(1) A subdivision shall connect to the public water system if the closest water main is within a distance equal to 100 feet multiplied by number of lots in the subdivision. A proposed subdivision shall not generate a demand on the source, treatment facilities or distribution system of the Portland Water District beyond the capacity of those system components, considering improvements that are planned to be in place prior to occupancy of the subdivision. The applicant shall be responsible for paying the costs of system improvements to the Portland Water District's system as necessary in order to facilitate connection.
(2) When a subdivision is to be served by a public water system, the complete supply system within the subdivision, including fire hydrants, shall be installed at the expense of the applicant. The size and location of mains, gate valves, hydrants, and service connections shall be reviewed and approved, in writing, by the Portland Water District and the Windham Fire-Rescue Chief.
(3) When a proposed subdivision is not within a distance required for connection to the public water system, water supply shall be from individual wells or a private community water system. The following standards shall apply to individual wells or private community water systems:
(a) Individual wells shall be sited and constructed to prevent infiltration of surface water, and contamination from subsurface wastewater disposal systems and other sources of potential contamination.
[1] Due to the increased chance of contamination from surface water, dug wells shall be prohibited on lots of smaller than one acre. On lots of one acre or smaller, the applicant shall prohibit dug wells by deed restrictions and a note on the plan.
[2] On lots greater than one acre, dug wells may only be installed where it is not possible to utilize another well system.
[3] Wells shall not be constructed within 100 feet of the traveled way of any street if located downhill from the street, or within 50 feet of the traveled way of any street if located uphill of the street. This restriction shall be included as a deed restriction to the affected lots.
(b) Lot design shall permit placement of wells, subsurface wastewater disposal areas, and reserve sites for subsurface wastewater disposal areas in compliance with the Maine Subsurface Waste Water Disposal Rules and the Well Drillers and Pump Installers Rules.
(c) If a central water supply system is provided by the applicant, the location and protection of the source and the design, construction and operation of the system shall conform to the standards of the Maine Rules Relating to Drinking Water (10-144 CMR 231).
(d) In residential subdivisions where the Fire-Rescue Department identifies the need for additional water storage capacity for firefighting purposes, the applicant shall provide adequate water storage facilities.
[1] Facilities may be ponds with dry hydrants, underground storage reservoirs or other methods acceptable to the Fire-Rescue Chief.
[2] A minimum storage capacity shall meet the requirements of the National Fire Protection Association Life Safety Code (NFPA 101). The Board may require additional storage capacity upon a recommendation from the Fire-Rescue Chief.
[3] Where surface ponds are proposed for water storage, the capacity of the pond shall be calculated based on the lowest water level less an equivalent of three feet of ice. An easement shall be granted to the municipality, granting access to and maintenance of dry hydrants or reservoirs where necessary.
[4] Hydrants or other provisions for drafting water shall be provided to the specifications of the Fire-Rescue Department. Minimum pipe size connecting dry hydrants to ponds or storage vaults shall be six inches. A suitable accessway to the hydrant or other water source shall be constructed.
[5] The Board may waive the requirement for water storage only upon submittal of evidence that the soil types in the subdivision will not permit their construction or installation and/or that the Fire-Rescue Chief has indicated, in writing, that alternate methods of fire protection are available and incorporated into the subdivision plan.
