Red Hawk-CS090318City of Coppell Planning Department
255 Parkway Blvd.
Coppell, TX 75019
Re: PD- 241 -SF /C, Red Hawk
Planning and Zoning Commission
I am unable to attend the March 19`" meeting to discuss the above referenced zoning
change hearing. I live across Bethel School Rd. from the site and have deep concern
regarding the traffic and drainage implications of the proposal.
Traffic:
Bethel School Road is the sole eastern entrance and exit for a significant number of
single and multi - family residences. As such, the street has heavy automobile traffic. The
traffic is particularly congested in the morning hours as cars leave these neighborhoods
for school and work.
Any entrance to or exit from the proposed development will add to this congestion.
Additionally, given the common traffic backups to the west of Denton Tap Road in the
morning hours, an exit from the development on Bethel School Road may pose a threat to
traffic safety as the traffic backup would often block such an exit.
Notwithstanding these concerns, I am not opposed to an entrance to the proposed
development from Bethel School Road, as long as it is designed in a manner to prevent
vehicle exits. (I have noted a one -way entrance to a neighborhood near CMS North from
the 121 frontage road).
Drainage:
Grapevine Creek, which borders the western edge of the development is inadequate to
contain additional storm runoff from the proposed development. Significant erosion
problems already exist in the creek. Additional storm runoff from the proposed
development would exacerbate this problem.
My property borders Grapevine Creek. I have lost a number of mature trees on the creek
bank as a result of storm drainage induced erosion. An examination of the creek makes it
evident that this erosion is recent and is the result of continued development in areas that
drain into the creek. (Note that I raised my concerns about stream erosion with the City
Engineer's Office in 2006 -07 upon becoming aware of the deteriorating stream bank
conditions. In 2007, upon receiving approval from the City Engineer's Office, I installed
a 150-foot retaining wall to contain the erosion problem on a portion of my property.
This was done at a personal expense of approximately $14, 000.)
RECEIVED
' I "? 1 8 2000
PLANNING DEPARTMENT
To demonstrate the erosion problem that currently exists, I have included a number of
photos before and after the installation of the retaining wall. Following is a description of
these photos:
Photo 1: Shows the amount of erosion to the floor of the stream since construction of the
bridge over Bethel School Road (photo is of the south side of the road looking north).
"A" demonstrates that approximately four feet of the stream floor has eroded in the
period since the bridge was built. "B" in the photo shows exposed wire /cable conduits
that presumably were initially buried and are now exposed as a result of continued
erosion.
Photo 2: Shows the considerable erosion to the stream bank looking to the south from the
bridge on Bethel School Road. "A" again highlights the exposed conduit from photo 1 as
well as exposed tree roots and significant wash out of the stream bank.
Photo 3: Shows the extent of the stream bank erosion since construction of the bridge
(from the south side of the bridge). "A" highlights that several feet of soil have eroded
from the level that existed when the bridge was installed.
Photo 4: Shows additional erosion near the street level (looking north at the sidewalk
from the south side of the bridge).
Photos 5 and 6: Show the retaining wall described above (looking south from the south
side of the bridge).
Any additional drainage from the proposed development into Grapevine Creek will
worsen the erosion already evident in the creek. This will lead to the destruction of
additional trees and vegetation that provide an import visual barrier for the homes on
Plantation and Wales Court that back up to the creek to the developments that face
Denton Tap Road.
Prior to approval of the proposed development, the city should commission a study to
evaluate the impact of drainage on Grapevine Creek. Based on the results of that study,
improvements to prevent further stream bank erosion may be required.
Please contact me with any questions you may have regarding my concerns.
Regards,
Orman Anderson
462 Wales Ct.
Coppell, TX 75019
RECEIVED
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