Reduce, Reuse, Replenish: Stormwater Re-use in the City of Hugo.. Bryan Bear City of Hugo

Transcription

1 Reduce, Reuse, Replenish: Stormwater Re-use in the City of Hugo. Bryan Bear City of Hugo

2 Current Situation

3 Current Regulatory Environment USGS study on White Bear Lake Implicate City Wells as at least partial cause for low water levels Unproven theory Lawsuit and Settlement Agreement DNR - Groundwater Management Area Study Met Council now encouraging use of River Water instead of Groundwater for Water Supply.

4 Current Regulatory Environment Groundwater Hugo has DNR Permit for Groundwater appropriation allows up to 650 million gallons/year (currently permitted) Use is only 400 MGY Separate plans for drinking water and storm water management Convert to surface water? re-use stormwater? conserve?

5 Runoff Leaving Hugo/Water Pumped from Municipal Wells (MG) Withdrawal Clearwater Creek Hardwood Creek Current Future Leaving Hugo (Annual) Directed to Bald Eagle Lake from Hugo (Annual) Permitted Groundwater Withdrawal (Annual)

6 Policy Options

7 Policy Options Infiltrate same volume of storm water that is pumped from Hugo s Municipal Wells? Increase use of storm water runoff for irrigation to reduce Groundwater volume pumped from Municipal Wells? Develop capital improvement program to facilitate increased use of storm water instead of City water for irrigation uses?

8 Policy Options Reduce, reuse, replenish Water conservation guidelines and incentives for new development Construct storm water distribution system and convert largest irrigation accounts to use storm water when feasible Incentive program for homeowners Adjust water conservation rates as necessary to promote good water stewardship practices

9 Policy Options Landscaping to reduce need for irrigation Water Audits Conservation Water Rates Sprinkling restrictions Soil monitoring irrigation sensors on city properties Incentives for good behavior Initiation of Rebate Program Commercial incentives Credits on WAC & SAC fees for innovative reuse, etc.

10 Policy Options Proposing revisions to development requirements Evaluation of storm water based irrigation systems Reduction of turf areas Landscaping ordinance Industrial Buildings Plumbing codes prohibits gray water reuse SAC & REC credits would be an incentive

11 Water Re-use Projects

12 Oneka Ridge Golf Course Joint Project Hugo, RCWD, BWSR, Oneka Ridge Golf Course Convert groundwater based irrigation system to stormwater based system Reduce groundwater pumping 32MG annually Infiltration Trenches 100 MG to 200 MG of stormwater infiltrated annually Water to be infiltrated/re-used for irrigation as part of Oneka Ridge Project: 65 MG/35 MG. Total: 100 MG (max estimate) Remove Phosphorous Construction Completed and now Operational

13 Oneka Ridge Golf Course

14 Hugo Water Usage 100 MG 225 MG 100 MG

15 3 Locations: Storm Water Irrigation Potential Projects Water s Edge Beaver Ponds CSAH 8 City Accounts MG/yr

16 Water s Edge Storm Water Irrigation Project Tributary Area (Acres) 931 Irrigation Area (Acres) Irrigation Usage (MG) 44.1 Potential RCWD Credit 1 /wk (MG) 83.6 Est. Storm Water Available (MG) 69.5 Est. % of RCWD Credit Available Est. % of 2012 Usage Available 83 % 100 %

17 Beaver Ponds Storm Water Irrigation Project Tributary Area (Acres) 200 Irrigation Area (Acres) 34 (parks) 26 (dev.) 2012 Irrigation Usage (MG) 5.7 Potential RCWD Credit 1 /wk (MG) 35.8 Est. Storm Water Available (MG) 21.1 Est. % of RCWD Credit Available Est. % of 2012 Usage Available 59 % 100 %

18 CSAH 8 City Accounts Storm Water Irrigation Project Tributary Area (Acres) 2,737 Irrigation Area (Acres) Irrigation Usage (MG) 5.4 Potential RCWD Credit 1 /wk (MG) Est. Storm Water Available (MG) Est. % of RCWD Credit Available Est. % of 2012 Usage Available % 100 %

19 Storm Water Irrigation Projects Considerations Treat it like a city utility Capital costs (est. $3 million) Likely Paid by City Annual maintenance Likely a City responsibility City Ownership Sell stormwater to Homeowners Association Recover Capital, O&M Costs

20 Costs What if the cost is higher than $2.65/1,000 gallons? current irrigation rate? No Deal? HOA will never agree to pay more. City subsidy? Other ratepayers to subsidize? Jack up irrigation rates? Lost revenue to Water Fund.

21 Require it? In all new developments???? Seperate set of pipes carrying stormwater serving each home. Commercial vs. Residential Single-Family is harder than Multi-family. Size of the development matters Controls. Master Control vs individual control HOA or no HOA? Health Concerns. Who drinks out of the garden hose?

22 Summary Reduce pumping by MG annually Reuse MG of stormwater Replenish the aquifer Remove up to 800 pounds of phosphorus annually Add capacity for future growth How to recover lost revenue? Other cost factors?

23 Questions/Comments?