DELLS POND OUTLET DAM - NH00145-1147

Dam Name: DELLS POND OUTLET DAM

State: NH

Downstream Hazard Potential: H

Incident Type: Non-Failure

Incident Date: 08/28/2011

Incident Driver: Hydrologic/Flooding

Incident Mechanism 1: Sinkhole

Incident Mechanism 2

Incident Mechanism 3

Incident IDNH00145-1147

Incident DescriptionSinkhole developed adjacent to the usptream left spillway abutment wall

Named Hydrologic EventIrene

EAP Enacted (Y/N) due to IncidentYes

Fatalities (Number)

Number of People Evacuated0

Number of Habitable Structures Evacuated

Number of Habitable Structures Flooded0

Other Infrastructure Impacts

Economic Damages (in $)

Response

Volume released at failure (ac-ft)

Additional Remarks or Updates

Owner TypeL

Dam TypeER

Primary Purpose(s)R

EAPY

Dam Height20 ft

Max Storage (ac-ft)80.00

Surface Area (acres)3.00

Year Completed1935

NID NumberNH00145

River NameDELLS BROOK

Latitude44.3122

Longitude-71.7977

Year Modified

Regulatory Agency(ies)NH DEPARTMENT OF ENVIRONMENTAL SERVICES DAM BUREAU

Incident Time

Incident Duration

Incident Report Produced

Information Sources

AttachmentsY