HomeMy WebLinkAbout021 L602 Irrigation Notes1.IRRIGATION SYSTEMS MUST BE DESIGNED TO MEET THE FOLLOWING SPECIFICATIONS.
1.1.IT IS THE INTENT OF THIS DESIGN THAT ALL IRRIGATION EQUIPMENT BE INSTALLED
WITHIN THE PROJECT LIMITS. ANY EQUIPMENT SHOWN OUTSIDE OF THESE LIMITS IS
SHOWN FOR GRAPHICAL CLARITY ONLY.
1.2.THE ENTIRE IRRIGATION SYSTEM SHALL SATISFY ALL LOCAL AND STATE CODE
REQUIREMENTS AND BE INSTALLED AS PER ALL CITY OF BOZEMAN SPECIFICATIONS.
2.BACKFLOW DEVICE AND CONTROLLER
2.1. A BACKFLOW DEVICE COMPLIANT WITH THE CITY’S CURRENTLY ADOPTED PLUMBING
CODE FOR USE IN AN IRRIGATION SYSTEM IS REQUIRED;
2.2.IRRIGATION CONTROLLERS LABELED BY U.S. ENVIRONMENTAL PROTECTION AGENCY’S
WATERSENSE® PROGRAM ARE REQUIRED. EXCEPT FOR PARKS AND IRRIGATION
SYSTEMS WHERE THE WATER SUPPLY IS FULLY INDEPENDENT OF CITY OWNERSHIP OR
MAINTENANCE, THE CONTROLLER MUST BE PROGRAMMED TO ACCOMMODATE ANY
WATER WINDOWS OR RESTRICTIONS FOR OPERATION SUCH AS THE DAY OF THE WEEK
AND HOURS OF THE DAY PURSUANT TO BMC 40.02.1290.; AND
2.3.SENSORS (RAIN, FREEZE, WIND, ET, SOIL MOISTURE, ETC.), EITHER INTEGRAL OR
AUXILIARY, THAT SUSPEND OR ALTER IRRIGATION OPERATION DURING UNFAVORABLE
WEATHER CONDITIONS OR WHEN SUFFICIENT SOIL MOISTURE IS PRESENT ARE
REQUIRED.
2.4.SPARE CONTROL WIRES -CONTRACTOR SHALL EXTEND THREE SPARE CONTROL WIRES
( ONE COMMON AND 2 CONTROL WIRES) FROM EACH CONTROLLER TO THE END OF THE
MAINLINE SERVING THAT CONTROLLER OR AS SHOWN ON THE PLANS. INSTALL SPARE
WIRES IN A 10" ROUND VALVE BOX.
3.SPRINKLERS/OVERHEAD IRRIGATION
3.1.ALL OVERHEAD IRRIGATION MUST CONSIST OF MULTI-STREAM, MULTI-TRAJECTORY
(MSMT) NOZZLES, OR AN APPROVED EQUAL, AND/OR ROTORS;
3.2.HEAD(S) SUBJECT TO LOW HEAD DRAINAGE MUST BE EQUIPPED WITH INTEGRATED
CHECK VALVES TO AVOID DRAINING WHEN THE SYSTEM COMPLETES ITS CYCLE;
3.3.SPRINKLER HEADS MUST BE SPACED 2 INCHES MINIMUM FROM HARDSCAPE EDGES AND
INSTALLED FLUSH WITH FINISHED GRADE;
3.4.OVERHEAD IRRIGATION MUST USE A 6 INCH MINIMUM RISER;
3.5.OVERHEAD IRRIGATION SPACING MUST BE DESIGNED TO ACHIEVE HEAD-TO-HEAD
COVERAGE OR PER MANUFACTURER SPECIFICATIONS;
3.6.AREAS LESS THAN 8 FEET IN WIDTH IN ANY DIRECTION MUST BE IRRIGATED WITH DRIP
IRRIGATION, EITHER SUBSURFACE OR ABOVE GROUND. OVERHEAD SPRAY IRRIGATION
IS PROHIBITED IN AREAS LESS THAN 8 FEET WIDE UNLESS BEING USED FOR
TEMPORARY ESTABLISHMENT PURPOSES ONLY; AND
3.7.IT IS ENCOURAGED TO CONNECT ALL SPRINKLER BODIES TO THE LATERAL LINE WITH
FLEXIBLE SWING JOINTS OR SWING PIPE.
4.DRIP IRRIGATION
4.1.DRIP IRRIGATION MUST BE USED FOR ALL LANDSCAPED AREAS OTHER THAN
TURFGRASS, CREEPING OR ROOTING GROUNDCOVERS, AND SEEDED AREAS;
4.2.DRIP IRRIGATION MUST INCLUDE A PRESSURE REGULATOR AND FILTER;
4.3.INLINE DRIP IRRIGATION INSTALLED ON A SLOPE MUST LAY PARALLEL TO THE
ELEVATION CONTOURS;
4.4.DRIP IRRIGATION MUST BE INSTALLED WITH THE ABILITY TO EASILY FLUSH THE LINE;
AND ALL SUBSURFACE DRIP MUST BE INSTALLED WITH AIR/VACUUM RELIEF VALVES PER
MANUFACTURER RECOMMENDATIONS.
4.5.DO NOT MECHANICALLY TRENCH WITHIN DRIP LINE OF EXISTING TREES. WHERE
TRENCHING WITHIN DRIP LINE IS NECESSARY, ONLY HAND TRENCHING WILL BE
PERMITTED.
4.6.CONTRACTOR SHALL COORDINATE INSTALLATION OF DRIP IRRIGATION LINES PRIOR TO
INSTALLATION OF PLANT MATERIAL WITH THE OWNER'S REPRESENTATIVE.
5.IRRIGATION STATIONS/ZONES
5.1.EACH ZONE MUST BE DESIGNED TO ACHIEVE MATCHED PRECIPITATION RATES;
5.2.IRRIGATION ZONES MUST BE SEPARATED BASED ON HYDROZONE, WHICH CONSIDERS
IRRIGATION TYPE (E.G. OVERHEAD OR DRIP) AND PLANT WATER USE (E.G. LOW, MEDIUM,
OR HIGH);
5.3.STATIONS THAT IRRIGATE TREES CANNOT IRRIGATE OTHER PLANT TYPES. AN
INDIVIDUAL IRRIGATION STATION MAY IRRIGATE MORE THAN ONE TREE. THE
ESTABLISHED SIZE AND EXTENT OF THE ROOT ZONE MUST BE CONSIDERED WHEN
DESIGNING IRRIGATION FOR TREES. DRIP IRRIGATION, SUCH AS EMITTERS, ROOT
WATERING SYSTEMS, OR BUBBLERS, MUST BE USED TO IRRIGATE TREES.
5.4.EACH IRRIGATION ZONE MUST BE DESIGNED TO PREVENT RUNOFF, OVERSPRAY, OR
OTHER SIMILAR CONDITIONS; AND
5.5.STATIONS MUST BE DESIGNED TO ACHIEVE THE HIGHEST POSSIBLE DISTRIBUTION
UNIFORMITY USING THE MANUFACTURER’S RECOMMENDATIONS.
6.SYSTEM
6.1.VALVE BOXES
6.1.1.MUST BE INSTALLED IN A MANNER THAT PREVENT BREAKS AND MUST EASILY BE
ACCESSIBLE FOR REPAIRS.
6.1.2.ALL VALVE BOXES SHALL BE INSTALLED A MINIMUM OF 2'-0" FROM THE EDGE OF
PAVED SURFACES AND 3'-0" FROM THE CENTERLINE OF DRAINAGE SWALES. THE
LANDSCAPE CONTRACTOR SHALL ADJUST ALL VALVE BOXES TO FINISH GRADE.
6.1.3.ALL VALVE BOXES / LIDS SHALL BE PER THE CONSTRUCTION DETAILS WITH
LOCKING LIDS AND COLOR TO BE GREEN.
6.2.ALL IRRIGATION LINES AND EQUIPMENT SHALL BE FIELD ADJUSTED AS NEEDED TO
AVOID EXISTING AND PROPOSED UTILITIES, EXISTING PRESERVED VEGETATION, AND
OTHER CONFLICTING FIELD CONDITIONS.
6.3.PLANT MATERIAL LOCATIONS SHALL HAVE PRECEDENCE OVER IRRIGATION MAINLINE
AND LATERAL LOCATIONS. COORDINATE INSTALLATION OF IRRIGATION EQUIPMENT SO
THAT IT DOES NOT INTERFERE WITH THE PLANTING OF TREES OR OTHER LANDSCAPE
MATERIAL.
6.4.IRRIGATION PIPE INSTALLED UNDER HARDSCAPE SURFACES MUST BE SLEEVED WITH A
RIGID PIPE 1 INCH LARGER THAN THE PIPE WITHIN IT, AT A MINIMUM. IRRIGATION LINES
AND AND CONTROL WIRES SHALL BE INSTALLED IN SEPARATE SLEEVE.
6.5.OPERATING PRESSURE OF THE IRRIGATION SYSTEM MUST MEET MANUFACTURER’S
RECOMMENDED OPERATING PRESSURE. A) PRESSURE-REGULATING DEVICES MUST BE
INSTALLED TO ENSURE PROPER OPERATION. THIS MAY BE ACCOMPLISHED BY USING
PRESSURE REGULATORS AT THE ZONE VALVE OR INTEGRATED INTO THE SPRINKLER
BODY. SPRINKLER BODIES WITH INTEGRATED PRESSURE REGULATORS ARE
ENCOURAGED. IF USING SPRINKLER BODIES WITH INTEGRATED PRESSURE
REGULATORS, THE BOTTOM INLET MUST BE USED
6.6.A BOOSTER PUMP IS REQUIRED IF WATER PRESSURE IS BELOW THE REQUIRED
OPERATING PRESSURE.
6.7.A FLOW SENSOR AND MASTER VALVE ARE REQUIRED FOR SYSTEMS WITH MAINLINES
GREATER THAN OR EQUAL TO (>) 2 INCHES THAT ARE CONNECTED TO CITY MUNICIPAL
WATER. FLOW SENSORS MUST BE INSTALLED ACCORDING TO MANUFACTURER’S
SPECIFICATIONS AND TESTED FOR FUNCTIONALITY.
IRRIGATION SYSTEM REQUIREMENTSCOB LANDSCAPE AND IRRIGATION PERFORMANCE
AND DESIGN STANDARD MANUAL NOTES
IRRIGATION DESIGN
1.THE IRRIGATION WATER REQUIREMENT IS PROVIDED ON SHEET L602.
2.THE WATER SUPPLY IS COB MUNICIPAL WATER. POC 1 IS PRIVATE AND SERVES THE SUBDIVISION
BOULEVARD LANDSCAPING.
3.THE ASSUMED STATIC WATER PRESSURE IS 55 PSI.
4.AREAS IRRIGATED WITH OVERHEAD, DRIP AND TEMPORARY IRRIGATION ARE INDICATED ON THE
IRRIGATION PLANS.
5.STORMWATER DETENTION AREAS ARE EXEMPT FROM THE IRRIGATION PERFORMANCE
REQUIREMENTS AND ARE INDICATED ON THE PLANS.
6.SEE PLANS FOR ALL OTHER REQUIRED IRRIGATION COMPONENTS AND THEIR LOCATIONS.
1.TEMPORARY IRRIGATION IS AFFORDED A WATER DEMAND OF 2.3 GALLONS PER SQUARE FOOT
REGARDLESS OF PLANT TYPE.
2.TEMPORARY IRRIGATION WILL BE ACHIEVED THROUGH A PERMANENT UNDERGROUND
IRRIGATION SYSTEM THAT IS LATER DISABLED;
3.TEMPORARY IRRIGATION IS INTENDED FOR THE ESTABLISHMENT OF THE 15,784 SF OF SEED MIX
IN THE BOULEVARD STRIPS. ALL TEMPORARY OVERHEAD IRRIGATION WILL USE MULTI-SPRAY,
MULTI-TRAJECTORY ROTARY NOZZLES DESIGNED TO ACHIEVE HEAD TO HEAD COVERAGE;
3.1.THE TEMPORARY IRRIGATION ESTABLISHMENT PERIOD WILL BE 2 YEARS.
3.2.TEMPORARY WATER USE HAS BEEN INCLUDED IN THE WATER BUDGET CALCULATOR
4.INSTALL A TEMPORARY WATERPROOF SIGN IN A LOCATION VISIBLE FROM EACH ADJACENT
ROAD STATING THE FOLLOWING:
4.1.TEMPORARY IRRIGATION;
4.2.DATES OF THE TEMPORARY IRRIGATION;
4.3.CONTRACTOR’S CONTACT INFORMATION.
5.ALL TEMPORARY IRRIGATION SYSTEMS MUST BE DISABLED AT THE END OF THE
ESTABLISHMENT PERIOD.
TEMPORARY IRRIGATION
CONTACT: HAMPTON UZZELLECELL: 520.975.6713EMAIL: HAMPTON@VERDANTMT.COMSRX-IIProvidence DevelopmentBozeman, MTISSUEDATE#PRELIMINARY PLAT08/19/2024PRELIMINARY PLAT-2ND SUB11/01/2024PRELIMINARY PLAT-3RD SUB02/06/2025IRRIGATION
NOTES AND
CALCULATIONS
L602
IRRIGATION WATER REQUIREMENT