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HomeMy WebLinkAbout003 21288_WC_Recommendations_Boulder Creek Apartments Phase 2_CONR20 E. Olive, PO Box 1230, Bozeman, MT 59771 P: 406-582-3220 www.bozemanwater.com Water Conservation DRC Comments Ali Chipouras – achipouras@bozeman.net Water Conservation Technician August 11, 2021 Boulder Creek Apartments Phase 2 – Landscape and Irrigation Conceptual Plan Advisory Comments The Water Conservation Division strives to promote outdoor water-use efficiency and best practice of landscape and irrigation installations. The following best practice recommendations to the Boulder Creek Apartments Phase 2 conceptual plan are provided to guide the project towards maximizing landscape health and resiliency while minimizing outdoor water consumption. Adhering to these recommendations is not required to receive plan approval. 1.The landscape design plan should indicate the total landscaped area (ft2) and landscaped area of all turf grass areas. See irrigation calculations 2.Each hydrozone should be on a separate irrigation zone based on the vegetation’s water demand. Grouping plants with similar watering needs will reduce over or under watering the vegetation Noted 3.Drought tolerant and water-wise landscaping can use approximately 75% less irrigation water than turf grass. The plant schedule should maximize the installation of drought tolerant landscaping and minimize the use of Kentucky bluegrass and overhead sprays, especially within areas surrounded by pavement (such as boulevards and parking lot medians). It is recommended to install native seed mix and/or drought tolerant plants/shrubs in these areas. All parking lot islands are planted with drought tolerant trees and shrubs 4.Landscape plans should include topsoil depth specification of 4”- 6” (after grading) to allow for proper root depth growth and assist with plant and turf grass resiliency. See Notes 5.Specify that perennials, shrubs, and trees will be irrigated using low flow drip irrigation technology that will directly target the roots. Drip irrigation uses approximately 75% less water when compared to overhead spray irrigation. See Irrigation Notes 6.Multi-spray, multi-trajectory (rotary) nozzles can reduce water loss from evaporation and wind drift by up to 50%. Specify the installation of water efficient sprinkler nozzles (multi-spray, multi-trajectory nozzles or ‘rotary nozzles’) if overhead irrigation is to be used within turf grass lawn areas. To save money and water - check out the City’s sprinkler nozzle rebates for new construction! See Irrigation Notes 7.When programmed properly, weather based irrigation controllers can reduce outdoor water use by 25%. Specify the installation of a weather based irrigation controller that can automatically adjust the watering schedule according to local weather events. To save money and water - check out the City’s WaterSense® weather based irrigation controller rebates for new construction! See Irrigation Notes 8. 20 E. Olive, PO Box 1230, Bozeman, MT 59771 P: 406-582-3220 www.bozemanwater.com 9.Rain sensors can reduce outdoor water use by approximately 10%! Specify the installation of a rain/freeze sensor, which overrides and turns off the irrigation system when a certain amount of rain has fallen. When the sensor dries, it opens the connection to allow the system to resume normal operations. To save money and water - check out the City’s rain sensor rebates for new construction! See Irrigation Notes 10.Overhead sprinkler heads should be installed upright in the ground and ~2”-4” from any paved surface, especially curbs, to minimize sprinkler head damage from snowplows and lawn care equipment. This will also help to minimize future pavement obstruction of the sprinkler head which can occur as the ground settles over time. Noted 11.After installation, sprinkler heads should be adjusted to throw the proper distance and direction in order to minimize water waste via run-off and achieve head-to-head coverage. See Irrigation Notes