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To: Leslie Jones
From: Gary Stadele
Trilby Lateral President
828 Scenic Drive
Fort Collins, Co 80526
Date: March 14,2003
Subject: Concerns on
#49-95E Harmony Ridge; Phase 1-
Replat of Lots 16-22 & Tract7
The Trilby Lateral has concerns about moving the storm water pipe parallel and only 10
feet away from the Trilby Lateral irrigation ditch.
I've attached a marked up portion of sheet 3 of 8 which shows my primary concern about
moving the storm water pipe parallel to the Trilby Lateral irrigation ditch.
Water from the Trilby Lateral will seep through 10 feet of soil to the storm water pipe.
The storm water pipe will be on a layer of gravel which will act as a path for the water to
follow. The water will flow to the point that the storm water pipe crosses the Trilby
Lateral. Where the storm water pipe crosses the Trilby Lateral a very large elevation
change occurs which will cause the water to flow fast and move soil with it. This could
cause the Trilby Lateral to be undercut and eventually a complete washout could occur.
It is very common along the Trilby Lateral to encounter very porous soils. There are
sections that have a almost shale like soil. Thus I believe that it is very likely that
significant leakage from the ditch to the storm water pipe will occur. This section of the
ditch in wet years tends to have a spring water flow which indicates a porous soil that
water can move through.
A second concern is the construction phase of the storm water pipe. During this
construction it is likely that soil and rocks will fall into the Trilby Lateral. If the
construction is done when water is flowing this could cause the Trilby Lateral to become
dammed and overflow it's banks. It is unknown at what point a overflow would occur.
The Trilby Lateral is a very flat ditch and the overflow could backup all the way to the
Ridge where it could flow on to houses.
The Trilby Lateral requests that you move the storm water pipe further away from the
Trilby Lateral and to a higher elevation. The pipe should be moved enough so that the
bottom of the trench that that the storm water pipe goes into be at a higher elevation than
the top of the Trilby Lateral. If this is done then no water flow from the Trilby Lateral to
the storm water pipe is possible.
P Steve Olt -Trilby Lateral Comments on nony Rige Phase 1 replat��
From: <gary_stadele@agilent.com>
To: <ljlove@attbi.com>
Date: 3/14/03 2:58PM
Subject: Trilby Lateral Comments on Harmony Rige Phase 1 replat
Leslie
I've attached the letter that I wrote last night regarding the relocation of a storm water pipe in Harmony
Ridge.
On the phone today you stated that the elevation of the storm water pipe is above the elevation of the
Trilby Lateral. This was not my understanding so I'll need to check on that.
Gary Stadele Agilent Technologies Inc
Technical Support Engineer 815 14th Street S.W.
Gary_Stadele@agilent.com Loveland Colorado, Colorado 80537
970-679-3483 Mail stop: CU326
970-679-5260 FAX
CC: <glstadele@attbi.com>, <sjoy@fcgov.com>, <bhamdan@fcgov.com>