Printed from https://fyi.org.nz./request/29634-stormwater-overflow-calculations-st-mary-st?unfold=1 on December 25, 2024 18:59

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Stormwater overflow calculations, St Mary St

Thorndon Residents' Association made this Official Information request to Wellington City Council

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From: Thorndon Residents' Association

Dear Wellington City Council,

Context of this information request:
A platform for pedestrians, and associated raised kerb islands, were recently installed at the bottom of St Mary St, at its intersection with Tinakori Rd, Thorndon. These elevated constructions are situated beside a stormwater sump (Asset ID: WCC_SW037546). The newly constructed features interrupt stormwater overflows.

In order to assure conformance to applicable standards, calculations would have established how the modified stormwater overflows (in particular) would be expected to perform against predicted climate change rainfall increases, both with the as-built environment as well as with the catchment fully developed to the level of intensification allowed by the operative District Plan.

Information requested:
1) Please provide a copy of ALL the calculations, that informed the designer, and WCC's decisions, on the stormwater considerations for this modification of the kerb and channel.

2) Please ensure the inclusion of any calculations that demonstrate how the results compare with the City Corporation's specific Code and clauses for stormwater management.

3) Please provide any information that indicate these calculations were completed to ensure protection of adjacent property from inundation or damage.

4) Please provide copies of any correspondence, notes, documents, or records of ANY kind that relate to stormwater concerns, or issues, with this intervention at the bottom of St Mary St.

5) What was the grand total cost of these works at the bottom of St Mary St? i.e. from original concept to final engineering sign-off of the installed structure (including all contractor and WCC time and materials, etc).

Yours faithfully,

Thorndon Residents' Association

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From: BUS: Official Information
Wellington City Council

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From: BUS: Official Information
Wellington City Council

Kia ora

Thank you for your request dated 20 December 2024.

Our team will manage your request under the Local Government Official Information and Meetings Act 1987.

Please note, the period 20 December 2024 to 10 January 2025 inclusive is not considered working days under the LGOIMA. The 20 working days allowed for your response will be on hold over this period and will continue again from 10 January 2025. As a result, we will respond as soon as possible but no later than 10 February 2025.

The reference number for your request is IRC-7718

Please contact us if you have any further questions.

Kind regards,

Official Information & Privacy Team
Email: [email address]
Wellington City Council | W Wellington.govt.nz |

-----Original Message-----
From: Thorndon Residents' Association <[FOI #29634 email]>
Sent: Friday, 20 December 2024 4:37 pm
To: BUS: Official Information <[Wellington City Council request email]>
Subject: Official Information request - Stormwater overflow calculations, St Mary St

[You don't often get email from [FOI #29634 email]. Learn why this is important at https://aka.ms/LearnAboutSenderIdentific... ]

Dear Wellington City Council,

Context of this information request:
A platform for pedestrians, and associated raised kerb islands, were recently installed at the bottom of St Mary St, at its intersection with Tinakori Rd, Thorndon. These elevated constructions are situated beside a stormwater sump (Asset ID: WCC_SW037546). The newly constructed features interrupt stormwater overflows.

In order to assure conformance to applicable standards, calculations would have established how the modified stormwater overflows (in particular) would be expected to perform against predicted climate change rainfall increases, both with the as-built environment as well as with the catchment fully developed to the level of intensification allowed by the operative District Plan.

Information requested:
1) Please provide a copy of ALL the calculations, that informed the designer, and WCC's decisions, on the stormwater considerations for this modification of the kerb and channel.

2) Please ensure the inclusion of any calculations that demonstrate how the results compare with the City Corporation's specific Code and clauses for stormwater management.

3) Please provide any information that indicate these calculations were completed to ensure protection of adjacent property from inundation or damage.

4) Please provide copies of any correspondence, notes, documents, or records of ANY kind that relate to stormwater concerns, or issues, with this intervention at the bottom of St Mary St.

5) What was the grand total cost of these works at the bottom of St Mary St? i.e. from original concept to final engineering sign-off of the installed structure (including all contractor and WCC time and materials, etc).

Yours faithfully,

Thorndon Residents' Association

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