HomeMy WebLinkAboutPacket, Pre PLANNER 7/12/2021Pre -Submittal Meeting
Development and Public Works Department
Reem 61
PRE -SUBMITTAL MEETING DATE:
Tuesday, July 20, 2021
11:00 a.m. - 12:00 p.m.
DPW Conferenee Room 616
Pre -Submittal (Site Plan Review) #811 -21 -000175 -PRE 811-20-000124-PROJ Ridgeview
Gardens LLC
Assessor's Map: 17-02-33-32 TL: 3800
Address: 5024 Main Street
Existing Use: Vacant/ zoned HDR
Applicant has submitted proposal to construct a 54 -unit residential development.
Meeting: Tuesday, July 20, 202111:00 — 12:00 via MS Teams
SITE
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VICINITY MAP
811 -21 -000175 -PRE Pre -Submittal Meeting
17-02-33-32 TL 3800
West of W Street, north of Main Street
Ridgeview Gardens, LLC
I
City of Springfield
Development & Public Works
225 Fifth Street
Springfield, OR 97477
Site Plan Review
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Revised 1/7/14 KL
1 o 11
Owner Signatures
This application form is used for both the required pre -submittal meeting and subsequent
complete application submittal. Owner signatures are required at both stages in the application
process.
An application without the Owner's original signature will not be accepted.
The undersigned acknowledges that the information in this application is correct and
accurate for scheduling of the Pre- Submittal Meeting. If the applicant is not the
owner, the owner hereby grants permission for the applicant to act in his/her behalf.
I/we do hereby acknowledge that I/we are legally responsible for all statutory
timelines, information, requests and requirements conveyed to my representative.
Owner:
i
Date: %/��a /
SlgnattFfe
I represent this application to be complete for submittal to the City. Consistent with the completeness check
performed on this application at the Pre -Submittal Meeting, I affirm the information identified by the City as
necessary for processing the application is provided herein or the information will not be provided if not otherwise
contained within the submittal, and the City may begin processing the application with the Information as
submitted. This statement serves as written notice pursuant to the requirements of ORS 22].1]8 pertaining to a
complete application.
/e� ,� Date: % 2
Signature ''T
Print
Revised 1/7/14 KL 2 of 11
KENNETH A PAULSEN ARCHITECT
5638 S.W. HAINES ST. PORTLAND, OREGON 97219 (503) 245-6540
City of Springfield July 7, 2021
Attn: Shannon Morris
Development Center
225 Fifth Street
Springfield, OR 97477
TRANSMITTAL
RE: Site Plan Review for Ridgeview Gardens Apartments
Enclosed, please find:
1. Application fee check for Pre -Submittal Meeting ($428.00)
2. Site Plan Application Form
3. Narrative
4. Copy of Deed (none transmitted in this transmittal — to be forwarded.)
5. Copy of Site Plan Reduced to 8'/" x 11"
6. State of Federal Permits (none transmitted in this transmittal)
7. Completed Scoping Sheet
B. Four Copies of plan sets consisting of.
a. Site Plan cover sheet A1.1 July 7, 2021
b. Site Plan Al2 July 7, 2021
c. Site Lighting A1.5 July 7, 2021
d. Landscape Plan A1.6 July 7, 2021
e. Grading & Storm Drain C2.0 November 2, 2020
f. Utility Plan C2.1 November 2, 2020
g. Paving Plan C2.2 November 2, 2020
h. Civil Details C3.0 November 2, 2020
i. Civil Details C3.2 November 2, 2020
9. Drainage Memorandum Report
10.Geotechnical Engineering Report
These are transmitted for your use in processing our Pre -Submittal Meeting Application.
Sincerely Yours,
Ken Paulsen, Architect
KENNETH
5638 S.W. HAINES ST
City of Springfield
Development & Public Works
225 Fifth Street
Springfield, OR 97477
A PAULSEN ARCHITECT
PORTLAND, OREGON 97219 (503) 245-6540
RE: Site Design Review for Ridgeview Gardens Apartments
July 7, 2021
We are proposing a 54 unit Apartment complex at 5024 Main Street in Springfield. The
apartment units are a mix of 3 bedroom / 2 bathroom units and 2 bedroom / 2 bathroom
units at the ratio of 1:2 — twice as many 2 bedroom 12 bathroom units. We're also
proposing parking to comply with code requirements plus approximately 50%.
This narrative is submitted to provide a commentary on design issues related to the
Springfield Development Code. The comments address various issues in section 3.2-
240 Multi -Family Design Standards. Our intent is to continue with a Type 11 procedure,
which is very important to us.
1. Building Orientation Multi -unit developments, when abutting a private, local, collector, of
arterial street that has existing or planned on -street parking, shall have
Building Oriented to the street along a minimum of 50 percent of the site's frontage (See
Figure 3.2-M). The "orientation" standard is met when all of the following criteria are
met:
a. Primary building entrances shall face the street;
b. The front of the buildings shall be within 25 feet of the front lot/parcel
line,
EXCEPTION: Open, murtyard space in excess of 25 feet may be placed in front
of building entrances. Open courtyard space is defined as usable, hard -surfaced
space with pedestrian amenities including benches, seating walls or similar
furnishings.
C. Off-street parking or vehicular circulation shall not be placed between
buildings and streets used to comply with this standard;
d. Wetlands, slopes over 15 percent as specified in Section 3.3-500, and
wooded areas protected by Section 5.19-100, shall not be counted as "frontage"
for determining required building orientation. For example, if jurisdictional
wetlands and/or wetland buffer occupy 100 feet out of a total of 400 feet, then
only 300 feet is counted as "frontage" for determining required building
orientation. In this example, 150 feet (50 percent) is the required amount of
frontage to meet the building orientation requirement.
Springfield
July 7, 2021
Page 2 of 11
Comment: Our buildings front on private drives with parking and are oriented to those
drives. The primary entrances orient toward those streets and are within 25 feet. This
property is a flag lot, with a 205' long flag pole, the frontage on Main Street is only 40'-0"
wide.
We are proposing a courtyard that will include a stormwater treatment feature. An
existing parking lot serving NW Community Credit Union separates this development
from Main Street.
2. Building Form. New multi -unit construction shall comply with the following
building form standards (See Figure 3.2-N).
a. Structures that have 1 or 2 stories shall not have continuous horizontal
distance exceeding 160 feet (measured from end wall to end wall).
EXCEPTION. As specified in Subsection 3.d., below, structures that have 3 or
greater stories shall not have a continuous horizontal distance exceeding 120
feet (measured from end wall to end wall);
b. Roofs shall have gable, hip, or gambrel forms (minimum pitch 3 to 12)
with at least a 6 -inch overhang;
C. A minimum of 15 percent of the front facade (area measurement) shall
contain windows or doors. All windows and doors shall provide 44nch trim or be
recessed (i.e., into the front fagade) to provide shadowing.
d. Garages attached to living units and accessed from the street (front
setback) shall be reeessed at least 4 feet behind the front facade of a dwelling
structure; and
e. Exterior building elevations shall incorporate design features including
offsets, balconies, projections, window reveals, or similar elements to preclude
large expansions of uninterrupted building surfaces. Along the vertical face of a
structure, the features shall occur at a minimum of every 30 feet, and on each
floor shall contain a minimum of 2 of the following features:
f. Recesses (e.g., deck, patio, courtyard, entrance, window reveals) that
have a minimum depth of 3 feet;
g. Extensions (e.g., floor area, deck, patio, entrance) that have a minimum
depth of 2 feet and minimum length of 4 feet; and/or
Springfield
July 7, 2021
Page 3 of 11
h. Offsets or breaks in roof elevation of 2 feet or greater in height.
Comment: Our three-story buildings are 144' long. Although this is less the 160'
allowed for two-story buildings, it is 20% more than the 120' allowed for three story. We
understand that the Planning Director has the authority to approve variations to code
requirements of up to 20% of a requirement and, as before, are requesting continued
approval for this application. In addition, we believe this development offers
compensatory amenities together with existing conditions that each merit consideration,
and which further support this request:
1. The surrounding uses are predominantly commercial / institutional. (Credit
Union, Lumber Yard, School, Church)
2. Due to the distance from Main St., and orientation of the buildings, the
perceived building size is reduced.
3. This building is extremely efficient in meeting various building code
requirements while providing exceptional amenities at an affordable market
rate.
4. Four or five -story buildings could reduce the current building lengths to
comply with code while providing the necessary density, but would result in
more imposing structures that are less compatible with neighbors. Such
building massing would dwarf neighboring buildings and be out of character.
5. A 10' wide "ally type" void between buildings cut in half would be unsightly, as
well as consume useful open space, while reducing efficiency.
6. Our articulated roof forms and have greater slopes and overhangs than
required;
7. More than 15% of our facade is comprised of windows and doors
(approximately 23%);
8. Our buildings provide profuse articulation. We are required to provide two out
of the following three elements - We provide all three:
f. Recess decks (or patios, courtyard, entrance or window reveals)
that have a minimum of 3' depth.
g. Extension of decks (or patios, floor areas, entrance) that have a
minimum depth of 2' and a minimum width of 4'.
h. Offsets or breaks in roof elevation of 2' or greater in height.
9. We are proposing the use of siding patterns and coloring to further enhance
visual interest and identity of building portions.
3. Transition and Compatibility between Multi -unit and LDR Development. Multi -unit
developments adjacent to properties designated LDR shall comply with the transition
area and compatibility standards listed below, unless it can be demonstrated that
adjacent LDR property is committed to a non-residential use e.g., church) that is unlikely
Springfield
July 7, 2021
Page 4 of 11
to change (See Figures 3.2-0 and 3.2-P). In evaluating the status of an adjacent
property, the Metro Plan designation shall take precedent over the current zone or use.
Comment: We understand the Metro Plan designation takes precedence for the small
LDR property at the NE corner of our project.
4. Storage. Multi -unit development shall provide space for trash receptacles,
storage and equipment as specified in the following standards (See Figure 3.2-M):
a. Adequate, accessible and secure storage space shall be provided for
each dwelling. A minimum of 112 cubic feet of enclosed storage is required
separate from the living unit. Garages and storage units adjoining a dwelling
(e.g., attached to decks and patios) shall quality as storage space;
b. Trash receptacles shall be screened from view by placement of a solid
wood fence, masonry wall, or similar sight -obscuring, gated enclosure, from 5 to
6 feet in height, Obscuring landscaping shall be planted a minimum 24 inches in
height at planting around all exposed sides of the wall or fence, unless breaks
are provided for gates. See also, Section 4.4-110;
C. No trash receptacles shall be located in any front yard setback, or within
25 feet of property lines abutting LDR zoned or designated properties; and
d. Ground -mounted equipment, including exterior transformers, utility pads,
cable television and telephone boxes and similar utility services, shall be placed
underground, where practicable. When placed above ground, equipment shall be
placed to minimize visual impact; or screened with a wall or landscaping. When
walls are used they shall be tall enough to completely screen the equipment at
the time of the equipment installation. Landscaping shall be planted tall enough
to attain 50 percent coverage after 2 years and 100 percent coverage within 4
years.
Comment: Required storage, trash enclosure and ground mounted equipment shall be
provided as required. The office / storage building provides additional tenant storage
spaces beyond the individual requirement as well as provides space for maintenance
equipment.
S. Open Space. Multi -unit developments shall provide both Common Open Space
and Private Open Space as specified in the following standards (See Figure 3.2-Q):
a. General. Inclusive of required yards, a minimum of 15 percent of the
gross site area shall be designated and permanently reserved as open space.
Springfield
July 7, 2021
Page 5 of 11
The total required open space is the sum of setbacks, common open space, and
private open space. Inventoried natural features (including regulated wetlands)
and/or historic features onsite may be counted toward up to 50 percent of
common open space requirements. See Chapter 6 for definitions of open space,,
open space, common; and open space, private.
i. Multi -unit developments in mixed-use buildings are exempt from
these standards.
ii. Muld-unit developments at densities exceeding 30 units per
gross acre shall include a minimum of 10 percent of the gross site as
open space, which may be any combination of yards, common open
Spam and private open space.
iii. Multi -unit developments at densities less than 30 units per gross
acre shall provide open space as specified in the amounts specified
below.
b. Common Open Space shall be provided in all newly constructed multi-
unit development as specified in the following standards:
L A minimum of 0.25 square feet of common open space shall be
required for each square foot of gross residential floor area;
ii. Common open space areas provided to comply with this
standard shall be at least 500 square feet with no horizontal dimension
less than 15 feet;
iii. A maximum of 15 percent of the required common open space
can be on slopes greater than 25 percent; and
iv. Multi -unit developments shall designate within common open
Spam a minimum of 250 square feet of active recreation area (including,
but not limited to: children's play areas, play fields, swimming pools,
sports courts) for every 20 units or increment thereof. dor example, a 60
unit development shall provide a minimum area of 750 square feet for
active recreation. No horizontal dimension shall be less than 15 feet.
EXCEPTION. As determined by the Director, qualified senior housing
developments may be excluded from this requirement; however, all
other common open space requirements apply;
Springfield
July 7, 2021
Page 6 of 11
V. Placement of children's play areas shall not be allowed in any
required yard setback or transition area;
Vi. Landscaping and/or natural vegetation shall occupy a minimum
of 50 percent of required common open space. On-site natural resources
and historic features which are accessible to residents (including, but not
limited to: by trails, boardwalks) may be used to partially or fully satisfy
this requirements; and
vii. Indoor or covered recreational space (including, but not limited
to: swimming pools, sports courts, weight rooms) shall not exceed 30
percent of the required common open space area.
viii. Exemptions to the common open space standard may be
granted for multi -unit developments of up to 60 units (or for the first 60
units of a larger project) when the developments are within 1/4 mile
(measured walling distance) to a public park; and there is a direct,
improved, permanent, public, Americans with Disabilities Act (ADA) -
accessible, lighted, maintained pedestrian trail or sidewalk between the
site and the park An exemption shall be granted only when the nearby
park provides active recreation area, as defined by Subsection iv., above.
ix. Phasing shall not be used to circumvent common open space
standards.
X. Common Open Space does not include required yards or
transition areas unless authorized under Sections 3.2-245 or 3.2-250.
C. Private Open Space shall be provided in all newly constructed multi -unit
developments, to comply with the following standards:
L All private open space shall be directly accessible from the
dwelling unit through a doorway;
H. Dwelling units located at or below finished grade, or within 5
feet of finished grade, shall provide a minimum of 96 square feet of
private open space, with no dimension less than 6 feet; and
iii. Private Open Space provided may be deducted from the
required amount of Common Open Space. For example, a project with
37,500 square feet of gross floor area requires 9,375 square feet of
Common Open Space under Subsection b.l., above. If 2,400 square feet
Springfield
July 7, 2021
Page 7 of 11
of Private Open Space is provided, the minimum Common Open Space
requirement may be reduced to 6,975 square feet (9,375 — 2,300).
Comment: Private and Public open space shall be provided as required. Please see
drawing sheet Al for a tabulation of open space.
6. Landscaping, Fences and Walls. Mule -unit developments shall provide
landscaping as specified in Section 4.4-105 and the following standards (See Figure
3.2Q):
a. A minimum of 15 percent of the site shall be landscaped with a mix of
vegetative ground cover, shrubbery and trees. Trees, a minimum 2 inches (dbh)
in caliper, and shrubbery, a minimum of 24 inches in heigh4 shall be planted.
Bark mulch, rocks and similar non -plant material may be used to compliment the
cover requirement, but shall not be considered a sole substitute for the
vegetative ground cover requirement;
b. Street trees, a minimum 2 inches (dbh) caliper, shall be placed within
the planter strips between the curb and the sidewalk Street trees shall be
planted 1 per every 30 linear feet (minimum) of stmt frontage, as specified in
Section 4.2-140;
C. Feng in front yards and along any frontage used to comply with the
building orientation standard shall be limited to 3 feet in height. Fences in other
yards shall comply with the fence standards specified in Section 4.4-115, and the
vision clearance standards specified in Section 4.2-130; and
d. The use of native and/or drought -tolerant landscaping is encouraged. All
landscaping shall be irrigated with a permanent irrigation system unless a
licensed landscape architect submits written verification that the proposed plant
materials do not require irrigation. The property owner shall maintain all
landscaping.
Comment: Landscaping, fences and irrigation shall be provided as required. We are
proposing a 6' tall fence as apparently required for internal lot lines. However, we would
like the option of a 3' tall fence on the property line that borders the neighboring
property to the south.
7. Pedestrian Cirmlation. Multi -unit developments with more than 20 units shall
provide pedestrian drmlation as specified in the following standards (See Figure 3.2-R):
Springfield
July 7, 2021
Page 8 of 11
a. Continuous internal sidewalks shall be provided throughout the site.
Discontinuous internal sidewalks shall be permitted only where stubbed to a
future internal sidewalk on abutting properties, future phases on the subject
property, or abutting recreation areas and pedestrian trails;
b. Internal sidewalks shall be separated a minimum of 5 feet from
dwellings, measured from the sidewalk edge closest to any dwelling unit;
C. The internal sidewalk system shall connect all abutting streets to primary
building entrances;
d. The internal sidewalk system shall connect all buildings on the site and
shall connect the dwelling units to the parking areas, bicycle parking, storage
areas, all recreational facilities and common areas, and abutting public sidewalks
and pedestrian trails;
e. Surface treatment of internal sidewalks shall be concrete, asphalt or
masonry pavers, at least 5 feet wide. Multi -use acoessways (e.g., for bicycles,
pedestrians and emergency vehicles) shall be of the sane materials, at least 10
feet wide. Where emergency vehicle access is required, there shall be an
additional 5 feet on either side of the accessway. The additional 5 foot area may
be turf -block, grass rete or similar permeable material on a base of gravel
capable of supporting fire equipment weighing 80,000 pounds.
f. Where internal sidewalks cross a vehicular circulation area or parking
aisle, they shall be dearty marked with contrasting paving materials, elevation
changes, speed humps, or striping. Speed humps shall be subject to review and
approval by the Fire Marshal. Internal sidewalk design shall comply with
Americans with Disabilities (ADA) requirements;
g. Where the internal sidewalks are parallel and abutting to a vehicular
circulation area, the sidewalk shall be raised or be separated from the vehicular
circulation area by a raised curb, bollards, landscaping or other physical barrier.
If a raised sidewalk is used, the ends of the raised portions shall be equipped
with curb ramps; and
In. All on-site internal sidewalks shall be lighted to a minimum of 2 foot-
candles.
Comment: Pedestrian circulation shall be provided as required. Please note that a
detailed survey determined that our 40'-0" wide access "flagpole" currently serves as
the driveway entrance to the neighboring bank property. In addition, the bank's parking
Springfield
July 7, 2021
Page 9 of 11
islands intrude into that 40'-0" width. Our plan proposes accommodating the existing
improvements to the extent possible, which necessitates removing an existing row of
trees along the flagpole's east property line in order to install a minimum width (3'-4"
wide) sidewalk. This sidewalk is less than the 5-0" width specified in the zoning code,
but provides the required T-0" width required for accessibility, including up to 200 lineal
feet between required passing areas.
S. Parking. Multi -unit developments shall provide parking design as specified in the
following standards:
a. Parking lots shall be placed to the side or rear of buildings as specified in
the Building Orientation Standards. Parking shall not be placed along that portion
of the street where building frontages are used to comply with the building
orientation standard;
b. Lighting shall be provided for safety purposes, and focused/shielded to
avoid glare on adjacent properties or dwellings as specified in Section 4.5-100;
C. There shall be 1 planter island for every 8 parking spaces. Planter islands
shall be a minimum of 6 feet wide, exclusive of the curb, the full length of a
parking space containing 1 shade tree (a minimum 2 inches (dbh) in caliper at
planting) and vegetative ground cover. Trees shall be specimens capable of
attaining 35 feet or more in height at maturity and shall not produce excessive
fruit, nuts, or sap (i.e., die to pest damage). Bark mulch is not an a¢eptable
substitute for vegetative ground cover in the planter island. Water quality
features may be incorporated into planter islands. landscape areas shall be
evenly distributed throughout the perimeter of interior parking areas, where
practicable. See Section 4.4-105F. for recommended shade trees;
d. A minimum 6 -foot wide planter area shall separate and visually screen
parking from living area windows. The planter area shall include a mix of ground
cover, shrubbery, and trees with appropriate growth habit (i.e., for narrow
planters and any height limitations induding balconies, overhangs, and eaves).
Shrubbery in this planter area shall be at least 24 inches in height at the time of
planting, and trees a minimum of 2 inches (dbh) in caliper at the time of
planting. See Section 4.4-110;
e. Parking lots shall be connected to all building entrances by means of
internal sidewalks;
f. All parking stalls fronting a sidewalk, or landscaped area shall be
provided with a secure wheel bumper not less than 6 inches in height and set
Springfield
July 7, 2021
Page 10 of 11
back from the front a minimum of 2 feet to allow for vehicle encroachment.
Wheel bumpers, if used, shall be a minimum of 6 feet in length. As an option ,
the sidewalk or planter may be widened 2 feet beyond the minimum dimension
required to allow for vehicle encroachment. The sidewalks and planters shall be
protected by a curb not less than 6 inches in height See also, Section 4.6-120C;
g. On corner lois/parcels, parking areas shall not be looted within 30 feet
of an intersection, as measured from the center of the curb return to the edge of
the parking area (curb or wheel stop);
h. All parking, maneuvering and loading areas abutting a property line or
right-of-way shall provide perimeter lot/parcel landscaping. A minimum 5 -foot
wide planting strip shall be planted with shade trees, a minimum 2 inches (dbh)
in caliper, and a low level (e.g., 30 to 40 inches) evergreen hedge. See also
Section 4.4-105;
i. Decorative walls may be used in place of the hedge in Subsection h.,
above, and shall be placed no closer than 4 feet from the property line. The
decorative wall shall be a minimum of 30 inches in height and no more than 40
inches in height, and shall comply with the vision clearance standards specified
in Section 4.2-130. Decorative walls shall be constructed of textured concrete
masonry (CMU) or similar quality material, and include a cap. The wall may be
partially see-through (up to 40 percent) as appropriate for security purposes.
The area between the wall and property line shall be landscaped with shade
trees;
j. Parking area landscaping shall be designed to reduce storm water runoff
(e.g., through infiltration swales and other measures), as practicable; and
k. Bicycle parking shall be provided as specified in Section 4.6-140-155 and
may be incorporated into the landscaping design.
Comment: Parking shall be provided as required. We are attempting to provide 50%
more parking than is required by the development code. One part of this plan is to
provide profuse landscaping in larger, but fewer areas. However, we are counting 10
islands immediately adjacent to parking areas for the 80 stalls shown. In addition, we
understand that 70% of the 54 required parking shall consist of "standard" stalls
measuring 9'x 18'. Therefore, we have proposed 38 stalls (70%) that meet this
requirement, plus 6 additional standard stalls. Additional stalls beyond those 44 are
anticipated to comply with the City's compact size requirement of 8'x 16'.
Springfield
July 7, 2021
Page 11 of 11
9. Vehicular Circulation. Multi -unit developments shall provide vehicular circulation
as specified in the following standards (See Figure 3.2-R):
a. The onsite driveway (or private street) system shall connect with public
streets abutting the site;
b. Shared driveways shall be provided whenever practicable to minimize
cross turning movements on adjacent streets. On-site driveways and private
streets shall be stubbed to abutting MDR/HDR properties, at locations
determined during Site Plan Review process to facilitate development of shared
driveways; and
C. Parking areas shall be accessed from alleys when properties abut an
alley, or an alley can reasonably be extended to serve the development.
Comment: Our vehicle circulation shall be provided as required. The intent of the
circulation design is to provide accommodation for delivery / trash collection /
emergency vehicles that would not require backing up.
Sincerely,
Ken Paulsen
Architect for Ridgeview Gardens
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PUBLIC WORKS DP_PARTMENT 1 Engineering Dixision Phone:: (141) 726-3753 Fax: (641) 736-1021
STORMWATER MANAGEMENT SYSTEM SCOPE OF WORK
-- (Ared help., ibis lineddledout kr Applicmrt) ----
(Plenee setura !a 31dtt.Stu+rdar @.Cit), ofSpru+gj+eld PubRe 1Von§s E'igineering; Fax # 736-1021, Pharr, #'36-1035.)
Project Name: Ridgaview Gardens Apadmente Applicant: A&O Engineering LLC
Assessors Parcel M 17-02-3332-3800 _ Date: 8/11/2020
Land Ilse (s): Multi -Family Residential _Phone#: (541)302-9790 _
Project Siu(Acres): 1.98 acres Fax #:
Approx. Impervious Area: 1.6acres Email: kylemords@ao-engr.com
Project Description (include a copy of Assessor's map):
The proposed project is to construct an apartment complex (approximately 54 units) with private infrastructure such as drives,
parking and ugOties.
Drainage Proposal (Public connection(s), discharge location(s), etc. Attach additional sheets) ifnecessary:
It is proposed to construct vegetafive stormwater treatment facilities (rain gardens, swales or storm planters) to treat and
convey slormwater runoff ham the impervious pavement surfaces. Proposed discharge locations are infiltration (if site soils
allow) and?or public storm main on the north side of Main Street
Proposed Stormwater Best Management Practices:
A vegetated facility (semle. rain garden or planter) is proposed to treat stormwater runoff from the impervious pavement.
Infiltration wll be ufilized from this firdi ty if possible.
-- (A (Area below this Pine liRrd out It the Clh• mut Returned 0 140 A aptionniq ---
(Ata it, matters, rill bass, checked by the City o theJtairi and back ofthis sheet shall be submitted
furan appTieaHmt tube compinmfor.vvhmatdf, aTlhuhgh amici refjriirernenrt map he aecas,at)�J
Drainaee Study Tvne (EDSPM Section 4.03.2): (Note, UH may be substituted for Rational Method).
❑ Small Site Study- (use Rational Method Por alndatems)
Mid -Level Development Study- (use Unit Hydrogmph Method for calculations)
Full Drainage Development Study --(tete Unit Hydrogaph Mcihod for calculations)
Environmental Considerations -
[2 [t+ Wellhead Zone: 'I$�,fi.$ "� v evil El Hillside Development: M1,4
❑ Wetland;Riparpian: Nl— ❑ Floodway/Floodplaim NIA
E9 Soil Type: lard ❑ Other Jurisdictions: A
Downstream A'h?'Jis aY/ ei 0r6A la" d
® NIA - tits Jcusi, 4resurl cadhrnaFayl cw;sm - 54wm m ,Na M {-irsv i�:54 t+✓ ally v eo;%A ha
❑ Flow line for starting water surface elevation:
❑ Design F1GL to use for starting water surface elevation:
❑ Manhole/Junction to take analysis to:
Return to Matt Stouder fa City of ti rin�fietd, email: mstouder(dei.s irinaticid.oras FAX: (i4l)736-1021 f
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COMPLETE STUDY ITEMS rar��e�i
* Bared upon the informanmr provided on thtihunt el tlrsshspt, the (rummy rrprns..o n rnlninnme efo hui IS needed lura..
applirabou to he coerpten for see mi¢al nigh req+eel [o dr..inog,. hon'ereq do, lLslehould oar be used in lieu afthe.springfdd
Drvelrpmmrl Code 61)(7jor the Chovis Engineering Design :dfmmta/. Cnatytiauz with rJrase requlrrmemv does nor coustlhtre-vire
npp,,.1.4ddnfanalsite gw,rrjk brfonnoor... nu or he rwe"hr+L rVou, Uponscupwgsheel.cul.ninaL, maitre cmrspleted in+nt hap
been Signed in to, space provided beioa':
Interim Design StaudardsiWat r Quality (EDSPM Chapter 3)
beyW NM
® ❑ All mirrinilding rooftop(IFFIR) impervirausurfaccs shall be pre-treated(e,g. multi-chambered catchbasin w oil
fi3tratinn mcdin) for starrrnvater quality. Additionally, a mininmm of 50%of the NBR impervious surface Miall be
1tq��r treated by venerated methods.
yJ ❑ Where required. vegetative stormwater design shall be consistent with interim design standards (EDSPM Section I Q,
set forth by the Durenu of Environmental Services RES) or Clean Water Services ICWS).
❑ For new NBR impervious area less than 15,000 square feet, a simplified design approach may be fniloavd as specified
by the AES for vegetative tmaunent.
`[� ❑ Ifs sformwatertraatment Swale is proposed, submit calculationslspeeifieatfons fm siring, velocity, flmv, side slopes,
bouom slope, and seed mix consistent with either BES or CWS requirements.
® ❑ Water Quality calculations as required in Section 3.03.1 ofthe EDSPM
[� ❑ .All building nwtlop mounted equipment, or other fluid containing equipment located outside ofthe building- shill
be provided with secondary containment or weather resboml enclosure.
General Study Requirements (EDSPM Section 4.03)
M ❑ Drainage study prepared by a professional Civil Engineerticenscd in tire state of Oregon.
® ❑ A complete drainage study, as required in EDSPM Section 4.03, 1, including a Itvdmlogical study map,
❑ Calculdinns showing system capacity far a 3 -year smmr event and ocerAow effects ofa 2s -year storm event.
® ❑ 7qo time afcenaeutration (Tc) sball be dwernsined using a 10 minute wart time for des -eloped basins.
Review of Downstream System (EDSPM Section 4.03.4.C)
❑ A downstream drainage analysis as described in EDSPM Section 4.03.4,C. On -she drainage shall be governed by the
Oregon Plumbing Specialty Code (OPSC).
❑ ® Elevations ofihe FILL and flex'lines for built city and private syetcroswhere applicable.
Design of Storm Systems (EDSPA( Section 4.04)
0 ❑ Flow lines, Stopes, rim elevations, pipe type and sizes clearly indicated on the plan set.
® El Minhuum pipe cover shell be 18 inches for reinforced pipe and 30 inches for plant concrete and plastic pipe mule rots.
or proper engOrcering calcgiatimrs shalt be provided when less. The eoverslraA be sufficient to support an 60,ODb in
toad withnur failure of the pipe structure.
❑ k(anning's "n" values for pipes shalt be cumistenr whit Table 4-1 ofthe EDSP. All stomi pipes shalt be desipred to
achicec a minimum velocity ofthr" (3) feet per second at 0.5 pipe full based on fable 4-1 as well.
Otber/Mise
4 ❑Existing and proposed cwnours, hxated alone fax immtvai. Include spot Oevations and site grades showing how site
drains
191 ❑ Private steamxsner casements shall be clearly depicted on plans when priwte stormwater nos» from one properly to
�
1[ another
K1 ❑ DryWells shall not receive mnriY firm any surface x90 being treated by one or more Willis, with the e:caputtl of
residential bundine roofs 1$DSI+Section 3 03.4.A) Addiumid provisions apply to Otis n, requiredbv the DEQ. Refer
mthawebsite' eu'w de ,uneoruse r%ermrtdwa ulchom,hem for more iofunrutdon.
N ❑ Detention ponds shall be designed to limit mngif to pre -development rates For the 2 through 25 -yen storm events
*Tkis form shall be inekrded ors on anackmear, invde rhe fmnteawer, alike vwmrwate YtnQP
* htlPlYR7AN't: ExGC'S'"EIiR YLhAS$ AE.iDttBbAD' Ar♦D57GR'.
As the creineer o f reeond. i hereby cemfy the above required trent, are complete and included with the suhmhicd stormwater Mud, and
planscl. i,
i
Signature: l�v � Llako: ///I/ 2a 1m
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