OUTSIDE THE STOVEPIPEONE COMMUNITY’S SOLUTION TO INCLUDING WELL

HEAD PROTECTION IN PLANNING AND ZONING DECISIONS

MINNESOTA RURAL WATER ASSOCIATIONTECHNCIAL CONFERENCE

MARCH 4, 2020

IT’S JUST WATER, RIGHT?

RICK WAHLENCITY OF EDEN PRAIRIE

MANAGER OF UTILITIESPhone: 952-294-5908

Email: rwahlen@edenprairie.org

WELLHEAD PROTECTION PLANIS EVERYONE’S BUSINESS

• EDEN PRAIRIE WATER SYSTEM OVERVIEW• EDEN PRAIRIE’S WELLS• QUICK GEOLOGY LESSON• WELLHEAD PROTECTION PLAN PROCESS• CURRENT AND FUTURE PROTECTION AREAS• NEXT STEPS• CHALLENGES WITH LOCAL PLANNING• BUILDING CONSENSUS INTERNALLY• QUESTIONS

UTILITY DIVISION ORGANIZATION OF ASSETS

• WATER• SUPPLY• TREATMENT• STORAGE• DISTRIBUTION

• WASTEWATER COLLECTION

• STORM WATER CONVEYANCE

UTILITY DIVISION ORGANIZATION OF ASSETS

• WATER• SUPPLY• TREATMENT• STORAGE• DISTRIBUTION

• WASTEWATER COLLECTION

• STORM WATER CONVEYANCE

PUBLIC WATER SYSTEM

• WATER SYSTEM($94 MILLION ORIGINAL COST)

15 WELLS28 MGD LIME SOFTENING TREATMENT PLANT3 WATER TOWERS (5 MG), PLANT RESERVOIRS (3.5 MG)327 MILES WATER MAIN4,000 FIRE HYDRANTS20,000 SERVICE CONNECTIONS

EDEN PRAIRIE’S WELLS

• 15 DEEP WELLS (AVERAGING 400 FEET) • FIRST WELL CONSTRUCTED IN 1971• PRAIRIE DU CHIEN – JORDAN AQUIFER• LOWER MINNESOTA RIVER WATERSHED

1,174,350 acres• MISSISSIPPI RIVER-TWIN CITIES WATERSHEDS

644,320 acres• LAKES, PONDS & STREAMS ARE INDEPENDENT

OF THE AQUIFER• DISCONTINUOUS CONFINING LAYER• RECHARGE BY LEAKAGE FROM OVERLYING

MATERIALS SINCE 1953• DESIGN CAPACITY OF 1500 gpm EACH• TOTAL APPROPRIATION OF 3,450 mgy

EDEN PRAIRIE’S SURFICIAL GEOLOGY

EDEN PRAIRIE’S BEDROCK GEOLOGY

WELLHEAD PROTECTION PLANPROCESS

• GOVERNED BY MN DEPT OF HEALTH (MDH)– MDH DIRECTS EACH UPDATE INDIVIDUALLY– CURRENTLY INDIVIDUAL RATHER THAN WHOLISTIC

• UPDATE EVERY 10 YEARS (OR UPON WELL ADDITION)– LAST WELL CONSTRUCTED 2010 – MDH DEFERRED PLAN UPDATE – TWO-PHASED UPDATE PROCESS

• PART 1 - DELINEATION OF WELL HEAD PROTECTION AREA• PART 2 - ACTION PLAN TO PROTECT THE PUBLIC WATER SUPPLY

WELLHEAD PROTECTION PLANPROCESS

• PART 1 COMPLETED OCTOBER 2012– DEFINITION OF THE DWSMA– CONCURRENCE OF LOCAL UNITS OF GOVERNMENT– PUBLIC MEETING

• PART 2 COMPLETION JULY 2015– MANAGEMENT STRATEGIES– 6 MONTH EXTENTION (JULY 2015)– CONCURRENCE OF LOCAL UNITS OF GOVERNMENT– PUBLIC HEARING– DEPARTMENT OF HEALTH APPROVAL

WELLHEAD PROTECTIONAREA

COMPARISON OFWELLHEAD PROTECTION AREAS

DWSMA VULNERABILITY

EMERGENCY RESPONSE AREA

BORDERING COMMUNITIES WITHIN DRINKING WATER SUPPLY MANAGEMENT AREA

POTENTIAL CLASS V WELL LOCATIONSPRIORITIZED WITHIN EXPANDED DWSMA

ACTIVE NON-MUNICIPAL WELLSPRIORITIZED WITHIN EXPANDED DWSMA

KNOWN RELEASE SITESPRIORITIZED WITHIN EXPANDED DWSMA

WHAT’S NEXT

• EVALUATE CLASS V WELLS (FLOOR DRAINS & SEPTIC SYSTEMS)• EVALUATE THE ESTABLISHMENT OF A WELLHEAD PROTECTION OVERLAY

DISTRICT• UNDERGROUND STORAGE TANK LAND USE PROVISIONS WITHIN ERA• COORDINATED SPILL RESPONSE PLAN REVIEW• EVALUATE STORMWATER RUNOFF WITH RESPECT TO INFILTRATION• CONTINUE TO RAISE PUBLIC AWARENESS IN HIGHLY VULNERABLE AREAS• RAISE WELL OWNER AWARENESS• PUBLIC EDUCATION• UPDATE POTENTIAL CONTAMINANT SITE INDEX ANNUALLY• PARTNER WITH MINNETONKA AND CHANHASSEN IN OVERLAPPING DWSMA• PLAN TO NOTIFY WELL OWNERS IF CONTAMINANTS ARE DISCOVERED

IT’S NOT JUST WATER, IS IT?

QUESTIONS?

RICK WAHLENCITY OF EDEN PRAIRIEMANAGER OF UTILTIESPhone: 952-294-5908

Email: rwahlen@edenprairie.org