Sewerage Design and drawing Checklist

VeRsion 2.0

Design Submission

Project name
Contract number
Index number
Design consultant
Designer
Design Reviewer/Checker
Designer’s report (attached or reference)
Related project contract numbers
Design review checklist completed (yes/no)
Design complies with HWC design standards (yes/no) (if no obtain dispensation prior to design submission and list dispensation in table)
Drawing(s) complies with requirements (yes/no)
Drawing CAD files passed CAD standards check file, refer to STS911(Yes/No)
Relevant permits Obtained (eg Permit to Enter, Road Opening, Other Agencies, etc). List.

Dispensation

Item / HWC reference

Design review Checklist

Once the design has been completed, the Designer shall undertake a system review to ensure the design complies with the requirements specified by the Water Agency in the Concept Plan and the requirements detailed in this Code. Compliance shall cover at least the following (additional items can be added when required):

Item (WSA02 – Part 1 Clause 9.1) / Checked (Y/NA) / Designer’s/Reviewers Notes
(a)Size(s) and grades of sewers throughout therelevant portion of the proposedtransfer/reticulation system meet Concept Plan requirements
(b)Pipe materials are suitable for the particular application and environment
(c)Sewer layout and alignment meets Water Agency requirements
(d)Route selection meets Concept Plan requirements
(e)Topographical and environmental aspects have been addressed
(f)Easements as appropriate are specified
(g)Foundation and geotechnical aspects have been considered
(h)Provision is made for future extensions, as appropriate
(i)Types and locations of maintenance structures, overflows and vents meet Water Agency requirements
(j)Locations and details of bulkheads are specified
(k)Property service connection locations meet Water Agency requirements
(l)The system components and configuration meet the Water Agency’s occupational health and safety requirements
(m)Life cycle costs are minimised
(n)Environmental requirements identified in the REF or EIA
(o)Design Drawings comply with Clause 9.2 and include items listed in Clauses 9.2.1 to 9.2.7

Design Drawings

In preparing Design Drawings, Designers shall comply with requirements set out in the following table, which includes requirements listed under Clause 9.2 of WSA02 Part 1 and in Appendix HW 3A – Drawing Requirements.

Included (Y/N/NA) / Notes
General
A locality plan giving the overall layout and location of the works
A detailed plan of the scheme
Detailed notes to facilitate construction
Special details where the Standard Drawings are not sufficient
Longitudinal sections
A flow schedule
Schedule of landowners
Benchmark or reference level mark
Scale
North point
Contract Number
Index Number
Name of Developer
Name of Project Manager
Name of Designer or agent
Title block information (refer STS911)
Construction
Name of Constructor
Plan to be marked “Work As Constructed” on the top right corner in 5mm text
Date of completion of construction
Date of drawing up of WAC documents
Amended positions and/or depths of sewers
If sewer is amended in position and/or depth, redefined drainage limits on WAC drawings
Revised status of facilities e.g. “Existing end to be extended” edited to “Existing end extended” in WAC documentation
Property information
Layout of roads, easements and lots
Lot numbering and street names
Municipal boundaries
Sewers
Pipe schedule showing size, material, type, class, length and joint type of all pipes to be laid and abandoned
Section of existing sewermain downstream to closest existing MH or MS
Position of sewers relative to property boundaries
Locations and details of known utility services and stormwater drains
Insets and diagrams (amended where necessary on WAC drawings)
Notations and standard labels indicating current status e.g. “Existing end to be extended” (to be edited to “Existing end extended” in WAC documentation)
Ties to structures and downstream distances
Where sewers can only be tied to local features i.e. trees, posts, etc, bearing and distances of sewers with azimuth of survey
Directions for connecting to existing system
A note specifying that non-detectable tape, raised to the surface, is to be laid above junctions
Design assumptions for ancillary structures
Line numbers
Flow arrows
Final design contours (not required on construction issue)
Point of connection and connection type for each lot (eg branch, junctions, riser etc) or junction distances to downstream MH
Unsurveyed property connection sewers shown with downstream distance and length e.g. 12.5 PCS 2.0, with distance shown first in all cases
Drainage limits—full or partial
Slope arrows on each lot
Lot connection invert levels
Existing junctions within new lots
Structures
MH/MS numbers
Measured and HW levels on existing sewer
Position of structures relative to property boundaries
Survey level control points
Ties and/or downstream distance
Type of structure
Details of all inlets and property connection sewers
Water seal requirements
Ties to additional structures
MGA co-ordinates (GDA94)
Vent shafts showing size, type and height
For MHs and chambers, structural details including section thicknesses, reinforcement and cover
Longitudinal sections (profiles)
Size and class (stiffness, SDR and/or pressure) of sewer to be laid
Material designation of sewer to be laid (Refer to list of acronyms on WSAA website)
Chainages of structures and other on line and nearby features
Locations and details of known utility services and stormwater drains (additional services located during construction to be shown on WAC drawings)
Grades (percentage) and levels of sewers (including depths to invert and surface levels)
Thrust bores and critical grade sewers. Surveyed RL of and clearance from other pipes and services to be shown
Special features of structures e.g. fibreglass MH with solid-top, bolt-down DI ClassB watertight cover, vertical concrete encased with lamphole type cover etc
Design type of structures e.g. MH, segmental MH, etc
Types of joints and extent of each type (Refer to list of acronyms on WSAA website)
Concrete surrounds or concrete bulkheads with relevant chainages
Protective coatings or other protective measures with relevant chainages
Piling—size, type and extent
Types of pipe support used—chainage noted
Method and type of construction if boring to be undertaken
Strata
Intersection and tangent point details and invert levels for setting out any curves
Trench support system left in ground—chainages noted
Ground water levels encountered
Where totally sand-filled trench—chainages noted
Line numbers (check plan) and notation of junctioning line numbers
MH/MS numbers (check plan)
Drop structures
Direction and IL of inlets constructed for future connection
Tenure
Bedding type
Datum RL
Surface level, finished surface level and kerb level where applicable
Construction notes where applicable
Other
Major features e.g. creeks, railway lines, power transmission lines
Geotechnical data, special foundation conditions, dewatering requirements
Groundwater levels
Locations and details of known and suspected sites with contaminated soil and acid sulphate or potential acid sulphate soil (additional sites located during construction to be shown on WAC drawings)

Sewerage Design And Drawing Checklist

Version 2.0 October 2010