The following statement summarises current conditions in the Tay waterway between Bobs Lake and Port Elmsley.
December 14, 2020
Water levels in the Tay waterway between Bobs Lake and Port Elmsley have been unusually high due to rain in the Fall and then melting snow in early December. The obvious exception is Bobs Lake, where levels have been held consistently at ‘normal’ (that is, the historic average) since July, despite increased flow from one main source, Eagle Lake.
Christie Lake on the other hand, just below Bobs Lake, has been at the historic maximum levels since August, dipping only briefly in November before returning to maximum this month. Immediately downstream from there, levels are close to the highs experienced last spring (and, also, the unusual January flood). This is the same just above Perth.
The flow into Perth has usually been above historic average since August, and on December 13th was 40% above historic average. This should reduce with the colder weather arriving in mid-December, however, as noted above, there remains a substantial amount of water upstream.
Below Perth, Port Elmsley level (124.11m) is the highest since spring (124.37m) and last January flood (124.33m) Note: the readings are metres above sea level.
September 1, 2020
Following the major rainfall on August 29th, water levels and flow in most areas of the waterway again increased, with the biggest impact at Perth (flow increased from 6.7cms to over 9. The historic average is 4.9). Bobs Lake level moved above its historic average but is well below its 'maximum'. Eagle Lake had increased substantially but is trending down. Christie Lake continues to increase, above its maximum. Downstream from Christie Lake, including Perth and below, levels remain high; at many locations just below spring peaks.
August 28, 2020
As anticipated, water levels and flow along the waterway have continued to drop following the substantial rain and resultant increases earlier in August. In particular, Bobs Lake and Christie Lake have dropped considerably, but Christie Lake still remains above its historic maximum level. The level at Bobs Lake is slightly above the historic average. The flow at Perth is still high, at 6.8 cubic metres per second (cms), which is 50% above the historic average of 4.5 cms.
In the past, water levels along the Tay waterway have dropped continuously from early fall.
For current and recent water levels and flows at selected sites on the waterway, see the links to electronic gauges below.
* Qualification of Statements:
This statement is based on information provided by the association's network of 'Tay Net' reporters and by data on the
Rideau Valley Conservation Authority
Because online flow data was withdrawn for the Bolingbroke Dam in 2018 by Parks Canada, and waterway conditions can change rapidly, the association is unable to take responsibility for the accuracy of the data and statements.
Click here for a description of the Tay Net Waterway Reporting Program.