220 1a storm water drainage general

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Specification No. 220 DRAINAGE

The AUS-SPEC Joint Venture date: Apr 2000 Copying strictly prohibited

AUS-SPEC-2\NSW-220 Apr 2000 LIVERPOOLCITYCOUNCIL

NEW SOUTH WALES

SPECIFICATION

220

STORMWATER DRAINAGEGENERAL


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SPECIFICATION 220 - STORMWATER DRAINAGE - GENERAL

NOTICE

This document is a copy of one of Liverpool City Councils Infrastructure Specifications.

The Infrastructure Specifications have been developed by Council for use with civil works contracts let byCouncil, or for use on subdivision works to be handed over to Council.

Council only uses the Infrastructure Specifications in conjunction with its other standard form documentsand under the supervision of professional civil engineers who are trained and experienced in civil worksdelivery and construction. Liverpool City Council does not use these Specifications for any other purposeand does not consider them suitable for use for any other purpose.

If you use this document for any purpose which is not consistent with the above (including, without

limitation, for carrying out any construction, engineering, maintenance or other work) you do so at yourown risk.

Bound paper copies of Councils Specifications may be purchased on payment of the price published inCouncils list of Fees and Charges.

Electronic copies of LCC Specifications in editable format, generally will not be provided.

Electronic scanning, copying or decoding of Liverpool City Councils Specifications, is strictly prohibited.

This document is current at the date of this notice however, you should be aware that Liverpool CityCouncil regularly reviews and updates its Specifications. You will not be notified of any update.

Your comments and suggestions to improve any of Liverpool City Councils Specifications may be sentto:

The Manager City Assets Liverpool City CouncilLocked Bag 7064, LIVERPOOL BC NSW 1871

No advisory or support services other than those given in conjunction with specific Council tenders orSubdivision Construction projects, will be provided by Liverpool City Council.

Copyright in this document belongs to Liverpool City Council.


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Amendment Record for this Specification Part

This Specification is Councils edition of the AUS-SPEC generic specification part and includes Councilsprimary amendments.

Details are provided below outlining the clauses amended from the Council edition of this AUS-SPECSpecification Part. The clause numbering and context of each clause are preserved. New clauses are addedtowards the rear of the specification part as special requirements clauses. Project specific additional script isshown in the specification as italic font.

The amendment code indicated below is A for additional script M for modification to script and O foromission of script. An additional code P is included when the amendment is project specific.

AmendmentSequence No.

Key Topic addressed inamendment

Clause No. AmendmentCode

AuthorInitials

AmendmentDate

1.EXTENT OF WORKClause RESERVED

220.03 O AB 17.01.03

2.Drainage Structure in lieu ofCulvert(s)

220.06 M AB 17.01.03

3.Additional text subsequentprotection and support

220.07.3 A AB 17.01.03

4. Sub clause reservation 220.07.4 O AB 17.01.03

5.

Item 1 Excavation by

Blasting RESERVED 220.14.1 O AB 17.01.03

6. MEASUREMENT ANDPAYMENTClause RESERVED

220.15 O AB 25.04.04

7.

8.

9.


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SPECIFICATION 220 - STORMWATER DRAINAGE - GENERAL

CLAUSE CONTENTS PAGE

GENERAL.............................................................................................................................1

220.01 INTRODUCTION...............................................................................................................................1

220.02 SCOPE..............................................................................................................................................1

220.03 EXTENT OF WORK..........................................................................................................................1

220.04 REFERENCE DOCUMENTS............................................................................................................1

CONSTRUCTION..................................................................................................................2

220.05 TEMPORARY DRAINAGE DURING CONSTRUCTION..................................................................2

220.06 SITING OF DRAINAGE STRUCTURES...........................................................................................2

220.07 EXCAVATION...................................................................................................................................2

220.08 BACKFILLING...................................................................................................................................3

220.09 COMPACTION..................................................................................................................................3

220.10 CONCRETE WORK..........................................................................................................................4

220.11 SPRAYED CONCRETE....................................................................................................................4

SPECIAL REQUIREMENTS .................................................................................................4

220.12 RESERVED .....................................................................................................................................4

220.13 RESERVED .....................................................................................................................................4

LIMITS AND TOLERANCES ................................................................................................4

220.14 SUMMARY OF LIMITS AND TOLERANCES...................................................................................4

MEASUREMENT AND PAYMENT .......................................................................................6

220.15 RESERVED ......................................................................................................................................6


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AUS-SPEC-2\NSW-220 Apr 2000 220-1 LIVERPOOLCITYCOUNCIL

SPECIFICATION 220 : STORMWATER DRAINAGE - GENERAL

GENERAL

220.01 INTRODUCTION

1. Drainage works shall form a complete system carrying water through and awayfrom the Works.

Purpose

2. This is the general Specification common and applicable to all types of drainagelines, open drains, kerb and gutter (channel), and drainage structures and shall be readin conjunction with drainage Specifications:

221 Pipe Drainage222 Precast Box Culverts223 Drainage Structures

224 Open Drains, including Kerb and Gutter (Channel)

as applicable to particular Contracts.

220.02 SCOPE

1. The work to be executed under this Specification consists of:

(a) preparation for stormwater drainage construction,

(b) temporary drainage during construction,

(c) siting of pipes, pipe arches and box culverts,(d) all activities and quality requirements associated with excavation and

backfilling,

(e) all concrete work associated with stormwater drainage,

(f) demolition and removal of existing redundant pipes and drainagestructures.

2. Requirements for quality control and testing, including maximum lot sizes andminimum test frequencies, are cited in the Specification Part for Quality Requirements.

Quality

220.03 EXTENT OF WORK

RESERVED

220.04 REFERENCE DOCUMENTS

1. Documents referenced in this Specification are listed in full below whilst beingcited in the text in the abbreviated form or code indicated.

DocumentsStandardsTest Methods

(a) Council Specifications

211 - Control of Erosion and Sedimentation

213 - Earthworks271 - Minor Concrete Works


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The AUS-SPEC Joint Venture date: Mar 2000 Copying strictly prohibited

220-2 AUS-SPEC-2\NSW-220 Apr 2000LIVERPOOLCITYCOUNCIL

(b) Australian Standards

AS 1289.5.4.1 - Compaction control test - Dry density ratio, moisturevariation and moisture ratio.

AS 1289.5.7.1 - Compaction control test (Rapid Method)

CONSTRUCTION

220.05 TEMPORARY DRAINAGE DURING CONSTRUCTION

1. All drainage works carried out by the Contractor shall comply with theSpecification for CONTROL OF EROSION AND SEDIMENTATION.

Control

2. The Contractor shall make adequate provision for runoff flows at drainage worksunder construction to avoid damage or nuisance due to scour, sedimentation, soilerosion, flooding, diversion of flow, damming, undermining, seepage, slumping or otheradverse effects to the Works or surrounding areas and structures as a result of the

Contractor's activities.

Contractor'sResponsibility

3. The Contractor shall not implement any proposals to dam up or divert existingwatercourses (either temporarily or permanently) without the prior approval of theSuperintendent.

Limitations

4. The Contractor's material and equipment shall be located clear of watercoursesor secured so that they will not cause danger or damage in the event of large runoffflows.

Location ofEquipment

220.06 SITING OF DRAINAGE STRUCTURES

1. Before commencing construction of any drainage structure, the Contractor shallset out on site the drainage structure inlet and outlet positions to the location and levelsshown on the Drawings, and shall present this set-out for inspection by theSuperintendent. This action constitutes a HOLD POINT. The Superintendents approvalto the set-out is required prior to the release of the hold point.

Set-out

HP

2. The Superintendent may amend the inlet or outlet locations or designed levels orthe drainage structure length to suit actual site conditions. Any activity resulting fromsuch amendments by the Superintendent shall be deemed to be included as part of thework covered by the Schedule of Rates or Bill of Quantities as appropriate. Should theSuperintendent require a change to the culvert strength or the conditions of installationan appropriate variation shall be ordered.

Amendmentsto plannedwork

3. Should the Contractor propose changes to the drainage structure location,length, designed levels, drainage structure strength, conditions of installation or cover tosuit the construction procedures, the Contractor shall present the proposed drainagestructure set-out in addition to the designed set-out for consideration by theSuperintendent. No changes shall be made unless the prior written approval of theSuperintendent is obtained. All costs associated with such changes shall be borne bythe Contractor.

ProposedChanges byContractor

ContractorsCost

220.07 EXCAVATION

1. Before undertaking stormwater drainage excavation, topsoil shall be removed inaccordance with the Specification for EARTHWORKS.

Topsoil

2. In undertaking trench excavation the Contractor shall provide any shoring, sheet Safety


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within 1.5m of finished surface 100%

Backfill material within the selected material zone 100%

Compaction requirements adjacent to pipe drainage for concrete, steel or UPVC pipesare set out in the Specification for PIPE DRAINAGE.

2. All material shall be compacted in layers not exceeding 150mm compactedthickness. Each layer shall be compacted to the relative compaction specified before thenext layer is commenced.

Layers

3. At the time of compaction, the moisture content of the material shall be adjustedso as to permit the specified compaction to be attained at a moisture content which,unless otherwise approved by the Superintendent, is neither less than 60 per cent normore than 95 per cent of the apparent optimum moisture content, as determined byAS 1289.5.7.1 (standard compaction).

MoistureContent

4. When compacting adjacent to culverts or drainage structures, the Contractorshall adopt compaction methods which will not cause damage or misalignment to any

culvert or drainage structure. Any damage caused shall be rectified, and all costs ofsuch rectification shall be borne by the Contractor.

Precautions

ContractorsCost

220.10 CONCRETE WORK

1. For all concrete work, the Contractor shall comply with the Specification forMINOR CONCRETE WORKS in relation to the supply and placement of normal classconcrete and steel reinforcement, formwork, tolerances, construction joints, curing andprotection.

Specification

220.11 SPRAYED CONCRETE

1. If sprayed concrete has been specified, shown on the Drawings or directed bythe Superintendent, it shall comply with requirements in the Specification for MINORCONCRETE WORKS.

Standard

SPECIAL REQUIREMENTS

220.12 RESERVED

220.13 RESERVED

LIMITS AND TOLERANCES

220.14 SUMMARY OF LIMITS AND TOLERANCES

1. The limits and tolerances applicable to the various clauses in this Specificationare summarised in Table 220.1 below:

Item Activity Limits/Tolerances SpecClause

1. RESERVED


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AUS-SPEC-2\NSW-220 Apr 2000 220-5 LIVERPOOLCITYCOUNCIL

Item Activity Limits/Tolerances SpecClause

2. Relative Compaction (Standard)

(a) Foundations or trench base to a depthof 150mm below foundation levels

95% 220.09

(b) Material replacing unsuitable material 95% 220.09

(c) Bedding material 95% 220.09

(d) Selected backfill and ordinary backfillmaterial:

220.09

below 1.5m of finished surface 95%

within 1.5m of finished surface 100%

(e) Backfill material within the selectedmaterial zone

100% 220.09

3. Backfill

(a) Layers 150mm 220.09

(b) Moisture Content >60%,


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MEASUREMENT AND PAYMENT

220.15 RESERVED