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Groundwater Table Adjustment Factors

Factors are updated as needed during the wet season. They are an approximation of the groundwater table status for the soil types listed. For further information, contact Brian Sullivan at 401-222-4700 x7720.*Note-some monitoring wells dry/factor may be greater than number indicates.

**A negative number indicates a flooded condition**

Date Glacial outwash (inches) Glacial till (inches) West Bay Glacial till (inches) East Bay
3/31/17 10 24 22
3/15/17 15 29 47
2/1/17 48 32 35
1/18/17 9 7 8
1/4/17 26 54 41
4/13/16 11 23 26
3/30/16 20 37 49
2/24/16 17 36 22
1/27/16 24 67 41
12/16/15 42 90 75
10/28/15 47 96 66
9/16/15 46 96 76
4/13/15 14 10 25
3/18/15 21 55 -4
1/7/15 26 57 24
12/10/14 43 90 42
10/22/14 47 94 80
9/19/14 44 91 80
4/23/14 5 9 20
4/3/14 0 5 -8
3/26/14 18 35 50
3/12/14 21 50 37
2/26/14 18   -1
2/12/14 22 61 48
1/29/14 19 50 26
10/16/13 36 92 82
1/8/14 28 72 35
9/11/13 31 91 79
7/24/13 25 68 56
6/26/13 13 48 34
5/15/13 27 64 68
4/17/13 21 43 49
3/20/13 15 27 18
2/27/13 23 31 8
1/30/13 24 54 52
1/9/13 29 62 43
12/12/12 42 65 67
11/14/12 45 72 76
10/17/12 45 91 83
9/12/12 42 93 80
7/11/12 32 81 72
6/6/12 23 55 67
5/16/12 19 51 31
4/4/12 25 72 68
3/14/12 20 55 58
2/29/12 20 57 56
2/15/12 16 47 55
2/1/12 11 36 35
1/11/12 14 42 53
12/21/11 9 30 35
11/30/11 11 15 29
10/26/11 17 44 23
9/21/11 23 56 62
7/20/11 30 83 76
6/29/11 25 65 65
5/25/11 15 33 47
4/20/11 9 10 21
4/6/11 15 26 45
3/30/11 15 23 46
3/23/11 12 15 36
3/9/11 11 9 11
2/16/11 21   23
1/12/11 33 74 60
12/15/10 30 68 64
11/17/10 42 87 58
10/20/10 45 91 80
9/15/10 43 95 83
8/20/10 37 95 79
7/21/10 32 91 79
6/16/10 15 73 73
5/19/10 5 52 68
4/21/10 -12 11 41
4/14/10 -16 0 21
4/7/10 -25 -9 -9
3/17/10 -12 -5 -15
3/3/10 0 10 9
2/17/10 17 47 56
2/3/10 12 40 41
1/13/10 14 39 56
12/16/09 10 29 25
11/18/09 25 68 57
10/14/09 30 84 51
9/16/09 25 89 66
8/19/09 16 77 65
7/15/09 9 57 38
6/17/09 19 51 68
5/13/09 7 32 43
4/29/09 5 18 31
4/15/09 6 19 19
4/1/09 14 35 48
3/18/09 11 21 31
2/27/09 11 33 46
2/13/09 13 33 39
1/26/09 13 33 49
1/7/09 8 20 23
4/15/08 13 33 38
4/9/08 9 27 28
3/26/08 7 19 13
3/13/08
(3" rain event on 3/8/08)
5 13 -9
2/27/08 16 32 22
2/12/08 30 48 35
1/29/08 35 71 50
1/16/08 36 76 50
1/2/08 39 89 55
4/25/07 -3 1 5
4/13/07 6 18 24
3/30/07 6 24 20
3/16/07 13 50 55
2/28/07 26 58 66
1/30/07 14 37 45
1/16/07 8 29 23
12/15/06 15 51 52
4/17/06 19 66 70
3/29/06 16 59 66
3/15/06 12 48 62
2/27/06 9 30 50
2/1/06 7 13 17
1/12/06 8 33 23
4/27/05 7 20 48
4/5/05 -8 -8 -11
3/21/05 12 38 21
2/25/05 9 23 21
1/28/05 12 33 36
12/30/04 14 40 40
11/29/04 22 ----- -----
10/29/04 26 ----- -----
10/1/04 26 ----- -----
8/24/04 46 ----- -----
8/4/04 60 ----- -----
7/4/04 57 ----- -----
6/4/04 52 ----- -----
5/26/04 12 ----- -----
4/28/04 4 9 4
4/21/04 0 2 4
4/8/04 6 20 4
3/30/04 22 57 57
2/26/04 30 64 62
2/13/04 21 53 62
1/28/04 22 47 63
1/14/04 16 40 48
12/30/03 10 27 32
11/26/03 -5 ----- -----
10/30/03 12 ----- -----
9/29/03 31 ----- -----
8/28/03 24 ----- -----
7/29/03 16 ----- -----
6/26/03 9 ----- -----
5/14/03 12 30 43
4/25/03 0 5 0
4/9/03 6 6 12
3/26/03 7.5 15 25
3/13/03 17 33 21
2/25/03 18 51 28
2/13/03 28 55 65
1/28/03 18 44 53
1/8/03 11 25 -4
5/22/02 18 34 10
5/3/02* 26 49.4 42
4/24/02* 28 65 40
4/10/02* 25 61 18
3/28/02* 29 68 41
3/15/02* 37 81 60
2/28/02* 41 91 62
1/25/02* 42 97 56
4/25/01 6 15 25
4/12/01 -2 -4 -2
4/4/01 -11 -14 -18
3/27/01 -1 -10 -9
3/20/01
(pre-rain event)
12 22 2
2/28/01 21 46 31
2/20/01 22 50 30
2/07/01 24 59 23
1/24/01 26.5 67.5 31
12/28/00 25 67 25
5/26/00 13 36 49
5/9/00 10 23 34
4/26/00 1 5 0
4/13/00 14 28 37
3/31/00 9 20 8
3/21/00 8 21 0
3/14/00 10 31 0
2/24/00 19 56 47
2/8/00 26 65 53
1/21/00 21.5 54 47.5
12/22/99 25 63 40

 



Rev. 4/15/16