2. Mangatawa catchment consents for earthworks, storm water ...

• Make sure bund is stabilised
• Check spillway for obstructions
• Ensure no erosion at outlet
Weir Dam • Check that dams are adequately connected in to
embankment with use of sandbags.
• Check for accumulated sediment.
• Check discharge points for scouring.
Stabilised
Entranceway
Stabilising
Areas
• Install further armouring (sand bags) as required.
• Inspect any structure used to trap sediment from the
stabilised entranceway.
• Check that all stabilised areas have 80% cover.
• Identify areas that require stabilisation.
after rain
Regularly
Regularly and
after rain.
After each
rainfall event.
As works
progress (a
minimum of
once per week).
A further aspect of monitoring should be that associated with weather forecast monitoring. So as to
avoid unstable weather conditions www.metvuw.co.nz should be utilised so critical works can be
planned during a suitable weather window when adverse sediment and erosion effects can be
avoided.
Beca // 1 April 2009 // Page 12
3932036 // NZ1-1453076-10 0.10