The Otara Lake Catchment
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Otara Lake
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Springs Road Stormwater Improvements

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• Application to IA of $697,000 (50% funding approved)
  - Installation of 2 gross pollutant interceptors (CDS units)
  - Construction commences today
• Stage 1 riparian planting to improve water qualityand provide habitat completed
• Stage 2 riparian planting – application for $100,000 currently lodged with IA
• This Reserve forms part of proposed Otara HeritageTrail

Installation of Litter Traps

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Litter Traps

• Installed on 2 main tributaries of the Lake
• $90,000 (50% funding provided from IA)
• 1 working very well, other to be relocated to less energetic section of stream.

Flatbush Stream Improvements

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Aim of Riparian Improvements

• Rehabilitate streams and banks of streams to a more natural condition.
• Will improve water quality
  - shade = lower temperatures
  - slows down flows
  - reduces bank erosion
• Provides better habitat for stream ecosystems
• Provides “ecological link” from headwaters to Estuary (1900ha catchment area)

Kerwyn Avenue Wetland

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Key Issues

• Industrial catchment
• no suitable area within stream for a pond / wetland only feasible area is estuarine zone
• Wetland provides >75% sediment removal efficiency
• $1,8 million application to IA (90% funding approved)
• Actual cost >$2.0 million – currently
reviewing cost/benefit

Ngati Otara Park

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Providing Recreational Facilities at Otara Lake - Outcomes

• Bathymetric Survey
• Consultation with potential recreational groups/users
  - depths
  - facilities
  - current use of fields / reserve
  - management
• Realising the “VISION” for Otara Lake
  - must be community driven taking into account costs and MCC requirements.