Md. Code Regs. 26.03.02.03

Current through Register Vol. 51, No. 24, December 2, 2024

Section 26.03.02.03 - Water Supply Systems

A. General Plan - Sources of Supply.

(1) The general plan shall show the location of the source or sources of supply, the location of all reservoirs, wells, springs, purification plants, pumping stations, standpipes, elevated tanks, main delivery pipes to the distribution system, and any special structures or appurtenances. These various parts shall be designated either by proper descriptions opposite them or by suitable symbols in the key. The size, depth, and capacity of all reservoirs shall be shown, together with contours, where consisting of natural basins or formed by impounding streams. The elevations of high and low water in the reservoirs shall be indicated, and also the location and elevation of all intakes and valves.

(2) In case a source of supply is a long distance from the main distribution system, a plan drawn to as small a scale as 2000 feet to the inch may be used to show the general location of the sources of supply and the main delivery pipe, together with a profile taken along the pipe line from the source to the point at which it joins the distribution system. In this case, however, the location of reservoirs, wells, purification plants, pumping stations, standpipes, and other structures shall still be shown on plans drawn to the larger scales, and all plans shall be of the same size, or multiples of that size so they can be conveniently folded.

B. Wells - Source of Supply. When deep wells are used as a source of water supply, at least two will be required to serve 100 or more family dwelling units or other water users totalling an equivalent use to that for 100 families. Each well shall have a daily yield equal to, or in excess of, 1 average day's water use by the properties served.

C. General Plan - Distribution System.

(1) A general plan shall be submitted showing all existing or proposed streets within the limits of the municipality or area served by the system (a complete layout of all buildings shall be shown in the case of an institution); the boundary of the municipality or area, the surface elevation at intermediate high and low points within the municipality or area, and at all street intersections, unless the area is relatively level and not more than one pressure zone will be utilized. The location of all water mains, fire hydrants, valves and other fittings, together with sizes of pipe are also to be shown. The surface elevations should be placed in the upper right-hand angle of the street intersections, and where shown at other points should be opposite, either above or to the right of, their respective positions in the street. For relatively level communities or areas, contours, with intervals not exceeding 5 feet, may be substituted for numerical elevations. Proposed water mains shall be shown by heavy solid lines and shall have the sizes placed immediately above or to the left of the line designating the main, the size to be shown in each block, or between all connecting mains. Street names shall be placed outside of the street lines. For major improvements and additions, the concurrence or approval of the National Board of Fire Underwriters may be required.

(2) Contemplated future extensions should be designated by dotted, dark or light lines. Any and all existing utilities shall be shown to the correct location and elevation as determined from the most authentic data available.

(3) A key or legend shall be placed near the title describing the symbols used to designate the various features of the drawing.

D. Watersheds. The watersheds of storage reservoirs and stream intakes may be shown on plans with scales smaller than 1 inch equals 200 feet. The watershed area, in square miles, shall be designated.

E. Dams. If dams are to be constructed, complete detailed plans showing all features of the structures shall be submitted. This shall include the volume of water to be stored at spillway level, the area of the reservoir at spillway level, the tributary drainage area in square miles, and the arrangements for releasing or withdrawing water. Evidence of approval by the Maryland Geological Survey shall be submitted.

F. Wells, Springs, Pumping Stations, Purification Plants.

(1) Plans shall be presented showing:

(a) The location and dry-weather yield of all springs;

(b) The location, depth, and size and yield of all wells;

(c) All connecting piping, valves, metering devices, etc.; and

(d) The layout of pumping stations, together with the arrangement and size of all suction pipes, force mains and valves.

(2) Complete detailed plans of all purification plants shall be submitted, showing all special appurtenances, intakes, tanks, aerators, base exchange units, filters, character and depth of filter media therein, valves, blow-offs, metering devices, chemical application devices, clear-water basins, high and low water elevations of nearby streams, and all features connected with the plants. Plans, elevations, and sections of these parts shall be shown, as may be necessary to supply a complete understanding of the entire installation. When necessary to clarify the review of a project, hydraulic profiles shall be submitted.

G. Information to be Submitted. Information as to the existing or predicted water consumption, the present and future population to be served, the number of proposed services, and the calculations used in determining the sizes, rates of flow, detention periods, capacities, etc., of all treatment and storage units or pumping units shall be submitted in advance of or with the plans. For major works a tabulation may be used. For simple problems a statement may suffice.

H. Extensions.

(1) Plans submitted for extensions to existing systems shall be drawn to sizes and scales as indicated for the general plans, shall show all details as planned for installation, and shall be accompanied by a general or partial plan of the system showing all details as planned for installation, unless the plans have been previously submitted to the Secretary of the Environment. In all cases, they shall show the connections of the proposed extensions to the existing system and enough of the latter from the best data available, to designate their relation to it. Plans for water main extensions will not be approved unless this requirement is met.

(2) Plans for water main extensions shall be for a distance of at least 400 feet or one block in length unless a terminal main is involved.

(3) Plans for the installation of a valve or fire hydrant, for lowering an existing water main, or for other similar minor alterations or additions need not be supplied for review or approval because they do not constitute a material change, and a permit for this work will not be issued.

Md. Code Regs. 26.03.02.03