Response to Planning 2 Comments.pdfMay 12, 2014
Jen Machuga
Associated Planner
City of Edmonds
1215' Ave N.
Edmonds, Washington 95020
Re: Building permit applications #BLD2013404
Site Address: 726 Sprague St.
Dear Ms. Machuga:
The following are the locations of corrections requested by the you. They are
numbered the same as the original.
a. See Sheet A2. Shading has been changed.
b. Okay.
From Shane Hope
"Given the Reid -Middleton (surveyor) letter and the plot plan overlaying
the 1950 and 2013 contour lines, I'm fine with using the current (2013)
contour lines as the base for the house's height. That has been
communicated with Jena so she can proceed. Thanks for providing the
additional information."
If you have any further questions please call or e-mail.
Thank you,
Chris McGinness
206-853-4385
cmcginness@frontier.com
April 28, 2014
File No. 222014.008
Mr. Chris McGinness
3521 147th Place SE
Mill Creek, WA 98012
Subject: City of Edmonds Plan Review #BLD20131404
726 Sprague Street, Edmonds, WA
Dear Mr. McGinness:
As you requested, I have researched the origin of the elevation contours described as
"pre-existing" contours on the Grading Plan prepared by Reid Middleton in 1980 for
"Sproule McGinness, Lots 6 thru 13, Block 85, City of Edmonds" and can report the
following:
The contours identified as "pre-existing" were derived from a 5 -foot contour
interval, I" = 200' aerial map of Edmonds and scaled up to I" = 20' and
incorporated into the grading plan submitted to the City at that time.
The aerial mapping was not generated specifically for this project, which
would have increased the accuracy of the mapping, but appears to be a
citywide aerial map. The segment used appears to be roughly one-half mile
square.
The vertical datum of the map is NGVD 1929, generally 3.6 -feet lower than the
current NAVD88 elevation datum. (100 -feet NGVD29 equals roughly 103.6 -
feet NAVD88).
Vertical mapping accuracy for a 1980 5 -foot contour aerial map would be
approximately equal to the contour interval or plus or minus 5 -feet.
With the inherent datum difference and the inaccuracies associated with the 1980 era
aerial mapping, my conclusion is the "pre-existing" contours shown on the 1980
Grading Plan would only have an expected accuracy of 5 -10 feet when compared to a
NAVD88 elevation on the site today.
Mr. Chris McGinness
April 28, 2014
File No. 222014.008
Page 2
I trust this information is helpful to you. If you have any questions or would like to
discuss the issue further, please give me a call.
Sincerely,
Reid Middlet9n Ind
Michael G. Yeoman, P
Survey Group Director
WA PLS 19651
OR PLS 02414
ID PLS L-6240
MT LS 14857LS
http://www.t-eidiniddleton.coi /p�eolel�mike �html