HomeMy WebLinkAboutFOSSIL CREEK ESTATES PUD PRELIMINARY - 50 92D - CORRESPONDENCE - RESPONSE TO STAFF REVIEW COMMENTS (5)October 6, 1993
Project No: 1318-01-92
Kirsten Whetstone
City of Fort Collins Planning Department
P.O. Box 580
Ft. Collins, Colorado 80522
Re: Fossil Creek Estates; FL Collins, Colorado
Dear Kirsten,
The following represents our. response to several comments provided in your letter of September
27, 1993. Generally, this response is relative to engineering related items and supplements the
response letter provided by Jim Sell Design.
Item 7.
There were minimal comments noted on the utility plans which were returned to us. The
Fossil Creek Drive transition from a Boulevard section to a standard local section appeared to
be the main issue. Most engineering comments will be addressed in detail at final design.
We have received a letter from the Fort Collins Water District and the South Fort Collins
Sanitation District which is dated September 15, 1993. We have also met with the water and
sanitation district on several occasions and understand all requirements of the district.
Specific plan requirements will be addressed with final utility drawing preparation.
Item 15.
The title "PRELEVIINARY / FINAL SITE AND LANDSCAPE PLAN" has been revised
to the following; "PRELIAMIINARY PLAT, SITE AND LANDSCAPE PLAN".
According to Preliminary P.U.D. submittal requirements presented in the City of Fort Collins
Development Manual, the preliminary plat does not need to be a separate document, but may
be incorporated with the Preliminary P.U.D. Plan.
Item 16.
The Fossil Creek Drive transition has been modified on the Preliminary Plat, Site and
Landscape Plan. There are no specific transition specifications presented in the current City
of Fort Collins Street Standards and Specifications. Final geometry of the transitions are
being discussed with Kerrie Ashbeck and Mike Herzig and will be implemented with final
utility plan preparation.
Item 17.
An updated soils report has been prepared by Empire Laboratories, Inc. and is titled
"Preliminary Geotechnical Engineering Report; Fossil Creek Estates"; E.L.I. Project No.
20935229; report dated September 21, 1993. The report covers the entire area. A copy of the
report has been submitted to your department. Another copy is attached for your review and
files.
We are fully aware of the expansive nature of the soils, potentially adverse groundwater
conditions, and the need for engineered foundation and dewatering systems. These
geotechnical items were determined in the original phase 1 geotechnical investigation report
for the eastern 10 acres. The original report was prepared by Empire Laboratories, Inc. and
is dated August 28, 1992. The most current report was ordered well before preliminary
submittal, but completed just recently. Note that the date on the report precedes the date on
the comment letter.
4836 S. College, Suite 12 Fort Collins, CO 80525 (303)226-5334
PAGE 2
October 6, 1993
Project No: 1318-01-92
Re: Fossil Creek Estates;
Item 20.
Ft. Collins, Colorado
We expect the impacts of development to the existing lower wetlands areas to be negligible
for several reasons. Underdrain system outlets, although now presented in point discharge
form, will be directed to the wetlands area. Initial dewatering of the development will
increase flows, but will stabilize to an equilibrium which can only be beneficial to the
wetlands areas. Groundwater flow movement not intercepted by the underground dewatering
system, will continue to migrate underground to the wetlands areas.
Storm drainage point discharge locations will be provided with erosion control devices for
protection of downstream wetlands and drainage systems. Stonnwater peak flow velocities
will be controlled. Several drainage discharge points have been provided to minimize
impacts of single direct point discharges. The potential lining of the ditch will not
dramatically affect the groundwater supply flows. Groundwater is introduced to the site from
other sources other than the ditch.
Item 31.
Lots with significant slopes will be utilized for residences with walkout basements.
Regrading after residence construction will create an eight foot (8') grade difference along
the length of the residence and allow for a more moderate slope of the rear yard areas. Storm
drainage flow velocities are greatly reduced with these conditions. Erosion control during
construction will be provided according to the requirements and specifications of the Storm
Water Utility for erosion control. Downstream areas will be protected throughout. A
statement was presented on page 5 of the Preliminary Drainage and Erosion Control
Report which states; "Erosion control device maintenance, both onsite and offsite, will
remain the responsibility of the developer until the subdivision is completely developed. This
includes completion of housing, yard surfacing, which until completed, contributes to erosion
potential". This statement will be included in the Final Drainage and Erosion Control
Report. There will be a general note provided on the final utility plans indicating the same
requirement.
This completes our response of
Fossil Creek Estates Preliminary
item, please call at 226-5334.
Sincerely,
Brian—W. Shear, P.E.L/
Shear Engineering Corporation
BWS / jmb
attachments
cc: Fossil Creek Partners
Jim Sell Design
the preliminary comments for engineering related items for
If you have questions, or require further information on any
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