HomeMy WebLinkAboutComments PWE 11/30/2006
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MEMORANDUM
City of Sorin2:field
DATE:
November 30th, 2006
TO:
Linda Pauly, Urban Planner
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FROM:
Matt Stouder, EIT
SUBJECT: ZON2006-00057, Jackson, 277819th St
Public Works Engineering Comments
The subject Development Issues Meeting (DIM) involves tax lot 2000, located at 2778 19th St.
The applicant has submitted plans to discuss annexing 17.58 acres into the City of Springfield for
future development of a 3l-lot SFR subdivision.
The attached map below shows the existing street rights-of-way, public sanitary and stormwater
systems, and 2-foot contour lines. Responses to the applicant's questions pertinent to Public
Works, and discussion of additional issues, will be referenced in this document.
ADDlicant's Ouestions:
1, Will the City establish the UGH for this property? The owner's preference for the
line is to be about 100' north of the north line of Hayden Bridge Road extension.
The property owner to the east has installed rill about 150' north of Hayden Bridge
Road on his property. Will an annexation agreement be required? The City
generally does not establish the UGB for private properties. This would be the
responsibility of a private licensed surveyor hired by the applicant. An annexation
agreement will be required due to issues surrounding secondary access, storm drainage,
and sanitary sewer installation, among others.
2. The north cub-de-sac is proposed as a private street. The applicant/owner desires to
build a house on one of the lots in the north cul-de-sac and wants the security of a
gated neighborhood. Refer to Planning and Transportation Comments.
3. What would be the required improvements of 19th Street? Are there any other
offsite improvements? The required improvements along 19th Street will be a minimum
2/3 street improvement. Other offsite improvements would include improvement of a
secondary access to the property via either 19th Street or Hayden Bridge Road. This issue
will be discussed in detail in the annexation agreement.
4. Storm drainage - Applicant proposed constructing a swaleldetention pond
immediately north of the development outside the UGB. All stormwater would be
directed to this facility. Does the City agree with this concept? If not, what would
you propose? The City would not be amenable to construction of a swaleldetention pond
outside the UGB. There is an existing 18 inch pipe stub located on the western property
line north of Vera Street that should be utilized to drain this subdivision. The applicant
would be required to treat their stormwater runoff with measures consistent with current
City policies and procedures, and keep the post-developed runoff rate to pre-developed
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levels. Specific items related to connection of the stormwater system may be subject to
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the annexation agreement. I
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5, Does the City see any problems with the current lot configuration or street layout?
Wouldth,e City support a plan with a~proximately 100 dwelling units on about 10
. acre~ within the UGB CG-7 acres of o~pen space on the remaining portion of the
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parcel? See Planmng Department Comments.
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Additional Issues I
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. The property is located within a 10 - 201 year time of travel zone to a Springfield Utility
Board (SUB) well field.
. A large portion of the property is locatecl within the flood plain Zone A - areas impacted
by the lOO-year event, and some is locafed within Zone X - subject to less than 1 foot of
flooding in a lOO-year event. This will fIeed to be taken into account during subdivision
design.
. As indicated in the Soils Survey of Lane County, the soil type located on site is 75. This
soil type has a clay content on the order ( f ~ 20 - 45% (depending on depth), and a
permeability rate on the order of 0.6 - 2.$ inches/hour (at a depth of greater than 6 feet).
The depth to groundwater is greater thanl6 feet. Note this information isfrom the Soils
Survey of Lane County and does not necessarily reflect the actual soil conditlOns on-szte.
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Note: Contours shown on the above photo are at 2-foot intervals. Photo is not to scale.
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