SC-Lee E2-CS 901107 GINN, INC. CONSULTING ENGINEERS
November 7, 1990
Ms. Shohre Daneshmand, P.E. J ~
City of Coppell ~
P.O. Box 478
Coppell, TX 75019
Re: Lee Elementary School
Drainage Plan
Dear Ms. Daneshmand:
We have reviewed the above referenced plans for general
conformance to the City of Coppell ordinances and standards. The
following sets forth our comments.
1. We reviewed this plan separately from the "conceptual"
drainage plan and also the Coppell Church of Christ plans,
even though all three are relative to each other.
2. We would recommend placing an underground conduit across the
length of the property in lieu of the open ditch concept, if
at all possible. The 8'x8' wye inlet will become an
attractive nuisance for the school children and the 160
c.f.s, flow of water could be potentially dangerous.
3. Identify whether the 50' drainage and utility easement is
existing or proposed. If proposed, is the Coppell I.S.D.
willing to dedicate the needed easement?
4. Indicate 100-year water surface on ditch cross section.
Will water be contained within ditch boundaries?
5. If ditch is constructed, suggest that top bank along west
property line be set off property a minimum of 3 feet.
Also, if channel is constructed, concrete pilot channel is
required.
6. Who is responsible for maintaining channel? Please address.
7. Excavated channels shall be landscaped according to the
Subdivision Ordinance. What provisions are made for this
project?
8. If the 8'x8' inlet is allowed, it shall be faced with either
brick or stone.
17103 Preston Road · Suite 100 · LB 118 · Dallas, Texas 75248 · Phone 214/248-4900
9. What, if any, access is available to the drainage easement
for maintenance purposes?
10. Reference the "erosion control" - how long will the straw
bales last? How adequate are the bales for velocity
dissipation? Seeding is not acceptable for side slopes~
sodding is required.
Other than the above stated items, we have no further objections
to the plans as submitted. Should you have any questions or need
additional information, please contact our office.
Sincerely,
Gabe Favre
GF/dsp
cc: Steve Goram Taryon Bowman
Dan Dowdey and Associates
H. Wayne Ginn, P.E.
File 90441