Riverchase(5)-CS 870421 NORTHERN REGION PROJECTS
REQUEST FOR A POINT OF ENTRY
CONTRACTING PARTY: City nf On[~[~l 1
PROPOSED PROJECT NAME.~ Riverchase
DESIGN ENGINEER: Nathan D. Maier Consulting Engineers, Inc.
CONTACT: Janet Vick TELEPHON£ NO. 739-4741
LOCATION OF PROPOSED CONNECTION (TRA NOMENCLATURE). NOTE: DETAILS CONCERNING
IRA INTERCEPTORS ARE AVAILABLE FROM THE PROJECT BUT SHOULD BE VERIFIED IN THE
FIELD PRIOR TO SUBMITTAL.'
PROJECT CRWS x TMC
INTERCEPTOR: Coppell Interceptor
STATION NO.: 130 + 98
PLANNED LAND USE FOR THE AREA TO BE SERVED: 93% Residential 7~ Commercial
-ACREAGE:. 221~ Acres
INITIAL FLOW EXPECTED: 0 MGD (DAILY AVERAGE) 0 MGD (PEAK)
ULTIMATE FLOW EXPECTED: 1.3 MGD (DAILY AVERAGE) 3.38 MGD (PEAK)
BASIS FOR ESYABLISHING FLOWS: Based on 3.6 people/unit as per zoning
density., for average daily flow. Peak flow equals 2.5 times
average daily flow plus infiltration. Infiltration of 500 GPD/Acre.
TYPE OF CONNECTION: .
EXISTING MANHOLE: CONSTRUCT MANHOLE~ x
SIZE OF. CONNECTION: 15 SLOPE AT CONNECTION~ 0.i'5%
'MATERIAL OF CONNECTION: PVC
METERING FACILITY PROPOSED? YES x NO
TYPE
~TACHMENTS ACCOMPANYING THIS REQUEST CONTAIN: (PLEASE CHECK)
CONNECTION: METERING ~CILITY:
PLAN SHEETS x PLAN SHEETS
PROFILE SHEETS x PROFILE SHEETS
SPECIFICATIONS CONSTRUCTION PRINTS
CONSTRUCTION SPECIFIC~IOHS'
EQUIPMENT SPECIFIC~IONS
GENE~L:
SERVICE AREA ~P × (INCLUDES D~INAGE AREA, CITY
~ BOUN~RIES, AND NAME OF DEVELOPMENT)
REQUEST SUBMI~ED BY: /~// Y~t
SIG~TURE:
CONTRACTING PARTY: ~Cit Coppell
TRA USE ONLY
POE NO.
THE ABOVE POINT OF ENTRY IS HEREBY ,~ SUBJECT TO THE FOLLOWING
CONDITIONS:
SIGNED: ~ DATE:
APPROVED BY: DATE:
CC: NORTHERN REGION OFFICE
ZONING CRITERIA
MF-2 = 24 units/AC
MF-1 = 18 units/AC ,
SF-0 = 1 unit/4000 Sq. Ft.
R = 0.1 Gal./Sq. Ft. Floor Space (50% AC) ..
0 = 0.2 Gal./Sq. Ft. Floor Space (50% AC)
Based on 3.6 persons/unit
ND~ '" "' '"'
¢ONIULTIHG BNGINEEII, INC,
D&II&I, Texie
1;1} 111,'1'11%11;
September 29, 1988
Mr. Steve Goram
City of Coppell
P.O. Box 478
Coppe~l'~ TX 75019
Re: 15" Sanitary Sewer Line - Riverchase
Dear Steve:
We have reviewed the above subject plans for your concern
regarding the backing up of sewage in the subject sewer line.
Our review took into consideration your statement that the sewage
is backed up approximately 320' from the point of entry to the
TRA interceptor. After review of the as-built plans showing the
angle of entry where the 15" SS ties into the TRA system, we
recommend that further engineering be pursued to improve this
present condition prior to final acceptance of the facility.
It would be appropriate in this situation to have Terra and their
consulting engineers re-evaluate the situation and propose an
acceptable solution to you that will alleviate this present
backing up situation. On a gravity sewer line, the city should
look for a design that allows for the discharge of sewage to not
be restricted by any opposing velocity head.
We hope this accommodates your concerns.
Sincerely,
Kevin Pei f{e~'
KP/dsp
cc: Russell Doyle
H. Wayne Ginn
File 305L-