A master plan
is required for every community water system with 300 or more service
connections or serving more than 1,000 people and shall be maintained by the
water supplier for the duration of the period to which the plan applies. Master
plans shall be prepared by a professional engineer registered in Oregon and
submitted to the Authority for review and approval.
Each master plan shall evaluate the needs
of the water system for at least a twenty-year period and shall include, but
not be limited to, the following elements:
A summary of the overall plan that includes the water quality and service
goals, identified present and future water system deficiencies, the engineer's
recommended alternative for achieving the goals and correcting the
deficiencies, and the recommended implementation schedule and financing program
for constructing improvements.
A description of the existing water system which includes the service area,
source(s) of supply, status of water rights, current status of drinking water
quality and compliance with regulatory standards, maps or schematics of the
water system showing size and location of facilities, estimates of water use,
and operation and maintenance requirements.
(C) A description of water quality and level
of service goals for the water system, considering, as appropriate, existing
and future regulatory requirements, nonregulatory water quality needs of water
users, flow and pressure requirements, and capacity needs related to water use
and fire flow needs.
estimate of the projected growth of the water system during the master plan
period and the impacts on the service area boundaries, water supply source(s)
and availability, and customer water use.
(E) An engineering evaluation of the ability
of the existing water system facilities to meet the water quality and level of
service goals, identification of any existing water system deficiencies, and
deficiencies likely to develop within the master plan period. The evaluation
shall include the water supply source, water treatment, storage, distribution
facilities, and operation and maintenance requirements. The evaluation shall
also include a description of the water rights with a determination of
additional water availability, and the impacts of present and probable future
drinking water quality regulations.
(F) Identification of alternative engineering
solutions, environmental impacts, and associated capital and operation and
maintenance costs, to correct water system deficiencies and achieve system
expansion to meet anticipated growth, including identification of available
options for cooperative or coordinated water system improvements with other
local water suppliers.
description of alternatives to finance water system improvements including
local financing (such as user rates and system development charges) and
financing assistance programs.
A recommended water system improvement program including the recommended
engineering alternative and associated costs, maps or schematics showing size
and location of proposed facilities, the recommended financing alternative, and
a recommended schedule for water system design and construction.
If required as a condition of a water use
permit issued by the Water Resources Department, the Master Plan shall address
the requirements of OAR 690-086-0120
(Water Management and Conservation
A seismic risk
assessment and mitigation plan for water systems fully or partially located in
areas identified as VII to X, inclusive, for moderate to very heavy damage
potential using the Map of Earthquake and Tsunami Damage Potential for a
Simulated Magnitude 9 Cascadia Earthquake, Open File Report 0-13-06, Plate 7
published by the State of Oregon, Department of Geology and Mineral Industries.
(i) The seismic risk assessment must identify
critical facilities capable of supplying key community needs, including fire
suppression, health and emergency response and community drinking water supply
(ii) The seismic risk
assessment must identify and evaluate the likelihood and consequences of
seismic failures for each critical facility.
(iii) The mitigation plan may encompass a
50-year planning horizon and include recommendations to minimize water loss
from each critical facility, capital improvements or recommendations for
further study or analysis.