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Home My WebLink About6.a. Water Efficiency and Stormwater Rebate Update EXECUTIVE SUMMARY Utility Commission Meeting: January 25, 2021 AGENDA ITEM: Water Efficiency & Stormwater Rebate AGENDA SECTION: Update Old Business PREPARED BY: Jessie Paque, Deputy Clerk/Office Specialist AGENDA NO. 6.a. Jane Byron, Stormwater Specialist ATTACHMENTS: Commercial Audit Report, Utility Billing APPROVED BY: BLE Insert RECOMMENDED ACTION: None Quarterly Water Efficiency Rebate Update: The City of Rosemount was awarded a Water Efficiency Grant from the Metropolitan Council (MCES) in the amount of $11,300. The city is required to match $3,770 and that has been funded from the Water Fund. As part of this program, the following rebate amounts are allowed:  $50 for Water Sense Toilets  $150 for Energy Star Washers  $150 for Water Sense Irrigation Controllers  $200 for Irrigation system audits Table 1 provides a summary of the entire rebate program activity, along with the city-funded rebate programs that were in place prior to the MCES Water Efficiency Grant in January 2020. Table 1 2018 2019 2020 Gallons of Water Saved Annually (est) 316,800 105,600 386,800 Total Rebate $4,853.82 $1,434.93 $4,971.67 Municipality Contribution (25%) $4,853.82 $1,434.93 $1,242.92 Irrigation Controllers Replaced: 31 12 35 Toilets Replaced: 3 0 6 Washers Replaced: 2 0 8 Audits (Residential): 0 0 1 Commercial Audit (billing not complete yet, report attached) It would be a partnership with the Vermillion River Watershed Joint 1 Powers Organization on their Urban Water Conservation Program. We plan to continue the partnership in 2021. C:\\Users\\jab\\AppData\\Local\\Temp\\6.a. Water Efficiency and Stormwater Rebate Update_632161\\6.a. Water Efficiency and Stormwater Rebate Update.docx Quarterly Stormwater Rebate Update: In May of 2019, the Utility Commission recommended City Council adopt a rebate program for residents to install projects on their property to improve stormwater quality and reduce runoff volume. In March 2020, City Council approved the Stormwater Rebate Policy and established a maximum amount of $5,000 for 2020. Table 2 provides a summary of the entire rebate program activity. Table 2 2020 Total Rebate $0 Rain Barrels: $0 Cisterns & Rainwater Harvesting: $0 Raingardens: $0 Native Plantings: $0 Buffers: $0 Stormwater Reuse: $0 Permeable Pavers & Pavements $0 Please note, only one application has been received for this program. The project was not approved because it was located in an easement next to a storm drain. However, further investigation shows that four residents are taking advantage of the SWCD Landscaping for Clean Water $250 installation grant. Landscaping for Clean Water grant recipients are provided with information on the Rosemount Stormwater Rebate. It appears as though residents are taking advantage of other complementary programs in 2020. Advertisement of the program was included in the utility insert that is going out with the Jan-March billing. The Dakota County Soil & Water Conservation District (SWCD) Landscaping for Clean Water Program (LFCW) is advertised in the utility insert. This is an education and grant program offered by the SWCD that informs residents on stormwater quality issues and projects, such as raingardens, that are also eligible for funding under the stormwater rebate. Information on the Rosemount Stormwater Rebate is included in the LFCW workshop materials. Staff will continue to publicize these programs via social media, city newsletters, staff updates and additional methods. 2 Commercial Site Assessment™ Tier II Prepared for: Claret Springs 15115 Cimarron Court Lakeville, MN 55068 2020 Season Proud Partner of 763.434.5414 twincities@conservairrigation.com conservairrigation.com Claret Springs 1 | P a g e Commercial Site Assessment™ Date of Tier I CSA: July 31st, 2020 Certified Technician: Garret Peterson, CLIA, CIT Date of Tier II CSA: July 31th, 2020 Certified Technician: Garret Peterson, CLIA, CIT Irrigated Acres: 5.46 Irrigated 𝑓𝑡2 : 237,718 Claret Springs 2 | P a g e Audit System Observations Irrigation system controller is a Hunter I-Core 30 zone max with 21 zones currently utilized. • Program A: Starts 10:00pm (stacked 3 times), even days, omitting Thursdays, including Zones – 1-11&18. • Program B: Starts 10:00pm (stacked 3 times), odd days, omitting Thursdays, including zones 12-21. Zone 18 running on even and odd days. • Cycle soak style of running setup for 3 cycles as noted by “stacking” 10:00pm start time. Controller has a wired HunterTM weather-based Sensor called Solar SyncTM. Controllers with Solar Sync receive weather data daily and adjust runtimes based on that and the regional July Evapotranspiration data. This makes the I-Core a Smart controller geared towards water savings. Almost all rotors in all zones had a 2.0 nozzle installed. Nozzles of rotors should change depending on area of coverage. For example, if a head covers 90° the nozzle will be a 1.0, a head covering 180° is a 2.0 nozzle, 270° head should be a 3.0, and so on. If all nozzles are the same and the heads turn at a fixed rate, then areas covered by a 90° head will get more water and those covered by a 360° head will get too little. Unfortunately, the “wrong nozzle sizing” heads will have to be completely new rotors since the model of rotor is older and the correct nozzles are no longer possible to acquire. There are also zones that have poor coverage/spacing. Spray zones along the boulevards are over spraying onto the road to make up for poor spacing and single line uniformity. An opposing zone and swapping nozzles on existing zones would provide better, more even, and efficient coverage. Zone 5 is a rotor zone that covers a turf island adjacent to parking spaces. The amount of water wasted on overspray to keep the small island turf watered is significant. I recommend reducing turf and changing to rotary nozzle sprays or eliminating turf on the island. There were some zones that could also use heads moved out of wooded areas, or to better spots for coverage. Lastly, there were many rotors that needed to have their position in the ground adjusted for proper coverage, ex. crooked, too low, too high, etc. Microclimates are mostly sun versus shade on this property. Sunny areas, especially by asphalt or other heat radiation need much more water than shady areas like under trees. This is not accounted for on this site for run times and/or design of zones. The easiest solution is to reduce nozzle size in shaded areas, and possibly increase in sunny areas. Claret Springs 3 | P a g e Water Rates: Meter Reading Interval: Monthly X Quarterly Other _______________ Units Measured As: X 1000 gallons CCF Converted Units: X 1 unit = 1000 gallons WATER RATES Tier 1 Tier 2 Tier 3 Tier 4 Price per unit (per 1,000 gals) $1.54 $1.94 $2.41 $3.62 Threshold 0-12,000 12,001- 24,000 24,001- 48,000 48,000 & over Sewer Rate per unit (if unmetered): - Historical Water Usage: *Current Water rates used for best comparison year to year and for future expectations. Water Usage Analysis Water use seems to be consistent around 1,900,000 to 2,000,000 gallons for the last four years. The grass root profile and health are doing well with this amount of watering. This is likely thanks to the smart control system. Though, as mentioned in the previous page, there is still room for improvement. Year Annual Water Usage (gallons) Annual Water Cost* 2016 1,795,000 $6,497.90 2017 1,904,000 $6,892.48 2018 2,472,000 $8,948.64 2019 1,922,000 $6,957.64 4 Year Average 2,023,250 $7,324.17 Claret Springs 4 | P a g e Water Budgeting Month 2016 Usage 2017 Usage 2018 Usage 2019 Usage Avg Usage Water Budget Jan-June 175,000 75,000 495,000 59,000 201,000 225,668 June-Sep 1,538,000 1,407,000 1,731,000 1,590,000 1,566,500 1,737,646 Sep-Dec 82,000 422,000 246,000 273,000 255,750 293369 Total(gal) 1,795,000 1,904,000 2,472,000 1,922,000 2,023,250 2,256,683 0 200,000 400,000 600,000 800,000 1,000,000 1,200,000 1,400,000 1,600,000 1,800,000 2,000,000 Jan-June June-Sep Sep-dec Yearly Water Usage Trends 2016 2017 2018 2019 Water Budget Claret Springs 5 | P a g e System Components: Water Source Deficiency? #1 Location Behind 15115 Cimarron Court Source City 2” Anti-syphon Brand Wilkins Zurn - 975XL Size 2” Inspection Date 6/2020 Visual Inspection Fair Condition, no leaks Deduct Meter Brand Census – T2 Size 2” Serial Number 71534452 Reading 17,667,691 Gallons Visual Inspection Like New Hydrometer Brand N/A Size N/A Master Valve N/A Visual Inspection N/A Notes: No Master Valve Claret Springs 6 | P a g e Recommend Critical Repairs and Adjustments Zones Head Type 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Total Total # Rotors 25 30 32 35 24 31 24 26 33 28 29 10 34 36 32 41 39 20 529 Total # Sprays 24 40 29 93 Rotating Nozzles Mini Rotors High Pop Rotors 6" Sprays 12" High Pop Sprays Mixed Head Types Zone GPM 58 60 80 60 70 50 60 60 78 56 64 74 70 52 50 20 74 78 74 76 54 - Repairs 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Total Damaged Rotors 1 1 1 1 1 5 Damaged 4" Sprays Damaged 6" Sprays Damaged High Pop Rotor Damaged High Pop Spray Line Leaks Wrong Nozzle Sizing 3 1 6 7 2 3 2 2 1 3 2 3 2 2 39 Damaged Nozzles Raise/Straighten Heads 3 2 4 3 1 6 2 3 3 5 3 5 5 2 47 Design Changes 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Total Move a head for better coverage 2 4 1 2 1 1 11 Cap unneeded head 4 1 5 Poor coverage/spacing X X X Claret Springs 7 | P a g e Completed Critical Repairs and Adjustments Repairs Price (each) Count Total R1.) Installed 5" Rotor $ 65.00 5 $ 325.00 R2.) Broken Nozzles $ 20.00 19 $ 380.00 R3.) Move Head (per foot) $ 15.00 11 heads for a total of 30’ $ 450.00 R4.) Cap Head/line $ 35.00 5 $ 175.00 $ 1,330.00 Recommended Efficiency Upgrades System Efficiency and Design Upgrades Price (each) Count Total U1.) Option 1 - EPA Water Sense spray heads phase out - pressure regulated and check valved spray heads with rotary nozzle $ 60.00 93 $ 5,580.00 U2.) Option 2 - Toro Precision™ Spray Nozzle Swap Out $ 20.00 93 $ 1,860.00 U3.) Option 3 - Hunter MP™ Rotary Nozzle Swap Out $ 25.00 93 $ 2,325.00 U4.) New rotors to replace the rotors with “wrong nozzle sizing” that do not match coverage area and are too old to just replace the nozzle $ 65.00 49 $ 3,185.00 U5.) Raise / Straighten Heads $ 15.00 47 $ 705.00 U6.) Add Zone $ 1,900.00 2 $ 3,800.00 $ 7,690.00 (without options 1-3 included) Claret Springs 8 | P a g e In summary, completing the recommended critical repairs and upgrades will result in substantially more efficient water usage and healthier plant material. Next Steps: □ Fix critical repair issues □ Upgrade all nozzles with High-Efficient Toro PSN™ Nozzles and/or Hunter MPTM rotary nozzles □ Update rotor nozzles/heads to match coverage areas □ Addressing coverage/spacing issues on boulevards □ Reduce or eliminate turf on parking island □ Annually maintain and monitor property $$ ARE YOU TAKING ADVANTAGE OF UTILITY REBATES $$ One time rebates are available to residents with Qualifying Projects Learn More: https://www.ci.rosemount.mn.us/736/7616/Home-and-Yard-Programs WATER  WaterSense Low Flow Toilets  Energy Star Washing Machines  WaterSense Irrigation Controllers  Irrigation System Audits ENERGY  Lighting  Appliances  Heating and Cooling  Energy Audits STORMWATER  Rain Barrels  Native Plant Gardens  Raingardens  Buffers $$ ARE YOU TAKING ADVANTAGE OF UTILITY REBATES $$ One time rebates are available to residents with Qualifying Projects Learn More: https://www.ci.rosemount.mn.us/736/7616/Home-and-Yard-Programs WATER  WaterSense Low Flow Toilets  Energy Star Washing Machines  WaterSense Irrigation Controllers  Irrigation System Audits ENERGY  Lighting  Appliances  Heating and Cooling  Energy Audits STORMWATER  Rain Barrels  Native Plant Gardens  Raingardens  Buffers $$ ARE YOU TAKING ADVANTAGE OF UTILITY REBATES $$ One time rebates are available to residents with Qualifying Projects Learn More: https://www.ci.rosemount.mn.us/736/7616/Home-and-Yard-Programs WATER  WaterSense Low Flow Toilets  Energy Star Washing Machines  WaterSense Irrigation Controllers  Irrigation System Audits ENERGY  Lighting  Appliances  Heating and Cooling  Energy Audits STORMWATER  Rain Barrels  Native Plant Gardens  Raingardens  Buffers Add Some To Your Yard Attend a FREE Landscaping for Clean Water class • see stunning examples of raingardens, pond buffers and native plant gardens • learn about their benefits to water, pollinators, and wildlife • see the potential for that problem area in your yard • learn about available grants • discover how easy and affordable it can be to make your yard the envy of the neighborhood All classes will be virtual in 2021! Registration Required www.dakotaswcd.org • swcd@co.dakota.mn.us • 651.480.7777 Add Some To Your Yard Attend a FREE Landscaping for Clean Water class • see stunning examples of raingardens, pond buffers and native plant gardens • learn about their benefits to water, pollinators, and wildlife • see the potential for that problem area in your yard • learn about available grants • discover how easy and affordable it can be to make your yard the envy of the neighborhood All classes will be virtual in 2021! Registration Required www.dakotaswcd.org • swcd@co.dakota.mn.us • 651.480.7777 Add Some To Your Yard Attend a FREE Landscaping for Clean Water class • see stunning examples of raingardens, pond buffers and native plant gardens • learn about their benefits to water, pollinators, and wildlife • see the potential for that problem area in your yard • learn about available grants • discover how easy and affordable it can be to make your yard the envy of the neighborhood All classes will be virtual in 2021! Registration Required www.dakotaswcd.org • swcd@co.dakota.mn.us • 651.480.7777