§ 600 — Definitions

Section 600. - Definitions.

As used in this chapter, the following words and phrases shall have the meanings given herein: A. House sewer shall include all sewer lines carrying sewage from individual dwellings or places of business to the lateral lines. B. Lateral sewer shall include all gathering sewer lines carrying sewage from the house sewer lines to the sub-main or main sewer lines. No lateral sewer shall be less than eight (8) inches in diameter, except as approved by the Director. C. Adequate lateral shall mean any sewer constructed as an "excess capacity main" when it is utilized as a lateral by the property abutting thereon. The value of the benefit to such abutting property shall be defined as the amount equal to the proportionate cost of an eight (8) inch sewer to that of the sewer constructed as an "excess capacity main." This amount shall be equal to four (4) times the cost of the "excess capacity sewer" per inch of diameter per foot of length that it abuts the property along either side of the sewer, and shall be in addition to the "allowable recovery per thousand gallons per day capacity" for each thousand gallons of capacity utilized by the abutting property. D. Sub-main sewer shall include all sewers eight (8) inches, ten (10) inches or twelve (12) inches in diameter, which serve to convey sewage from lateral sewers to a main sewer. E. Main sewer shall include all sewers carrying sewage gathered from a number of lateral sewers or sub-main sewers to a central plant for treatment. F. Entire drainage area shall mean that area as determined by the City of Tulsa and as established from any point on any existing sewer of the sewerage system of the City of Tulsa such that sewers flowing by gravity may be extended from such point to collect sewage originating from each and every tract of land within such area. G. Required capacity shall mean the millions of gallons per day capacity required for any sewer to serve the entire drainage area as determined by the City of Tulsa. The required capacity in millions of gallons per day shall be equal to the product of the drainage area in acres raised to the exponent 0.8169 multiplied by the constant number 0.01467. (Qm = A 0.8169 × 0.01467), where Qm equals capacity in millions of gallons per day and A equals area in acres. H. Sewer capacity shall mean the quantity of sewage in thousands of gallons per day that can be conveyed through a given sewer flowing full on a predetermined grade. This capacity shall be equal to the product of the constant number 23,000 multiplied by the diameter of the sewer in feet raised to the exponent 2.667, and that product multiplied by the square root of the grade of the sewer in feet per thousand feet. I. Excess capacity main sewer shall include any privately financed sewer, larger than twelve (12) inches in diameter, required to serve an entire drainage area and having capacity in excess of the capacity actually required to meet the needs of the owner. J. Excess capacity system shall include any system of sewers containing one (1) or more excess capacity mains whose network of sewers corresponds roughly but not necessarily coincidental with the natural surface drainage area. K. Excess capacity contract shall include any contract covering the construction, use and reimbursement of excess capacity mains. L. Excess capacity fee shall mean the amount of money to be paid by the user of any excess capacity main to the City of Tulsa for the use and benefit of the owner of an excess capacity main. Such fee shall be based upon the cost of providing within the excess capacity sewer the thousands of gallons per day capacity required by any user and shall be equal to the amount as determined by the "allowable recovery per thousand gallons per day capacity" for each and every one thousand (1,000) gallons per day capacity required by the following: 1. Each lot or parcel of land on which a single residence is located or is to be located shall require one thousand two hundred (1,200) gallons per day capacity; 2. Each motel unit, hotel unit or other transient living unit shall require six hundred (600) gallons per day capacity; 3. Each trailer space or apartment living unit shall require eight hundred (800) gallons per day capacity; 4. Each school shall require a capacity equal to four hundred (400) gallons per day for each student; 5. Each church shall require a capacity equal to two hundred (200) gallons per person, per day, based on the number of persons its main assembly hall will accommodate; 6. Each hospital shall require a capacity of seven hundred fifty (750) gallons per day for each bed; and 7. Any other use not specified herein shall require a sewer capacity equal to five and two tenths (5.2) times its average water use for sewage disposal purposes. M. Allowable cost shall mean the aggregate cost of any excess capacity main in accordance with the following: 1. The owner's actual cost of construction as determined in the manner of any public contract providing for the advertisement of bids, award of contracts and compliance with the terms of contract as required by the City of Tulsa, but, if not awarded to the low bidder, limited to the amount of cost as calculated according to the bid of the low bidder; 2. Engineering fees of five percent (5%) of construction costs; 3. City inspection and flushing fees; and 4. The actual cost of advertising and recording. N. Allowable cost per thousand gallons per day capacity shall mean that unit cost as determined by dividing the "allowable cost" by the "required capacity." O. Theoretical collection factor shall mean the percentage that the theoretically required capacity of any sewer bears to the volume of sewage which would result if each acre within the entire drainage area served by the sewer contributed four thousand (4,000) gallons per day simultaneously. The "theoretical collection factor" shall equal 0.8005 - 0.2164 Log 10X expressed as a percentage, wherein X is the drainage area in thousand of acres. P. Actual collection factor shall have the same meaning as the "theoretical collection factor," except that the actual capacity of the sewer as constructed may vary within limits of acceptable tolerance as approved and as predicated by available grades, pipe sizes and other considerations. Q. Recovery factor shall mean the factor to be applied to the allowable cost on any "excess capacity contract" of the capacity to be utilized by users other than the owner. The "recovery factor" shall be equal to the following: R equals 1.5790454 - 0.5790454 C, wherein R equals Recovery Factor and C equals Theoretical Collection Factor. R. Allowable recovery shall mean that amount of money established by the product of the "allowable cost" multiplied by the "recovery factor." S. Allowable recovery per thousand gallons per day capacity shall mean that unit cost as determined by dividing the "allowable recovery" by the "required capacity," and that quotient multiplied by the "actual collection factor." The "actual collection factor" may not exceed the "theoretical collection factor" in any computation. T. Private sewer districts shall mean any system of one (1) or more sanitary sewers, other than house sewers, constructed within or outside the corporate limits of the City of Tulsa, which includes any excess capacity sewer and is connected to the sewerage system of the City of Tulsa. The physical boundaries of such "private sewer district" shall be as established and defined by legal description, setting forth the actual tracts of land served thereby, whether platted or unplatted. Such tracts of land as described shall be exempt from subsequent assessment for sewer construction. Off-site excess capacity sewers shall not be included within the boundaries of the district.

(Ord. Nos. 10629, 20623)