Ontario Power Generation Inc. - Permit to take water

This proposal is for an amendment to Permit to Take Water No. 0776-D3PFY2 for Ontario Power Generation Inc. Water will be taken from eleven 11 wells for construction dewatering purposes, located in the Town of Bowmanville, Ontario.

The proposed amendment includes the addition of five wells (sandpoints). Details of the water taking are as follows:

Permit type – amendment

Source Name: Underground Servicing Trench

• purpose: construction dewatering
• maximum rate per minute (litres): 140
• maximum number of hours of taking per day: 24
• maximum volume per day (litres): 202,000
• maximum number of days of taking per year: 364
• period of taking: January 1 to December 31 for three years

Source Name: Building Footing

• purpose: construction dewatering
• maximum rate per minute (litres): 36
• maximum number of hours of taking per day: 24
• maximum volume per day (litres): 52,000
• maximum number of days of taking per year: 364
• period of taking: January 1 to December 31 for three years

Source Name: SMR 1 Overburden Excavation

• purpose: construction dewatering
• maximum rate per minute (litres): 180
• maximum number of hours of taking per day: 24
• maximum volume per day (litres): 260,000
• maximum number of days of taking per year: 364
• period of taking: January 1 to December 31 for three years

Source Name: SMR 1 Shaft Excavation

• purpose: construction dewatering
• maximum rate per minute (litres): 250
• maximum number of hours of taking per day: 24
• maximum volume per day (litres): 360,000
• maximum number of days of taking per year: 364
• period of taking: January 1 to December 31 for three years

Source Name: CCW Outfall Shaft Excavation

• purpose: construction dewatering
• maximum rate per minute (litres): 375
• maximum number of hours of taking per day: 24
• maximum volume per day (litres): 540,000
• maximum number of days of taking per year: 364
• period of taking: January 1 to December 31 for three years

Source Name: Forebay/ CCW Intake Shaft Excavation

• purpose: construction dewatering
• maximum rate per minute (litres): 333
• maximum number of hours of taking per day: 24
• maximum volume per day (litres): 480,000
• maximum number of days of taking per year: 364
• period of taking: January 1 to December 31 for three years

Source Name: Cooling Water System Trench

• purpose: construction dewatering
• maximum rate per minute (litres): 280
• maximum number of hours of taking per day: 24
• maximum volume per day (litres): 404,000
• maximum number of days of taking per year: 364
• period of taking: January 1 to December 31 for three years

Source Name: SMR 2, 3 and 4 Shafts

• purpose: construction dewatering
• maximum rate per minute (litres): 309
• maximum number of hours of taking per day: 24
• maximum volume per day (litres): 446,000
• maximum number of days of taking per year: 364
• period of taking: January 1 to December 31 for three years

Source Name: Transmission Towers Caissons

• purpose: construction dewatering
• maximum rate per minute (litres): 66
• maximum number of hours of taking per day: 24
• maximum volume per day (litres): 96,000
• maximum number of days of taking per year: 364
• period of taking: January 1 to December 31 for three years

Source Name: Bridge Structure Caissons

• purpose: construction dewatering
• maximum rate per minute (litres): 250
• maximum number of hours of taking per day: 24
• maximum volume per day (litres): 360,000
• maximum number of days of taking per year: 364
• period of taking: January 1 to December 31 for three years

Source Name: Caissons for Powerhouse Structures

• purpose: construction dewatering
• maximum rate per minute (litres): 267
• maximum number of hours of taking per day: 24
• maximum volume per day (litres): 385,000
• maximum number of days of taking per year: 364
• period of taking: January 1 to December 31 for three years

There are 3 categories of a Permit to Take Water:

• Category 1: water takings are anticipated to have a lower risk of causing an unacceptable environmental impact/interference
• Category 2: water takings are anticipated to having a higher potential of causing unacceptable environmental impact or interference
• Category 3: water takings are anticipated to have the highest potential of causing unacceptable environmental impactor interference

The proposed water taking qualifies as a Category 3 permit.