HomeMy WebLinkAboutMeeting Packet Planner 9/15/2023Completeness Check
Meeting
Development and Public Works Department
Conference Room 616 & Zoom
COMPLETENESS CHECK MEETING DATE:
Friday, September 22, 2023
10:00 a.m. - 11:00 a.m.
DPW Conference Room 616 and Zoom
Completeness Check Mtg (Partition Tentative) #811 -23 -000217 -PRE 811-23-000218-PROJ
Jacob Lancey
Assessor's Map: 17-02-32-43 TL: 6900
Address: 421 S. 47� Street
Existing Use: residential
Applicant has submitted plans for a 3 -lot residential partition
Planner: Tom Sievers
Meeting: Friday, September 22, 2023 10:00 — 11:00 via Zoom and Conference Rm 616
VICINITY MAP
811 -23 -000217 -PRE Completeness Check Meeting
17-02-32-43 TL 6900
421S.47 th Street
Jacob Lancey
City of Springfield
Development & Public Works
225 Fifth Street
Springfield, OR 97477
Land Division Tentative Plan
Partition, Subdivision
SPRINGFIELD
w 0#1
Application Type (Applicant: check ne
Partition Tentative Pre -Submittal: Subdivision Tentative Pre -Submittal: I❑
Partition Tentative Submittal: Subdivision Tentative Submittal:
Required Project Information (Applicant., complete this section)
Applicant Name: JacobLancey .6405
Company:
Fax:
Address: 421 S 47th St, Springfield, OR 97475
Applicant's Rep.: Drew Strout, FIT
Phone:541.746.0637, Ext 106
Company: Branch Engineering Inc
Fax:
Address: 310 5th St, Springfield, OR 97477
Property Owner: Trent & Laura Miller
Phone:
Company:
Fax:
Address: 421 S 47th St, Springfield, OR 97475
ASSESSOR'S MAP NO: 17-02-32-43
TAX LOT NOS : 6900
Property Address: 421 S 47th St Springfield, OR 97475
Size of Property: 0.5 Acres ❑X Square Feet ❑
Proposed Name of Subdivision:
Description of If you are filling in this form by hand, please attach your proposal description to this application.
Proposal: Divide one parcel into three separate parcels in the RI zone.
Existing Use: Single-Fanuily Single-FamilyResidential
Total acreage of parcels
# of Lots/Para 3
/ allowable dens' .50ac/6-14 du/ac
proposed x 3
Dvrell Units
Si natures: Please sign and print your name and date in the appropriate
Required Project Information (City Intake Staff.
Associated Applications:
box on the next paqe.j
complete this section)
Signs:
Pre -Sub Case No.:
Date:
Reviewed by:
Case No.:
Date:
Reviewed by:
Application Fee: $
Technical Fee: $
Posta a Fee: $
TOTAL FEES: $
PROJECT NUMBER:
Revised 1/7/14 kl 1 of 10
September 14, 2023 -Branch
ENGINEERING -
PROJECT NARRATIVE
LAURA AND TRENT MILLER
TENTATIVE PARTITION
Branch Engineering Inc. Project No. 23-134
This partition divides an underdeveloped property in the Low Density Residential
Zone. It is composed of a 0.5 -acre property (Tax Map 17-02-32-43 Tax Lot 6900). The
property abuts South 471h Street to the west.
The minimum density in Springfield is 6 units per acre per SDC 3.2-205(A)(1). The
net area of the site is 0.5 acres, which requires 3 units minimum. The application
proposes an internal division of property consisting of three parcels to fulfill the City of
Springfield density requirements.
Parcel 1 (11,882 SF) is a standard lot with frontage on S 471h St. Parcels 2 (3,864
SF) and 3 (6,144 SF) are standard lots that will be provided access to S 471h St via an
existing and proposed Private Access and Utility Easement and Maintenance Agreement.
Existing sanitary, storm, water and electric services are available in S 47� St. These
utilities will be extended to the site via the existing Private Access and Utility Easement.
With the type of soils that have been mapped by the NRCS. it is assumed that the
soils on site have a low infiltration rate. Due to this, all the runoff from any development
will outfall to the public stormwater pipe to the northwest of the development within S
471h St. No flow or flood control systems are proposed.
No public improvements are being proposed with this application.
EUGENE SPRINGFIELD
310 Sth Street, Spnngfield, OR 97477 1 p- 541.746.0637 1 v .brancheng ine nng.mm
TECHNICAL MEMORANDUM
DATE: September 14, 2023
PROJECT: S 47TH STREET PARTITION
Branch Proj #23-134
TO: City of Springfield
Atin: Clayton McEachern
FROM: Renee Clough, P.E., RLS., AICP
RE: Stormwater Design and Analysis
ranch
ENGINEERING=
This Memorandum was prepared to address the stormwater runoff from a proposed partition
located at 421 S. 47m Street in Springfield, Oregon.
The existing site is a 21,900 square foot under -developed lot with a gentle 1.596 downward slope
from south to north. The existing home is located near the front of the property along 471° Street
with a detached garage to the southeast of the home with a gravel pad located behind it. A shared
driveway is utilized by the site and the adjacent properties to the south. Two significant trees exist
on site, a 12" diameter deciduous located behind the home, and a 40" diameter evergreen near the
rear of the property. The remainder of the property is a maintained lawn and garden. According to
the Natural Resources Conservation Service (NRCS), the existing soils on site are Pengra-Urban Land
Complex, which encompasses approximately 1296 of the site, all near the southwest corner of the site
in the developed area, and Courtney Gravely Silty Clay Loam, which encompasses the remainder of
the site. Pengra-Urban Land Complex is classified as a poorly -drained stratified alluvium in
hydrologic soil group D, and Courtney Gravely Silty Clay Loam is classified as a poorly -drained
alluvium in hydrologic soil group D.
PROPOSED CONDITIONS
The proposed development consists of three parcels; the existing home will occupy the westerly
parcel while the other two parcels will be available for new residences. Each parcel will be permitted
up to 60% of their area as impervious surfaces (roofs, pathways, driveways, em.). The existing shared
driveway is within a 26 -foot easement with an 18 -foot -wide pavement section abutted by 5 -6 -feet of
compacted gravel. 10 -feet of the paved area is on site. The three parcels will take access from this
and an expansion of the easement towards the rear of the property.
WATER QUALITY
Per the city of Springfield's Smrmwater Quality Design Standards all new non -rooftop area exceeding
500 square feet must be treated before leaving the site. As no design for construction is proposed
with this application, no design for treatment can be determined. Per the City of Eugene Smrmwater
Management Manual, a majority of the vegetative treatment options require 0.03 to 0.06 of the
impervious area. Using Table 3.2.225 in the Springfield Development Code, the maximum area
EUGENE SPRINGFIELD SALEM-KEIZER
310 5th Street, Spnngfield, OR 97477 1 p- 541.746.0637 1 f 541.746.0389 1 w .branchengineenng.com
S 47th Street Partition (23-134)
September 14, 2023
needed for treatment would be between 1.8% and 3.696 of the total land area for Parcel 2 and be
between 1.496 and 2.896 of the total land area for Parcel 3. Considering at least 4096 of the
development must be left as impervious area, there is ample room for a number of treatment
systems to be constructed on site.
ANALYSIS
The runoff from existing home and garage are captured in rain barrels. No outfall device to the
public infrastructure exists on site.
PROPOSED STORMWATER ANALYSIS
Based on the Santa -Barbara Urban Hydrograph Method, the maximum increase in flow during a 2 -
year storm event from current conditions to the maximum impervious area for both undeveloped
parcels is 0.11 cubic feet per second (0.04 from Parcel 2 and 0.07 from Parcel 3).
With the type of soils that have been mapped by the NRCS, it is assumed that the soils on site have a
low infiltration rate. Due to this, all the runoff from any development will outfall to the public
stormwater pipe to the northwest of the development within S 47° Street No flow or flood control
systems are proposed.
Renee Clough, P.E., P.LS., AIEP
Project Manager
Document ID: 23-134 - STM Tech Memo.doc
Branch Engineenng, Inc.
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DIGITALLY SIGNED
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ExPms: DECEMBER 30, ?023