Enclaves-CS 951114 Commemora ting
20 Years of Quality
Consulting Services
Espey, Huston & Associates, Inc.
Engineering & Environmental Consultants
November 14, 1995
Mr. Mike Martin Via Fax: 304-3570
Engineering
City of Coppell
255 Parkway Boulevard
Coppell, Texas 75019
Subject: Enclaves on the Parkway -- Weir Erosion Control and Channel Slopes
Dear Mike,
We have had several contractors look at the area below the existing weir and have decided that
the best solution would be to place a milsap type stone below the weir approximately four feet
downstream and slope the stone back to the weir. The stone above the normal pool elevation
will be grouted in place. We feel that this will control the potential erosion and in addition it
is also the most aesthetically pleasing. Jimmie Beasley with Land Tech Hardscape Specialists,
Inc. will be performing the work for us. He plans to move in next Wednesday, November 22
and should complete the work by Friday December 1. Although this seems like a long time
please keep in mind the working conditions, access and the Thanksgiving holiday.
Attached are the field elevations from Dowdey, Anderson for the slopes on the east side of the
channel. As you can see we have the ability to get the required 3:1 slope, but it is not graded
correctly today. The problem is we left a four to five foot shelf at the top of the slope adjacent
to the existing fences. I have scheduled Texas Environmental to come in and hand grade this
area and generally dress up the slope. Once this work is completed we will have met the 3:1
criteria. I expect them to move in Tuesday November 21 and finish up their work by Tuesday
November 28.
You ask about the existing fences along the top of the slope; since we are hand grading this
area and will not really be removing material at the fence I do not believe it will cause any
problems with the existing fences. We should not be removing enough material near their
fence to significantly impact the lateral resistance of the post.
13800 Montfort Drive, Suite 230 · Dallas, ~exas 75240-4347
A PLANET PACIFIC COMPANY (214) 387-0771 TEL · (214) 387-9714 FAX
11/17/95 16:12 ~"2144790397 WI LBOW-DALLAS ~[~ 003/003
Esl)mY. Huston & Associates, Inc,
Mr. Mike Martin
Thc Enclaves on thc Parkway
Page 2
I hope this safisfi~ you conccn~ r~gardh~g the weir and thc channel slopes. Thank you for
you help and cooperation.
Ke/th lacks~
attachment
The Enclaves on the Parkway
Coppell, Texas
Slope Verifications
November 9, 1995
East Side adjacent to Parkview Addition
Lot 1,2: Prop. Line (P.L.) 463.9 d=23'
Top of Bank (T/B) 463.4 d=18'
Top of Wall (TAN) 456.74
Existing Slope 2.7:1
Slope P.L. to TAN 3.2:1
Lot 5,6: P.L. 464.0 d=23'
T/B 463.8 d=l 8'
TAN 456.49
Existing Slope 2.5:1
Slope P.L. to TAN 3.1:1
Lot 9,10: P.L. 464.0 d=23'
T/B 463.9 d = 18'
TAN 456.53
Existing Slope 2.4:1
Slope P.L. to TAN 3.1:1
Lot P.L. 464.0 d=23'
12,13:
T/B 463.8 d=l 8'
TAN 456.82
Existing Slope 2.6:1
Slope P.L. to TAN 3.2:1