NOTES
LEGEND
MH
1. This drawing is copyright and may not be reproduced
without the permission of Mann Williams
MANHOLE
IC
2. All dimensions to be checked on site and any
discrepancies reported to the engineer before work
commences
INVERT LEVEL SET AT 1 IN 100
STORM +30% AS AGREED IN
MARCH 2008
INSPECTION CHAMBER
3. Any ambiguities or discrepancies between this drawing
and any other information given elsewhere must be
reported to Mann Williams for clarification before work
proceeds
NEW STORM WATER PIPE
NEW FOUL WATER PIPE
NEW OUTLET
IL. 16.00
4. All drawings to be read in conjunction with the project
specification with all works carried out in accordance
with the latest British Standards and codes
of practice
EXISTING FOUL WATER PIPE
DRAINAGE FLOW AREA
APPROVED 2,900m² (MARCH
2008). FLOW AREA TO NOT
INCREASE - ADDITIONAL
AREA TO BE ATTENUATED
EXISTING STORM WATER PIPE
INVERT LEVEL
C.L
COVER LEVEL
RWP
RAIN WATER PIPE
POSSIBLE RETAINING
WALL POSITION. TO
BE CONFIRMED
IC.
CL. 18.45
IL.17.655
150Ø 1:80
150Ø 1:80
RWP
EX SWIC09
IC. 18.45
IL.17.60
RWP
EX SWIC08
CL. 18.45
IL.17.48
2.000
150Ø 1:60
IC. 300MM DIA
CL. 18.45
IC. 300MM DIA
CL. 18.45
RWP
IC. 300MM DIA
CL. 18.45
RWP
IC. 300MM DIA
CL. 18.45
.
1.007
NOTE
RWP
EX SWMH06
CL. 17.587
Inlet 16.901
IL. 16.689
IL. 16.08
IC. 300MM DIA
CL. 18.45
150Ø 1:60
RWP
ALL LEVELS TO BE CONFIRMED.
PRELIMINARY INVERT & COVER
LEVELS ONLY
2.002
RWP
IL. 17.627
.
150Ø 1:150
EX SWIC07
CL. 18.45
IL.17.38
2.001
150Ø 1:60
IC.
CL. 17.70
IL.17.270
IC.
CL. 18.45
IL.17.315
150Ø 1:60
150Ø 1:60
150Ø 1:60
IL. 17.610
225Ø 1:60
I.L
NOTES
6. GULLYS TO BE TRAPPED GULLY POTS AS ADDITIONAL
PREVENTION OF OIL CONTAMINATION. GULLYS TO BE
REGULARLY MAINTAINED
7. SEE ARCHITECTS LAYOUT PLANS FOR CAR PARKING
SPACES THAT ARE SELF DRAINING BLOCKWORK
MH
IL. 16.28
150Ø 1:150
8. BRISTISH STANDARDS TO BE APPLIED WITH REGARDS
TO COVER MATERIALS AND ANY NECESSART CONCRETE
PROTECTION TO PIPES
high level
oven
low level d i s h
washer
washing
machine
washing
machine
EXISTING DRAINAGE INFORMATION
PROVIDED BY BATH AND COUNTIES
DEVELOPMENT.
high level
oven
low level d i s h
washer
ORIGINAL SITE HARD STANDING AREA:
2,776m²
INSTALLED
FW IC
CL. 17.90
IL. 17.19
IL. 17.625
high level
oven
low level d i s h
washer
washing
machine
washing
machine
IL. 17.625
high level
oven
low level d i s h
washer
100Ø 1
:60
IL. 17.625
INSTALLED
SW IC
CL. 17.90
IL. 16.95
100Ø 1:60
IL. 17.625
PHASE 1 WORKS AREA:
990m²
PHASE 2 WORKS AREA:
304m²
FFL = 18.635
MARCH 2008 EA APPROVED AREA:
2,900m²
(RAISED ABOVE EA
PROPOSED FLOOD
LEVELS)
1:6
150Ø 1:100
0Ø
0
IL. 17.625
RWP
150Ø 1:100
RWP
RWP
NEW CATCH
PIT MANHOLE
RWP
100Ø 1:6
RWP
01
0
150Ø 1:100
10
150Ø 1:100
514
INSTALLED
1.001
1.000
FW IC
CL.17.95
IL.17.133
1.006
:100
150@ 1
AIR VENT
225Ø
225Ø 1:100
INSTALLED
FW IC
CL.17.95
IL.17.14
RWP
225Ø
SWMH01
CL. 18.580
IL. 17.751 (approx)
225Ø 1:100
RWP
CONNECTION INTO
EXISTING SEWER MADE
WITHOUT MANHOLE
FW IC
CL.17.95
IL.17.125
AIR VENT
1.002
STORMWATER
AS APPROVED
EA ROUTE, 2008
PERFORATED PIPE AND
GRAVEL STRIP SIMILAR
TO DETAIL 01a ON MW
DRAWING 7446_514
RWP OUT RE-ROUTED
THROUGH ATTENUATION
TANK
Smaller attenuation
volume
MANHOLE
LOWERED TO IL.
17.070 TO
PROVIDE FALL TO
UPSTREAM PIPE
REV
MH
IL. 17.10
FALLS TO GULLY
MIN 1:40
AQUACELL ATTENUATION
TANKS WITH GRANULAR
DISTRIBUTION TRENCH.
ATTENUATION AREA TO BE
120 SQUARE METRES TOTAL
(WITH 400mm DEEP CRATES)
PIPE REMOVED & REPLACED
WITH 225Ø PERFORATED PIPE AT
OUTLET LEVEL OF EX SWMH02
OUTLET I.L. TO BE RAISED TO
MATCH INLET TO FORM CATCH
PIT MANHOLE AND PROVIDE
FALL TO DOWN STREAM PIPE
225Ø
GULLY
1.003
RWP
01
514
EX SWMH05
CL. 18.293
IL. 17.132
DATE
02.09.14
04.11.14
07.11.14
MH
IL. 16.94
1.005
EX SWMH03
CL.18.519
IL.17.223
1.004
225Ø
Ø
150
FALLS TO GULLYS
MIN1:40
GULLY
Ø
150
Outflow pipe
restricted to 100mm
EX SWMH04
CL. 18.561
IL. 17.128
EXISTING STORM WATER RUN HAS SUFFICIENT
PIPE SIZE TO ACCOMODATE FLOW FROM
MH
WEIRSIDE SITE. THIS DOES NOT TAKE INTO
CL. 18.350 ACCOUNT WATER COLLECTED FROM FROM
IL. 17.070 OTHER AREAS AS THE TOTAL CATCHEMENT
AREA CANNOT BE ASCERTAINED. THERE IS A
RISK OF THE EXISITNG SYSTEM BEING
SURCHARGED BY THIS NEW CONNECTION
GULLY
WATER ASSUMED TO RUN
AWAY FROM RIVER BEYOND
SITE BOUNDARY
BY
PRELIMINARY ISSUE FOR PLANNING RJC
REVISED AS NOTED
RJC
STORM WATER DRAINAGE REVISED RJC
RWP
EX SWMH02
CL. 18.182
Inlet 17.423
IL. 17.254
HYDRO-BRAKE FLOW
RESTRICTOR FIXED TO
EXISTING MANHOLE.
TYPE Md4
- DESIGN HEAD = 0.5m
- DESIGN FLOW = 0.5l/s
DESCRIPTION
P1
P2
P3
P-PRELIMINARY
T-TENDER
CONSTRUCTION
PROJECT
WIERSIDE RESIDENTIAL
EXTENSION
TITLE
MH
18.35
DRAINAGE LAYOUT
100Ø
MANN WILLIAMS
MH
CL. 18.42
CONSULTING CIVIL AND
STRUCTURAL ENGINEERS
MH
IL.17.03
7 OLD KING STREET
QUEEN SQUARE
BATH BA1 2JW
T 01225 464419
F 01225 448651
E [email protected]
150Ø
DRAWN
CHKD
SIZE
SCALE
DATE
RJC
CW
A1
1:100
AUG 2014
STATUS
PRELIMINARY
PROJECT
DRAWING
REV
7446
501
P3