Riverchase(5)-CS 880718 CONSULTING ENGINEERS, INC.
July 18, 1988
Mr. Steve Morton
City of Coppell
255 Parkway Blvd.
Coppell, Texas 75019
Re: Riverchase Drive Sanitary Sewer
NDM No. 87-12-151
Dear Steve:
The 15-inch sanitary sewer line which serves as an outfall line for the Riverchase Development
discharges into a 33-inch TRA interceptor on the north side of the railroad. Since the TRA line is
running relatively full and the Riverchase line currently has no flow, water is backing up to some degree
into the Riverchase collection system.
Although this situation will likely cause the deposition of some solids in the Riverchase line, we do not
foresee any major or permanent negative effects resulting from this condition. The deposition that does
occur will be mitigated by the fact that the flow line of the Riverchase line is over 0.6 feet above the flow
line of the TRA line. This will cause the heavier solids to bypass us.
Once Riverchase begins to develop a flow, the problem will be resolved. It may be necessary to flush
the line in the early stages of use to insure its proper operation.
Sincerely,
NATHAN D. MAIER
CONSULTING ENGINEERS, INC.
Mike Daniel, P.E.
MD/rdp
cc: Bobby Harrell
Three NorthPark/8800 N. Central Expwy./Suite 300/Dallas, Texas 75231/(214) 739-4741