HomeMy WebLinkAbout[08] Engineering comments Judy Weyrens
From: Randy Sabart <rsabart@sehinc.com>
Sent: Thursday, August 09, 2012 3:12 PM
To: Judy Weyrens
Cc: Terry Thene
Subject: Ehlert (Notch Property) Development preliminary concept comments
Notch property development considerations:
1) Consideration should be given to dedicating a minimum of 66 feet for public right of way for the street with a
minimum of 10 to 15 feet of parallel drainage and utility easement on each side of the proposed street.
Since public utilities are not proposed at this time, consideration should also be given to dedicating additional utility
easement width to accommodate future utility construction. Typically 20 feet of easement width is reserved for utilities
0 -10 feet deep, 30 feet of easement for utilities 10 -15 feet deep, and 40 feet of easement for utilities 15 -20 feet deep.
Consider dedicating a minimum of a 60 foot right of way radius for the cul -de -sac.
2) Consideration should given to design the roadway's horizontal and vertical curves for a minimum of 30 MPH design
speed.
3) The development of large, rural lots in an area that could conceivably become part of the City's municipal utility
expansion area typically creates expensive scenarios for future municipal utility extensions.
Consideration should be given to ghost platting the subdivision such that the homesites, wells, and septic systems are
constrained to one side of the lot to allow future lot splits compliant with City zoning /subdivision requirements and to
improve the potential for more cost - effective future utility extension.
4) Given the proposed length of the cul -de -sac street exceeds present City requirements (500 feet maximum), consider
dedicating right of way south of the cul -de -sac to the south property line for potential future connection with the North
Corridor and reconfigure the southern three Tots accordingly. If a connection is ultimately determined not to be
necessary, the dedicated right of way could be vacated to the adjacent parcels.
5) It's conceivable that some east -west street connectively would develop between 320th Street and the future North
Corridor. Evaluate the potential for future east /west street alignments and dedicate the road rights of way between the
west and east plat lines.
6) Given the present intersection spacing of the existing township roads north of 320th Street (93rd Avenue, November
Drive), the proposed new intersection point should be reviewed to determine if the it would be more suitable to
connect at 93rd Avenue or November Drive and maintain greater intersection spacing along 320th Street. APO
intersection spacing guidelines for township roads suggest a minimum of 600 feet between full- movement intersections.
7) The County's GIS data suggests the presence of wetlands and hydric soils across the applicant's property. While it's
understood the drawing is only a concept plan at this stage, evaluation of the site for the presence of wetlands would be
advisable before a commitment is made on the preferred street geometrics.
Sincerely,
Randy Sabart, PE 1 Principal, Project Manager SEH Inc. 1 1200 25th Avenue South 1 St. Cloud, MN 56302 -1717
320.229.4348 direct 1 320.250.9187 cell 1 888.908.8166 fax www.sehinc.com SEH — Building a Better World for All of Us
STJOE, D12, D2
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