|
MANAGEMENT PLAN
Utilities
Trelissick Park is strategically important with regard
to stormwater and sewer services in the northwestern suburbs.
The Kaiwharawhara and Korimako Streams are a major stormwater
system draining the valley from Karori and Northiand to
the south , to Ngaio and Khandailah to the north. Within
the park there are also a number of stormwater pipes,
culverts and open streams which discharge stormwater into
the Kaiw harawhara and Korimako Streams. A stormwater
tunnel under the railway embankment takes the flow from
the Kaiwharawhara Stream from the Otari/Wilton area to
the main stream which is a combination of the Korimako
and Kaiwharawhara Streams. A recently upgraded sewer pipe
is located within the tunnel.
Major sewer lines which convey sewage flow from Wilton,
Crofton Downs and parts of Khandailah and Karori to the
main sewer inte rceptor pass beneath the park. The 450
and 525mm diameter pipelines were replaced in 1984. As
a consequence of this work there are some lengths of abandoned
pipe lying within the park. There is also a length of
older sewer pipe of varying ages towards the eastern end
of the park. This pipe takes the flow from Wadestown.
Upgrading works on this pipelines are planned in the 1994/95
financial year. While most of the sewer lines are underground
there are locations throughout the park where pipelines
and manholes are quite vi sible. Two grill covered tunnel
portals can be seen from the main track when walking beside
the Kaiwharawhara Stream. Generally the sewer infrastructure
within the park while quite visible it is not generally
obtrusive.
The 110kv Khandallah to Wilton transmission line passes
over the park. Pylons are located on the Northern Walkway
spur below Trelissick Crescent and on the area below Oban
Street in Highland Park.
|
