HomeMy WebLinkAbout2001-01-19 BRAA Grading & Drainage CommentsKris Danielson
From: Postler, Dennis M dpostler a@bonestroo.com]
Sent: Friday, January 19, 2001 11:36 AM
To: Scott Richards (E -mail)
Cc: Iris Danielson (E- mail); Jay Johnson (E-mail)
Subject: Pony Express Autowash
Scott:
Here are a few comments I have regarding the latest Grading and Drainage
Plan for the Pony Express Autowash as submitted by Curiskis Architects,
I nc.:
We normally would not like to see so many curb cuts leading to "open
drainage ". However, since the drainage pond is so close to the south and
the drainage ditch is so close to the west, these should function
adequately. Any maintenance and/or repair of these outlets will be the
responsibility of the developer /owner since they are internal to the site
(on private property).
We do recommend that more existing contour information be shown as
it pertains to the existing pond to verify its location and elevations with
respect to the proposed improvements (curb and gutter, curb cuts).
The existing drainage ditch around the west side of the property
currently has a grade of approximately 1 % (adequate for overland drainage)
and side slopes of approximately 4:1 (adequate for maintenance and
accessibility). The proposed improvements expand into this drainage ditch
and result in a ditch grade of approximately 0.33% (inadequate for overland
drainage) and side slopes of approximately 1 % :1 (inadequate for maintenance
and accessibility). It appears this ditch lies within their newly acquired
property (which used to be MnDOT right -of -way ?) and is encompassed by a 10'
drainage and utility easement. If the City is responsible for maintaining
this drainage ditch, Jay should indicate whether this is acceptable to
Public Works or not. Also, from the information provided, we cannot
determine how much storm water runoff is tributary to the drainage ditch to
verify its capacity.
One other issue is that I would recommend the sewer and water
service locations and depths be shown, since this is a rather unique lot
configuration and set back a significant distance from Neil Avenue.
Please call if you have any questions or require additional information.
Thanks.
Dennis M. Postler
Sonestroo, Rosene, Anderlik & Associates
2335 West Highway 36, St. Paul, MN 55113
Direct: (651) 604 -4815
Office: (651) 636 -4600, x4815
Fax: (651) 636 -1311
Cellular: (612) 865 -9187
E -mail: dpostler@bonestroo.com