Holt Pond Dam, located in NASHUA, New Hampshire, is a concrete structure completed in 1890 for the primary purpose of water supply.
Wind
Humidity
This dam on PENNICHUCK BROOK stands at 12.6 feet tall and spans 310 feet in length, with a storage capacity of 333 acre-feet. The dam is regulated by the NHDES DAM BUREAU and undergoes regular inspections, with the most recent assessment in November 2017 rating its condition as satisfactory and its hazard potential as low.
Despite its age, Holt Pond Dam continues to serve as a vital water resource for the surrounding area, with a normal storage capacity of 61 acre-feet and a drainage area of 21.9 square miles. The dam's spillway, classified as uncontrolled, has a width of 41 feet and a maximum discharge capacity of 1411 cubic feet per second. With a moderate risk rating of 3, the dam is equipped with emergency action plans and regular risk assessments to ensure the safety and integrity of the structure for both water supply and climate protection purposes.
As a privately owned dam in Hillsborough County, Holt Pond Dam plays a significant role in water management and supply for the region. With its historical significance and continued functionality, this concrete buttress dam remains a crucial asset for water resource and climate enthusiasts interested in the sustainability and resilience of water infrastructure in New Hampshire.
Year Completed |
1890 |
Dam Length |
310 |
Dam Height |
12.6 |
River Or Stream |
PENNICHUCK BROOK |
Primary Dam Type |
Concrete |
Surface Area |
35 |
Drainage Area |
21.9 |
Nid Storage |
333 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
13 |