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11-06-2018, 08:48 AM | #1 |
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Lake level Nov 2018
Lake level is at 504.38 !!!!!! Over full lake. The rain this fall is raising havoc with the dam bureau's "best laid plans".
Dave
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11-06-2018, 08:59 AM | #2 |
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My lake, Waukewan, is over full also and they can't drain it down because Winni is full. My dock was still in as of this past weekend and it was almost under water.
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11-06-2018, 10:51 AM | #3 | |
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As rain is forecast to continue, are properties on the lake at risk of flooding? |
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11-06-2018, 11:47 AM | #4 |
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510
I interpret that to mean 510.32. The lake is full at 504, flood risk starts 6" above that at 510. I recall several instances where the lake was way over full, but no significant flooding was reported. I also remember stories of hurricane Carol in 1954 where the lake was so overfull that boats in boathouses had to be partially sunk to get them out so the cabins, masts etc would not hit the roof damaging both boat and boathouse.
At this point, everything is full, up and downstream, I think. And the watershed is saturated, so a little more rain could raise the lake level more than a little. Last edited by Descant; 11-06-2018 at 02:48 PM. Reason: corrected typos |
11-06-2018, 12:31 PM | #5 |
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"Twenty years ago, in 1985, the Army Corps identified 1,158 residences and 115 businesses at risk on the four lakes, two-thirds of them on Lake Winnipesaukee, where flood damage begins to occur when the lake is six inches above "full" at 504.32 feet above sea level."
A 6 inch increase from full at 504.32 equals 504.82 at which point flood damage is reported to begin. Every .10 increase equals 1.2 inches. 510.32 is equal to a 6 foot increase from full lake, and time to build the Ark. Cobalt |
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11-06-2018, 02:31 PM | #6 |
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For some historical data:
"Listed below is a brief description of how the reservoirs are operated and managed from Lake Winnipesaukee to the stream gaging station site on the Winnipesaukee River in Tilton. All elevations referenced are based upon the NGVD datum. Lake Winnipesaukee: Highs: June 1984 505.89 June 1998 505.53 October 2005 505.25 Lows: Nov. 2001 501.86" [From Echo Shores Website] I remember pipe docks being pulled out of the lake bed and floating around with the boat still tied to the dock. You need good cleats on the dock and boat and strong lines for that to happen. The water was above my knees when standing on my dock. Filled garbage cans with water and put on the dock; not sure how effective that was, but no damage. In July of 1998, the entire lake was a no wake zone for a week or so as I recall. |
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11-06-2018, 10:25 PM | #7 | |
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After the first day or so with the docks completely submerged (and the weight on top) they more or less got waterlogged and stopped pulling upward. When the water went down, it was like nothing happened. Obviously the boats were taken out before hand. |
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11-06-2018, 02:51 PM | #8 | |
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11-06-2018, 05:09 PM | #9 |
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Being that the water levels are so high, why, is the level of Winnisquam so extremely low. Was past on the last trip from the lake and I don't think I've ever seem Winnisquam at this level. Off to California.
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11-06-2018, 05:34 PM | #10 |
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1 in equals .083 ft
When I kept my boat at Parker's in Alton Bay, because of bridge clearance issues with my boat, I used .083 foot as 1 inch.
For my boat, I could not comfortably get under the bridge with a lake level around 504.60 or so, which was just under 4 inches above full lake. Dave
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11-06-2018, 06:25 PM | #11 |
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At least part of the problem is because the dam outflow has been at minimal levels for the last two weeks of October, probably to allow some scheduled work downstream. It's been fairly wet recently so water in but little water out. Dam outflow was increased as November started and is now at 1000 CFS which is the highest it has been since at least early July when Bizer shows it was at 621 CFS and then dropped into the 200's CFS until now. The 1000 CFS is enough to drop the level an inch every couple days, not counting new inflow from rain. That could take about 3 weeks to drop the lake about a foot, again not accounting for new rainfall.
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11-06-2018, 08:56 PM | #12 | |
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Kinda been this way for years ............ ? I think. |
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11-07-2018, 12:28 PM | #13 | |
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They are doing a great job with the Dams, over the last few years... in the 80s 90s and 2000s they let the lake get to low late in the season... The last few years they haven't done that as much... As such there is a greater chance of hitting full lake during the draw down period. Personally people need to stop fussing about the lake level... When you build on a lake, you should make sure you have some margin in your plans to deal with a certain amount of flooding... The marina's and homes that start to run into issues before 505 ft. should work on correcting that fault. My dock doesn't run into an issue until 505.32 feet.... And my camp... well the lake would have to be at about 512 feet before I got nervous...
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11-08-2018, 09:20 AM | #14 |
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Lakeport Landing
I checked on the boat yesterday after spending a week at Las Vegas for the SEMA / AAPEX show. Lake level is very high, almost level with the top of the dock! Boats are sitting pretty high!
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11-08-2018, 09:26 AM | #15 |
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On the news the other night they said we hadn't gone more than 3 days without measurable rain since Sept 1st.
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11-08-2018, 12:54 PM | #16 | |
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What is important is that flow out of winnipesaukee is now at 1200 cfs.... and the lake doesn't appear to have risen since then.... Now if the weather will cooperate the lake level will start downward.... as hopefully the amount of water coming into the lake will not exceed that... of course if it rains this weekend... that could be out the door.... and the Dam could have to be openned further...
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11-08-2018, 04:25 PM | #17 |
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Areal flood watch
An areal flood watch Friday into Saturday for 1-2 inches additional rain
Dave
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11-08-2018, 09:46 PM | #18 |
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504.50 most of today
From Bizer today
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11-10-2018, 09:53 AM | #19 |
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Hey, Bizer
What year was the lake this high in the fall, or close to this high? It was between 2004 and 2008 I believe.
IG
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11-10-2018, 01:40 PM | #20 |
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DES Graph
I prefer viewing the DES graph at the web site below instead of Bizer. It's more current and gives more information. It shows lake level today is nearly at 1982-2017 all time maximum.
https://www.des.nh.gov/organization/.../graph2018.jpg |
11-10-2018, 02:48 PM | #21 |
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Bizer Data
Bizer updates once a week typically and keeps a graph of each year. I am sure he has historical data for years, which is what I am asking of him. I love the visual.
The DES site gives the hour by hour which is helpful to see over a given period how high the lake is. For instance the rise of over an inch since yesterday. Bizer does update his graphs more frequently with extraordinary changes in the lake levels. From my site at www.rattlesnakecam.com/watch.htm you can access both sources of data. IG
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11-10-2018, 06:54 PM | #22 | |
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Quote:
Year Hgt Rank 2001 1.95 1 2016 2.25 2 2002 2.26 3 2004 2.69 4 2000 2.75 5 1984 2.77 6 1985 2.80 7 2014 2.80 8 1993 2.86 9 1994 2.86 10 2007 2.88 11 1998 2.94 12 1982 2.96 13 1992 2.99 14 1999 3.00 15 1997 3.05 16 1983 3.10 17 2013 3.10 18 1991 3.12 19 Avg> 3.13, StdDev= 0.50 1986 3.19 20 2009 3.19 21 1988 3.21 22 2008 3.29 23 2015 3.30 24 1987 3.31 25 2012 3.38 26 2010 3.48 27 2011 3.54 28 1989 3.58 29 2003 3.61 30 2006 3.61 31 1996 3.62 32 1990 3.69 33 1995 3.69 34 2017 4.09 35 2018 4.60 36 2005 4.70 37 |
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11-11-2018, 07:57 AM | #23 |
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Thanks, Bizer
You are always a wonderful source of information.
IG
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11-12-2018, 05:45 PM | #24 |
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Here's what the lake level looks like today...the pontoon deck is usually at dock level or slightly below this time of year.
Sent from my SAMSUNG-SM-G930A using Winnipesaukee Forum mobile app
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12-13-2018, 10:21 AM | #25 |
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Lake Level
Where on the site can you find the lake level ?? Worried about potential damage to walls !!
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12-13-2018, 10:26 AM | #26 | |
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Quote:
On the menu bar (left panel) Lake Level
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12-13-2018, 10:27 AM | #27 |
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Lake Level Pages
Go here: www.rattlesnakecam.com/watch.htm and click on any of the highlighted links. Have fun!
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12-13-2018, 10:47 AM | #28 |
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Shameless plug LOL !!
but actually a great consolidation
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12-13-2018, 10:58 AM | #29 | |
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Here's a link
Quote:
https://www4.des.state.nh.us/rti_data/WEIN3_TABLE.HTML I have this link on my phone and my tablet. Dave
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