FLOODWAY EXPANSION GROUNDWATER ACTION RESPONSE PLAN

ManitobaFloodway AuthorityManitobaFloodway Authority

FLOODWAY EXPANSION FLOODWAY EXPANSION GROUNDWATER ACTION RESPONSE GROUNDWATER ACTION RESPONSE

PLAN PLAN

1. OVERVIEW1. OVERVIEW

• GROUNDWATER IS A TOP PRIORITYGROUNDWATER IS A TOP PRIORITY

• DESIGN IS TO WIDEN THE CHANNEL NOT DEEPEN, DESIGN IS TO WIDEN THE CHANNEL NOT DEEPEN, TO MINIMIZE ANY GROUNDWATER IMPACTS TO MINIMIZE ANY GROUNDWATER IMPACTS

• MONITORING IS ONGOING ALONG CHANNELMONITORING IS ONGOING ALONG CHANNEL

• CARBONATE BEDROCK AQUIFERCARBONATE BEDROCK AQUIFER– GROUNDWATER CONFINED BY OVERLYING CLAY GROUNDWATER CONFINED BY OVERLYING CLAY

– WATER LEVEL PRESSURE IN BEDROCK ABOVE CHANNEL BOTTOMWATER LEVEL PRESSURE IN BEDROCK ABOVE CHANNEL BOTTOM


2. CONSTRUCTION REQUIREMENTS2. CONSTRUCTION REQUIREMENTS

• TEMPORARILY LOWER OR DRAWDOWN WATER LEVEL TEMPORARILY LOWER OR DRAWDOWN WATER LEVEL LOCALLY TO INSTALL BRIDGE FOUNDATIONSLOCALLY TO INSTALL BRIDGE FOUNDATIONS

• TO FACILITATE CONSTRUCTION, WATER MUST BE TO FACILITATE CONSTRUCTION, WATER MUST BE REMOVED FROM THE EXCAVATIONSREMOVED FROM THE EXCAVATIONS

3. REASON FOR TEMPORARY DRAWDOWN3. REASON FOR TEMPORARY DRAWDOWN

• TO PREVENT GROUNDWATER SEEPAGE INTO THE TO PREVENT GROUNDWATER SEEPAGE INTO THE EXCAVATIONEXCAVATION


4. EXPECTED IMPACTS4. EXPECTED IMPACTS

• GROUNDWATER DRAWDOWN WORK IS ANTICIPATED FOR GROUNDWATER DRAWDOWN WORK IS ANTICIPATED FOR APPROXIMATELY 2 TO 3 MONTHS, STARTING IN NOVEMBER, APPROXIMATELY 2 TO 3 MONTHS, STARTING IN NOVEMBER, 2005 AND IN FALL, 2006 2005 AND IN FALL, 2006 (HWY. BRIDGE 59S).(HWY. BRIDGE 59S).

• LOCAL DRAWDOWN FOR CENTRAL BRIDGE PILES WILL EXTEND LOCAL DRAWDOWN FOR CENTRAL BRIDGE PILES WILL EXTEND OUTWARD BEYOND BRIDGE.OUTWARD BEYOND BRIDGE.

• TEMPORARY DRAWDOWN ESTIMATED TO BE 1.5 M OR LESS AT TEMPORARY DRAWDOWN ESTIMATED TO BE 1.5 M OR LESS AT CLOSEST DOMESTIC WELLS. CLOSEST DOMESTIC WELLS.

• MOST SUBMERSIBLE PUMPS SET WELL BELOW OPERATING MOST SUBMERSIBLE PUMPS SET WELL BELOW OPERATING LEVEL FOR DRY SEASONS, AND CAN HANDLE 1.5 M ADDITIONAL LEVEL FOR DRY SEASONS, AND CAN HANDLE 1.5 M ADDITIONAL DRAWDOWN.DRAWDOWN.

• SLIGHT RISK FOR A FEW PUMPS TO GO TEMPORARILY DRY - SLIGHT RISK FOR A FEW PUMPS TO GO TEMPORARILY DRY - MFA TO MITIGATE.MFA TO MITIGATE.


5. MITIGATION OPTIONS5. MITIGATION OPTIONS

• MFA MAY DELIVER POTABLE WATERMFA MAY DELIVER POTABLE WATER

• MFA MAY LOWER RESIDENT’S PUMP DEPTHMFA MAY LOWER RESIDENT’S PUMP DEPTH

• MFA MAY MODIFY CONSTRUCTION PROCEDURESMFA MAY MODIFY CONSTRUCTION PROCEDURES

• OTHER (SUGGESTIONS FROM THE PUBLIC?)OTHER (SUGGESTIONS FROM THE PUBLIC?)


EXISTINGGROUNDWATERSURFACE

(TYP)

SEASONALGROUNDWATERFLUCTUATION

TEMPORARYDRAWDOWN

DOMESTICWELLDRAWDOWN(PUMP ON)


GROUNDWATER ACTION GROUNDWATER ACTION RESPONSE PLANRESPONSE PLAN

RESIDENT ACTIONRESIDENT ACTION

COMPLAINT RECEIVED BY MFA FROM RESIDENT COMPLAINT RECEIVED BY MFA FROM RESIDENT ADJACENT TO PROJECT DRAWDOWN ACTIVITIESADJACENT TO PROJECT DRAWDOWN ACTIVITIES

MFA CONTACTMFA CONTACT

– Toll Free Telephone Toll Free Telephone 1-877-456-12011-877-456-1201


PROPOSED MFA ACTIONPROPOSED MFA ACTION

1. PRELIMINARY SCREENING1. PRELIMINARY SCREENING

• DISCUSS WITH RESIDENT WITHIN 1 HOUR OF DISCUSS WITH RESIDENT WITHIN 1 HOUR OF COMPLAINT RECEIPTCOMPLAINT RECEIPT

• INTERFERENCE MAY HAVE OCCURRED:INTERFERENCE MAY HAVE OCCURRED:

– MFA Provides Potable WaterMFA Provides Potable Water

– Determine Action PlanDetermine Action Plan


PROPOSED RESPONSE PROCEDURESPROPOSED RESPONSE PROCEDURES

2. SECONDARY WELL ASSESSMENT2. SECONDARY WELL ASSESSMENT

• MFA ONSITE TIMELY ASSESSMENT AS ARRANGED WITH MFA ONSITE TIMELY ASSESSMENT AS ARRANGED WITH RESIDENT RESIDENT

3. MFA POSSIBLE MITIGATION ACTIONS:3. MFA POSSIBLE MITIGATION ACTIONS:

• CONTINUE WATER DELIVERYCONTINUE WATER DELIVERY

• LOWER OWNER’S PUMPLOWER OWNER’S PUMP

• MODIFY PROJECT PUMPING AND DRAWDOWNMODIFY PROJECT PUMPING AND DRAWDOWN

• OTHER (SUGGESTIONS FROM THE PUBLIC?)OTHER (SUGGESTIONS FROM THE PUBLIC?)


4. PROPOSED DOCUMENTATION & NOTIFICATION4. PROPOSED DOCUMENTATION & NOTIFICATION

• PREPARE INCIDENT REPORT FOR REGULATORSPREPARE INCIDENT REPORT FOR REGULATORS

– LOCATION OF COMPLAINTLOCATION OF COMPLAINT

– INVESTIGATIONS AND RESULTSINVESTIGATIONS AND RESULTS

– ACTIONS TAKENACTIONS TAKEN

• MFA WILL NOTIFY MANITOBA WATER STEWARDSHIP MFA WILL NOTIFY MANITOBA WATER STEWARDSHIP (MWS), WATER LICENSING BRANCH, MANITOBA (MWS), WATER LICENSING BRANCH, MANITOBA CONSERVATION AND FEDERAL RESPONSIBLE CONSERVATION AND FEDERAL RESPONSIBLE AUTHORITIES (PHONE AND E-MAIL)AUTHORITIES (PHONE AND E-MAIL)

• MFA WILL SUBMIT INCIDENT REPORT TO MWS MFA WILL SUBMIT INCIDENT REPORT TO MWS WITHIN 1 WEEK OF ASSESSMENT WITHIN 1 WEEK OF ASSESSMENT


5. ONGOING PLAN IMPROVEMENTS5. ONGOING PLAN IMPROVEMENTS

• GROUNDWATER ACTION PLAN WILL BE AMENDED TO GROUNDWATER ACTION PLAN WILL BE AMENDED TO IMPROVE RESPONSE AS REQUIRED.IMPROVE RESPONSE AS REQUIRED.

FLOODWAY EXPANSION GROUNDWATER ACTION RESPONSE PLAN

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