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<br /> y~r - ~
<br /> ~ ME~'HODOLOGiES:
<br /> City of Eugene Systems Development Charges
<br /> Appendix E
<br /> ~S- et] ,~orwate~~ System Charge Detail
<br /> 1.p Formula
<br /> I
<br /> T e impact analysis for the [storm-sewer] ;~#o~ir~f+~" system is based on square footage of
<br /> i pervwus surface which creates an impact on the fstarm] ~t`~rmwat~er system by land use type.
<br /> Impervious surface is defined
<br /> in Sec~it%r( 7.275, Eugene code; 1971 as "earth surface made impervious by development to vertical
<br /> d wnward penetration by water". Impervious surfaces typically consist of concrete, asphalt and
<br /> r offing materials. The impervious surface of a residential unit is usually the roof, i~~dE~ral«k~:x
<br /> d 'veway and any patio areas. The cost of the existing (storm] ~tor~t~?~?t~r system is used as the
<br /> b sis for determining the SDC.
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<br /> e total - sys
<br /> . R. 'j<Th value of~the tern
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<br /> i esti a
<br /> m ted
<br /> Ito-be~Ft>i8~1-~G;984~ ..a:';#;=.t'?Re<~:<._ ~ti~
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<br /> `^:~""_Mr/~Tet
<br /> :al N~fi~,,+~f.~r,.4~i! . v.~~~1k~nit ,'.'.":'ri'.~~~^#~ak'.~~
<br /> Wiz. ~~_.f,~~?'~:n~U ~ ~ Assessable costs were calculated using the approach
<br /> s 'fled in the City Code. The ~ assesses up to and inducting the first 24 inches of pipe diameter
<br /> a din excess of 60 inches. For pipe over 24 inches in diameter, the city pays a proportion of the
<br /> c st. The non-assessable portion of [stormy system costs
<br /> .:k:.. -k:
<br /> r' Y
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<br /> . provides a detailed breakdown of the cakxalation~' ~ ! of the
<br /> (storm]
<br /> ; SDC. Figure{} illustrates the calculation t of the {storm] ~t
<br /> .
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<br /> r x ,....<:~+..P.~,.:>.. , .fit
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<br /> '1jo determine a cost per square foot of impervious surface, the non-assessable portion ~1~
<br /> of the system cost was first divided by the total impervious acres within the.city
<br /> li ~~r'~s. !The total impervious surface calculated for each development is assumed to contribute to the
<br /> ublic ~ system. The number of aches of impervious surface in each type of land
<br /> se was determined using runoff coefficients cumentiy employed by the sty. The cost per
<br /> i pervious ache is estimated Vii: tit~~ ;x'
<br /> . ~ t~'
<br /> ,.u.~~~...:.._,,,,.•::.:._..:~. _
<br /> ;t . . . >~i The cost
<br /> . , . . k~. :rv.:,~w fn .
<br /> r a s uar~e foot of i ' us surface is calculated ` k ~ ~ _ . cosh; .
<br /> . q,......:.: mpervio . ate`
<br /> ? .t, . )
<br /> Proposed Methodologies: City of Eugene SDCs (Effective March 01, 1997) Page E-1
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