‘Tsunami’ of Stormwater Swells L. Horowhenua

State of Lake Horowhenua disturbs guardian Phil Tauekei guardian of Lake Horowhenua

Horowhenua correspondent Veronica Harrod says there has been a tsunami-like increase in the stormwater network discharging into Lake Horowhenua.

39 more kilometres added

An extra 39 kilometres have been added since 2008 — a fact the public have been kept in the dark about.

In a 2008 Hokio Drainage report Horizon’s regional council stated, “The current Scheme maintains a 6 km network of drains.”

Yet by 2018 a Hokio 2018-2028 report said there was, “45 km of drainage channels covering 6,100 hectares.”

Catchment discharges into Lake

The Horizon’s 2008 report also says the “Majority of the catchment discharges directly into Lake Horowhenua. Predominantly servicing dairy and horticulture land.

“Water quality in Lake Horowhenua is more affected by catchment-wide nutrient runoff from intensive dairy farming, horticulture and market gardens and

Lake Horowhenua (photo by David White)

polluted urban runoff from Levin.”

“These larger issues are beyond the scope of this review. However in any case it would be desirable for more effort to be applied by market gardeners to take suitable measures and implement best practice guidelines for reducing the soil and nutrient runoff from their fields.”

The extended scheme

An exponential increase in the network follows a recommendation made in the 2008 Hokio Drainage Scheme Review Report that it, “Include the full length of the Hokio Stream and the main watercourses (including old water races) up to at least the State Highway in the extended Scheme.”

“The need for a Scheme in the Kimberley – McLeavey Road – Arapaepae Road area is likely to become even more desirable in future if the old Kimberley Centre is sub-divided for development.”

Kimberley Centre subdivision

The Kimberley site before development started

A resource consent application to develop the former Kimberley Centre into a 500 house sub-division submitted by Truebridge Associates Ltd’s on behalf of Horowhenua Council deputy mayor Wayne Bishop’s company, Wayne Bishop Investments Ltd, says, “All new stormwater requirements will be dealt with on-site via soak pits…it is not proposed to put additional stormwater into the open drain on the road.

“At present the roading drains to an underground system that terminates in the large open drain that runs along the southern side of the State Highway.

The New Zealand Transport Agency (NZTA) has indicated they are prepared to allow this to continue provided no additional water is placed into the system.”

Horizon’s consulted with Horowhenua District Council during the 2008 review, “regarding their expectations for the future management of drainage in the catchment.”

But they did not consult the Lake Horowhenua owners.

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