1. Lake Tarawera Needs Help!

2. Lake Tarawera Sewerage Update
Community Committee convened in Tarawera Sewerage Steering Committee TSSC
Identified Issues – Water Quality, Public health and the requirement for OSET
Reticulate back to Lake Okareka then to Rotorua or Local Treatment Plant
Undertake CIA Cultural Impact Assessment

3. Lake Tarawera Sewerage
From the CIA report the committee received the four guiding principles of;
The best option that halts the decline in lake water quality Te Mauri o te Wai
2 Enables the return of Iwi and best use of Maori land
3 The option that has least impact on the sites of significance
4 The management of waste and the respect for one another Tekanga

4. Lake Tarawera Sewerage
Existing Systems
391 OSET systems, 11 Resource Consents.
9 AWTS systems, 382 septic tanks (97%).
177 soak hole systems (45%), 75 trench systems (19%).
Where septic tank size known, 276 were less than the recommended minimum size of 3,000 litres (80%).
Soil Type – Rotomahana mud
Property Size – urban scale, 70% less than 1500m2.

5. Lake Tarawera Sewerage
A range of environmental constraints have been identified by BoPRC which limit effective and sustainable on-site wastewater management at Tarawera:
Existing systems
Soil type
Property size
Proximity to groundwater
Land slope

6. Lake Tarawera Sewerage
Effective and sustainable on-site wastewater management severely constrained.
On-site disposal is contributing to the nutrient and pathogen loads.
The majority of Tarawera properties (95%) do not meet current standards.

7. Lake Tarawera Sewerage
On-site systems are not likely a valid option for 43% of the community and a further 56% face significant upgrades.
Given the evidence of the impacts of OSET discharges and the upgrades required, it is considered important that the settlement is reticulated.

8. Lake Tarawera Sewerage

9. Lake Tarawera Sewerage Options
Reticulate the community with LPGP and treat at a local treatment MBR plant
Reticulate the community with STEPS and treat at a local treatment MBR plant
Reticulate the community with LPGP and treat connected to the Rotorua Plant via the Okareka connections (2)

10. Lake Tarawera Sewerage Options
Reticulate the community with STEPS and treat connected to the Rotorua Plant via the Okareka connections (2)
Do nothing and proceed the implementation of OSET

11. Lake Tarawera Sewerage
Funds secured
Government Freshwater fund $6.5m
RLC subsidy $.75m
BOPRC Grant $.75m
Total fixed subsidy $8.0m
Fixed Lump Sum Payments RLC
RLC - No payment thru rates

12. Lake Tarawera Sewerage
Option Description
Collection, reticulation and transfer main
($M)
Cost, contribution to existing trunk main TWWTP
Total capital cost estimate
July 2018
LPGP system connected to Okareka scheme via Tarawera Road
$19.8
$2.7
$22.5
LPGP system connected to Okareka scheme via Playnes farm
$17.6
$20.3
STEP system connected to Okareka scheme via Tarawera Road
$22.8
$25.5
STEP system connected to Okareka scheme via Playnes farm
$20.5
$23.2

13. Indicative Capital Cost Estimate (+30%)
Option Description
Collection, reticulation and transfer main
($M)
WWTP and LDS cost
Total capital cost estimate
LPGP system connected to a local WWTP and LDS
$17.6
$11.12
$28.72
STEP system connected to a local WWTP and LD
$20.5
$31.62
Notes:
Estimates based on 450 existing HUE and 550 future HUE.
Unit prices were based on contract prices for Rotomā/Rotoiti sewerage scheme)
Payne's farm route option cost does not include legal cost, easement fees and fees to the owner/s for land acquisition. This includes a limited road access development allowance.

14. Lake Tarawera Sewerage

15. WWTP and LDS Indicative Cost Estimate Breakdown
Particulars
Cost ($M)
Geotechnical investigation to establish site suitability
$0.50
Survey, negotiation and legal advice re. agreement for site easement or acquisition
Resource consent cost for WWTP and LDS (consultation, application hearing)
$1.00
Treatment Plant and LDS construction, including all associated equipment
$7.31
Roads, access and utilities (power and water supply)
$0.80
Design and construction supervision (10%)
$1.01
$11.12
Notes:
Estimate based on Rotomā/Rotoiti contract prices and costs

16. Lake Tarawera Sewerage
Playnes Farm Trunk Main Additional Costs
Not Included In Budget $2.2m Need To Add
Legal costs
Geotechnical
Access agreement
Access road
Annual lease charges
Unknown alignment
Stability unknown

17. Lake Tarawera Sewerage
OPTION
TOTAL UNSUBSIDISED
TOTAL SUBSIDY
COST TO BE FUNDED
Cost/HVE
COST
BY COMMUNITY
550
750
Million
LPG Via Tarawera
$ 22,500,000
$ 8,000,000
$ ,500,000
$ ,364
GST excl
$ ,333
36%
$ ,318
GST incl
$ ,233
LPG via Playnes
$ 20,300,000
$ ,300,000
$ ,400
$ ,860
39%
$ ,718
$ ,712
STEP via Tarawera
$ 25,500,000
$ ,500,000
$ ,818
$ ,332
31%
$ ,591
$ ,833
STEP via Playnes
$ 23,200,000
$ ,200,000
$ ,636
$ ,267
34%
$ ,782
$ ,306
LPGP to LOCAL NWTP
$ 28,720,000
$ ,720,000
$ ,673
$ ,626
28%
$ ,324
$ ,772
STEP to LOCAL
$ 31,620,000
$ ,620,000
$ ,945
$ ,493
25%
$ ,387
$ ,217
Total Subsidy =
MFE
$ ,500,000
RLC
$ ,000
BOPRC
$ ,000,000

18. Lake Tarawera Sewerage
OPTION
Cost/HVE
550
750
LPG Via Tarawera
$ ,318
GST incl
$ ,233
LPG via Playnes
$ ,718
$ ,860
STEP via Tarawera
$ ,591
$ ,833
STEP via Playnes
$ ,782
$ ,306
LPGP to LOCAL NWTP
$ ,324
$ ,772
STEP to LOCAL
$ ,387
$ ,217

19. Lake Tarawera Sewerage

20. Lake Tarawera Sewerage
Consideration Of On Site Options - STEPS
More culturally acceptable
Tank large size – 4 cubic meters 4000litres
Ground stability compromised
Rotomahana Mud
Section sizes
Terrain to Steep
Ground water limiting depth
More cost

21. Lake Tarawera Sewerage

22. Lake Tarawera Sewerage
Consideration Of On Site Options – LPGP
Not so Culturally acceptable
Smaller footprint
Cheaper cost
Better ground security – less disturbance
Already in use at Okareka
Easier access machinery
Only 1000litres
Community acceptable

23. Lake Tarawera Sewerage
Consideration Of Disposal – Local Treatment Plant
Culturally more acceptable
Does not remove effluent out of the catchment
Cost is prohibitive – Nearly twice
Would require local Mtc contract to operate
Requires a Local Site and Disposal Area
Requires Resource Consent
Add considerable time to project 2 to 3 years

24. Lake Tarawera Sewerage
Consideration of Pipeline Route – Playnes Farm
Culturally less preferred - Significant Sites
Cost Difference $2.2M Less Expensive BUT Many Costs not Included
Costs of Legal and Access agreements unknown
Cost of Infrastructure not Known – Roading
Geotech investigation and Cost Unknown
Access Agreement or Lease of land Unknown

25. Lake Tarawera Sewerage
Consideration of Pipeline Route – Tarawera Rd
Culturally acceptable - Road already there
Owned by Council
Known alignment
Easier to work for machinery
Better long term security
No cost of access or land agreements

26. Lake Tarawera Sewerage
The TSSC has completed its task and makes the final recommendation to be taken to Iwi and Ratepayers Meeting 20th October
A Project Steering Committee has been established to monitor the project and liaise with the Community. Committee to comprise of two Ratepayers Reps, one Iwi Rep and One Maori Land Owner Rep with an Independent Chair
A Cultural Committee has been established to assist the Council with the CIA issues

27. Lake Tarawera Sewerage
Tasks of the Project Steering Committee
Get MORE money to offset some costs
Look at options for payment over time-Banks Loans etc
Make sure you are communicated with
Ensure the project runs on time
Hear your concerns and action them

28. Lake Tarawera Sewerage
The TSSC is recommending unanimously to both Tarawera Ratepayers, to Iwi and Maori land owners Resolution That the Tarawera Wastewater system consist of onsite LPGP systems for each property and that the system trunk main connect to the Lake Okareka system via Tarawera Rd

29. The Future of Lake Tarawera

30. Lake Tarawera Sewerage
And make Lake Tarawera great again

31. Lake Tarawera Sewerage
The TSSC is recommending to both Tarawera Ratepayers, to Iwi and Maori land owners
Resolution
That the Tarawera Wastewater system consist of onsite LPGP systems for each property and that the system trunk main connect to the Lake Okareka system via Tarawera Rd
Call for a show of support