Oakbend Addn-CS 900713 FILE COPY
GINN, INC. / CONSULTING ENGINEERS
city of Coppell ~
Dear Ms. Daneshmand:
As requested we have reviewed the June 26, 1990 letter and
attachments from Nathan D. Maier Consulting Engineers regarding
the offsite drainage as it relates to the adjacent Cistercian
property. The documentation enclosed with the June 26, 1990
letter clearly supports Nathan D. Maier Consulting Engineers'
position that they have made reasonable attempts to work with the
owners of the neighboring property. However, the adjacent
property owner, through his attorney, has made some valid points,
the most pertinent of which are the following:
The primary drainage problem is the stormwater runoff
crossing the alley along Cistercian's west property line.
As stated in Cistercian's responses to Nathan D. Maier
Consulting Engineers, the current zoning of the Cistercian
property is such~that a future development would not require
or be allowed use of the alley unless a zoning change to
single-family residential is obtained for the property.
Therefore, the alley is of little or no benefit to
Cistercian.
A "downstream" property owner d~es have the ~ight to object
to increased runoff entering his property due to development
of his "upstream" neighbor's property.
In this case, it appears that unless Centex, through Nathan D.
Maier Consulting Engineers, can arrive at an agreement with
Cistercian to allow extension of storm sewer outfalls or
temporary ditches on their land, then they must either sheet flow
the runoff as proposed or design and construct an enclosed system
which would discharge through modifications to the other storm
sewer lines proposed in the engineering plans. It appears that
no agreement may be reached with cistercian in this matter.
17103 Preston Road · Suite 100 · LB 118 · Dallas, Texas 75248 · Phone 214/248-4900
The proposed "sheet flow" of water onto the adjacent property can
easily lead to future drainage problems on the adjacent property
quite similar to some which are currently being corrected by the
City of Coppell at taxpayer expense. We do not recommend
allowing the stormwater runoff to "sheet flow" across the alley
onto the adjacent property.
The remaining alternatives appear to be:
The City of Coppell proceed with condemnation for the
required offsite drainage easements across the Cistercian
property, or;
Require the Engineer to revise his grading and drainage
plans to collect the increased stormwater runoff and
discharge it via the proposed storm sewers.
Our most recent review comments and plan mark-ups indicated to
the Engineer that the City of Coppell would prefer that the
normal alley section be used along the east property line and
that the runoff in the alley be collected in inlets and piped to
the proposed storm sewer systems beneath the streets. We think
that this approach should be studied by Nathan D. Maier
Consulting Engineers prior to consideration of approval of their
Final Plat.
Please call me if you have questions.
Sincerely,
Karlsruher, P.E.
JCK/dsp
cc: File 90441