HomeMy WebLinkAboutRICHARDS LAKE PUD REPLAT LOTS 8-10 - Filed GC-GENERAL CORRESPONDENCE - 2005-02-11KrA InK'1 Inter -Mountain
Engineering Ltd.
July 14, 2004
City of Fort Collins, Planning
P.O. Box 580
Fort Collins, CO 80522-0580
Re: Richard's Lake PUD, Filing 1
Re -Subdivision of Lots 8-10
The undersigned reviewed utility record drawings provided by Nolte and Associates and
field data obtained by Inter -Mountain Engineering's survey crew regarding existing utility
services in and around Richard's Lake PUD, Filing 1, lots 8-10. Based on that
information, water and sewer services are provided to each, revised lot 8-10. There is no
visible evidence of existing utilities in the utility easements being vacated by the re -
subdivision plat.
The overlot grading and drainage modifications associated with the re -subdivision were
submitted to (with the enclosed letter stating that there is no substantial effect on drainage
due to the overlot grading modifications) and approved by City staff on 5-6-03. To
facilitate your review and approval of the re -subdivision plat, both sheets C19 (the
affected overlot grading plan) and C50 (the developed drainage plan) were revised again
(revisions 6 and 10, respectively), to show the re -subdivided lot lines only.
This document is not a guaranty or warranty, either expressed or implied. It was prepared
for the exclusive use of the City of Ft. Collins. If you have questions or concerns, please
do not hesitate to contact me.
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8302 Continental Drido Road, Suite 8107 - Uttleton. Colorado 80127 - Phone: 303/948-6220 - Fax: 303/948-6526
77 M< tcalf Rnad. lt200 - Rox 978 - Av: n, Colorado 81620 - Phone: 970c049-5072 - From Denver Direct: 893-1531
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February 6, 2003
Basil Harridan
City of Fort Collins, Stormwater Utility
235 Mathews
P.O. Box 580
Fort Collins, CO 80522-0580
Dear Mr. Hamdan:
In October 2002 representatives of City staff, the developer of Richard's Lake PUD,
Charter Homes and Inter -Mountain Engineering met to discuss proposed revisions to the
overlot grading plans for Richarj:s Lake PUD. The revisions are intended to
accotmnodate placement of Charter Homes products on Lots 8-27, 236-244, 250-258,
and 271-281. City staffgenerally supported the proposed changes but asked that IIvIE re-
calculate the contributing drainage areas for affected sub -basins and basins and submit a
statement with the proposed revisions certifying that the proposed overlot grading
changes would not result in any substantial affect to drainage in the PUD. Copies of the
proposed revisions including overlot grading plan sheets C18 and C19 and developed
drainage plan sheet C50 (indicating the recalculated contributing areas) are enclosed.
As you can see, the contributing area of the basins changed less than 1% from those
indicated in the approved Master Drainage Study (July 2000) and letter revision (October
2001). In most cases, the contributing area of affected sub -basins changed less than 10%.
However, in sub -basins 208, 304, 309, 409, and 411, where the increase in contributing
area was greater than 10%, IME estimated the increased flows on a percentage basis, and
verified that the planned street, inlet, and pipe capacities met the requirements of the
City's Storm Drainage Design Criteria and Construction Standards. (Because the changes
are relatively minor, we did not revise the model input to the UD-SWMM.)
On this basis, there is no substantial effect on drainage in the PUD as a result of the
proposed overlot grading modifications.
If you have questions or concerns, please do not hesitate to contact me.
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8392 Continental Divide Read, Suite #107 • I iftlatnr omo7 . oi. ------- ---_