Dam Reconstruction – Holt Pond Dam
Nashua, New Hampshire
Professional Services Provided
- Water Resources Engineering
Description of Professional Services
The Pennichuck Brook and its watershed have been a source of drinking water for Nashua, New Hampshire since 1890 when a long earth dam was constructed to impound Holt Pond. DuBois & King's water resource engineers were retained to complete an assessment, design, construction management and inspection for reconstruction of the dam.
D&K Service Highlights
- Hydrology and hydraulics analysis of the Pennichuck Brook and watershed.
- Geotechnical: subsurface investigation, supervised drilling and testing, flow net analysis, estimated seepage rate, designed mineral toe drain filter, slope stability analysis of embankment.
- Structural analysis and design: retaining walls, new concrete ogee spillway, spillway slab, exit channel.
- Permitting: NH DES Dam Safety Permit, Wetlands Permit, Dredge & Fill Permit and local permits.
- Construction phase services: resident inspection, record drawings.
Of note:
The project, from design through construction, was completed in about 14 months. Back to Top
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