HomeMy WebLinkAboutLEMAY AVENUE ESTATES - PDP - 37-04 - SUBMITTAL DOCUMENTS - ROUND 2 - GEOTECHNICAL (SOILS) REPORTEarth Engineering Consultants, Inc.
Everitt Companies
March 2, 2005
Page 2
drain to interior sumps where pumps could be installed to remove that water if water
accumulation is observed. It is common not to install pumps at the time of home
construction unless the accumulation of water is noted in the sump areas. Generally, the
water we are referring to is in small quantities and intermittent.
It was not our intent in our October 2004 report to suggest that an area sub -drain would
be needed for this development and we do not believe this to be the case. We almost
always recommend the installation of perimeter drains around the individual units as a
prudent precaution to intercept any potential surface infiltration adjacent to the homes.
We appreciate the opportunity to be of service to you in this project. If you have any
questions concerning this report, or if we can be of further service to you in any other
way, please do not hesitate to contact us.
Very truly yours,
Lester L. Litton, P.E.
Principal Engineer
cc: Shane Olt
— City of Fort Collins
Troy Jones
— Mt. Torgerson Architects
Marc Virata —
City of Fort Collins
George Schock
— Northern Engineering
March 2, 2005 MAR 1 S 2005
Everitt Companies
3030 South College Avenue, 2°d Floor
Fort Collins, Colorado
Attn: Mr. Stan Everitt, Executive Vice President
Re: City of Fort Collins Staff Review Comments
Sub-Drain/Under-Drain Systems
7224 South Lemay Avenue
Fort Collins, Colorado
EEC Project No. 1032177
Mr. Everitt:
I
r
EARTH ENGINEERING
CONSULTANTS, INc.
Our geotechnical subsurface exploration report for the above referenced project dated
October 31, 2003 was submitted to Mr. Dave Brown at KEM Homes in November of
2003. We have recently received various City of Fort Collins Staff Review Comments
concerning a sub -drain or under -drain system for the development. Our
recommendations with regard to an under -drain or sub -drain system are provided with
this letter.
As a part of our subsurface exploration on this property, five (5) soil borings were
extended to depths of approximately 15 feet below current site grades. Those borings
generally encountered sandy lean clay overlying weathered claystone/siltstone bedrock.
Ground water was observed in only one boring, at a depth of approximately 14 feet below
present ground surface. As indicated in that report, we believe significant fluctuations in
those ground water levels would be required to impact any of the site construction.
In our subsection on "Below Grade Areas," beginning on page 8 of our report, we
suggested that perimeter drain systems should be anticipated for below grade areas for
site structures to reduce the potential for development of hydrostatic loads on the below
grade walls and/or infiltration of surface water i.e. rain, lawn watering, and/or snow melt,
into below grade areas. Although we suggested those perimeter drains could be
"daylighted" it would be our expectations the perimeter drains would be more likely
4396 GREENFIELD DRIVE
WINDSOR, COLORADO 80550
(970) 224.1522 FAX (970) 663-0282