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Blackwood Groves Site Plan
Snow Storage Report
Page 1 of 6
BLACKWOOD GROVES SITE PLAN
SNOW STORAGE REPORT
A. Introduction
This design report presents technical data for the snow storage plan at the Blackwood Groves
residential development. The following design parameters were used to develop a snow storage
plan:
-106,928 ft2 of parking area (total asphalt area, including drive aisles and parking stalls)
-Snow storage piles may be stacked maximum 8 ft high
-The (38 ) proposed snow storage piles will have a total area of 15,600 ft2
-Average snowfall and temperature data for Bozeman, MT was collected from the U.S.
Climate Data website during the period 1981 -2010 (1)
B. Method
A snow depth of 2.8 3 ft across the parking lot area was used to calculate the anticipated volume
of snow to be removed based on average snowfall data from the U.S. Climate Data website.
Snowfall averages were taken from the months of November to February, where average
temperatures remained below freezing. Throughout the rest of the year average temperatures did
not drop below 32 degrees Fahrenheit so melting of snow piles can be assumed. Please reference
table 1 below for average snowfall and temperature data from the U.S. Climate Data website:
Month
(1981 -2010)
Avg.
Snowfall (in.)
Avg. High
Temperature
(°F)
Avg. Low
Temperature
(°F)
Avg. Overall
Temperature
(°F)
January 9 35 14 24.5
February 6 38 17 27.5
March 8 47 24 35.5
April 4 56 30 43
May 1 65 38 51.5
June 0 73 44 58.5
July 0 83 50 66.5
August 0 82 48 65
September 0 72 40 56
October 3 58 32 45
November 8 43 21 32
December 11 33 12 22.5
Table 1: Average snowfall and temperature (U.S. Climate Data 1981 -2010)
As stated above, the average snowfall amount during the months of November to February totals
to an amount of 2.83 ft. This amount was used along with the square footage of the parking lot
area to come up with a total volume of 302,962 ft 3 of snow during months of freezing average
temperatures. In an analysis done by Morrison Maierle in 2019, it was determined that loose
snow compacts to about 40% of its original volume (see attachment following this report). Using
this data, the actual volume of snow anticipated to be removed can be estimated at 121,185 ft 3.
Blackwood Groves Site Plan
Snow Storage Report
Page 2 of 6
The snow storage areas were designed conservatively at a maximum height of 8 ft. With a
combined area of 15,600 ft2, the snow storage areas have a volume capacity of 124,796 ft3,
greater than the anticipated 121,185 ft3 volume of snow to be removed. With th is anticipated
volume of snow to be removed , the piles of snow would not exceed 8 ft. Please see table 2 on the
next page for a breakdown of these calculations :
Blackwood Groves Site Plan
Snow Storage Report
Page 3 of 6
Snow Storage
Area Number
Area (ft 2) Anticipated
Volume (ft 3)
Available
Volume (ft 3)
1 3,761 29,221 30,092
2 995 7,730 7,961
3 489 3,796 3,909
4 256 1,985 2,044
5 114 888 915
6 410 3,187 3,282
7 114 888 915
8 114 888 914
9 114 888 915
10 114 888 915
11 126 976 1,005
12 173 1,348 1,388
13 171 1,328 1,368
14 114 888 914
15 114 888 915
16 379 2,942 3,030
17 114 888 915
18 183 1,424 1,467
19 186 1,447 1,490
20 303 2,350 2,420
21 170 1,321 1,360
22 374 2,905 2,9 92
23 479 3,720 3,831
24 244 1,892 1,948
25 467 3,627 3,735
26 98 761 784
27 170 1,318 1,358
28 2,861 22,223 22,885
29 255 1,985 2,044
30 114 884 910
31 162 1,262 1,299
32 302 2,342 2,412
33 301 2,335 2,404
34 114 888 915
35 208 1,615 1,663
36 936 7,268 7,485
37 114 888 915
38 114 888 915
Total: 15,600 121,185 124,796
Table 2: Anticipated vs available snow storage volume.
Blackwood Groves Site Plan
Snow Storage Report
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As shown by the table, there is ample designed snow storage volume to accommodate the
anticipated volume of snow to be removed (1 0 3% of anticipated). In addition, the client has
agreed to haul away excess snow after large storm events when the snow piles exceed the design
height.
Please refer to sheet C1.5 Snow Storage for an exhibit showing the locations of the snow storage
areas on the site.