C O O K I S L A N D S G O V E R N M E N T
I N F O R M A T I O N
D O C U M E N T
I s s u e d o n
2 4 N O V E M B E R 2 0 1 4
F o r
Contact Entity:

1.
General Information ....................................................................................................................... 1
1.1
Introduction .......................................................................................................................... 1
1.2
Purpose ................................................................................................................................ 1
1.3
Reliance on this Document and/or any information Contained in this Document ............... 1
2.
Scope of Work ................................................................................................................................ 2
2.1
Locations and Project Drawings .......................................................................................... 2
1.1
Design and Build Works – Headworks ................................................................................ 2
1.2
Build Only Works – Operations, Roads and Pipelines ........................................................ 3
3.
Design and Build Requirements .................................................................................................... 6
1.3
Concept Design ................................................................................................................... 6
3.1
Treatment Facility Performance ........................................................................................... 7
4.
Other Information ........................................................................................................................... 9
4.1
Site Visit and Presentation ................................................................................................... 9
4.2
Tender timeline .................................................................................................................... 9
4.3
Local Contractor Involvement .............................................................................................. 9
Appendix A - Drawings
Appendix B – Watercare Water Quality Report
Appendix C – Local Contractors
Te Mato Vai | Information Pack for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation,
51/32561/00 | i

This document covers the general requirements for the construction and refurbishment of water intakes, treatment, storage and water supply (to the ring main) for the Government of the Cook
Islands, through the Ministry of Finance, Economic Management (MFEM), Te Mato Vai PMU.
The Te Mato Vai project is generally made up of the following components:
1) The design and construction of the inner and outer ring mains (construction currently being undertaken).
2) The design and construction of new water treatment facilities (currently part of this potential tender).
3) The design and construction of replacement trunk mains as required (currently part of this potential tender).
4) Upgrade of roading assets to improve all weather access to the water treatment facilities
(currently part of this potential tender).
5) The installation of domestic and commercial meters for the purposes of monitoring water consumption (as part of a future tender).
6) The design and installation of a SCADA system (as part of a future tender).
The purpose of this document is to provide some project specific design information to the industry prior to the release of the tender document in order to assist the contracting industry to prepare for the tender and understand the scope of work.
Information contained in this document is subject to change and no reliance can be placed on the scope of the tender being the same as the information contained in this document.
Also, the issue of this document does not constitute a tender, or infer that any tender will actually be released for this work at any point in the future.
Any costs incurred by any prospective contractor will be at that contractor’s risk, irrespective of whether any tender, in any form, is actually released at any point in the future.
Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00 | 1

The contract works are located across eleven (11) sites in Rarotonga, Cook Islands:
The 11 sites are:
Site
Avana
Avatiu
Matavera
Akaoa
Ngatoe
Papua
Drawing Site Location Number
01
02
03
04
05
06
Taipara
Takuvaine
Tupapa
Turangi
08
09
10
11
Totokoitu 12
Preliminary site layout drawings and P&ID’s have been provided for information purposes
For the purposes of this project, Headworks are defined as stream intakes, pre-treatment facilities, treatment facilities and, where specified, any storage identified for each of the locations. The headworks, and hence the scope of the design build, does not include the trunk main pipeline works.
2.2.1
Design Works
It is intended that the headworks will be a design and build component, with the design works incorporating the design, design report, drawings, documentation and Principal ’s approval (on a site by site basis) of all works required to be constructed for the headworks.
The activities to be completed under the design will be, but not necessarily limited to:

Production of all Design Documentation

Production of Process Documentation

Production of the Contractor Quality Plan

Approval of the design and relevant documentation by the Engineer

Other project requirements as necessary to satisfactorily complete the design of the headworks
2.2.2
Headworks Construction
It is intended that the Headworks Construction i s a ‘design and build’ component and shall incorporate all works required to complete the construction of detailed design as approved by the Engineer. It includes the following sites:
2 | Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00

Site
Intake* Water Treatment Plant
Max Flow
(m 3 /day)
N/A
Min Flow
(m 3 /day)
N/A
Storage
(m 3 )
Akaoa
N/A 1400
Avatiu
New 2000 450 4800
Avana
Upgrade 3400 1200 1400
Matavera
Upgrade 1200 325 600
Ngatoe
Upgrade 2000 250 2800
Papua
Upgrade 2000 1200 1400
Taipara
New 1200 250 N/A
Takuvaine
Upgrade 3000 675 600
Totokoitu
New 2000 400 N/A
Tupapa
Upgrade 1200 275 1400
Turangi
New 3000 1200 2800
*Note these are based on the concept design layouts and hydraulics, this can be altered depending on the design and build recommendations.
The activities to be completed under the headworks construction will be, but not necessarily limited to:

Production of the Contractors Construction Management Plan and Programme

Review and update of the Contractor Construction Management Plan and Programme

Completion of construction works to the satisfaction of the Engineer

Initial commissioning of the Headworks to the satisfaction of the Engineer

Production of As built documentation

Production of Operation and Maintenance manuals

Approval of Operation and Maintenance manuals by the Engineer
2.3.1
Headworks Operational Period
Headworks Operation Period is a ‘build only’ component and shall require the contractor to complete all works required to prove the performance of the plant installed in the headworks locations. It is likely that the contract will be required to operate the headworks components for
12 months.
The activities to be completed under this separable portion are, but not necessarily limited to:

Post commissioning of the plant to refine the production process

Supply and shipment of any coagulant required to operate the plant

Provision of water quality testing equipment for ICI(new SOE) operations staff

Water quality testing to prove the performance of the treatment process
Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00 | 3


Training of TMV staff on the operation of the plant (both formal office based training and on-site training)

Direction of TMV operation staff in the day to day operation of the water treatment plants
2.3.2
Pipelines Construction
Pipelines Construction is a ‘build only‘ component and shall incorporate supply and construction of the following pipelines . The work starts at the extent of the ‘design and build’ component works and ends at (and including) the connection to the ring main.
Site
Pipe Material Pipeline Length (m)
Akaoa
Avana
Avatiu
Matavera
Ngatoe
Papua
Taipara
Takuvaine
Totokoitu
Tupapa
Turangi
225 OD PE100 PN10
315 OD PE100 PN10
355 OD PE100 PN10
200 uPVC
200 uPVC
225 OD PE100 PN10
200 uPVC
200 uPVC
315 OD PE100 PN10
200 uPVC
315 OD PE100 PN10
180
4174
2624
Repairs Only
Repairs Only
1503
Repairs Only
Repairs Only
1695
Repairs Only
1864
The activities to be completed the pipeline construction will be, but not necessarily limited to:

Review and update of the Contractor Construction Management Plan and Programme

Supply and installation of pipeline materials

Weld testing

Pipeline Pressure testing

Flushing and cleaning of pipeline

Supply and installation of pipeline fittings

Reinstatement of disturbed surfaces

Removal and disposal of existing pipeline materials where disturbed by the works

Production of as built documentation

Production of Operation and Maintenance manuals

Approval of Operation and Maintenance manuals by the Engineer
4 | Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00

2.3.3
Access Road Construction
Access Roads Construction is a ‘build only‘ component and shall incorporate supply and construction of improvements to the access roads. Generally, road require improvements to the surface drainage, pavement replenishment and construction of stream crossings. The work to be undertaken is based on the following:
Site
Existing Road Distance (m) River Ford Crossings (No.)
Avana
Akaoa
Ngatoe
Taipara
Matavera
Tupapa
Turangi
4060
180
1590
1200
1660
2020
2220
19
N/A
1
0
3
2
0
The activities to be completed under this separable portion are, but not necessarily limited to:

Review and update of the Contractor Construction Management Plan and Programme

Clearing of vegetation

Creation of road water table drains

Supply and construction of additional pavement

Construction of concrete river ford crossings
Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00 | 5

The design of the treatment facilities will be robust in terms of performance under varying weather conditions and as such shall:

Use robust mechanical and hydraulic flow controls.

Eliminate, or minimise, the use of electricity (it is not available at most of the sites). All
Site must be reliably controlled.

Incorporate simple, low maintenance hydraulic chemical dosing systems (where required).

Be of simple construction using long design life materials (i.e. concrete) where possible for civil structures and when this is not possible metal structures shall be adequately protected for coastal and tropical environments.

Have standardised treatment systems and equipment across all sites.

Allowance for access for ongoing operation and maintenance of equipment being installed.

The footprint of the headworks to be kept to a minimum.

Equipment shall be located to minimise the extent and associated cost of new infrastructure.

Headworks location to minimise the need for erosion protection due to the proximity to the stream and the requirement for stream protection works.

Minimise lengths of watermain pipes and stream crossings.

Levels shown on Process Flow Diagram drawings are indicative only and may be modified to meet the design requirements.

Where storage is proposed at a site, floor levels of the storage tanks proposed by the contractor shall not be below the design floor level of the tank as shown in the concept design. Deviations from these levels will need to be check during tender to prove no detrimental impact to the operation of the supply system.

Where no storage is proposed at a site, the outlet from the filtration device proposed by the contractor shall not be below the outlet level of the AVG shown in the concept design. Deviations from these levels will need to be check during tender to prove no detrimental impact to the operation of the supply system.
A concept design for an appropriate treatment process has been developed for proof of concept purposes, based on the result of water quality investigations carried out at all intakes, site constraints identified during the site investigations and a review of available technology.
The concept design is as follows:

Intakes upgraded to improve water capture and reduce occurrences of blockages caused by debris in stream flows.

Settling tank with flow control arrangement at inlet to settlement tank, coagulant dosing and settlement (possibly including further aeration).
6 | Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00

No
1
5
6
2
3
4
Parameter
Sites
Detention time
Loading rate
Water Treatment
Plant Max Flow:
2900-3700 m 3 /day
Avana, Turangi,
Takuvaine
3.5 hrs
25 m 3 / m 2 / hr
4:1
Water Treatment
Plant Max Flow:
1600- 2200 m 3 /day
Avatiu, Ngatoe,
Papua, Totokoitu
3.5 hrs
25 m 3 / m 2 / hr
4:1
Water Treatment
Plant Max Flow:
1200-1400 m 3 /day
Matavera, Taipara,
Tupapa
3.5 hrs
25 m 3 / m 2 / hr
4:1 Minimum
Length:width
No of tanks
Surface area of one tank
Length
Width
58 m
2
2 – 72 m 2 64 m
1
2 – 100 m 2
1
40 m 2 - 56 m 2
7
8
15 - 19
4 - 4
16 - 18
4 - 4
12 - 14
4 - 4
9 Depth (minimum depth at outlet end)
2.9 2.9 2.9

An Automatic Valveless Gravity (AVG) filter(s) directly fed by gravity from the outlet of the settling tank.
No Description
1 Filtration rate
2 Backwash rate
Rate
Not to exceed 9 m 3 / hr / m 2 (2.5 l / s / m 2
Declining rate within range 7 mm / s
)
– 18 mm / s
3 Backwash initiation Automatic based on pressure loss with provision for manual over-ride
Hydraulic control module 4 Control

Sediment collection, drainage, drying and collection for backwash and settling tank scour.

Provision for connection of disinfection facilities if later required.

Storage tanks.
The concept design has been provided in good faith and the Contractor will be deemed to have carried out further research and investigations as needed before either offering an optimised design based on the concept design, or an alternative design.
The objectives of the treatment facilities are those consistent with the Hydraulic Levels of
Service as set out in the ICI Technical Standards for Water Supply, May 2014, Section 3.0
Design Levels of Service which states the treatment system design will not include any disinfection.
In terms of the Te Mato Vai Project the specific water quality objectives for treatment are to generally meet WHO Guidelines for aesthetic determinands at all times with allowance for unusual weather events as summarised in the table below.
Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00 | 7

2
3
4
No Determinand
1 Turbidity (NTU)
Apparent colour (TCU)
Total iron (mg/l)
Manganese (mg/l)
Treated Water Requirements
1 or < 1 NTU
5 or < 5 NTU
< 0.1 mg/l
< 0.1 mg/l
A water quality assessment and report has been completed and is included in Appendix B. This information will be required to be expanded on by the contractor after award of contract.
8 | Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00

As part of the pretender information pack it is proposed to hold a Presentation and site visit day.
The details are as follows:
Date: 12 th December 2014
Start time:
Meeting Venue:
9am (CKT)
CCECC Conference Room, Te Mato Vai Compound
Sites to be visited: Matavera, Avana, Akaoa, Totokoitu
Prospective Tenderers shall notify their interest in attending the site visit to Latu Kupa
( latu@kew.com.ws
) by 12noon 05 th December 2014 (CKT).
Information to be supplied when notifying interest in attending the site visit is as follows:
- Names of all people attending the presentation site visit
- Names of delegated representative to attend the site visit
- Name of company
There will be a maximum of 30 places available on the site visit component, as such and unless attendance allows otherwise, it is only intended that representatives of companies intending to tender for the entire project works will be selected to attend the site visit. Companies that are looking to subcontract as part of the greater project are not intended to be catered for during the site visit, however, they will be welcome to attend the presentation.
If necessary, and as available spaces dictate, it may be required to limit attendance at the site visit to 1 or 2 people per prospective tenderer.
It is proposed that the tender timeline would be as follows:
Release of Tender document: 16/12/2014
Close of Tender:
Tender Award:
06/02/2015
27/02/2015
Start of construction: 20/03/2015
These are general timeline and should not necessarily be replied on. The Te Mato Vai project reserve the right to change, alter or cease the tender process at any time.
Other information that has been collected during the design stage, and will be issued during the tender phase is as follows:
1) Basic factual geotechnical report
2) Environmental Impact Assessment (EIA)
A key component of selecting the preferred tender for this construction works will be the level of involvement of local contractors (loosely defined as a company, or operation, that would be
Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00 | 9

registered, or domiciled, in the Cook Islands, has a majority ownership by nationals of the Cook
Islands and generally, or wholly, employs people that permanently reside in the Cook Islands), and can show a successful term track record of operating in the Cook Islands.
During the design process, local contractors were requested to submit their interest in providing services to the project. Their names, contacts and general skill areas are contained in the table below, and their actual registration forms are attached in Appendix C.
There is no representation that any information supplied in this document in relation to the skills, or suitability, of these registered local contractors to complete any works associated with this project can be relied upon. The list is not extensive and is not meant to provide a full list of available local contractors. The list is also not exclusive, and any other local contractor not registered on this list would be considered in the same context as the ones that are contained on this list.
No screening has been undertaken on this list, and it is replied upon that the prospective tenderers would satisfy themselves that any contractor listed here is in fact a local contractor.
Further information on this project can be requested through contacting Latu Kupa
( latu@kew.com.ws
). No individual correspondence will be entered into with any one prospective tenderer, however, if deemed to be suitable at this point in the project process, further information may be released to all prospective tenderers by way of the Cook Islands tender website where this document has been sourced from. www.tematovai.com
; www.procurement.gov.ck
; www.pwwa.ws
; www.gets.govt.nz
10 | Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00

AC Drainage
Limited
Riki Cowan
Baker Tree Services
Limited
Nooroa Baker
Chris Holford Chris Holford
G & S Contractors Robert Wichman
Landholdings
Limited
Maoate
Contractors Limited
Master Builder
Mike Rennie
Builders Limited
Pati's Landscaping
& Construction
Limited
PTS The Plumbing
Shop
W.G. Doherty
Paul Maoate
Vira Williams
Mike Rennie
Samuel Patiora
Heather
Ian Ibbetson
+682 23582
+682 58723
+682 22164
+682 55964
+682 28499
+682 71733
+692 26980
+682 26980
+682 23415
+682 55103
+682 31773
+682 54335
+682 78365
+682 20375
+682 55256
+682 21967
+682 54038
+682 22199
'+682 55199 acdrainage@hotmail.co.nz
trim4u@oyster.net.ck
PO BOX
041
Muri
PO BOX
3277
Avarua chrisholford214@gmail.com
N/A
Yes
Yes Yes
Yes Yes Yes
Yes Yes gns.diggas@gmail.com
PO BOX
2033
Arorangi landholdings@oyster.net.ck
PO BOX 94 Yes
Yes Yes Yes
Yes Yes Yes
Yes
Yes
3
5
1
7
Arborist
52 mcontrac@aitutaki.net.ck
teuvira@hotmail.com
rennie@oyster.net.ck
patland@oyster.net.ck
ptsplumber@gmail.com
PO BOX
132
Aitutaki
PO BOX
3290
PO BOX 32
Avarua
PO BOX
3080
Avatiu
Rarotonga
PO BOX
154
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes Yes
11
-
30
8
8
Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00 | 11

Rarotonga Mining
Limited
Charlie Strickland
Rarotonga
Plumbings &
Drainage Limited
Rio Heather
Moana Bates
Rio Heather
RVK Contractors
Limited
S & T Contractors
Limited
T & M Heather
Limited
Keta Williams
Henry Ariihe'e
Joseph Heather
+682 55770
+682 25218
+682 55218
+682 72849
+682 57027
+682 55359
+682 26699
+682 55929
+682 24249
+682 55688 tinairo@oyster.net.ck
mbates@raroplumbing.co.c
k
PO BOX
203
Avarua
PO BOX
845 vantay7@hotmail.com
keta-ttn@oyster.net.ck
ariihee@oyster.net.ck
jojocontractorheather@gma il.com
PO BOX
2197
Arorangi
PO BOX
328
PO BOX
362
PO BOX
303
Avarua
Rarotonga
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes Yes Yes Yes
5
9
1
Aggregate supplier
26
12
17
12 | Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00

Drawings Content:
51-32561-01-G001 – Water Supply - Cover Page
51-32561-01-W002 – Avana – WTP Layout Plan
51-32561-01-W003 – Avana – Process Flow Diagram
51-32561-02-W002 – Avatiu – WTP Layout Plan
51-32561-02-W003 – Avatiu – Process Flow Diagram
51-32561-03-W002 – Matavera – WTP Layout Plan
51-32561-03-W003 – Matavera – Process Flow Diagram
51-32561-04-W002 – Akaoa – WTP Layout Plan
51-32561-04-W003 – Akaoa – Process Flow Diagram
51-32561-05-W002 – Ngatoe – WTP Layout Plan
51-32561-05-W003 – Ngatoe – Process Flow Diagram
51-32561-06-W002 – Papua – WTP Layout Plan
51-32561-06-W003 – Papua – Process Flow Diagram
51-32561-08-W002 – Taipara – WTP Layout Plan
51-32561-08-W003 – Taipara – Process Flow Diagram
51-32561-09-W002 – Takavaine – WTP Layout Plan
51-32561-09-W003 – Takuvaine – Process Flow Diagram
51-32561-10-W002 – Totokoitu – WTP Layout Plan
51-32561-10-W003 – Totokoitu – Process Flow Diagram
51-32561-11-W002 – Tupapa – WTP Layout Plan
51-32561-11-W003 – Tupapa – Process Flow Diagram
51-32561-12-W002 – Turangi – WTP Layout Plan
51-32561-12-W003 – Turangi – Process Flow Diagram

Water Quality Report

Contractor Registration Sheets:
AC Drainage Ltd
Baker Tree Services Limited
Chris Holford
G&S Contractors
Land holdings Limited
Maoate Contractors Limited
Master Builder
Mike Rennie Builders Limited
Pati’s Landscape & Construction Limited
PTS The Plumbing Shop
Rarotonga Mining Limited
Rarotonga Plumbing & Drainage Limited
Rio Heather
RVK Contractors Limited
S&T Contractors Limited
T&M Heather Limited