Shasta Lake Municipal Code Art. V Rates and Charges

Each premises connected to or required by this chapter to be connected to the wastewater system shall pay a monthly wastewater service charge per dwelling unit. The monthly service charge for a dwelling unit shall be determined by resolution of the city council.

(Amended during 1998 codification; prior code § 13.24.010)

(Ord. No. 25-308, § 1, 12-2-2025)

Editor's note— Ord. No. 25-308, § 2, adopted Dec. 2, 2025, repealed § 13.16.590, which pertained to rates for service, and derived from the prior code, § 13.24.020; Ord. No. 94-37; Ord. No. 95-59; Ord. No. 97-81, § 1; Ord. No. 97-86, §§ 1, 2, 4—7; Ord. No. 02-147, §§ 1, 3—5, Exh. A; Ord. No. 04-162, §§ 1, 3, 4; Ord. No. 06-171, § 1; Ord. No. 07-186, § 1; Ord. No. 09-202, § 1, adopted July 7, 2009; Ord. No. 14-235, § 1, adopted Sept. 2, 2014; and Ord. No. 20-281, § 1, adopted Apr. 21, 2020.

An industrial surcharge shall be paid to the city annually, in lieu of a service charge following the fiscal year in which charges accrue, by those industrial wastewater dischargers whose contribution of flow, chemical oxygen demand, suspended solids or peak flow create costs in excess of their annual sewer service charge. The treatment surcharge shall be based upon the sewerage system's total maintenance, operation and capital expenditure for providing industrial wastewater collection, treatment and disposal services.

(Amended during 1998 codification; prior code § 13.24.030)

A. The annual industrial wastewater treatment surcharge shall be computed by the following formula:

Surcharge = a (V) + b (COD) + c (SS) + d (M)P - T

Where:

Surcharge = Net annual industrial wastewater treatment in dollars. No refund will be made if a negative number results.

V = Total annual volume of flow, in millions of gallons.

COD = Total annual discharge of chemical oxygen demand, in thousands of pounds.

SS = Total annual discharge of suspended solids, in thousands of pounds.

P = Peak discharge rate over a 30-minute period occurring between the hours of 8:00 a.m. and 10:00 p.m. and determined by averaging a maximum of 10 substantiated peak-flow rate measurements of the accrual year in gallons-per-minute. Values of "P" less than 10 gallons-per-minute shall be considered equal to zero.

a, b, c = Unit charge rates adopted annually and d by the city based upon the projected annual total costs for wastewater collection, treatment and disposal, in dollars per unit, as described in Section 13.16.620.

M = A multiplying factor accounting for increased city costs due to high ratios of industrial discharger peak to average flow rates (P/A).

A = Average discharge rate, determined by dividing "V" by the total annual hours of operation or working time for the industrial discharger, converted to gallons-per-minute. (See "M.")

T = Total annual service charge paid on a monthly basis to the city for collection, treatment and disposal of industrial wastewaters. These charges are set by the city by resolution and are based upon the discharger's flow, organic strength and the suspended solids in the stream. The basic service charge shall apply when the COD does not exceed 500 mg/l and the suspended solids do not exceed 250 mg/l. The flow shall be determined by the metered water consumption; or, if in the opinion of the city engineer the water use as measured by the water meter does not fairly represent the total flow, he or she may require the discharger to meter and record his or her flow at the point where it discharges to a city sewer.

B. The quantities for yearly flows, COD, suspended solids and peak-flow rates used in the surcharge formula may be established by engineering estimation, short-term sampling, analysis and flow sampling, analysis and flow measurement extrapolated to a yearly total, or by extensive sampling, analysis and flow measurement, all as approved by the city. The city shall set the minimum requirements for sampling, analysis and flow measurement by the discharger necessary to establish quantities to be used in the above formula.

C. If the industrial discharger elects or is required by the city to discharge the peak rates of industrial flow during the nighttime hours between ten p.m. and eight a.m., the flow discharge shall be made approximately uniform during these ten nighttime hours.

(Amended during 1998 codification; prior code § 13.24.040)

A. Unit charge rates "a," "b," "c" and "d" in the industrial wastewater treatment surcharge set out in Section 13.16.610 shall be established annually in accordance with Section 13.16.610.

B. Appropriate unit charge rate parameters for flow, chemical oxygen demand and suspended solids, respectively designated "a" (in dollars per million gallons), "b" (in dollars per one thousand (1,000) pounds of COD), and "c" (in dollars per one thousand (1,000) pounds of suspended solids), shall be determined by the following method:

1. The total capital outlay for construction of sewerage facilities, including debt principal and interest for the past fiscal year, shall be totaled and distributed among the three parameters in accordance with the city's determination of the percentage of the total existing capital facilities of the sewerage system predominately related to each parameter.

2. The total operation and maintenance costs of the system shall be totaled for the past fiscal year and distributed among the three parameters in accordance with the city's determination as to which charges are predominately related to each parameter.

3. The sum of the capital costs, and operation and maintenance costs determined for each parameter by subsections (A)(1) and (A)(2) of this section shall be divided by the projected yearly total volume of wastewater and weight of COD and suspended solids to be treated by the sewerage system for the past year in order to obtain the unit charge rates "a," "b" and "c" for the system.

B. The unit charge rate related to peak flow rate and designated "d" (in dollars per gallon per minute of peak flow) shall be determined by the following method:

1. The total nondepreciated value of the historic capital investment in the system shall be divided by the total peak hydraulic capacity of all treatment facilities in the system to determine a unit cost per million gallons per day of peak flow capacity.

2. The unit cost determined in subsection (B)(1) of this section shall be amortized over thirty (30) years at six percent interest and converted to a gallon-per-minute basis to obtain the unit charge rate "d."

(Amended during 1998 codification; prior code § 13.24.050)