Blackwater River, New Hampshire

(D.A. = 128 square miles) 

FREQUENCY

ELEVATION

STORAGE

(yr)

  2

  5

 10

 20

 50

100

(ft-NGVD)

543.5

551.0

555.0

558.5

563.0

566.0

(acre-feet)

 5,000

12,600

19,200

26,600

38,200

46,000

(inches)

0.7

1.8

2.8

3.9

5.6

6.7

(percent full)

 11

 27

 42

 58

 83

100

     Normal Pool Level  =  515 ft-NGVD

     Spillway Crest  =  566.0 ft-NGVD  

     Gate Invert  =  515.0 ft-NGVD