ORD 2134 ORDINANCE NO . l
AN ORDINANCE imposing an infiltration and inflow mitigation charge
on new users who connect to the sanitary sewer system of the City of
Camas .
THE COUNCIL OF THE CITY OF CAMAS DO ORDAIN AS FOLLOWS :
Section I
The Council makes the following findings :
A . The City sewage treatment plant currently operates at fifty ( 50 % ) percent of its rated capacity
during dry weather periods .
B . During periods of wet weather , the sewage treatment plant operates at one hundred and three
( 103 % ) percent of its rated capacity .
C . The increase in use of rated capacity is due to the infiltration and inflow of storm and surface
waters into the existing sanitary sewer system during periods of wet weather .
D . The City has adopted a 1997 Waste Water Facilities Plan that provides for the expansion of
the existing sewage treatment plant by 2001 .
E . Without interim implementation of mechanisms to reduce infiltration and inflow , the City
would be required to restrict new connections to the sanitary sewer system .
F . By adopting an infiltration and inflow mitigation charge , the City is able to raise revenue to
implement measures to reduce infiltration and inflow and thereby allow connections to continue to be
made to the sanitary sewer system .
G . The Council adopts by reference the information set forth in the October 1994 Waste Water
Facility Plan prepared by CH2M Hill as the basis for calculating the infiltration and inflow mitigation
charge .
Section II
Imposition of Charge . There is hereby imposed on every property that connects to the city sewer
system of the City an infiltration and inflow mitigation charge , which charge shall be assessed in
accordance with the rates set forth in Section III of this ordinance .
Section III
Rates :
A . The infiltration and inflow mitigation charge for properties classified as single family and
multi - family shall be as follows :
Ordinance No , Page 2
Single family $ 1 , 012 . 00
Multi - family (per dwelling unit) $ 810 . 00
B . The infiltration and inflow mitigation charge for properties classified as commercial , light
industrial and manufacturing shall be calculated by multiplying $ 5 . 00 per gallon times the projected
average daily flow measured in gallons of the applicant .
Section IV
Collection : The infiltration and inflow mitigation charge shall be paid by the applicant at the time
of issuance of a building permit , site plan approval , application for Waste Discharge or NPDES permits ,
or as a mitigation measure identified by SEPA , but in any event not later than connection to the sanitary
sewer system of the City .
Section V
Revenue Disposition : All revenues collected pursuant to this chapter shall be maintained in a
segregated account in the Water and Sewer Fund and shall be used for the purpose of implementing
measures to mitigate and reduce infiltration and inflow into the sanitary sewer system .
Section VI
Appeal : Any applicant aggrieved by the amount of the infiltration and inflow mitigation charge
found to be required under the provisions of this chapter may appeal to the Board of Adjustment from
such finding by filing a written notice of appeal with the City Clerk within twenty ( 20 ) days from the
time such property owner is given notice of the amount of such charge . The procedures for such appeal
shall be as provided for for appeals of sewer systems development charges as set forth in CMC
13 . 72 . 090 .
Section VII
This ordinance shall take force and be in effect five ( 5 ) days from and after its publication
according to law .
PASSED by the Council and APPROVED by the Mayor this lboo? ' day of October , 1997 ,
SIGNED :
Mayor
ATTEST : ,
Clerk
APPROVED as to form :
City Attorney
' • •.V.�:. . •. :. •.•.•.• :•••. ::.tip• .
CITY aF CAA4- - -
MEMO
TO : Roger Knapp
FROM : Doug Quinn
DATE : September 23 , 1997
SUBJECT : Infiltration and Inflow Mitigation Charge
I am proposing to implement a new charge, applicable to new connections or increases in
flow that affect the City 's treatment plant. I would expect this charge to be an interim
charge until the City 's Waste Treatment Plant is expanded.
As ou m be aware, the City 's treatment plant is at capacity during the peak rainfall
Y aY �'
months due to infiltration and inf low. During dry weather flows, the Wastewater
Treatment Plant operates at about 50 ° o of it 's rated capacity and during wet weather
flows the plant operates at about 103 % of it 's rated capacity. Infiltration and Injlow is a
system -wide problem and affects both new and old sewer systems. Without extra
emphasis placed on the reduction of I&I, the City would be required to place a restriction
on new connections, pending the expansion of the existing plant. The City has started the
process of expanding the plant through the adoption of the 1997 Wastewater Facilities
Plan and would expect the expansion to be complete by the year 2001 .
Using information from the October, 1994, Wastewater 's Facility Plan prepared by
CH2MHi11, I have determined that an approximate charge for I&1' reduction is $S. 00 per
gallon. I would therefore propose the following:
To mitigate the impacts to the City 's Wastewater Treatment Plant, all new connections,
expansions, or actions which result in i
p ncreased flow to the City 's Wastewater Treatment
Plant, will require payment of an I&J reduction charge in the amount of $S. 00 per gallon
based on the projected average dallyflow.
low.
Calculations are as follows:
The charge to a single family dwelling unit will be $ 1, 012. 00.
2 . 25 persons per unit times 90 gallons per customer per day times $5. 00 per
gallon equals $ 1, 012. 00
12 . 25 persons per unit is based on the 1994 Wastewater Facility Plan, Section One, Burke Memorandum
90 gallons per customer per day is based on the 1994 Wastewater Facility Plan
1
The multiple family charge will be $810. 00.
1 . 82 persons per unit times 90 gallons per customer per day times $S. 00 per
gallon equals $810. 00.
Imposition of Fee :
It is my expectation that the fee would be imposed at the time of final plat approval,
issuance of building permit, site plan approval, application for Waste Discharge or
NPDES permits, or as a mitigation measure identified in SEPA .
Please prepare an appropriate ordinance, which would impose this fee based upon the
aforementioned reasons. If you have any questions, please feelftee to give me a call.
c : Mayor Dossett
Lloyd Halverson
Joan Durgin
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2 1 . 8 is based on 1990 census data
2