Wis. Admin. Code § PSC 187.05
(3) Where the developer is paying, or has paid, all or part of the cost of a sewer main extension, part of the contribution may be refundable. If a person whose property is outside of the development connects a sewer main extension to a developer-financed sewer main within three years after the date of completion of the developer’s sewer main installation, within 60 days of connection the person shall pay to the developer the following:
(a) Calculation of sewer main extension refund. The developer shall be refunded a percentage of the costs of the original sewerage project calculated using the Diameter Squared, Length of Sewer Main method, where
Refund ($) = C × P
C = the cost or portion of the cost of the original sewerage project paid or to be paid by the developer ($)
P = [L2 × (D2)2 ] ÷ [L1 × (D1)2]; when P ≥ 0.50, set P = 0.50 (i.e. P may never be greater than 0.50 in calculating the refund)
L1 = Lineal feet of sewer main installed with the original sewerage project
D1 = Diameter in inches of sewer main L1
L2 = Lineal feet of sewer main installed with new sewer main extension
D2 = Diameter in inches of sewer main L2
Note: Where multiple sewer main diameters are involved, calculating “P” requires summing the individual products of each length of sewer main multiplied by its respective diameter squared.
History: Cr. Register, August, 1999, No. 524, eff. 9-1-99; correction in (1) made under s. 13.93 (2m) (b) 7., Stats., Register April 2007 No. 616.