Townhouses-CS010209Memo
To: Keith
From: Steve Topletz
Subject: Coppell TH
Date: February 9, 2001
Keith:
I have enclosed the ~:pical design for the retaining walls on the property and should be utilized in
all locations on the property where stone walls are to be located.
I will need the plans approved by the City of Coppell for installation where walls are called.
Let me know ASAP when the plans are approved, we need to commence this portion of the
construction to backfill the spoils of the utilities.
Steve
S^. E.6 . m.6 & TESTING, NC. Fa,.-e
1~ Serving The Goo-Industry Since 1974 ~
1115 Luke Street, Suite 100 -_-r,,.-: ..... ta,
Irving, Texas 75061
Phone: (972) 790-1910 · FAX: (972) 790-0967
February 5, 2001
Andante Development Company
206 Fairway Meadows
Garland, Texas 75044
Attention: Mr. Steve Topletz, President
Subject: RECOMMENDED SECTION OF EROSION PROTECTION
FLEXIBLE RETAINING WALLS
Proposed Town Houses of Coppell
MacArthur Boulevard
Coppell, Dallas County, Texas
SE&T Project No.: 59E5KI
Gentleman:
SAM Engineering & Testing, L.P. (SE&T) is pleased to submit the recommended section of
erosion protection flexible retaining walls at the subject site. These services were performed in
accordance with authorization dated December 20, 2001.
1. In the development of the recommended wall designs, we utilized the data in the supplied
soil report by Alpha Testing (report #00430 & dated 11-10-2000), grading plans for the
project by NDM (Job #99-10-13, file #9113Gl01 & dated 4-10-2000), the supplied data
showing that all proposed buildings will be supported on piers, data obtained from our
site visit and our experience.
2. The recommended section of the erosion protection flexible retaining wall is shown by
the attached Figure 1 & design table. The following should be realized and/or performed:
a. The recommended walls are "Erosion Protection Retaining Flexible Walls" and
are NOT "Structural Retaining Walls".
b. In the design of the walls, it was assumed that all proposed buildings will be
supported on piers and that negligible or no lateral loads will be transferred to the
walls from buildings.
To=st ng In'.:est,gat~on
Andante Development Company Em. ir:nmema,
SE&T Project No. 59E5K1
February 5, 2001
page two
c. The perforated drainage pipe at the back of the walls can be connected to a solid
PVC pipe and made to discharge at the lower elevation areas to the east.
d. The optional weep-holes should be either connected to a solid PVC pipe and made
to discharge at the lower elevation areas to the east OR be made to discharge on to
a concrete drainage flume along the toe of the walls.
e. The grades along the toe of the wall should be sloped away from the wall to
enhance surface water run-off.
f. The construction of the above recommended walls should be inspected,
monitored, and certified by a professional.
It has been a pleasure serving you on this project and we trust that this report is satisfactory. If
you have any questions regarding this report, please do not hesitate to contact us.
..
Very truly yours,
SAM Engineering & Testing, L.P.
s.'{ ) - , , .., ..,..
Civil & Environmental Engineer
Texas Professional Registration No: 61893 ~,~ ~,-..n:~,.% ;: ~$.~r~o,~ ~-,~
2-10 Home Buyer Warranty (HBW) No: 8827 ~ f~:'-~"*,,.-*'" ~-~ /
Home of Texas/Residential Wan'anty Corporation (RWC) No: 633 2/-
Three Copies Submitted
G:;2001 ~59E5K 1 ~lctter\walldes.wpd
Recommended Design Table
Maximum Wail Desinn O~on ~1 Dealc, n OofiOn #2 Minimum Depth of
Height (H) Above Minimum Top Wall Minimum Bottom Wall Minimum Top Wall Minimum Bottom Wall Wall footing (D) below
Ground (feet) Width (TWW) (inches) Width-footing (BWW) (feet) Width ('I%N~/V) (inches) Width-footing (BWW) (feet) Final Grade (feet)
3 6 I 12 I 1
5 8 2 12 2 1.5
8 12 3 12 3 2
10 14 4 12 5 2.5
15 18 6 · 12 7 3
Stone-faced Maximum Slope 4:1
! .
Gr~vityWall ?~--TWW ! ~ ! Minimum 12" ,
~.--- o~O^ ol3°~
~ ~'00 ~~~0 On-site Soils
~.~,m~.,, / ~ I I ~0~:,-°~~'
'-" ~1' I' ~'~Gt
~~ ~ Filter Fabric
j ........ ~ I I 4" maximum diameter pe~orated
(0.2fi~ v~dieal to ~2"
'.
SAM ENGINEERING & TESTING, L.P.
Sewing The Ge~lndust~ Sin~ 1974 SE&T Project ~: 59E5K1
Iwing, Texas 75~1 Approx. Scale: As Shown
Phone:(972) 79~1910 Fax:(972)790~7
Drown By: SAM
Figure t: Recommended Se~ion of Erosion
Prote~ion Flexible Retaining Walls Date: 215101
Project: Proposed Townhouses of Coppell
g:~2001file~59e5k1\figure~RSEPFRW. XLS