This is an HTML version of an attachment to the Official Information request 'Cost of retaining wall and safety of existing Mangapapa School buildings'.

25 May 2022 
J Wicks 
[FYI request #19241 email] 
Tēnā koe 
Thank you for your email of 29 April 2022 to the Ministry of Education requesting the 
following information:  
The following information is sought about Mangapapa School, 5 Rua Street, Gisborne 
1. What was the full cost of building the original retaining wall on the Mangapapa
School bank bordering Mangapapa Stream?
2. What subsequent costs have been incurred in rectifying flood water damage to the
original retaining wall on the Mangapapa School bank bordering Mangapapa
Stream?
3. What are the ongoing maintenance costs for the retaining wall on the Mangapapa
School bank bordering Mangapapa Stream?
4. How many geotec surveys were undertaken on the grounds of Mangapapa School
for number 2 and number 5 Rua Street in 2020 and 2021 and what were the results
of each survey?
5. How many geotec surveys were undertaken on the grounds of Mangapapa School
for number 2 and number 5 Rua Street in 2020 and 2021 and what were the costs of
each survey?
6. Are plans in place to build a new retaining wall along the Mangapapa School bank
bordering Mangapapa Stream and if so, what wil  it cost?
7. Is reinforcing work planned on the existing retaining wall along the Mangapapa
School bank bordering Mangapapa Stream and if so, what wil  it cost?
8. Is the Mangapapa School Hall at risk of slipping into Mangapapa Stream?
Your request has been considered under the Official Information Act 1982 (the Act). 
Please find the responses to your individual questions below. 
OIA: 1286886 
National Office, Mātauranga House, 33 Bowen Street, Wellington 6011 
PO Box 1666, Wellington 6140. Phone: +64 4 463 8000 Fax: +64 4 463 8001 
education.govt.nz 

 
Question OneWhat was the full cost of building the original retaining wall on the 
Mangapapa School bank bordering Mangapapa Stream? 
 
The construction of building the original retaining wall was completed in 2008 at a cost of 
$515,631.63 plus GST. 
 
Question Two: What subsequent costs have been incurred in rectifying flood water 
damage to the original retaining wall on the Mangapapa School bank bordering 
Mangapapa Stream? 
 
As the Mangapapa Stream had the potential to undermine the original retaining wall, a 
Gabion rock wall was installed in 2012 to stop erosion and to stabilise the base of the 
retaining wal , at a cost of $70,441.73 plus GST. 
 
Question Three: What are the ongoing maintenance costs for the retaining wall on the 
Mangapapa School bank bordering Mangapapa Stream? 
 
As previously advised, this part of your request was transferred to Mangapapa School on  
4 May 2022 under sections 14(b)(i) and 14(b)(i ) of the Act, as the Ministry of Education does 
not hold this information and as it is more closely connected to the functions of Mangapapa 
School. 
  
Question Four: How many geotec surveys were undertaken on the grounds of 
Mangapapa School for number 2 and number 5 Rua Street in 2020 and 2021 and what 
were the results of each survey? 
 
We have identified two geotechnical surveys that have been commissioned and completed, 
as follows: 
  •  BCD Group - 19 January 2018 (66 pages) – attached as Appendix A 
•  LDE, Land Development Engineering - 26 July 2019 (293 pages) – attached as 
Appendix B
 
Each survey involved multiple tests across the site as part of the school redevelopment 
project. 
 
Initial geotechnical investigations were completed in 2018 and 2019, with further 
investigation work completed in 2021. The outcome was that the affected site can be 
remediated for building construction. 
 
Question Five: How many geotec surveys were undertaken on the grounds of 
Mangapapa School for number 2 and number 5 Rua Street in 2020 and 2021 and what 
were the costs of each survey? 
 
As noted above, two geotechnical surveys were conducted. I am withholding the costs of 
these under 9(2)(b)(i ) of the Act, as release of this information would be likely unreasonably 
to prejudice the commercial position of the person who supplied or who is the subject of the 
information. 
 
Question Six: Are plans in place to build a new retaining wall along the Mangapapa 
School bank bordering Mangapapa Stream and if so, what will it cost? 
 
There are no plans to build a new retaining wall bordering Mangapapa Stream. A palisade 
wall is being built as part of a classroom building foundation system for stage three of the 
redevelopment project.  
education.govt.nz 
 


 
 
Question Seven: Is reinforcing work planned on the existing retaining wall along the 
Mangapapa School bank bordering Mangapapa Stream and if so, what will it cost? 
 
There are no plans to reinforce or replace the existing retaining wall bordering Mangapapa 
Stream. 
 
Question Eight: Is the Mangapapa School Hall at risk of slipping into Mangapapa 
Stream? 
 
There is no known risk with the Mangapapa School Hall. 
 
Please note, the Ministry now proactively publishes OIA responses on our website. As such, 
we may publish this response on our website after five working days. Your name and contact 
details wil  be removed. 
 
Thank you again for your email. You have the right to ask an Ombudsman to review this 
decision. You can do this by writing to [email address] or Office of the 
Ombudsman, PO Box 10152, Wellington 6143. 
 
 
Nāku noa, nā 
 
 
 
 
 
Scott Evans 
Hautū | Deputy Secretary 
Te Puna Hanganga, Matihiko | Infrastructure and Digital 
education.govt.nz