INSTALLED AS PER
DESIGN AND PROJECT SPECIFICATION.
2. BIDDING INSTALLERS SHALL THOROUGHLY READ AND BECOME
FAMILIAR WITH ALL FACETS OF THE PROPOSED STORMWATER
HARVEST/REUSE SYSTEM, INCLUDING DESIGN, SPECIFICATIONS,
INSTALLATIONDETAILS, AND RELATED SECTIONS.
3. CONFIRM LIMITS OF IRRIGATION, EXISTING AND FUTURE HARDSCAPE
PRIOR TO CONSTRUCTION.
4. UNLESS OTHERWISE SPECIFIED, THE PLANS AND SPECIFICATIONS
ARE INTENDED TO INCLUDE EVERYTHING OBVIOUSLY REQUISITE AND
NECESSARY FOR THE PROPER INSTALLATION AND COMPLETION OF
THE WORK WHETHER EACH NECESSARY ITEM IS MENTIONED HEREIN
OR NOT,
5. THE PLANS AND SPECIFICATIONS ARE INTENDED TO BE
COOPERATIVE AND ANY ITEM CALLED FOR IN ONE AND NOT THE
OTHER SHALL BE AS BINDING AS IF CALLED FOR IN BOTH.
DISCREPANCIES SHALL BE BROUGHT TO THE ATTENTION OF THE
IRRIGATION CONSULTANT.
6. VALUE ENGINEERING OF THE STORMWATER HARVEST/REUSE SYSTEM
SHALL NOT BE ALLOWED.
7. STORMWATER PUMP SYSTEM IS DESIGNED TO OPERATE AT 100 GPM
@70 PSI TO COMPLETE THE WATERING SCHEDULE WITHIN
48 - HOURS MAXIMUM.
8. HORTICULTURE BASED MUNICIPAL SYSTEM IS DESIGNED TO OPERATE
AT 108 GPM @ 83 PSI.
9. ALL TURF LANDSCAPE AREAS WITHIN THE BUILDER SCOPE LIMITS OF
IRRIGATION SHALLBE IRRIGATED INCLUDING THE OCCASIONAL NEED
TO INSTALL ADDITIONAL SPRINKLERS NOT SHOWN ON THE
IRRIGATION PLAN, HEAD-TO-HEAD COVERAGE PER MANUFACTURER
RECOMMENDATIONS AND INDUSTRY BEST PRACTICES.
10. LOCATE ALL UNDERGROUND UTILITIES AND STRUCTURES PRIOR TO
COMMENCING WORK ("CALL BEFORE YOU DIG").
11. NEW OR SUBSTANTIALLY CHANGED STATIONS OF IRRIGATION SHALL
BE APPROVED IN WRITING BY IRRIGATION CONSULTANT PRIOR TO
INSTALLATION.
12. AVOID OVERSPRAY ONTO ROADS AND SIDEWALKS.
13. SPRINKLER ARCS SHALL BE DETERMINED ON SITE BY THE
IRRIGATION INSTALLER TO PROVIDE THE MAXIMUM COVERAGE
POSSIBLE. CAREFULLY ADJUST THE ARC AND RADIUS OF EACH
SPRINKLER TO PROVIDE HEAD-TO-HEAD COVERAGE.
14. IRRIGATION INSTALLER SHALL FURNISH SLEEVE MATERIAL FOR
INSTALLATION BY OTHERS UNDER ALL ROADWAYS, WALKS AND
DRIVEWAYS WHERE NECESSARY.
15. MAINLINE PIPING BENEATH TRAFFIC AREAS SHALL BE INSTALLED
WITH A MINIMUM EARTH COVER OF 36 -INCHES FROM BOTTOM OF
ROAD SUB -GRADE.
16. TOP OF MAINLINES SHALL BE AT LEAST 18 -24 -INCHES BELOW
GRADE IN TURF AREAS.
17. TOP OF LATERAL LINES SHALL BE AT LEAST 12 -18 -INCHES BELOW
GRADE.
18. IT MAY BECOME NECESSARY TO ADJUSTMAINLINE, LATERAL PIPE,
CONTROLS AND SPRINKLER LOCATIONS DUE TO TREES, PLANTINGS,
GRADE DIFFERENCES, OR OTHER LANDSCAPE CONDITIONS.
19. PROPERLY THRUST BLOCK ALL FITTINGS 3 -INCH AND LARGER.
20. DO NOT TRENCH THROUGH THE ROOT BALLS OF NEW PLANTINGS.
21. PROVIDE A TWO-INCH SPACE (MINIMUM) BETWEEN THE TOP OF
VALVE AND BOTTOM OF VALVE BOX COVER. PROVIDE BLOCK
SUPPORT OF VALVE BOX IN GROUND AND PLUMB POSITION TO
GRADE. WOOD SUPPORTS ARE NOT ACCEPTABLE.
22. WATER SUPPLY, BACKFLOW PREVENTION ASSEMBLY AND PLUMBING
AS PER LOCAL CODE.
23. FINAL LOCATION OF WATER SOURCE TO BE APPROVED BY SITE
DESIGN IRRIGATION CONSULTANT.
24. UTILITY CONTRACTOR IS RESPONSIBLE FOR WATER CONNECTION.
25. IRRIGATION INSTALLER IS RESPONSIBLE FOR FURNISHING AND
INSTALLING THE BACKFLOW PREVENTION ASSEMBLY.
26. IRRIGATION INSTALLER IS RESPONSIBLE FOR FURNISHING, INSTALLING
AND CONNECTION AND COMMISSIONING OF THE IRRIGATION PUMP
STATION.
27. IRRIGATION CONTROL WIRE SHALL BE #14 GA. 2 -WIRE, IRRIGATION
WIRE, UL LISTED FOR DIRECT BURIAL.
28. OWNER SHALL SUPPLY 110 VOLT ELECTRICAL POWER FOR
CONTROLLER OPERATION.
29. CONNECT IRRIGATION ELECTRICAL WIRING IN ACCORDANCE WITH THE
NATIONAL ELECTRIC CODE AND ALL APPLICABLE LOCAL ELECTRIC
UTILITY CODES, INCLUDING:
29.1. ALL ELECTRICAL WIRE SHALL BE INSTALLED WITH THE MAINLINE
PIPE WHERE POSSIBLE. SNAKE WIRE SIDE TO SIDE AT BOTTOM
OF TRENCH BENEATH MAINLINE.
29.2. PROVIDE 24 -INCH LOOP OF CONTROL WIRE AT ALL CHANGES IN
DIRECTION.
29.3. PROVIDE 36 -INCH OF SLACK WIRE AT EACH REMOTE CONTROL
VALVECOILED INSIDE VALVE BOX.
29.4. ALL WIRING BENEATH HARDSCAPES SHALL BE CONTAINED IN
SLEEVING, SEPARATE FROM PIPING. ELECTRICAL SLEEVES ARE
TO BE SIZED APPROPRIATELY FOR EASE OF INSTALLATION AND
REPAIR.
29.5. ALL WIRE SPLICES SHALL BE GREASE FILLED WATERTIGHT
CONNECTORS CONTAINED IN VALVE BOX, SET TO GRADE AND
SHALL NOT HAVE LESS THAN 24 -INCH SLACK.
29.6. ALL ELECTRICAL WIRE SHALL BE SLEEVED SEPARATE FROM
WATERLINE.
30. WIRED RAIN SENSOR SHALL BE INSTALLED, ONE PER CONTROLLER,
IRRIGATION INSTALLER SHALL ASSURE RAIN SENSOR INSTALLATION
OCCURS IN A CLEAR LOCATION, WHERE RAIN FALL HITS THE DEVICE
FROM ALL SIDES & IS NOT BLOCKED BY BUILDINGS, LANDSCAPE
STRUCTURES OR PLANTS.
31. ELECTRICAL CONTRACTOR SHALL FURNISH AND INSTALL ALL
ELECTRICAL EQUIPMENT FOR PUMPS.
32. ELECTRICAL CONTRACTOR SHALL FURNISH AND INSTALL ALL LINE
VOLTAGE EQUIPMENT FOR IRRIGATION CONTROLLERS.
33. ELECTRICAL CONTRACTOR SHALL FURNISH DATA CONNECTION FOR
IRRIGATION CONTROLLERS.
34. IRRIGATION INSTALLER SHALL SCHEDULE AND PROGRAM CONTROLLER
AND VALVES FOR APPROPRIATE LANDSCAPE WATER REQUIREMENTS.
35. IRRIGATION INSTALLER SHALL MAKE PROVISION FOR NOT LESS THAN
FOUR (4) HOURS OF TRAINING OF THE OWNER IN THE
PROGRAMMING, OPERATION, ADJUSTMENT AND MAINTENANCE OF THE
IRRIGATION SYSTEMS.
36. IRRIGATION INSTALLER IS RESPONSIBLE FOR CLEANING STREETS
SIDEWALKS AND DRIVEWAYS DURING AND UPON COMPLETION OF
INSTALLATION.
yT
M MOj\O
COPYRIGHT REGISTERED
TO WATER IN MOTION, INC.
z
z
LU
Ln
U0
Q
Z
Q
U
Z
LL
J
0
CID
Q
DRAWN BY
RICH W. KOECHLEIh
PLA, Vbkeresns® Partner
CHECKED BY
TIM MALOOLY
GID, GIG, GLIA
EPA WaterSense Partner
DEQARE THAT THIS PIAN,
'RECIFICATION OR REPORT WA$
'REPARED BY ME OR UNDER MY
SCI
19 Y C Nat rise
ISSUED RECORD
MO. DESCRIPTION DATE
ISSUE DATE
1-25-2015
PROJECT NUMBER
DI -7-1 1-73-01
DRAWING SCALE
1 "=40'-O"
SHEET NAME
RR I GATI ON
OVERSTORY
SHEET NUMBER