created April 1, 2015
modified October 8, 2018
verified October 8, 2018

Derby Dams
NUMBER NAME POND HAZARD CLASS
3701 Lake Housatonic Dam/Derby Dam Housatonic River C
3702 Lower Ansonia Reservoir Dam Lower Derby Hill Reservoir C
3704 Upper Ansonia Reservoir Dam Upper Derby Hill Reservoir C
3708 Upper Ansonia Reservoir East Dike Upper Derby Hill Reservoir C
3709 Derby Housatonic Levee Housatonic River C

Dam Safety Status as issued by DEEP as of January 22, 2016.



Hazard Classes
Class Damage Level Type of Damage Economic Loss
AA: Negligible Minor damage to roads, land or structures Negligible
A: Low Damage to agricultural lands, unimproved roadways Minimal
BB: Moderate Damage to normally unoccupied storage structures, low volume roadways Moderate
B: Significant Possible loss of life, minor damage to habitatible structures and residences, convalescent homes. Damage to primary roadways and rail lines Significant
C: High Probable loss of life, major damage to habitable structures, residences, convalescent homes, schools, etc. Damage to major highways High
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