Adoption of R309-511 and R309-515 Rule Amendments

The R309-511 (Hydraulic Modeling Rule) Amendment made two clarifications:

• The full hydraulic modeling report is not required for the drinking water projects that meet the criteria in R309-511-4(1)(a)(i) through (iv), and
• Professional Engineer’s certification of the hydraulic modeling results is required for any public drinking water project, except the projects listed in R309-511-4(1)(a)(i)

The R309-515 (Source Development Rule) Amendment made the following clarifications and revisions: 

• Clarify evidence of a legal right to divert water for drinking water sources.
• Clarify standby power requirements for community water systems’ well sources.
• Add well seal depth requirement for drinking water wells equipped with pitless adapter.
• Modify well gravel pack requirement to account for what is currently commercially available.
• Require well capping and abandonment be done in accordance with the Division of Water Right’s Rules.
• Define the safe yield of a well.
• Restrict the well pump size to the pumping rate used for the constant-rate aquifer drawdown test.
• Clarify the required order of well head discharge components
• Specify design requirements for the well pump-to-waste line.
• Outline the procedure for determining the safe yield of a spring.
• Correct numerous outdated and incorrect references. 

 The Division of Drinking Water maintains a DDW version of the rules in addition to the Division of Administrative Rule’s (DAR’s) official record. The DDW version of the rules has been updated and is available on the website. It may take some time before the DAR updates their website. The DDW version of the rule has been formatted for easier reading and clarifications have been added in the form of "Guidance" paragraphs.  Please visit our website (www.drinkingwater.utah.gov) and see the updated 511 and 515 rules under "Laws & Rules."