a. a summary of the basis of design,
b. operation requirements, where applicable,
c. general layout,
d. detailed plans,
f. cost estimates.
Where the Design/Build construction concept is to be utilized, special consideration must be given to: designation of a project coordinator; close coordination of design concepts and submission of plans and necessary supporting information to the reviewing authority; allowance for project changes that may be required by the reviewing authority; and reasonable time for project review byt he reviewing authority.
The engineer's report for water works improvements shall, where pertinent, present the following information:
a. description of the existing water works and sewerage facilities,
b. identification of the municipality or area served,
c. name and mailing address of the owner or official custodian.
a. description of the nature and extent of the area to be served,
b. provisions for extending the water works system to include additional areas,
c. appraisal of the future requirements for service, including existing and potential industrial, commercial, institutional, and other water supply needs.
Where two or more solutions exist for providing public water supply facilities, each of which is feasible and practicable, discuss the alternate plans. Give reasons for selecting the one recommended, including financial considerations, and a comparison of the minimum classification of water works operator required for operation of each alternative facility.
a. the character of the soil through which water mains are to be laid,
b. foundation conditions prevailing at sites of proposed structures,
c. the approximate elevation of ground water in relation to subsurface structures.
a. a description of the population trends as indicated by available records, and the estimated population which will be served by the proposed water supply system or expanded system,
b. present water consumption and the projected average and maximum daily demands, including fire flow demand (see Section 1.1.6 ),
c. present and/or estimated yield of the sources of supply,
d. unusual occurrences.
a. hydraulic analyses based on flow demands and pressure requirements (See Section 8.1.1)
b. fire flows, when fire protection is provided, meeting the recommendations of the Insurance Services Office or other similar agency for the service area involved.
Describe the existing sewerage system and sewage treatment works, with special reference to their relationship to existing or proposed water works structures which may affect the operation of the water supply system, or which may affect the quality of the supply.
Describe the proposed source or sources of water supply to be developed, the reasons for their selection, and provide information as follows:
a. hydrological data, stream flow and weather records,
b. safe yield, including all factors that may affect it,
c. maximum flood flow, together with approval for safety features of the spillway and dam from the appropriate reviewing authority,
d. description of the watershed, noting any existing or potential sources of contamination (such as highways, railroads, chemical facilities, etc.) which may affect water quality,
e. summarized quality of the raw water with special reference to fluctuations in quality, changing meteorological conditions, etc.
f. source water protection issues or measures that need to be considered or implemented.
a. sites considered,
b. advantages of the site selected,
c. elevations with respect to surroundings,
d. probable character of formations through which the source is to be developed,
e. geologic conditions affecting the site, such as anticipated interference between proposed and existing wells,
f. summary of source exploration, test well depth, and method of construction; placement of liners or screen; test pumping rates and their duration; water levels and specific yield; water quality,
g. sources of possible contamination such as sewers and sewerage facilities, highways, railroads, landfills, outcroppings of consolidated water-bearing formations, chemical facilities, waste disposal wells, etc.
h. wellhead protection measures being considered (see Section 18.104.22.168 and 22.214.171.124).
Summarize and establish the adequacy of proposed processes and unit parameters for the treatment of the specific water under consideration. Alternative methods of water treatment and chemical use should be considered as a means of reducing waste handling and disposal problems. Pilot studies may be required.
Discuss the various wastes from the water treatment plant, their volume, proposed treatment and points of discharge.
Provide supporting data justifying automatic equipment, including the servicing and operator training to be provided. Manual override must be provided for any automatic controls. Highly sophisticated automation may put proper maintenance beyond the capability of the plant operator, leading to equipment breakdowns or expensive servicing. Adequate funding must be assured for maintenance of automatic equipment.
a. discussion of the various sites considered and advantages of the recommended ones,
b. the proximity of residences, industries, and other establishments,
c. any potential sources of pollution that may influence the quality of the supply or interfere with effective operation of the water works system, such as sewage absorption systems, septic tanks, privies, cesspools, sink holes, sanitary landfills, refuse and garbage dumps, etc.
a. estimated cost of integral parts of the system,
b. detailed estimated annual cost of operation,
c. proposed methods to finance both capital charges and operating expenses.
Summarize planning for future needs and services.
Plans for waterworks improvements shall, where pertinent, provide the following:
a. suitable title,
b. name of municipality, or other entity or person responsible for the water supply,
c. area or institution to be served,
e. north point,
f. datum used,
g. boundaries of the municipality or area to be served,
h. date, name, and address of the designing engineer,
i. imprint of professional engineer's seal or conformance with engineering registration requirements of the individual state,
j. legible prints suitable for reproduction,
k. location and size of existing water mains,
l. location and nature of existing water works structures and appurtenances affecting the proposed improvements, noted on one sheet.
a. stream crossings, providing profiles with elevations of the stream bed and the normal and extreme high and low water levels,
b. profiles having a horizontal scale of not more than 100 feet to the inch and a vertical scale of not more than 10 feet to the inch, with both scales clearly indicated,
c. location and size of the property to be used for the groundwater development with respect to known references such as roads, streams, section lines, or streets,
d. topography and arrangement of present or planned wells or structures, with contour intervals not greater than two feet,
e. elevations of the highest known flood level, floor of the structure, upper terminal of protective casings and outside surrounding grade, using United States Coast and Geodetic Survey, United States Geological Survey or equivalent elevations where applicable as reference,
f. plat and profile drawings of well construction, showing diameter and depth of drill holes, casing and liner diameters and depths, grouting depths, elevations and designation of geological formations, water levels and other details to describe the proposed well completely,
g. location of all existing and potential sources of pollution which may affect the water source or underground treated water storage facilities,
h. size, length, and identity of sewers, drains, and water mains, and their locations relative to plant structures,
i. schematic flow diagrams and hydraulic profiles showing the flow through various plant units,
j. piping in sufficient detail to show flow through the plant, including waste lines,
k. locations of all chemical storage areas, feeding equipment and points of chemical application (see Part 5),
l. all appurtenances, specific structures, equipment, water treatment plant waste disposal units and points of discharge having any relationship to the plans for water mains and/or water works structures,
m. locations of sanitary or other facilities, such as lavatories, showers, toilets, and lockers, when applicable or required by the reviewing authority,
n. locations, dimensions, and elevations of all proposed plant facilities,
o. locations of all sampling taps,
p. adequate description of any features not otherwise covered by the specifications.
Complete, detailed technical specifications shall be supplied for the proposed project, including
a. a program for keeping existing water works facilities in operation during construction of additional facilities so as to minimize interruption of service,
b. laboratory facilities and equipment,
c. the number and design of chemical feeding equipment (see Section 5.1),
d. materials or proprietary equipment for sanitary or other facilities including any necessary backflow or back-siphonage protection.
A summary of complete design criteria shall be submitted for the proposed project, containing but not limited to the following:
a. long-term dependable yield of the source of supply,
b. reservoir surface area, volume, and a volume-versus-depth curve, if applicable,
c. area of watershed, if applicable,
d. estimated average and maximum day water demands for the design period,
e. number of proposed services,
f. fire fighting requirements,
g. flash mix, flocculation and settling basin capacities,
h. retention times,
i. unit loadings,
j. filter area and the proposed filtration rate,
k. backwash rate,
l. feeder capacities and ranges.
Any deviations from approved plans or specifications affecting capacity, hydraulic conditions, operating units, the functioning of water treatment processes, or the quality of water to be delivered, must be approved by the reviewing authority before such changes are made. Revised plans or specifications should be submitted in time to permit the review and approval of such plans or specifications before any construction work, which will be affected by such changes, is begun.
The reviewing authority may require additional information which is not part of the construction drawings, such as head loss calculations, proprietary technical data, copies of deeds, copies of contracts, etc.