Creekview Add PD-CS 900803COPPE?.?.. PUBLIC WORKS
~MORANDUM
DATE
August 3, 1990
FROM
RE:
Dale Jackson, Building Official
Shohre'Daneshmand, Acting City Engineer ~
Floodplain Activity - Proposed Deck
Creekview North Addition/601 Tower Court
I have ~eviewed the above referenced, proposed deck in detail. As
you know, we have received the draft City Wide Storm Water
Management Study prepared by Albert H. Halff and Associates, which
identifies that there is severe erosion in Grapevine Creek between
Denton Tap Road and Moore Road (see attached Fig. VI-1.) I asked
that the requestee, Mr. David Gregg with Northlake Fence, provide
me with (as minimum) surveyed sections, grading plan, slope
stability analysis, structural analysis and details for posts
(piers), etc. prepared by a registered professional engineer and
surveyor. I have received some of the needed information which
has.been helpful, but not complete.
Based on my review, it is apparent that in the case of 100-year
storm, the proposed posts will be partly under water (100-year
water surface elevation is (481.9'.). For this reason, it is
important that said posts are designed by a structural registered
.engineer, who should check the foundation stability. Therefore,
we recommend that proposed deck be designed by a structural
engineer, and that the requestee provide the City with a letter
holding the City harmless of any damages that may result from this
floodplain activity.
In conclusion, if above requirements are met, we donft have any
objection to this proposal. Please note that one item, in favor
of this request, is that the proposed deck appears to be about
ninety feet (90') away from the Creek's top of the bank, requiring
inspection by your staff.
Attached, please find a draft copy, for our immediate use, of some
recommended requirements for building permits along creeks and in
floodplain areas prepared by our consultant, Albert H. Halff, which
will be included in the final Storm Water Management Report.
Please call, if you have any questions.
xc:
Steven G. Goram, Director of Public Works
Gregg Jones, Building Inspector