Freedom — August 30, 2011 — Yes, Ossipee Lake did flood as a result of Tropical storm Irene and the level continues to go up. On Broad Bay, the rain started Saturday evening (8/27) and continued until about noon on Sunday – about 4.1″ of rain. Then the wind picked up and lasted until about noon today (Monday). Our area appears to be free of wind damage. I did try to get to the dam around 6 p.m. Monday but the road just off Rt. 153 was closed by a wire being down and a barrier on the road.
As of Monday evening the official lake level (on the big lake) is 409.25 – 2 ft. over summer level. All indications are for increased elevation during the next day or two. There is a good chance of 410 ft. or higher. Based on flow rates I believe the dam continues to be wide open.
Some history of where the reported level has been:
8/25 – Thursday – 5 p.m. – 407.25′ – normal summer level
8/28 – Sunday – 6 a.m. – 406.3′ – lowest level before the storm (61 hours to bring the level down by using a managed opening of the dam to avoid navigation problems if the rain did not come as predicted.)
8/29 – Sunday – 1 a.m. – 407.25′ – back to summer level in 19 hours with the dam wide open
8/29 – Sunday – 7 a.m. – 408.25′ – Up one foot in 6 hours
8/29 – Sunday – 9 p.m. – 409.25 – Up another foot in 14 hours
Inflow from the Bearcamp reached 5,421 cfs 8 p.m. on Sunday. This is about as high as I remember in the last ten years. The flow droped to 1,345 Monday evening but is high enough to continue raising the lake.
Looks like the estimate of one foot increase in lake level for each inch of widespread rain is going to hold true for this storm.