Idaho Administrative Code › Title IDAPA 58 - Environmental Quality, Department of › Rule 58.01.16 - WASTEWATER RULES › Section 58.01.16.411 - FACILITY AND DESIGN STANDARDS FOR MUNICIPAL WASTEWATER TREATMENT OR DISPOSAL FACILITIES: PRELIMINARY ENGINEERING REPORTS

Current through August 31, 2023
01.
Preliminary Engineering Reports Required
. Preliminary engineering
			 reports are required for municipal wastewater treatment or disposal facility
			 projects that require plan and specification review and approval pursuant to
			 Subsection 400.03 and shall address all
			 applicable issues specifically required in Sections
			 411 through
			 599 of these rules including, but
			 not limited to, purpose, scope, hydraulic capacity, treatment capacity, and
			 operation and maintenance considerations sufficiently to determine the effects
			 of the project on the overall wastewater infrastructure. Preliminary
			 engineering reports must be completed for major wastewater collection system
			 projects, all pump station projects, all treatment plant designs and upgrades,
			 and all septage transfer stations. Preliminary engineering reports are not
			 required for simple wastewater main extensions that are approved in accordance
			 with Subsections 410.01.a. or 410.01.b.
			 (3-31-22)
02.
Submittal to
			 Reviewing Authority
. Preliminary engineering reports shall be submitted
			 to the Department for review and must be approved by the Department prior to
			 the submission of plans and specifications. (3-31-22)
03.
Preliminary Engineering Report
			 Contents
. The preliminary engineering report must include sufficient
			 detail to demonstrate that the proposed project meets applicable criteria. The
			 preliminary engineering report generally addresses project specific issues
			 rather than the overall system-wide plan. The preliminary engineering report
			 shall identify and evaluate wastewater related problems; assemble basic
			 information; present criteria and assumptions; examine alternative solutions
			 with preliminary layouts and cost estimates; offer a conclusion with a proposed
			 project; and outline official actions and procedures to implement the project.
			 The items included in Subsections
			 411.03.a. through 411.03.c.,
			 and other items specifically called for in Sections
			 426 through
			 599, shall be addressed in detail
			 in the preliminary engineering report. If specific items are not applicable to
			 a particular design, then the designer shall state this in the preliminary
			 engineering report and state the reason why it is not applicable. Items
			 adequately addressed in the facility plan under which the project is being
			 designed, may be addressed by reference for purposes of the preliminary
			 engineering report. (3-31-22)
a. Major
			 Wastewater Collection System Projects. Items applicable to preliminary
			 engineering reports for major wastewater collection system projects are listed
			 in Subsections 411.03.a.i. through
			 411.03.a.vi. (3-31-22)
i. Coordination with
			 Facility Plan. The preliminary engineering report shall discuss or reference
			 items provided in the Department-approved facility plan. These items include,
			 but are not limited to: (3-31-22)
(1) Location
			 of project; (3-31-22)
(2)
			 Population served by project; (3-31-22)
(3) Existing and proposed wastewater flows;
			 (3-31-22)
(4) Existing and proposed
			 collection system; (3-31-22)
(5)
			 Existing and proposed treatment works; (3-31-22)
(6) Existing and proposed disposal methods;
			 (3-31-22)
(7) Drinking water system
			 impacts; (3-31-22)
(8) Hydraulic
			 analysis; and (3-31-22)
(9)
			 Financing methods. (3-31-22)