m4 junctions 3 to 12 smart motorway drainage strategy report · m4 junctions 3 to 12 smart motorway...

M4 junctions 3 to 12 smart motorway

Drainage strategy report

Annex

E

J12-J8 Junction drainage drawings

JUNCTION 10

C

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.

6

2

9

0

0

C

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6

1

4

0

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.5

9

6

0

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.5

7800

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3

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3

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3

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.33500

4

6

C

H

.

6

2

3

0

0

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5

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CH

.58700

CH

.5

6900

C

H

.55100

C

H

.

5

3

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1

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3

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4

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C

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3

C

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4

1

6

4

0

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3

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2

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1

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0

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1

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2

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0

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4

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.

3

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1

1

0

JUNCTION 12

JUNCTION 11

JUNCTION 8

A404(M) JUNCTION 9

1

5

2

MSA JUNCTION

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Drawing Number

DateOriginated

ApprovedStage 2 checkStage 1 checkDesigned

Scale at A1

Drawing TitleJob Title

Attached Xrefs : | X-M4-01 Rev 0.2 | 537806-MUH-VR-S3-M2-DR-500003-0 | 537806-MUH-00-S3-M2-GD-500000-0 Centreline

Project Number Zone / Mileage

Highways Agency

Suitability

Drawn

Halcrow Hyder Joint Venture

Mouchel

HEALTH AND SAFETY INFORMATION

CONSTRUCTIONMAINTENANCE /

OPERATION /

DECOMMISSIONING /

DEMOLITION

.

NO EXCEPTIONAL RISKS

RELATING TO THE WORKS SHOWN

ON THIS DRAWING HAVE BEEN

IDENTIFIED DURING THE DESIGN.





GU21 6QXSurreyWokingCawsey WayExport House

W6 7EFLondon43 Brook GreenElms House

+44 (0) 1246 209229+44 (0) 1246 209221Derbyshire. S41 7SLBasil Close, ChesterfieldRoyal Court

B1 1RNBirmingham199 Wharfside StreetThe CubeMajor Projects

BEDFORD1:10000

JCUGP/LN

--47067615

KEY AND INDEX OF DRAWINGS

JUNCTIONS

SURFACE WATER COLLECTION

PROPOSED DRAINAGE J12 - J8/9

SMART MOTORWAY

M4 JUNCTIONS 3 TO 12

537806-MUH-VR-S3-DR-DR-500150-1D

KEY: NOTES

EXISTING DRAINAGE IS TO BE READ IN CONJUNCTION WITH SPECIFICATION APPENDICES AND ALL SCHEME DRAWINGS.

FOR DETAILS OF THE EXISTING DRAINAGE REFER TO DRAWING NOS. 537806-MUH-00-S3-DR-DR-500000-0D TO 537806-MUH-00-S3-DR-DR-500033-0D.

FOR DETAILS OF THE SURFACE WATER COLLECTION CENTRAL RESERVE REFER TO DRAWING NOS. 537806-MUH-CR-S3-DR-DR-500000-0D TO 537806-MUH-CR-S3-DR-DR-500033-0D.

FOR DETAILS OF THE SURFACE WATER COLLECTION VERGES - 537806-MUH-VR-S3-DR-DR-500000-0D TO 537806-MUH-VR-S3-DR-DR-500033-0D.

DRAWING NUMBER DRAWING TITLE CHAINAGE537806-MUH-VR-S3-DR-DR-500000-0D PROPOSED DRAINAGE KEY AND INDEX SHEET -

537806-MUH-VR-S3-DR-DR-500151-0D PROPOSED DRAINAGE SHEET 1 OF 6 62599 - 61589






This map is reproduced from Ordnance Survey material with permission of Ordnance Survey onbehalf of the Controller of Her Majesty's Stationery Office © Crown Copyright.Unauthorized reproduction infringes Crown Copyright and may lead to prosecution or civilproceedings. Highways Agency 100018928 2015

FILTER DRAIN

CARRIER DRAIN

CATCHPIT

PIPE DIAMETER

GHOST NODE (LOCATIONAND INVERT LEVELS UNKNOWN)

PHANTOM NODE (LOCATIONAND INVERT LEVELS UNKNOWN)

PIPE DIAMETER

MANHOLE

GULLY

OUTLET

GRIP INLET

PIPEWORK

COUNTERFORT DRAIN

DITCH

CULVERT

OUTFALL

SOAKAWAY

AREA WITH NO INFORMATION AVAILABLE

EXISTING DRAINAGE

315mmx410mm OVAL IN-SITU LINEAR SLOTTED DRAIN WITHASSOCIATED FIN DRAIN/ NARROW FILTER DRAINLD

PROPOSED DRAINAGE JUNCTIONS

LDO1/LDO2/

LDO3/LDO4

KERB DRAIN UNITKDU

LINEAR DRAIN OUTLET AND TYPE

KDO KERB DRAIN OUTLET

KDA KERB DRAIN ACCESS UNIT

PIPEWORK

CATCHPIT

315mmx410mm OVAL IN-SITU LINEAR SLOTTED DRAIN WITHASSOCIATED FIN DRAIN/ NARROW FILTER DRAINLD

PROPOSED SURFACE WATER COLLECTION CENTRAL RESERVE AND VERGES

EXISTING LINEAR DRAIN TO BE RETAINEDEXLD

LDS

LDA

LINEAR DRAIN SILT TRAP

LINEAR DRAIN ACCESS UNIT

LDO

LINEAR DRAIN OUTLET

1D Amended job title and drawing title

KG 02/03/15 BJ 02/03/15 BW 02/03/15

6160

0.000

6170

0.000

6180

0.000

6190

0.000

6200

0.000

6210

0.000

6220

0.000

6230

0.0006240

0.00062

500.0

00

6260

0.000

CP62433C

CP62357C

CP62293CCP62160C CP62071C

CP61979C

CP61887C

CP61797C

CP61736C

CP61674CCP61613C

225

225

225

225225 300

225

150

150

150

150

225225 225

CP62070E

CP62072W

CP62103E

CP62103C

CP62103W

225

150

225

150

150

225

300

600

CP61979E

CP61979W

225

150

CP61887E

CP61887W

225CP61822E

CP61868WE

150

225

CP61905WE

CP61992WE

CP62051WE

225

225

150

225

150

150

225

*

225

225

CP62106WE

225

225

CP62160E 225

CP62120C

CP62120E225

CP62223C

CP62223E

225

225

225

225

225

225

225

750*

750 750

750

CP61888EOCP61808EO

CP61979EO 150150

225

225

CP62067EO

CP62170EO

CP61709EO

CP61778EO

225

225

225225

225

225150

CP62240C

CP62240W150CP62293W

150

CP62240ECP62293E

225225

*

225

225

600

CP62292WOCP62247WO

CP62228WO

CP62207WO

150

*

150

225

150

CP62348C

CP62357W150 CP62365W

CP62339ECP62348E225

CP62433W

CP62433E

225

150

CP62408WO

225 CP62366WO

CP62405EE CP62365EE150150

CP62455EE

150

150

225

300

225

225

*

LD

A

LD

LD

LD

LD

LD

L

D

L

D

LD

L

D

L

D

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

PROPOSED KERB DRAINAGE UNITS.

K

D

U

K

D

U

K

D

U


EXISTING DRAINAGE

TO BE MAINTAINED

EXISTING DRAINAGETO BE MAINTAINED

LIMIT OF DRAINAGEASSESSMENT


1.002KDO61845WEKDA61815WE

KDA61786WEKDA61755WE

1.0011.000

1.003

1.000

KD

U

KD

U

KD

U

KD

U

K

D

U

1.0012.000

2.0012.002

KDA61837EOKDO61862EO

KDA61808EO KDO61778EO KDA61747EOKDA61709EO

1.002 (GULLY CONNECTING

KDO TO CHAMBER)2.003 (GULLY CONNECTINGKDO TO PIPE)

OU61845WE

CP61778EO

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Drawing Number

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Scale at A1


Attached Xrefs : | X-M4-01 Rev 0.2 | 537806-MUH-00-S3-M2-GD-500000-0 Centreline | 537806-MUH-00-S3-M2-DR-500001-0 | 537806-MUH-VR-S3-M2-DR-500003-0 | X-M4-03 Rev 0.3 | X-M4-09 Rev 0.3 | 537806-MUH-VR-S3-M2-DR-500001-0 DrainageVerges | 537806-MUH-CR-S3-M2-DR-500001-0 Drainage CR | 537806-MUH-VR-S3-M2-RR-500001-0 Road Restraint VR DRAFT


Highways Agency

Suitability

Drawn


Mouchel



OPERATION /

DECOMMISSIONING /

DEMOLITION

.













BEDFORD1:1250

JCULN

--47067615

JUNCTION 12

SHEET 1 OF 6

JUNCTIONS



SMART MOTORWAY


537806-MUH-VR-S3-DR-DR-500151-1D


1. FOR KEY AND GENERAL NOTES REFER TO DRAWING537806-MUH-VR-S3-DR-DR-500000.

NOTES

PROPOSED DRAINAGE- WESTBOUND OFF-SLIP- Kerb Drainage Units

GENERAL NOTES: 1) Cover levels for verge chambers have been interpolated from highway design levels. 2) The pipe lengths are taken from the middle of each manhole/chamber for modelling purposes.3) Outfall design levels should be verified on site.4)

Attenuation is provided within kerb drainage units and discharge controlled by orifice plate (see notes)

Chamber/ OU

Ref

Cover

Level

(mAOD)

Depth to

Invert

(m)

Depth to

Soffit (m)

Chamber

Diam (mm)

Pipes Out Pipes in

Notes

Pipe Ref

Invert Level

(mAOD)

Length

(m) Diam (mm) Pipe Material

Carrier/

Filter

Pipe Ref

Invert

Level

(mAOD) Diam (mm)

KDA61755WE 49.300 0.355 See Note 1.000 48.945 31.000 See Note See Note C

295 Beany Block base with beany access cover and frame.

KDA61786WE 49.000 0.355 See Note 1.001 48.645 30.000 See Note See Note C 1.000 48.645 See Note


KDA61815WE 48.600 0.355 See Note 1.002 48.245 30.000 See Note See Note C 1.001 48.245 See Note


KDO61845WE 48.400 0.700 0.550 500 1.003 47.700 16.000 150 Plastic C 1.002 48.045 See Note

295 Beany Block base over 2 Piece MarshallsTrapped Gully Oufall Unit.

125mm orifice plate fitted upstream of the outgoing pipe or beany block

base outlet hole modified to 125mm diameter size.

OU61845WE 44.300 0.300 OUTFALL C 1.003 44.000 150

Gully outfalls into a ditch

PROPOSED DRAINAGE- EASTBOUND ON-SLIP- Kerb Drainage Units

GENERAL NOTES: 1) Cover levels for verge chambers have been interpolated from highway design levels. 2) The pipe lengths are taken from the middle of each manhole/chamber for modelling purposes.3) Outfall design levels should be verified on site.4)

Attenuation is provided within kerb drainage units (Beany Blocks) and discharge controlled by orifice plate (see notes)

Chamber/ OU

Ref

Cover

Level

(mAOD)

Depth to

Invert (m)

Depth to

Soffit (m)

Chamber

Diam (mm)

Pipes Out Pipes in

Notes

Pipe Ref

Invert Level

(mAOD)

Length

(m) Diam (mm)

Pipe

Material

Carrier/

Filter

Pipe Ref

Invert

Level

(mAOD) Diam (mm)

KDA61709EO 49.500 0.355 See Note 1.000 49.145 38.220 See Note See Note C


KDA61747EO 48.900 0.355 See Note 1.001 48.545 31.670 See Note See Note C 1.000 48.545 See Note


KDO61778EO 48.500 0.700 0.475 500 1.002 47.800 1.500 225 Plastic C 1.001 48.145 See Note




CP61778EO 48.500 0.715 1050 OUTFALL C 1.002 47.785 225

Gully outfalls into an existing manhole.

KDO61778EO 48.500 0.355 See Note 2.000 48.145 29.560 See Note See Note C






KDO61862EO 47.600 0.700 0.550 500 2.003 46.900 2.500 150 Plastic C 2.002 47.192 See Note




Existing pipe

47.600 0.725 OUTFALL 2.003 46.875 150

Gully outfalls into a pipe

1D Amended drawing title and job title

KG 02/03/15

5880

0.000

5890

0.000

5900

0.000

5910

0.000

5920

0.000

5930

0.000

5940

0.000

5950

0.000

5960

0.00059

700.0

00

CP59673C

CP59591CCP59499C

CP59408CCP59314C CP59222C CP59130C

CP59038CCP58945C

CP58852C

CP58759C150

150

150

150150 150 150

150150

150

150

15015

0

150

*150

150

150

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD



EXISTING DRAINAGE

TO BE MAINTAINED


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Highways Agency

Suitability

Drawn


Mouchel



OPERATION /

DECOMMISSIONING /

DEMOLITION

.













BEDFORD1:1250

JCULN

--47067615

READING MSA JUNCTION

SHEET 2 OF 6

JUNCTIONS



SMART MOTORWAY


537806-MUH-VR-S3-DR-DR-500152-1D



NOTES


KG 02/03/15

5430

0.000

5440

0.000

5450

0.000

5460

0.000

5470

0.000

5480

0.000

5490

0.000

5500

0.00055

100.0

00

5520

0.000

5530

0.000

CP55334C

CP55274C

CP55183CCP55172C

CP55122C

CP55031C

CP54937C CP54909C

225

225

300

300

225

225

225 150300

225

225

300

225

150

300

300

300

150

300

300

300

150

300

150

150

225

225

*

*

*

*

*

225

*

150150150*

*

150

150

150

150

150

150

150

CP54937E

CP55031W

CP54937W

CP55031E

225

225

150

150

225225

150

150

150*

225CP54909E

150

150150

**

*

*

*

150

150

225

*

300

225

CP55122E

CP55122W300

300CP55172E

CP55172W

*

*

*

300

300

CP55178EO

* 150 **

*

*

1350

825

*

*

**

*

*

*

*

* *

*

CP55220C 300

*

*CP55186EO

CP55256EO

CP55321E

150

**

*

*

150

150

150

150

CP55172EOCP55133EO CP55100EO CP55049EO

CP55012EO

CP54983EO

LD

LD

LD

LD

LD

LD

LD

LD

LD

L

D

L

D

L

D

L

D

L

D

L

D

L

D

L

D

L

D

LD

LD

LD

LD

LD LD

LD

LD

LD

LD

LD

LD

L

D

L

D

L

D

L

D

L

D

L

D

L

D

L

D

L

D

LD

L

D

L

D

L

D

L

D

LD

LD

L

D

L

D

LD

LD

LD LD

PROPOSED KERB DRAINAGE UNITS.EXISTING DRAINAGETO BE MAINTAINED


EXISTING DRAINAGE

TO BE MAINTAINED



K

D

U

K

D

U

K

D

U

KDA55181EE

1.001

1.002

KDO CONNECTS WITH EXISTINGCOMBINED KERB DRAINAGE UNITS

KDA54501WE

K

D

U

KDO54555WE

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Scale at A1




Highways Agency

Suitability

Drawn


Mouchel



OPERATION /

DECOMMISSIONING /

DEMOLITION

.













BEDFORD1:1250

JCUGP

--47067615

JUNCTION 11

SHEET 3 OF 6

JUNCTIONS



SMART MOTORWAY


537806-MUH-VR-S3-DR-DR-500153-1D



NOTES

PROPOSED DRAINAGE- WESTBOUND OFF-SLIP- Kerb Drainage Units

GENERAL NOTES: 1) Cover levels for verge chambers have been interpolated from highway design levels. 2) The pipe lengths are taken from the middle of each manhole/chamber for modelling purposes.3) Outfall design levels should be verified on site.4) Attenuation is provided within kerb drainage

units and discharge controlled by orifice plate (see notes)

Chamber/ OU

Ref

Cover

Level

(mAOD)

Depth to

Invert

(m)

Depth to

Soffit (m)

Chamber

Diam (mm)

Pipes Out Pipes in

Notes

Pipe Ref

Invert Level

(mAOD) Length (m) Diam (mm)

Pipe

Material

Carrier/

Filter

Pipe Ref

Invert Level

(mAOD) Diam (mm)

KDA54501WE 43.430 0.425 See Note 1.000 43.005 53.60 See Note See Note C


KDO54555WE 43.400 0.826 See Note 1.001 42.574 5.00 150 Plastic C 1.000 42.975 See Note


100mm orifice plate fitted upstream of the outgoing pipe or beany block base outlet hole modified to 100mm

diameter size.

CP54559WE 43.400 0.876 See Note OUTFALL 1.001 42.524 150

Gully oufalls to existing manhole chamber

PROPOSED DRAINAGE- EASTBOUND OFF-SLIP- Kerb Drainage Units

GENERAL NOTES: 1) Cover levels for verge chambers have been interpolated from highway design levels. 2) The pipe lengths are taken from the middle of each manhole/chamber for modelling purposes.3) Outfall design levels should be verified on site.4) Attenuation is provided within kerb drainage

units and discharge controlled by orifice plate (see notes)

Chamber/ OU

Ref

Cover

Level

(mAOD)

Depth to

Invert (m)

Depth to

Soffit (m)

Chamber

Diam (mm)

Pipes Out Pipes in

Notes

Pipe Ref

Invert Level

(mAOD) Length (m) Diam (mm)

Pipe

Material

Carrier/

Filter

Pipe Ref

Invert Level

(mAOD) Diam (mm)

KDA55181EE 41.100 0.355 See Note 1.000 40.745 70.00 See Note See Note C


KDA55249EE 40.800 0.425 See Note 1.001 40.375 55.80 See Note See Note C 1.000 40.445 See Note


KDO55305EE 40.800 0.426 See Note 1.002 40.375 14.30 See Note See Note C 1.001 40.374 See Note

365 Beany Block base with beany access cover and frame connects with existing beany base. Size and invert

levels of existing beany to be determined on-site..

CP55321E 40.800 0.425 OUTFALL C 1.002 40.375 See Note

Exsiting beany outfalls into existing manhole.


KG 02/03/15

4600

0.000

4610

0.000

4620

0.000

4630

0.000

4640

0.000

4650

0.000

4660

0.000

4670

0.000

4680

0.00046

900.0

00

450

300

300

225

300

225

300

300

225

225

225

225

150

225

375

375 150

300

300

300

225

375300225

150

300

300300

225225

225225

225*225

225225

225

225

225

225

150

150

150

225

150

150

225

150

225

150

300300

150

300

CP46343EO CP46343EO

*

*

*

*

*

*

*

CP46460EE

CP46

409E

E

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

L

D

L

D

L

D

LD

LD

LD

LD

LD

LD

LD

LD

LD

LDLD LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LDLD

LD

LD

LD

LD

LD

LD

LD LDLD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

L

D

LD

LD

LD

LD

LD

LD


EXISTING DRAINAGE

TO BE MAINTAINED

EXIS

TING

DRAI

NAGE

TO B

E MA

INTA

INED

PROPOSED SLOT DRAIN


EXISTING DRAINAGE

TO BE MAINTAINED

EXISTING DRAINAGE

TO BE MAINTAINED

EXISTING DRAINAGE

TO BE MAINTAINED

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Drawing Number

DateOriginated


Scale at A1




Highways Agency

Suitability

Drawn


Mouchel



OPERATION /

DECOMMISSIONING /

DEMOLITION

.













BEDFORD1:1250

JCULN

--47067615

JUNCTION 10

SHEET 4 OF 6

JUNCTIONS



SMART MOTORWAY


537806-MUH-VR-S3-DR-DR-500154-1D



NOTES

PROPOSED DRAINAGE- EASTBOUND OFF-SLIP- Slot drain

Surface Water Collection System Outlet Details (LDO) Access / Silt Trap Units

Gradient [%]

Drainage Unit Size / Diameter

Type Start Chainage [m] Finish Chainage [m] Length [m]

Location Reference

LDO Type Type (Pipe Out) Reference / Type

Location

(Chainage) [m]

Width [mm] Depth [mm] Pipe Diameter [mm]

Slotted Linear Drainage Channel

46776 46724 52

Eastbound Verge

LDO46724WV

LDO Type 3

Connection into an existing gully at

CH 46724

1.86 - - 315 x 410 Oval


KG 02/03/15

EXISTING DRAINAGE

TO BE MAINTAINED

EXISTING DRAINAGE

TO BE MAINTAINED

EXISTING DRAINAGE

TO BE MAINTAINED

EXISTING DRAINAGE

TO BE MAINTAINED

EXISTING DRAINAGE

TO BE MAINTAINED

EXISTING DRAINAGE

TO BE MAINTAINED

4510

0.00045

200.0

004530

0.000

4540

0.000

4550

0.000

4560

0.000

4570

0.000

4580

0.000

4590

0.000

150

300

300

150225

225

225

225300300

375

375

375

600

300525450

300

450

600

600

375

375

375

525

300

*

225

150

300

300

300

225

300

300

* 300225

150

225

600

225

225

150150 150 150

300

CP45508WE

225

150

*

300

150

150

150

150

150

225

CP45575WE

*

150

*

**

*

*

*

*

*

*

*

*

*

150

CP45667WECP45675WE

CP45747WECP45758WE

CP45686WE

CP45779WE

CP45701WE

CP45711WE

CP45

899W

O

CP45

889W

O

CP45

835W

O

CP45

847W

O

CP45398W

CP45320W

CP45268W

CP45211W CP45134W

CP45126W

L

D

LD

LD

LD

LD

LD

LD

LD

LD

LD

LDLD

LD LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

L

D

L

D

LD

S

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

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Drawing Number

DateOriginated


Scale at A1




Highways Agency

Suitability

Drawn


Mouchel



OPERATION /

DECOMMISSIONING /

DEMOLITION

.













BEDFORD1:1250

JCULN

--47067615

JUNCTION 9

SHEET 5 OF 6

JUNCTIONS



SMART MOTORWAY


537806-MUH-VR-S3-DR-DR-500155-1D



NOTES

1D Amended drawing titles and job titles

KG 02/03/15

3390

0.000

3400

0.000

3410

0.00034

200.0

00

3430

0.000

3440

0.000

3450

0.000

3460

0.000

3470

0.000

3480

0.000

CP34626CCP34586C

CP33824C

CP34491C CP34401C CP34309C

CP34217CCP34158C

CP34097C

CP34005C

CP34050C

CP34219E

300

300

450

150150

450

CP33824E

*

*

*

*

*

***

*

*

*

300

CP33795W

CP33914W

CP34008W

CP34153W

CP34098W

CP34160W

CP34222W

CP34312WCP34403W

450

450

450

450

450

450

450300

CP34310E

150

150

300

225

300

225

CP34491W

CP34586W

CP34677W

150

300

CP34200E

**CP34400E

*

150

150

225

225

CP34019E

CP33946E

CP33915E

CP33854E

CP34766C

225225

150

375375

CP33823WCP33823WE

150

150

150

*

225300

150

CP34404WO

225 CP34268EECP34328EECP34417EE

225

150

150

150

150

150150

150150

150150

150

150

225 300

CP33824EO

CP33812EO

375

CP33918C

CP34337WO

LD

LD

LD

LD

LD

LD

LD

LD

LD

LD

L

D

A

L

D

L

D

L

D

L

D

L

D

L

D

L

D

L

D

L

D

L

D

L

D

L

D




ATTENUATION MEASURE REQUIREMENTS


CP34428W

1.000

1.0021.003

1.0041.005

2.000

3.000

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Scale at A1




Highways Agency

Suitability

Drawn


Mouchel



OPERATION /

DECOMMISSIONING /

DEMOLITION

.













BEDFORD1:1250

JCUGP

--47067615

JUNCTION 8

SHEET 6 OF 6

JUNCTIONS



SMART MOTORWAY

M4 JUNCTION 3 TO 12

537806-MUH-VR-S3-DR-DR-500156-1D



NOTES

PROPOSED DRAINAGE- WESTBOUND OFF-SLIP

GENERAL NOTES: 1) Cover levels for verge chambers have been interpolated from highway design levels. 2) Pipe lengths are taken from the middle of each manhole/chamber for modelling purposes.3) Outfall design levels should be verified on site. 4) Invert levels, cover levels, diameter and lengths of the existing pipe

network were taken from HADDMS drawings dated 1972. 5) In absence of HADDAMS cover levels, levels from topographical survey from September 2012 were used. 6) Existing chamber diameters information is not available. The chamber diameters were therefore assumed. 7) Existing invert levels may need to be amended

for pipes 1.001 to 1.004.

Chamber Ref

Cover Level

(mAOD)

Depth to

Invert (m)

Depth to

Soffit (m)

Chamber

Diam (mm)

Pipes Out Pipes in

Notes

Pipe Ref

Invert Level

(mAOD) Length (m) Diam (mm) Pipe Material

Carrier/

Filter

Pipe Ref

Invert Level

(mAOD) Diam (mm)

Unnamed 26.70 0.91 0.68 1050 1.000 25.795 11.3 225 VC F

Existing MH position estimated. To be mainatined.

CP34677W 26.70 1.01 0.71 1050 1.001 25.690 89.3 300 VC F 1.000 25.757 225

Existing MH and downstream pipe. To be mainatined.

CP34586W 26.40 0.98 0.68 1050 1.002 25.419 91.5 300 VC F 1.001 25.419 300


CP34491W 26.07 0.95 0.50 1050 1.003 25.125 86.8 450 VC F 1.002 25.142 300

New DS pipe to provide attenuation.

CP34337WO 28.70 1.00 0.78 1200 2.000 27.700 67.5 225 VC F

Existing USMH moved from proposed running lane towards soft ground.

CP34404WO 26.10 1.32 1.02 1050 1.004 24.784 12.3 300 CO C 1.003 24.784 450


2.000 25.150 225

CP34428W 26.13 1.00 0.85 1050 3.000 25.130 23.5 150 VC F

Proposed 150mm diameter filter drain to tie into an existing MH, original MH moved from running lane towards

soft ground.

CP34403W 26.06 1.33 1.03 1200 1.005 24.730 89.2 300 CO C 1.004 24.750 300

265mm orifice plate to be fitted into existing manhole to provide flow control. Final flow control size subject to

US pipe levels to be determined during a detailed drainage survey.

3.000 24.750 150

CP34312W 25.99 1.49 1.49 1200 OUTFALL CO F 1.005 24.500 300

Existing MH to be mainatined.

1D Amended drawing and job title

KG 02/03/15

m4 junctions 3 to 12 smart motorway drainage strategy report · m4 junctions 3 to 12 smart motorway...

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