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HomeMy WebLinkAboutPacket, DRC PLANNER 8/25/2021AGENDA DEVELOPMENT REVIEW COMMITTEE DEVELOPMENT SERVICES DEPARTMENT 225 FIFTH STREET Conference Room 616/ MS Teams Staff Review •• Tuesday, September 21, 2021 8••30-9; OO a•m• 1. Site Plan Review 811-21-000226-TYP2 811-21-000012-PROJ Bruce Wiechert Custom Homes Assessor's Map: 18-02-05-23 TL: 204 Address: Horace Street Existing Use: Vacant Applicant submitted plans for a 20 -unit residential development Planner: Melissa Carifio Meeting: Tuesday, September 21, 2021 8:15-9:00 virtual meeting via Microsoft Teams The Complete DRC Packet for this meeting is available online for you to review or print out from the laserfiche website: httD://www.sprinafield-or.gov/weblink8/browse.aspx VICINITY MAP 811-21-000226-TYP2 Site Plan Review 18-02-05-23 TL 204 Horace Street Bruce Wiechert Custom Homes City of Springfield Development & Public Works 225 Fifth Street Springfield, OR 97477 Site Plan Review SPRINGFIELD W 6 Application Type (Applicant. check Site Plan Review Pre -Submittal: ,_I Major Site Plan Modification Pre -Submittal, ❑ Site Plan Review Submittal: Ma'or Site Plan Modification Submittal: ❑ Required Project Information (Applicant. complete this section) Applicant Name: Bruce Wiechert Phone: 541-686-9458 Company: Bruce Wechert Custom Homes, Inc. Email:""ed'enh=es(gcancadmd Address: 3073 Skyview Ln., Eugene, OR 97405 Applicant's Re .:Anthony J. Favreau Phone: 541-683-7048 Com an :The Favreau Group, LLC Email: favreaugroup@msn.com Address: 3750 Norwich Ave., Eugene, OR 97408 Property Owner: Same as applicant Phone: Company: Email: Address: ASSESSOR'S MAP NO: 18-20-05-23 TAX LOT NO(S): 00204 Property Address: 049 Acres Size of Property: 32 ❑ Square Feet Proposed of nit20 Proposed Name of Project: Horace Apartment Description of If you are filling in this form by hand, please attach your proposal description to this application. Proposal: 20 Unit Apartment complex Existing Use:vacant New Impervious Surface Coverage (Including Bldg. Gross Floor Area): 18,204 sf Si natures: Please sign and Drint Mour name and date in the acicirociriate Required Project Information (City Intake Staff., Associated Applications: box on the next a e. complete this section) Signs: Pre -Sub Case No.: Date: Reviewed by: Case No.; Date:08/24/2021 Reviewed by: MC 811-21-000226-TYP2 Application Fee: $5745.70 Technical Fee: $ =1 Posta a Fee: $=1 TOTAL FEES: $ 16225.99 11111 PROJECT NUMBER: 811 -21 -000216 -PROD Revised 1/7/14 Id 101`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. Date: Signature 1 represent [his application to be complete for submiRal to the City. Consistent with the completeness check performed on this application at the Pre-SubmlBal Meeting, 1 affirm the Information identified by the City as necessary for processing the application Is provided herein or the Information will not be prowCedd 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 227.178 pertaining to a complNe appllu Owner: Date: 0 2 Signature Rlwaed 10.14.11 Rl 2&6 July 27, 2021 Assessor's Map: 18-20-05-23 Tax Lot 0204 NARRATIVE Applicants: Bruce Wiechert Custom Homes, Inc. 3073 Skyview Lane Eugene, OR 97405 (541)686-9458 Applicant's Representative: The Favreau Group 3750 Norwich Ave. Eugene, OR 97408 541-683-7048 Attn: Tony Favreau LAND USE REQUEST The applicant is seeking approval of the construction of an twenty unit apartment building, 21 vehicle parking spaces and 20 bicycle parking spaces on the subject site. SITE AND SURROUNDING CHARACTERISTICS The subject site is currently is vacant. The surrounding properties are zoned medium density on all sides. An existing 8" wastewater pipe will be extended along Horace St. and stubbed to the site. The site naturally drains to the north. The site will have a detention pond to limit flows to pre -development flows and overflow into the existing storm drain in Horace St. There is an existing water main on the north side of Horace St. and will be stubbed to the site. Telephone, gas and cable are also adjacent to the site. SITE PLAN APPROVAL The applicant is seeking an approval of an eight unit apartment building of approximately 3,500 square foot footprint on two stories and a 12 unit apartment building of approximately 4,560 square foot footprint on two stories. Each unit will have a minimum of one off street parking space and one bicycle storage space. The site will be landscaped. The proposed development is compatible with the surrounding developments. The nearest transit facility is located on Main St. just east of 42nd St. 3.2-240 Multi -unit Design Standards A. Applicability. In all residential districts, multi -unit development (3 or more attached units) shall comply with the design standards of this Section. In cases where the standards of this Subsection conflict with other standards in this Code, the standards of this Section shall prevail. B. Purpose. The purpose of this Section is to: 1. Promote the livability, neighborhood compatibility and public safety of multi -unit housing in the community; and 2. Promote higher residential densities inside the urban growth boundary that will utilize existing infrastructure and improve the efficiency of public services and facilities. C. Review. All multi -unit developments shall be reviewed as a Type II Site Plan Review application as specified in Section 5.17-100. The Director may also determine that a multi -unit development is subject to a Type III review when it is in the public interest. In addition, the applicant may choose the Type III Alternative Design procedure specified in Section 3.2-245 when proposing an innovative design that may preclude compliance with some or all of the design standards in this Section. D. Design Standards. Al of the following design standards shall be met by all multi -unit developments: Building Orientation; Building Form; Storage; Transition and Compatibility Between Multi -unit and LDR Development; Open Space; Landscaping; Pedestrian Circulation; Parking; and Vehicular Circulation. 1. Building Orientation. Multi -unit developments, when abutting a private, local, collector, or 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; RESPONSE: The lower units fronting Horace Street will have their doors face Horace Street. b. The front of the buildings shall be within 25 feet of the front lot/parcel line, RESPONSE: The building is setback from the Horace Street right-ot-way ten feet. EXCEPTION: Open, courtyard 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; RESPONSE: The parking is on the side of the buildings. 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. RESPONSE: Does not apply. 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). RESPONSE: The eight unit building is 80'x 44', and the 12 unit building is 120' x 44'. 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 forrts (minimum pitch 3 to 12) with at least a 6 -inch overhang; RESPONSE: The roof pitch is over 3:12. C. A minimum of 15 percent of the front fagade (area measurement) shall contain windows or doors. All windows and doors shall provide 4 -inch trim or be recessed (i.e., into the front fagade) to provide shadowing. RESPONSE: See Architect's Plans. d. Garages attached to living units and accessed from the street (front setback) shall be recessed at least 4 feet behind the front facade of a dwelling structure; and RESPONSE: Does not apply. a. 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 Aoorshall contain a minimum of 2 of the following features: RESPONSE: See Architect's plans. E Recesses (e.g., deck, patio, courtyard, entrance, window reveals) that have a minimum depth of 3 feet; RESPONSE: See site plan. 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 h. Offsets or breaks in roof elevation of 2 feet or greater in height. RESPONSE: See architect's plan. 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 us unlikely 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. a. When a single-family residence is within 75 feet of the subject multi -unit development site and the residence is on the same side of the street and same block, a setback similar to that of the nearest single-family residence shall be used for the front yard. "Similar` means the multifamily development setback is within 5 feet of the setback provided by the nearest single-family residence. For example, of the single-family residence setback is 20 feet, then the multi -unit building shall be set back by 15 to 25 feet. The minimum front yard setback shall be 10 feet, as specified in Section 3.2-215; and RESPONSE: All setbacks are 10'. b. A 25 -foot buffer area shall be provided between multi -unit development and property lines abutting an LDR property line, not including those property lines abutting rightof-ways. Within the 25 -foot buffer area, the following standards apply: RESPONSE: Does not apply. i. No vehicular circulation (i.e., driveways, drive lanes, maneuvering areas, and private streets) is allowed within the buffer, unless driveway placement within a buffer is required in order to comply with City, County or ODOT access management standards; ii. Site obscuring landscaping shall be required. The City may require retention of existing vegetation; installation of a 6 -foot minimum height, site -obscuring fence with shade trees planted a maximum of 30 feet on center (2 -inch caliper at planting); and/or other landscaping to provide visual buffering. In addition, the City may require acoustical barriers when parking is proposed within the transition area; iii. Building encroachments are allowed, provided no building may encroach more than 10 feet into the 25 foot buffer and no primary entrance shall face the abutting LDR property. Buildings shall not exceed 1 story or 21 feet within the buffer, and shall comply with all other applicable setbacks and transition areas specified elsewhere in this Code; iv. No active recreation areas (including, but not limited to: tot lots, swimming pools) are allowed within the 25 -foot buffer (garden spaces shall not be considered active recreation areas); V. Light standards shall be 12 feet or las in height and shielded so that light does not allow direct illumination onto adjacent LDR property or into dwelling units; Vi. Mechanical equipment shall be screened from view (i.e., as viewed from adjacent properties and street), and shall be buffered so that noise does not typically exceed 45 to 50 decibels as measured at the LDR property line. The City may require a noise study certified by a licensed acoustical engineer; and Vii. Al rooftop equipment shall be hidden behind parapets or other structures designed into the building. C. Buildings, or portions of buildings abutting an LDR property line or designation (i.e., side or rear lot/parcel line) outside of the 25 -foot buffer described above, shall not exceed a building height greater than 1 foot for each foot distance from the LDR property line. For example, a building or portion of a building 30 feet in height shall be 30 feet from the LDR property line. This standard applies up to a distance or 50 feet from the LDR property line. See also, Sections 3.2-215 and 4.4- 110. RESPONSE: Does not apply. d. Structures within 50 feet of an LDR zone shall not have a continuous horizontal distance exceeding 120 feet (measured from end wall to end wall). 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 qualify as storage space; RESPONSE: See architect's plan. b. Trash receptacles shall be screened from view by placement of a solid wood fence, masonry wall, or similar sightobscuring, 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; RESPONSE: Trash enclosure is shown on the Site plan. 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 RESPONSE: Trash enclosure is shown on the site plan. 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. 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 a open space. 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 on-site 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. RESPONSE: The total site area is 32,049 s.f. and the open space area is 13,845 s.f. which is 43%. I. Multi -unit developments in mixed-use buildings are exempt from these standards. ii. Multi -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 space 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: I. 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 space 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. For 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; 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. Onsite 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 mulb-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 walking distance) to a public park; and there is a direct, improved, permanent, public, Americans with Disabilities Act (ADA)sccessible, 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; ii. 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 of Private Open Space is provided, the minimum Common Open Space requirement may be reduced to 6,975 square feet (9,375 — 2,300). 6. Landscaping, Fences and Walls. Multi -unit developments shall provide landscaping as specified in Section 4.4-105 and the following standards (See Figure 3.2Q): RESPONSE: See landscaping plan. 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 height, 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 street frontage, as specified in Section 4.2-140; C. Fences 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. 7. Pedestrian Circulation. Multi -unit developments with more than 20 units shall provide pedestrian circulation as specified in the following standards (See Figure 3.2-11): RESPONSE: Does not apply. 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 accessways (e.g., for bicycles, pedestrians and emergency vehicles) shall be of the same 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-crete or similar permeable material on a base of gravel capable of supporting fire equipment weighing 80,000 pounds. E Where internal sidewalks cross a vehicular circulation area or parking aisle, they shall be clearly 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; 8. 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 h. All on-site internal sidewalks shall be lighted to a minimum of 2 foot- candles. 8. 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 firontages are used to comply with the building orientation standard; RESPONSE: See site plan. 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; RESPONSE: See Architect's plan. 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 acceptable 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 in tenor parking areas, where practicable. See Section 4.4-105F. for recommended shade trees; RESPONSE: See landscape plan. 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 including 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; RESPONSE: See landscape plan. a. Parking lots shall be connected to all building entrances by means of internal sidewalks; RESPONSE: See site plan. E 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 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; RESPONSE: See site plan. g. On corner lots/parcels, parking areas shall not be located 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); RESPONSE: Does not apply. h. All parking, maneuvering and loading areas abutting a property line or night - 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; RESPONSE: See landscape plan. 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; RESPONSE: See landscape plan. j. Parking area landscaping shall be designed to reduce stone water runoff (e.g., through infiltration swales and other measures), as practicable; and RESPONSE: See landscape plan. 10 k. Bicycle parking shall be provided as specified in Section 4.6-140-155 and may be incorporated into the landscaping design. RESPONSE: Sea site plan. 9. Vehicular Circulation. Multi -unit developments shall provide vehicular circulation as specified in the following standards (See Figure 3.2-11): a. The onsite driveway (or private street) system shall connect with public streets abutting the site; RESPONSE: See site plan. 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 RESPONSE: See site plan. C. Parking areas shall be accessed from alleys when properties abut an alley, or an alley can reasonably be extended to serve the development. RESPONSE: Does not apply. 11 a �=�6e'� 31" me � •� as� � ��N'y ! � � m 9g ya Y 055 3§�x xeSv m �3sla �p���"Aeg£p•4 ias x d "xm I 0000000 I I I �� � ! •G � 1° .�l� is � o c a5 ,• 5 el ,a I I • m m ®.. _ _® ®1 1 � eq • � 5 f !� _ _ I e I I g 1 TZE VNEANGRGNP SITE PIAN/GRADING PIAN m CNIL ENGINEENNO NGRAGE STREET � �I,Nm m-,,,, �.�•,-oma ..., e.. mow, Stormwater Surface FiltrationAnfiltration Facility Sizing Spreadsheet 24 Hour Storm, NRCS Type 1 A Rainfall Distribution City of Eugene Name: Horace St.2 Unit Apmtmr Address: Horace Impervious Area CN=l Sorinafield. OR [Zip Codel or: Anthony J. Fayreau TY: The Fmmeeu Group Date: 7/8/2021 Permit Number: Permit CatchmentlD: Entire Subdivision Complete this form for each drainage catchment in the project site that is to be sized per the Presumptive Approach. Provide a distinctive Catchment ID for each facility coordinated with the site basin map to correlate the appropriate calculations with the facility. The maximum drainage catchment to be modeled per the Presumptive Approach is 1 acre (43,560 SF) =or infiltration facilities in Class A or B soils where no infiltration testing has been per romed use an infiltration rate of 0.5 in/for. For all facilities use a maximum soil infiltration rate of 2.5 in/hr for lommi/growing medium. loses'Ym' from the dmpdown loxes below next to the design standards requirements for this facility. Pollution Reduction (PR)Yes Flow Control (FC)j Yes Destination(DT) No 'Animiio-ationkciiiry rnuA1vrhsenas memr1l1Vrvem rroOcivsonmion 2qui2rrow Total Square Footage Impervious Area= =5 sgfl Total Square Footage Pervious Area= 14209 sqN Impervious Area CN=l 98 Flow Control Pervious Area CN=l 85 Total Square Footage of Drainage Area= 31925 sfi Time of Concentration Post Development= min Weighted Average CN=l 92 Pre�Development CN= 85 Time of Concentration Pre�Development= 10 min Tested Soil Initiation Rate= 1 rotor (Soo role 4) Destination Design=®iNhr Design Soil Infiltration Rate=Iin/hr Soil Infiltration Rate R uirement Rainfall De h Desi nStorm Stoma P011otlonlVuIlon 1.4inches Water Flow Control 3.6 inches Flood Control Destination I 3.6 inches Flood Control Facility Max. Ponding Depth in Stormwater Facility= Depth of Growing Medium (So ]/2]/2021-3:24 PM Facility Surface Facility Surface Pern Facility Bottom Facility Bottom Pern Ratio of Facility Area to Basin Vc Pollution Reduction-Calculation Results Peak Flow Rate to Stormwater Facility = 0.136 cfs Pik Facility Overflow Rate= 0.000 cfs Total Runoff Volume to Stormwater Facility 193] cf Total Overflow Volume= 0 cf Max. Depth of Stormwater in Facility= 2.0 in Drawdown Time= 02 hours Yes Facility Sizing Meets Pollution Reduction Standards? VES Meets Requirementof No Facility Flooding? VES Meets Requirement for Maximum of 18 Hour Drawdown Time? Flow Control-Calculation Results Peak Flow Rate to Stormwater Facility = 0.579 cfs Peak Facility Overflow Rate= 0.358 cfs Total Runoff Volume to Stormwater Facility= 718 cf Total Overflow Volume= 3297 cf Peak Off -Site Flow Rate Max. Depth of Sierra in Facility= in Filtration Facility Underdrain= 0.034 cfs Drawdown Timms hours Pre-Development Runoff Data Peak Flow Rate = 0.362 cfs Total Runoff Volume =1 5597 cf =Facility Sizing Meets Flow Control Standards? VES Meets Requirement for Post Development offsite flow less or equal to Pre-Development Flow? VES Meets Requirement for Maximum of 18 Hour Drawdown Time? Destination-Calculation Results Peak Flow Rate to Stormwater Facility = N/A cfs Peak Facility Overflow Rate= N/A cfs Total Runoff Volume to Stormwater Facility= N/A cf Total Overflow Volume= N/A cf Max. Depth of Stormwater in Facility- N/A in Drawdown Time= N/A lours N/A Facility Sizing Meets Destination Standards? =Meets Requirement of No Facility Flooding? L.2LAJMftt, Requirement for Maximum of 30 hour Drawdown Time? 7/0/2021-3:24 PM HORACE STREET APARTMENTSDRAINAGE STUDY July 27, 2021 SITE CHARACTERISTICS The subject properly is identified on County Assessor's Maps as 18-20-05-23-0204. It is located on the south side of Horace Street, east of Filbert Sl. The site is an open field and consists of about 0.74 acres. EXISTING HYDROLOGY The site is relatively flat and portions of the site drain to the north. PROPOSED HYDROLOGY There is approximately 18,204 square feel of impervious area that will be directed towards a filtration planter on site. The required size of the filtration planter was determined by the City of Eugene Stormwaler Surface Filtration/Infiltration Facility Sizing Spreadsheet and was sized for flow control. The required filtration planter is 1,450 square feel, with 1,589 square feel provided. Attached are the calculations. CONCLUSION Based on my calculations and the proposed drainage system is sized properly and will provide the necessary flow control. 20182410 OFFS ES, �o� PE'f' r OREGON J ti11.199h (VQ- /Vy �. FPS EXPIRES DEC. 31. 2021 ji1j.d.�— Stormwater Surface FiltrationAnfiltration Facility Sizing Spreadsheet 24 Hour Storm, NRCS Type 1 A Rainfall Distribution City of Eugene Name: Horace St.2 Unit Apmtmr Address: Horace Impervious Area CN=l Sorinafield. OR [Zip Codel or: Anthony J. Fayreau TY: The Fmmeeu Group Date: 7/8/2021 Permit Number: Permit CatchmentlD: Entire Subdivision Complete this form for each drainage catchment in the project site that is to be sized per the Presumptive Approach. Provide a distinctive Catchment ID for each facility coordinated with the site basin map to correlate the appropriate calculations with the facility. The maximum drainage catchment to be modeled per the Presumptive Approach is 1 acre (43,560 SF) =or infiltration facilities in Class A or B soils where no infiltration testing has been per romed use an infiltration rate of 0.5 in/for. For all facilities use a maximum soil infiltration rate of 2.5 in/hr for lommi/growing medium. loses'Ym' from the dmpdown loxes below next to the design standards requirements for this facility. Pollution Reduction (PR)Yes Flow Control (FC)j Yes Destination(DT) No 'Animiio-ationkciiiry rnuA1vrhsenas memr1l1Vrvem rroOcivsonmion 2qui2rrow Total Square Footage Impervious Area= =5 sgfl Total Square Footage Pervious Area= 14209 sqN Impervious Area CN=l 98 Flow Control Pervious Area CN=l 85 Total Square Footage of Drainage Area= 31925 sfi Time of Concentration Post Development= min Weighted Average CN=l 92 Pre�Development CN= 85 Time of Concentration Pre�Development= 10 min Tested Soil Initiation Rate= 1 rotor (Soo role 4) Destination Design=®iNhr Design Soil Infiltration Rate=Iin/hr Soil Infiltration Rate R uirement Rainfall De h Desi nStorm Stoma P011otlonlVuIlon 1.4inches Water Flow Control 3.6 inches Flood Control Destination I 3.6 inches Flood Control Facility Max. Ponding Depth in Stormwater Facility= Depth of Growing Medium (So ]/2]/2021-3:24 PM Facility Surface Facility Surface Pern Facility Bottom Facility Bottom Pern Ratio of Facility Area to Basin Vc Pollution Reduction-Calculation Results Peak Flow Rate to Stormwater Facility = 0.136 cfs Pik Facility Overflow Rate= 0.000 cfs Total Runoff Volume to Stormwater Facility 193] cf Total Overflow Volume= 0 cf Max. Depth of Stormwater in Facility= 2.0 in Drawdown Time= 02 hours Yes Facility Sizing Meets Pollution Reduction Standards? VES Meets Requirementof No Facility Flooding? VES Meets Requirement for Maximum of 18 Hour Drawdown Time? Flow Control-Calculation Results Peak Flow Rate to Stormwater Facility = 0.579 cfs Peak Facility Overflow Rate= 0.358 cfs Total Runoff Volume to Stormwater Facility= 718 cf Total Overflow Volume= 3297 cf Peak Off -Site Flow Rate Max. Depth of Sierra in Facility= in Filtration Facility Underdrain= 0.034 cfs Drawdown Timms hours Pre-Development Runoff Data Peak Flow Rate = 0.362 cfs Total Runoff Volume =1 5597 cf =Facility Sizing Meets Flow Control Standards? VES Meets Requirement for Post Development offsite flow less or equal to Pre-Development Flow? VES Meets Requirement for Maximum of 18 Hour Drawdown Time? Destination-Calculation Results Peak Flow Rate to Stormwater Facility = N/A cfs Peak Facility Overflow Rate= N/A cfs Total Runoff Volume to Stormwater Facility= N/A cf Total Overflow Volume= N/A cf Max. Depth of Stormwater in Facility- N/A in Drawdown Time= N/A lours N/A Facility Sizing Meets Destination Standards? =Meets Requirement of No Facility Flooding? L.2LAJMftt, Requirement for Maximum of 30 hour Drawdown Time? 7/0/2021-3:24 PM