Utah Administrative Code
Topic - Environmental Quality
Title R309 - Drinking Water
Rule R309-511 - Hydraulic Modeling Requirements
Section R309-511-4 - General
Universal Citation: UT Admin Code R 309-511-4
Current through Bulletin 2024-18, September 15, 2024
(1) Rule Applicability.
(a) This rule applies to public drinking
water systems categorized as community water systems as defined by rule
R309-100-4(2),
and to non-transient non-community water systems that have system demands
higher than required by R309-510 or with demands for fire suppression. All
public drinking water systems are still required to comply with
R309-550-5 with
respect to water main design, which may require a hydraulic analysis.
Submission of the Hydraulic Model Report, as defined in
R309-511-7 and 8, is not required for projects meeting one of the following criteria:
(i) public drinking water projects that will
not result in negative hydraulic impact, such as, but not limited to;
(A) addition of new sources in accordance
with R309-515;
(B) adding
disinfection, fluoridation, or other treatment facilities that do not adversely
impact flow, pressure or water quality;
(C) storage tank repair or
recoating;
(D) water main additions
with no expansion of service (e.g., looping lines);
(E) adding transmission lines to storage or
sources without adding service connections;
(F) adding pump station(s) from source or
storage upstream of distribution service connections; or,
(G) public drinking water projects that have
negligible hydraulic impact as determined by the Director.
(ii) public drinking water projects that are
a part of a planned phase of a master plan previously approved by the Director
per
R309-500-6(3)(a);
(iii) the water system maintains and updates
a hydraulic model of the system, and has designated a professional engineer
responsible for overseeing the hydraulic analysis in meeting the requirements
of R309-511 in writing to the Director; or,
(iv) the water system has a means that is
deemed acceptable by the Director to gather real-time data indicative of
hydraulic conditions in model scenarios of
R309-511-5(9),
and the real-time data show the system is capable of meeting the flow and
pressure requirements for the additional demands placed on the existing
system.
(b) Professional
Engineer's certification of the hydraulic modeling results, as defined in
R309-511-4(2)(c) and
R309-511-6(1),
shall be part of the submission of plans for any public drinking water project
as defined in
R309-500-5(1)
except for the projects listed under R309-511-4(1)(a)(i).
(c) A public water system must clearly
identify the reason in the plan submittal if it wishes to demonstrate that
R309-511 does not apply to a new construction project. In some cases,
supporting documentation may be needed.
(d) If there are existing deficiencies in the
water system, the Director may allow a new construction project to proceed in
accordance with the plan review requirements in R309-500 through 550 as long as
the public water system demonstrates that the new construction project is
located in a hydraulically separated area and does not adversely impact the
existing deficiencies, or does not create new deficiencies within the water
system.
(2) Rule Elements.
The public water system or its agent, in connection with the submission of plans and specifications to the Director, shall perform the following:
(a) conduct a hydraulic
modeling evaluation consistent with the requirements as set forth in this rule
and R309-510. This model shall include either the entire public drinking water
system or the specific areas affected by the new construction if hydraulically
separated areas exist within the water system;
(b) calibrate the model using field
measurements and observations;
(c)
certify in writing to the Director that the design complies with the sizing
requirements of R309- 510 and the minimum water pressures of
R309-105-9;
(d) prepare and submit a Hydraulic Model
Design Elements Report (see
R309-511-7); and,
(f) prepare a System
Capacity and Expansion Report if required (see
R309-511-8).
Disclaimer: These regulations may not be the most recent version. Utah may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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