Today, with all siphons flowing, the lake level is 2.3 feet below the spillway ramp and descending. The lake froze completely on December 20th with ice up to three inches thick and 80% of the lake was melted by January 7th, allowing for a much cleaner fifth and final descent to target depth. If we are lucky, the lake will again freeze in January when the siphons shut down with lake level at three feet below the spillway. Continue reading
Tag Archives: drawdown
Drawdown: Report 11A
Update to the Report 11 including more rainfall data for December 2019. Continue reading
Drawdown: Report 11
Summary: This four-week report involved so many environmental changes that I had to wait to complete it until a break in the weather – the dry spell we’re experiencing – now in its third day. We received so much rain this month that the lake level rose 38 inches after receiving five inches of rain and Snow/Ice Water Equivalent (SWE), even with all siphons flowing much of that time. Continue reading
Drawdown: Report 10
The 6†siphon continued flowing during this last two week period and we requested that P&LC restart both 12″ siphons.
On Wednesday 11/20, a Lake Planning Group Meeting was held with John Bergstrom, Robert & Susan Brown, Rob Cummings, Sue Enos, Scot Evans, Lara Gorton, Stephen Macaluso, and Harold Ossher attending. Continue reading
Drawdown: Aerial Survey Lake Perimeter
A friend lent me his drone for an aerial survey of the lake as it is now during the drawdown. I have posted below some of the photos from November 15 when the lake was half frozen on the surface. … Continue reading
Drawdown: Report 9
Summary: Both 12″ siphons shut down: the west 12†on Tuesday night 11/5/19 and the east 12†on Wednesday night 11/6/19. The 6†siphon was the only one flowing most of this week and it was able maintain the lake level following 0.3″ rainfall with a 2 ½” lake level rise. Lake Gauge started at -3.0′ target depth and ended the week rising to -2.8′. Continue reading
Drawdown: Report 8
Summary: Harold Ossher’s conclusion, following his evaluation of watershed research and flow data collected, was to use two 12†siphons plus the one prototype 6†siphon. This proved sufficient to stay ahead of this year’s wet October 8.2†rainfall total. (Average rainfall for October over the last three years is 7.7″ where OCT 2018 was 4.6†and OCT 2017 was 10.3″.) Continue reading
Drawdown: Report 7
Summary: Sunday 10/27/19 brought us the remnants of Tropical Storm OLGA, where we received 1.34 inches of rain in the twelve hours between 4 am and 4 pm. (more…) Continue reading
Drawdown: Report 6
Rain from the strong nor’easter bombogenesis (at least 24 millibar drop within 24 hours) began at 2 pm Wednesday 10/16/19 and ended just after midnight where we received 3.34â€of rain. On Thursday 10/17/19, we received a small amount of wrap-around moisture with an additional 0.04†or rain. (more…) Continue reading
Drawdown: Report 5
During the last 9 days, we received 1.03 inches of rain which was mostly absorbed by the dry ground of West Mountain and surrounding area with little inflow from the Boway Stream: (more…) Continue reading