uri go : Sorry I read your last post Wrong and thought you were pulling my leg. Monticello NY , not Pa.
Short version fossil fuel supplies are figured on the number of degrees below 70 F that the Mean Temperature Falls below on that day !
A month that the
average mean temps are all At 50 degrees has 70-50=20 x30 (days per month)=600 degree days !
For the purpose of determining a 'safe 8 years out of 10' we can simplify, and use the mean temps below freezing -
Without making any adjustments for unshaded south facing slopes,(scarce when the sun is low on the horizon Dec,Jan, Feb- -) Wind
breaks,or the presence of LARGE bodies of water Monticello is surprisingly as cold as my home town, Edwards NY, Over 200 miles
further North !
The mean temperature for the first 10 days of Dec is at or above Freezing, The last 3 weeks slowly fall to 10 degrees of frost, during that
period your Supply lines will need to be drained down i strongly recommend a globe valve not a gate valve for this job ! THis should get
you through New years day Weekend !
The
Average Mean temperature for all of Jan and the 1st 15 days of Feb is 10 Degrees of Frost, sorry no go !
The last of Febs mean temps warm to only 6 degrees of frost. At this point If you had a 250 gal container full of unfrozen water you should
carry over 8 years out of 10, only needing to drain down the large diameter supply line !
Marches mean temps for the 1st 1/2 of March is just like febs last half except you should be able to fill your 250 gal tank or preferably
larger from Rain water and carry over draining outside supply lines !
2nd half of March you should be able to have standing water in your supply lines as the mean and your 8 of 10 averages are above Freezing
As
local conditions can very over as little as 100 yards horizontal, and 10 yards vertical distance from large standing water, more attention
to the means at your exact location, Ask when local camp owners install and take out there pumps ! Hope you find this accurate to 1 year
out of 10 !
For the good of the Craft ! Be safe, keep warm ! As always comments/questions are solicited and Welcome ! Burn like fire flow like water !