Water Quantity Monitoring

The following graphs provides information about water levels in the Arrowsmith Dam Lake as well as water levels and discharge rates for the Englishman River. The Arrowsmith Dam Lake is monitored remotely by a transducer, and weekly by manual measurements. The trandsucer is located at Level 0.00 m and the 'top of the spillway' is at Level 27 m. If the bottom of the lake is V-shaped, the water level drop should start accelerating whenever the area does not receive sufficient precipitation. Official information for the Arrowsmith Dam can be obtained from the Arrowsmith Water Service's web site. [Download the pdf file for the actual readings.]

The remaining graphs which follow show the monthly readings for the Englishman River as well as a year-to-date graph (last graph). Official data for the Englishman River can be viewed at the Environment Canada web site. [To see the graph, select 'British Columbia' for the province, the station name or number, then choose the parameters of interest.] Please note that as of August 12, 2004, the target discharge level was lowered from 1.6 to 1.2 m³/s. We believe that the levels were lowered because the target discharge rate of 1.6 m³/s could not be sustained.

Arrowsmith Dam Lake Water Levels

Englishman River Water Level and Discharge Rates
January - December 31, 2006

Additional Data   (Note: For pdf documents, please adjust your viewer until the desired viewing size is achieved.)

• Englishman River 2004 Graph of Minimum Daily Discharge Rates (June 26 - Oct 8)
• 2003 - 2004 Comparison Graph
• 2004 Data Table (same as above, but includes dates with readings above mandated levels)
• Reservoir Readings - 2004
• Observation Well Information (see especially Well Numbers 304 and 314 but note that this information has not been updated by the BC government for many years now.)
• Englishman River Discharge Rate (Env. Canada)
• Arrowsmith Water Service