Piscataquog River, Hopkinton New Hampshire

(1936, 1963-1997)

(D.A. = 64 square miles-(net)  446 square miles-(gross)) 

FREQUENCY

POOL STAGE

ELEVATION

STORAGE

(yr)

   2   

  10   

 50 *

100 *

500 *

(ft)

32.5

60.0

90.0

93.0

96.0

(ft-NGVD)

357.5

385.0

415.0

418.0

421.0

(acre-feet)

  3,825

 23,250

 82,750

 91,500

100,500

(inches)

1.1

 6.8

 24.2

 26.8

 29.4

   Normal Pool Level  =  15.0  ft. (340.0  ft-NGVD)

   Spillway Crest Elevation =  93.0 ft. (418.0  ft-NGVD)  

   Spillway Crest Frequency = Between 80 and 100-yr event.  

   Gate Invert  =  325.0 ft-NGVD

*  Hopkinton and Everett Lakes become one pool between a 25 and 33 year event.