020-12 Wyo. Code R. §§ 12-9 - Engineering Design Report

(a) 2018 TSS, parts 1.1-1.1.1(d), engineers report, general information; 1.1.2-1.1.2(c), engineers report, extent of water works system; 1.1.4-1.1.4(c), engineers report, soil, groundwater conditions, and foundation problems; 1.1.5-1.1.5(f), engineers report, water use data; 1.1.6-1.1.6(b), engineers report, flow requirements; 1.1.7-1.1.7.1(f), engineers report, sources of water supply, surface water sources; 1.1.7.2-1.1.7.2(g), engineers report, sources of water supply, groundwater sources; 1.1.8, engineers report, proposed treatment processes; 1.1.9, engineers report, sewerage system available; 1.1.10, engineers report, waste disposal; 1.1.15-1.1.15(d), engineers report, pumping facilities; 1.1.16-1.1.16(c), engineers report, storage; and 1.1.17-1.1.17(d), engineers report, security, contingency planning, and emergency preparedness; are herein incorporated by reference.

(b) An engineering design report shall be submitted with each application and shall include the following required elements:

(i) The information required in paragraph (a) of this Section;

(ii) A description by narrative, analyses, and calculations of the project purpose and intent in order to support the project plans and specifications;

(iii) A description of known or suspected problems, needs, or requirements, and the reasoning used to arrive at the proposed solution;

(iv) An identification of problems and solutions related to but not limited to the following:

(A) Water quantity and quality;

(B) Compliance with the Safe Drinking Water Act, 42 U.S.C. § 300f et seq.; and

(C) Operational requirements, redundancy, maintenance, and reliability.

(v) A determination of the degree of hazard of all known or anticipated water service connections to be connected to the proposed project. A hazard classification shall be identified for each connection and recommended mitigation measures shall be described for each hazard.

(c) The engineering design report for all new water distribution system extensions shall include the following required elements:

(i) The information required in paragraph (a) of this Section;

(ii) A description of the service area including scaled vicinity plan map(s) of the project with regard to adjacent and proposed development, elevations, and topographic features; and

(iii) Current and projected system water use data and flow requirements to include maximum hourly demand and per capita maximum daily flows;

(iv) Information on fire protection and fire flow capabilities of the proposed system.

(d) The engineering design report for all treatment facilities shall include the following required elements:

(i) The information required in paragraph (a) of this Section;

(ii) A description of the facility site and location, including a scaled site plan, and:

(A) Present and projected facility property boundaries;

(B) Flood protection indicating predicted elevation of 25- and 100-year flood stages;

(C) Present and proposed access for the purpose of operation, maintenance, and compliance inspection;

(D) Distances from:

(I) Current habitation;

(II) The closest major treated water transmission line;

(III) The closest treated water storage facility; and

(IV) The water source.

(E) Fencing and security;

(F) Topographic features and contours with indicated datum; and

(G) Soil and subsurface geological characteristics, including a soils investigation report of the proposed site suitable for structural design of the proposed facilities.

(iii) A description of the service area, including scaled vicinity plan map(s) of the project with regard to adjacent and proposed development, elevations, and topographic features;

(iv) A detailed description of the recycle flows and procedures for reclamation of recycle streams; and

(v) A detailed description of disposal techniques for settled solids, including a description of the ultimate disposal of sludge.

(e) Engineering design reports for new surface water sources shall include the following required elements:

(i) The information required in paragraph (a) of this Section;

(ii) A description of water quantity available during average and driest years of record that contains details of:

(A) Any diversion records; and

(B) Diversion dams, impoundments, or reservoirs that may impact design considerations or long-term water availability.

(iii) A tabulation of water quality data that describes the biological, radiological, and chemical water quality sufficient to determine necessary treatment processes that:

(A) For surface water source testing, include at least one sampling event during spring runoff and at least one sampling event during late summer or early fall low flow; and

(B) Includes data that are sufficient for the Division to determine that the processes safely and reliably comply with water quality standards required by 40 CFR Part 141.

(f) Engineering design reports for new groundwater sources shall include:

(i) The information required in paragraph (a) of this Section;

(ii) A description of the geology of the aquifer(s) and overlying strata;

(iii) Tabulated water quality testing data for biological, radiological, and chemical water quality sufficient to determine necessary treatment processes and sufficient for the Administrator to determine that the processes safely and reliably meet water quality standards required by 40 CFR Part 141;

(iv) If known, a summary of the likely drilling and completion challenges that will be faced, including a description of the engineering design, management, monitoring, and drilling and completion practices that will be used to successfully construct the well in accordance with this Chapter; and

(v) For wells that will be drilled through multiple aquifers, applicants shall request a pre-application meeting with the applicable Division district engineer to discuss:

(A) The boring advancement, well sealing, well development, and methods used to determine the adequacy of the well seal; and

(B) The methods that will be used to overcome lost circulation, bore instability, and deviations from vertical alignment.

(g) Engineering design reports for conversion of an existing well into a public water supply well shall include the following required elements:

(i) The information required in paragraph (a) of this Section;

(ii) The information required in paragraph (f) of this Section;

(iii) The submission of the State Engineer's Office (SEO) Statement of Completion and Description of Well; and

(iv) A video log of the well inspection accompanied by a written description of the location, shape, and estimated size of any holes, breaches, corroded areas in the casing, if any, that includes:

(A) If any damage to the casing is found, a description of how defective areas will be repaired and if there is a need for additional well bond logging; or

(B) If well bond logging is not recommended, a description of the technical justification and an alternative means of certifying the adequacy of the well seal to protect the water source.

(h) Engineering design reports for new water treatment facilities shall include the following required elements:

(i) The information required in paragraph (a) of this Section;

(ii) A description of all water treatment chemical requirements, including dosage and feed rates, delivery, handling, and storage;

(iii) A description of automatic operation and control systems, including basic operation, manual override operation, and maintenance requirements; and

(iv) A description of the on-site laboratory facilities and a summary of those tests to be conducted on-site. If no on-site laboratory is provided, a description of plant control and water quality testing requirements, and where the testing will be conducted shall be included.

(i) Engineering design reports for water treatment facility modifications shall describe:

(i) The information required in paragraph (a) of this Section;

(ii) The purpose of the facility modification;

(iii) All proposed new equipment, tankage, and chemical treatment processes, including a description of the modification's effect on treatment system reliability, water quantity and quality; and

(iv) A listing of the new equipment design criteria and the associated chemicals.

(j) Engineering design reports for water main upsizing or looping projects shall describe the purpose of the water main upsizing or looping project and shall include the following required elements:

(i) The information required in paragraph (a) of this Section;

(ii) Hydraulic analysis that demonstrates how peak hour, average day, maximum day, and maximum day plus fire flows, if fire flows are available, will be improved by upsizing; and

(iii) A table that summarizes the hydraulic model results.

(k) Engineering design reports for water main removal and replacements shall describe the purpose of the replacement and identify the existing main size, material type, and condition, and shall include the following required elements:

(i) The information required in paragraph (a) of this Section;

(ii) For any main replacement(s), the replacement main size, material type, and dimension ratio;

(iii) For projects that consist of main replacements in multiple discrete locations, an aerial image that shows all replacement pipeline segments, including new valves, with called-out pipe diameters and lengths;

(iv) A description of the protective measures that will be taken at locations where the new water main will cross a sewer or storm sewer when standard horizontal and vertical separations cannot be met; and

(v) For projects where asbestos cement may be encountered, a discussion of the disposal, or abandonment method to be used.

(l) Engineering design reports for new water mains shall describe the purpose of the new water main and shall include the information required in paragraph (a) of this Section. If the water main will provide service to a new development the engineering design report shall include the following required elements:

(i) The modeling result from a hydraulic analysis that demonstrates that the design will meet the requirements of Section 16(d) (i-ii) of this Chapter;

(ii) A demonstration that the hydraulic model was calibrated based on existing fire hydrant test flow data, when available, or based on modeling; and

(iii) Identification of any impacts the new fire flow demand will have on finished storage and pumping systems over the required fire flow duration.

Notes

020-12 Wyo. Code R. §§ 12-9

Amended, Eff. 7/26/2023.