Site work for a water / sewer project in Portsmouth, New Hampshire. Completed plans call for site work for a water / sewer project.

The NH Department of Natural and Cultural Resources through its Division of Parks and Recreation is seeking proposals from site work contractors for the reconstruction of a portion of a stone masonry retaining wall at the Wentworth Coolidge Mansion State Historic Site in Portsmouth, NH. The retaining wall supports a strip of lawn area on the northeast side of the Wentworth Coolidge Mansion along the shore of the back channel of the Piscataqua River in Portsmouth Harbor. The retaining wall is a seawall in the sense that the Piscataqua River is a tidal estuary. At high tide, the water level typically reaches the bottom of the retaining wall, while at low tide, mud flats are exposed in front of the wall The wall is considered to be a character-defining element in the historic landscape around the Wentworth Coolidge Mansion. The Division of Parks and Recreation is asking for proposals to reconstruct the wall in order to find the best way to create a structurally functional retaining wall with the least change to the historically significant visual character of the existing wall. Construction is scheduled to take place from September through November of 2021. Proposer Inquiry Period Ends 6/4/2021 12:00 noon Final Agency Responses to Proposer Inquiries 6/9/2021 4:00 PM Estimate Timeframe for Proposer Oral Presentations and Interviews (if applicable) 6/29 and 6/30 2021 Estimated Notification of Selection and Begin Contract Negotiations 7/7/2021