Cold River Land Use Controls :
At the time of the riverís nomination for the NH Rivers Management and Protection Program, the following master plans and zoning ordinances existed within the river corridor from Unity downstream to Walpole .
Comprehensive Master Plan, adopted 1978, amended 1997
Except for a small area at the village of South Acworth zoned Residential, the land within the corridor in Acworth is in the Rural District. The Rural District provides for residential, agricultural, and small cottage industries on lots a minimum of 3 acres in size. In the village of South Acworth , residences and home offices are permitted at the higher density of 1 acre in keeping with the purpose of the District "to preserve the historic, colonial atmosphere of the villages". The Acworth Zoning Ordinance contains several provisions specifically aimed at protecting surface water quality:
The Acworth Subdivision Regulations provide further protection for water resources through the following provisions when developments involve the construction of improvements such as roads and utilities:
Acworth's Non-Residential Site Plan Review Regulations contain the requirement that provision be made for the protection of natural features when planning nonresidential development and incorporate the subdivision regulation erosion control requirements by reference.
Acworth has recognized the value of its scenic resources through the designation of four scenic roads within the river corridor. Certain special features of portions of Campbell Road , Ball Road , Grout Hill Road and Gates Mountain Road are subject to careful review prior to alteration.
Master Plan, 1979
Alstead's Zoning Ordinance provides for the preservation of the "special quality and character of the Town's historic village centers", including Alstead Village alongside the River, through the dimensional and use provisions of the Village District. Surrounding corridor lands in Alstead are part of the Rural Residential District which provides for larger lot sizes and allowance for some uses not appropriate in a village environment. Outside of the corridor, a special Lakeside District exists to protect the special quality of Lake Warren , headwater of the Warren Brook tributary.
The Floodplain Development Ordinance requires a special permit for any proposed development in the 100-year floodplain. New construction and substantial improvements must be elevated or floodproofed, septic systems must be floodproofed, and development which would result in an increase in flood levels is not allowed. Manufactured homes must be anchored as well. In addition, proposed structures on slopes in the floodplain need to include a design for appropriate storm water drainage.
One purpose of Alstead's Subdivision Regulations is to preserve and protect water bodies and water courses and other natural features.
Master Plan, adopted 1986, amended 92
Under Langdon's Zoning Ordinance the whole community is within one district in which residential and agricultural use are allowed. Commercial and industrial uses involving more than one acre, 2,000 square feet, or two or more employees require ZBA review, providing an opportunity for potential water resources impacts to be identified and evaluated.
Master Plan, adopted 1987
Lempster's Subdivision Regulations provide some protection for water resources through the following provisions when developments involve the construction of improvements such as roads and utilities:
Zoning Ordinance, Town of Walpole, adopted 1966, amended 1972
Land use in the Walpole section of the corridor is regulated to the south of the Cold River by the Town of Walpole Zoning Ordinance and to the north by the Village of North Walpole Zoning Ordinance .
The Town of Walpole Zoning Ordinance provides for four different districts within the river corridor. Lands upstream from the Cold River Materials excavation are within the Rural-Agricultural District. The purpose of this district is to provide ample area for the pursuit of agricultural and forestry activities. Together with the Timberland District, this district comprises the bulk of Walpole 's land area, reflecting the importance of natural resources to the community. The property encompassed by the excavation is zoned Industrial to accommodate the excavation activities. The Ordinance provides for Planning Board review of proposed industrial activities for potential offending impacts, including water pollution. In addition, the provisions of RSA 155-E are incorporated by reference. The Cold River village area is zoned Residential-B. In this district, use is primarily limited to residential to ensure continued enjoyment by residents. The lot size is relatively small in keeping with the traditional village atmosphere. Commercial use is provided for along NH 12. Most types of businesses with potential water quality impacts, such as vehicle servicing and industrial uses, require a special exception from the ZBA prior to locating in the Commercial District.
A special exception is required for any use in the Floodplain Overlay District. Mobile homes are prohibited in the 100-year floodplain areas along the River. New construction and substantial improvements must be elevated or floodproofed, septic systems must be floodproofed, and development which would result in an increase in flood levels is not allowed.
To the north of the River, the Village of North Walpole Zoning Ordinance provides for residential use for all of the corridor land with the exception of one small parcel zoned Industrial. The Residential District limits use to residential and customarily associated uses, and provides for the small lot sizes typical of a village atmosphere. In the Industrial District, applicants require Zoning Board approval following review for impacts such as potential water pollution.
Walpole 's Land Subdivision Control Regulations provide some protection for surface water resources by restricting subdivision of floodplains and poorly drained soils and requiring a storm water management plan.
Walpole 's Site Plan Review Regulations provides further protection for surface waters by controlling erosion and sedimentation that may otherwise be associated with nonresidential and multi-family development. In addition, the Regulations enable storm water to become groundwater recharge by enabling the use of permeable pavement.