HomeMy WebLinkAboutResolution No. 4768
RESOLUTION NO. 4768
A RESOLUTION ADOPTING AMENDED SYSTEMS
DEVELOPMENT CHARGE METHODOLOGY FOR
STORMW ATER SYSTEM AND AMENDING RESOLUTION
NOS. 4740 AND 4748.
The City Council of the City of Eugene finds as follows:
A. On September 23, 2002, the System Development Charges (SDC) Methodologies
were adopted by Resolution No. 4740.
B. On January 27,2003, the SDC Methodologies were amended in part by Resolution
No. 4748. Resolution No. 4740 remains in effect except as amended by Resolution No. 4748.
C. Amendments to the SDC Methodology for Stormwater System are needed in order to
adopt revisions to that methodology.
NOW, THEREFORE, based upon the above findings,
BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF EUGENE, a
Municipal Corporation of the State of Oregon, as follows:
Section 1. The Systems Development Charge Methodology for Stormwater System is
amended by revising the following: Appendix F, Sections 1.4 and 2.4; General Methodology Section,
Table 1 and Section 5.0; and Appendix D, as shown on Exhibit A attached hereto.
Section 2. Resolution Nos. 4740 and 4748, are hereby amended as described in Section 1.
Section 3. The City Recorder is requested to append a copy ofthis Resolution to Resolution
Nos. 4740 and 4748.
Section 4. This Resolution shall become effective immediately upon its adoption.
The foregoing Resolution adopted the 28th day of July, 2003.
c~~~
Resolution
, Exhibit A to Resolution No. 4768
Stormwater System Details from Appendix F:
1.4 Stormwater System Cost of Service:
General Formulas
SDC eligible costs
Unit cost per square foot of
impervious surface area
=
Total additional impervious
surface area within UGB (sq. ft)
Reimbursement:
$10,547,707
155,770,560 sq. ft.
=
$0.0677 per sq. ft.
impervious surface area
Improvement:
$11,614,175
155,770,560 sq. ft.
=
$0.0746 per sq. ft.
impervious surface area
Total Unit Cost per Sq. Ft. Impervious Surface Area =
(Reimbursement + Improvement) = $0.0677 + $0.0746 = $0.142
2.4 Stormwater System:
Small Residential
Medium Residential
Small Duplex
Medium Duplex
(building footprint ~ 1,000 sq. ft.)
(building footprint> 1,000 sq.ft. and < 3,000 sq. ft.)
(unit building footprints ~ 1,000 sq. ft.)
(unit building footprints >1,000 sq. ft. and < 3,000 sq. ft.)
Manufactured Home Park
Per space (assumes 1,684 sq. ft. per space)
plus
Per sq. ft. actual impervious surface area, addt'1 common areas
All Other Development
Per sq. ft. actual impervious surface area and/or equivalent
$255.60
$411.80
$511.20
$823.60
$239.13
$0.142
$0.142
Stormwater System Excerpts from General Methodology Section:
Table 1:
Stormwater
Total stormwater unit cost
per sq.ft. of impervious
surface Area = $0.142.
Charges are based on
use. 1-2 Family
development under 3,000
sq.ft have tiered rates
based on est. imp. surface
areas.1-2 Family over
3,000 sq.ft. and Multi-
Family & Non-residential
are based on actual imp.
surface area. Charges for
Mfg. Home Parks are
based on est. imp. surface
area per space plus actual
impervious surface are of
additional common area.
Estimated non-assessable
cost of system-wide
capacity from future
capacity-enhancing
projects as contained in
the Stormwater SDC
Project List and available
existing stormwater
system capacity. .
Design standards currently
used by the City to handle
a Five-year storm.
Reimbursement fee
~ 47%
Improvement fee
~ 53%
Charges for new (all) or
expanding (multi-family,
non-residential)
development are basoo on
estimated or actual
impervious surface areas
and the total stormwater
unit cost per square foot.
Stormwater impact not
attributable to impervious
surface area will be
charged based on
equivalent surface area
and the total stormwater
unit cost per square foot.
5.0 Stormwater System
The stormwater SDC is based upon impervious surface area (e.g., rooftops,
driveways, sidewalks, parking lots, patios, and other non-porous surfaces). The
detailed formulas for calculating the stormwater SDC unit cost (rate) per square foot
of impervious surface area is set forth in Appendix D. The stormwater SDC is
determined by multiplying the applicable rate by the unit of measure for the proposed
development type. The costs per unit of measure and resulting rates can be found in
Table 12 and the fee schedule in Appendix F.
Where the stormwater SDC is a fixed amount per dwelling unit or space, it shall be
determined by multiplying the applicable rate per dwelling unit or space times the
number of units or spaces plus, for manufactured home park development, the. SDC .
is based upon the impervious surface area of all additional common areas times the
stormwater unit cost per square foot of impervious surface area. Where the
stormwater SDC is not a fixed amount per dwelling unit or space, it shall be
determined by multiplying the rate per square foot of impervious surface area times
the total impervious surface area of the proposed development. Where a
development creates impact not attributable to impervious surface area, the
stormwater SDC shall be determined by evaluating equivalent impervious surface
area, multiplied by the rate per square foot of impervious surface area.
METHODOLOGY:
City of Eugene Systems Development Charges
Appendix D
Stormwater System Charge Detail
1.0 Formula
The impact analysis for the stormwater system is based on square footage of impervious
surface, which creates an impact on the stormwater system by land use type. Impervious
surfaqe is defined in section 6,406 Eugene code, 1971 as "any hard surface area which causes
water to run off the surface in greater quantities or at an increased rate of flow from conditions
pre-existing to development. Common impervious surfaces include, but are not limited to,
rooftops, walkways, driveways, parking lots, or concrete or asphalt surfaces." The estimated
non-assessable cost of the system-wide capacity from future capacity-enhancing projects, as
contained in the Stormwater SOC-Eligible Project List, and the estimated available capacity in
the existing stormwater system projected to be used by new development is used as the _basis
for determining the stormwater SOC.
The stormwater SOC is comprised of an improvement fee and a reimbursement fee, as new
development will require the construction of additional system capacity as well as the use of
available capacity in the existing system. The per unit cost of additional capacity for the
improvement fee is based on the value of the system-wide capacity of future capacity-
enhancing projects (current planned projects are listed in the Stormwater SDC-Eligible Project
List, Table 13) divided by the total projected impervious surface area that will be added by new
development at build-out within the Urban Growth Boundary (UGB). The per unit cost of
existing capacity for the reimbursement fee is based on the value of available system-wide
capacity within the existing system projected to be used by new development divided by the
total projected impervious surface area that will be added by new development at build-out
within the UGB.
The value of the future stormwater system is based on the estimated costs of planned future
capacity-enhancing stormwater projects contained within stormwater plans and the Capital
Improvement Plan (CIP). Of that total value, the SDC-eligible component is attributable to those
portions of future projects that are non-assessable and capacity-enhancing and related to the
demands offuture development; i.e. add new capacity for new users.
The total value of the existing system is estimated based on the replacement cost of the
stormwater system components, which include both piped system and open channel system
components. Assessable costs are excluded from the SDC-eligible existing system costs.
Assessable costs are determined using the approach specified in the City Code. The city
assesses up to and including the first 24 inches of pipe diameter or equivalent capacity. The
non-assessable portion of stormwater system costs (SDC eligible costs) is based on
replacement costs minus assessable costs. The portion of non-assessable existing system
value allocated to new development (SDC-eligible value) is established by determining the
percent of piped system and open channel system capacity projected to be used by new
development. The use of capacity of the existing system is estimated with use of llydraulic
modeling to identify existing available capacity (based on existing land use and flow data) and
expected future conditions (based on Metro Plan designations).
The total unit cost per square foot of impervious surface area is the sum of the per unit costs of
. additional capacity of the improvement fee and reimbursement fees. Table 12 provides a
. detailed breakdown of the calculation and numerical supporting data of the stormwater SOC.
Figure T illustrated the calculation formula of the stormwater SDC. The stormwater SOC rates
per unit of capacity can be found in Appendix F in the current adopted SDC fee schedule.
~.o Single Family Dwelling and Duplex Rates
The stormwater SDC for single family residential development is comprised of three rate
categories: Small residential with a building footprint of 1,000 square feet or less; Medium
residential with a building footprint of greater than 1,000 but less that 3,000 square feet; and
Large residential with a building footprint of 3,000 square feet or more. Building footprint is
defined as the first floor area. plus attached or detached garage or carport. For the Small and
Medium residential rate categories, an estimated average impervious surface area (square feet)
specific to each cafegory is multiplied by the current total stormwater SDC rate per square foot
to determine the appropriate single-family residential stormwater SDC flat rate per dwelling unit.
For the Large residential category, the stormwater SDC is determined by multiplying the actual
impervious surface of the total proposed building site by the current total stormwater SDC unit
cost per square foot. The stormwater SDC for' a duplex is calculated as two times the
appropriate stormwater SDC flat rate of either a Small or Medium residential category. Duplex
units equal to or over 3,000 square feet each are treated as Large residential. Details of the
stormwater SDC analysis are provided in Table 12. Rate formulas, calculations, and fee
schedule are provided in Appendix F.
. 3.0 Manufactured Home Park Rates
Manufactured home developments are charged a flat rate per individual space based on the
estimated average impervious area for a doublewide manufactured home, plus any additional
common area impervious surface (e.g., clubhouse, private streets). To determine the amount of
stormwater SDC attributable to the proposed spaces in the park, the total number of proposed
spaces is first multiplied by the estimated average impervious surface area (square feet) per
space, the results of which are then multiplied by the current total stormwater SDC unit cost per
square foot. To determine the amount of stormwater SDC attributable to all additional common
area impervious surfaces within the park, these areas will be measured separately and the sum
of this additional actual impervious surface area (square feet) will be multiplied by the current
total stormwater SDC rate per square foot. Details of the stormwater SDC analysis are provided
in Table 12. Rate formulas, calculations, and fee schedules are provided in Appendix F.
4.0 Multi-Family and Non-Residential Rate
For all uses not listed in. sections 2.0 and 3.0 above (e.g. multi-family, commercial, industrial) or
whenever this Appendix D makes reference to a rate per square foot of impervious surface area,
the stormwater SOC collected is determined to be the current stormwater SDC rate per square
foot of impervious surface area as adopted in the SDC fee schedule located in Appendix F.
5.0 Stormwater Impacts Not Attributable to Impervious Surface Area
For all uses not listed in sections 2.0, 3.0, and 4.0 above, where any development type creates
an impact through discharges to the public stormwater system (as allowed by EC 6.610) which
are not attributable to creation or modification of impervious surface area, will have stormwater
SDCs calculated by evaluating the equivalent impervious surface area which would generate a
similar impact.
6.0 Stormwater System SDC Impact Reduction Criteria
Reduction or elimination of stormwater which otherwise would be discharged into the public
stormwater system may result in a corresponding reduction of stormwater SDC collected at the
time of building and development permit issuance. Reduction of the stormwater SDC will be
proportional to the reduction of runoff entering the public system from the fully developed site.
(Note: detention facilities are not eligible for stormwater SDC impact reduction.) A 100%
reduction in the stormwater SDC will be granted only for the complete containment and
management of all runoff from the site that would otherwise directly or indirectly enter into the
City's public stormwater system. Runoff discharged into an area that does not ultimately enter
the City's public stormwater system constitutes acceptance of responsibility for compliance with
any state or federal regulations that apply to the area or body of water receiving the runoff. To
be eligible for the impact reduction, the owner must guarantee that the system will.function as
intended.
6.1 Single-Family Development (SFD) and Duplex Development
Because stormwater SDCs for SFDs and duplexes are based on estimated average
amounts of impervious surface areas, these building can qualify only for one of two
impact reduction rates:
a)
100% SDC reduction for complete elimination and management of runoff from
the site entering the public system or discharging into an area which ultimately
enters into the public system; or
b)
50% reduction for partial reduction and management of runoff from the site
entering the public system regardless of the amount of reduction.
The SDC reduction will be granted after review and approval by the City Engineer of
construction drawings, calculations, and other supporting documents prepared by a
licenses Civil Engineer. demonstrating how the reduction in runoff will be achieved,
accompanied by a site plan showing the proposed mitigating facility and locations of
private and public stormwater facilities currently in use within and adjacent to the site.
6.2 Multi-family, Commercial, Industrial, and other Nonresidential Development
Stormwater SDCs for these uses will be reduced proportional to the reduction in total
stormwater runoff entering the public stormwater system from the fully developed site.
(Total stormwater runoff includes both runoff from the site in its natural condition and any
increase due to construction of impervious surfaces). The SDC reduction will be granted
after review and approval by the City Engineer of a report submitted by a licensed Civil
Engineer which includes a site plan showing the proposed mitigating facility and
locations of private and public stormwater facilities currently in use within and adjacent to
the site, existing natural drainage courses or other sources of water entering. the site.
Construction drawings, calculations, and other supporting documents demonstrating
how the reduction in runoff will be achieved and listing proposed maintenance
operations with a maintenance schedule.
FIGURE 7
Stormwater System
Capital Project -
Based Methodology
System Value .
(SDC-Eligible Costs)
Impact Measurement
~ Improvement Fee
Future capacity-enhancing cost - non SDC
eligible cost
~ Impervious Service
~ Reimbursement Fee
Replacement cost - non SDC-eligible cost
Formula:
Cost of Service
(Unit cost per square foot)
SDC-eligible cost
Additional impervious
surface area within UGB
=
Cost per square
foot of impervious
surface area
Formula:
Total Cost of Service
(Unit cost per square foot)
Improvement Unit Cost = Reimbursement Unit Cost
NOTE: The costs per unit of measure, can be found in Table 12 and the SDC fee schedule in Appendix F.
TABLE 12
11. Existing Stormwater Drainage System Value & SDC-Eligible Costs
Total Re lacement Cost - Existin Pipe S stem
Open Channel S stems
(Reimbursement Fee)\
$213,564,937
$61,046,330
4.27%
2.34%
12. Future Stormwater System SDC-Eligible Project Costs
13. Stormwater System Calculation Details
Sin
ervious surface area
Medium Residential
(building footprint >1,000 sq. ft. and < 3,000 sq.ft.)
1,800 sq. ft.
2,900 s . ft.
1)80 sq. ft.
(building footprint < 1.000 sq. ft.)
14. Calculation of SOC.
rovement Fee
[$11,614,175 /155,770,560]
Small Residential SDC (building footprint < 1,000 sq. ft.)
Medium Residential SDC (building footprint >1,000 sq. ft. and < 3,000 sq.ft.)
Small Duplex SDC (unit building footprints < 1,000 sq. ft.)
Medium Du lex SDC (unit building footprints >1,000 sq. ft. and < 3,000 sq. ft.)
Mfg. Home Park SDC per Space portion of total charge
*See Appendix F for complete rate schedule.
[1,800 sq. ft. x $0.142]
[2,900 sq.ft x $0.142]
,
[$255.60 x 2]
[$411.80 x 2]
[1,684 sq. ft. x $0.142]
$255.60
$411.80
$511.20
$823.60
$239.13
TABLE 13
City of Eugene
2003 Stormwater SDC-Eligible Project List
Martin Drive Pipe Improvements (02-07 CIP) $93,000 $93,000
Mt. Cavalry Pipe Improvements $763,200 $185,643
Frederick Court Pipe Daylight $118,300 $54,418
3rd Avenue Pipe Improvements $2,155,500 $689,760
Morse Park Ranch Park Pipe Improvements $1,054,500 $115,995
Laurelwood Flood Control FaclPipe Imps $2,008,400 $301,260
Jackson Street Pipe Improvements $77,400 $19,350
indsor Circle Pipe Improvements $919,000 $590,786
est Hawkins Lane Water Quality Facility $625,300 $506,195
Bell Avenue (Increase Pipe Sizes Along) $794,600 $365,516
Empire Park Pond Retrofit $385,000 $77,000
Royal Node Stormwater Infrastructure $1,400,000 $1,400,000
Greenhill Tributary Storm Improvements Ph 2 $374,000 $127,500
Greenhill Tributary Water Quality Facility $748,800 $224,640
Roosevelt Channel- Culvert Improvement $135,900 $42,916
-1 Main Channel Culvert & Open Waterway Improvements $514,800 $82,368
Lynnbrook Drive Open Waterway & Culvery Improvements $482,400 $144,720
Spring Creek Bridge Construction & Waterway Improvements $139,300 $32,039
Sanders Street Water Quality Facility $747,300 $37,365
Spring Creek Drive Water Quality Facility $236,600 $47,320
Kirsten Street Pipe Improvements $383,000 $111,070
Hunsacker - Open Channel Improvements (02-07 CIP) $398,000 $239,000
Lenox/Salty - Culvert Replacement (02-07 CIP) $172,000 $103,000
Hunsacker Culvert Replacement (02-07 CIP) $26,000 $16,000
Division Avenue Tip-Up Pipe Replacement $10,900 $2,507
Irvington Drive Water Quality Facility $653,800 $91,532
St. Peter School Culvert Replacement $54,600 $16,380
River Point Pond Outlet Channel $373,300 $153,053
Gilham Road System Culvert Replacement $27,000 $27,000
Gilham Road System Water Quality Facility $653,900 $65,390
scot Park Open Waterway Modification $72,200 $47,652
3rd-4th Connector Stormwater Improvements (02-07 CIP) $120,000 $120,000
Beaver St & Hunsaker Ln Stormwater Improvements $50,000 $50,000
Greenhill Rd Stormwater Improvements $100,000 $100,000
Irvington Drive - Stormwater (02-07 CIP) $100,000 $100,000
Kinney Park Flow Diversion & Restoration $620,000 $458,800
River Road - Stormwater (02-07 CIP) $50,000 $50,000
Royal Ave., Terry to Greenhill $100,000 $100,000
Services for New Development ($100,000/year) $3,400,000 $.3,400,000
Streambank Stabilization ($ varies/year) $4,900,000 $1,225,000
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