POOL STAGE FREQUENCIES

BIRCH HILL DAM

Millers River, Massachusetts

(1936, 1938, 1944-1998)

(D.A. = 175 square miles) 

FREQUENCY

POOL STAGE

STORAGE

(yr)

  2

  5

 10

 20

 50

100

200

 

(ft)

14.0

20.5

25.0

29.0

34.8

37.7

38.7

 

(acre-feet)

 6,000

13,000

20,400

28,300

43,500

52,500

55,500

 

(inches)

0.6

1.4

2.2

3.0

4.7

5.6

5.9

 

(percent full)

 12

 26

 41

 57

 87

100+

100+

     Permanent Pool  =  None

     Spillway Crest  =  37.0 ft.  

     Gate Invert  =  815.0 ft-NGVD