The City shall set sewer use rates which are adequate to meet all costs incurred for operation, maintenance, replacement and debt retirement of the wastewater collection system, treatment plant and appurtenances to those facilities. Rates for sanitary sewer service, debt retirement and additional charges shall be calculated using the following equations.
(a) Operation, Maintenance, Replace (O M & R).
The following equation shall be used to establish the monthly charge for O M & R.
A = B C WHERE: A = Monthly charge for O, M & R (Cost per 100 cubic feet). B = City's annual cost of operation, maintenance and replacement for the wastewater collection system and treatment plant.
C = Total annual metered flow through residential, commercial, industrial, government and institutional flow meters (100 cubic feet). |
(b) Debt Retirement.
The following equation shall be used to establish the monthly charge for debt retirement:
D = E F WHERE: D = Monthly charge for debt retirement (cost per 100 cubic feet). E = City's annual debt payment for wastewater treatment plant and collection system improvements.
F = Total annual metered flow through residential, commercial, industrial, governmental and institutional flow meters (100 cubic feet). |
(c) Additional Charges. Additional charges will be levied against users discharging wastewater in excess of normal domestic waste strength. Additional charges for extra-strength wastewater shall be based on the following equations:
(1) BOD. G = I J WHERE: G = Average O, M & R cost for BOD removal. H = Annual O, M & R cost of wastewater treatment plant only. I = 0.30 x H = Annual O, M & R cost associated with BOD removal. J = Total pounds of BOD entering the wastewater treatment plant annually. The BOD surcharge will be based on the users total monthly discharge in excess of 300 mg/l as defined for normal strength domestic waste. BOD surcharge will include monitoring and surveillance charges. (2) Suspended Solids. K = L M WHERE: K = Average O, M & R cost for suspended solids removal. H = Annual O, M & R cost of wastewater treatment plant only. L = 0.35 x H = annual O, M & R cost associated with suspended solids removal. M = Total pounds of suspended solids entering the treatment plant annually. |
The SS surcharge will be based on the users total monthly discharge in excess of 250 mg/l as defined for normal strength domestic waste. SS surcharge will include monitoring and surveillance charges.
(Ord. 106-94. Passed 10-3-94.)