A new adventure tourism scheme in Wellington is being planned next to a landfill and could struggle to operate for more than half the year in the city's wind.
A zipline has been proposed at the Southern Landfill, which is made up of about 900ha of council-owned hill country.
The commercial venture would consist of four ziplines and the longest would stretch 575m.
Wellington City Council's City Strategy Committee is considering whether to grant a lease for the project, which would have to undergo consultation first.
Changing Altitude Limited's business plan for the venture said the city was lacking an adventure-based tourism activity.
"Imagine a new visitor to the city whizzing down a zipline whilst absorbing the incredible views."
The council's open space and parks manager Myfanwy Emeny said visitors could get glimpses of the landfill too, although it only accounted for a small portion of the overall land.
She did not think the smell would be a considerable problem.
"The landfill is a really big site and they do a whole lot of work to reduce the odour and the operation of the zipline isn't going to be any closer than some of the residential houses around there."
Other sites have been considered for the zipline, including Mt Victoria and Shelly Bay but were discounted for reasons like accessibility.
One problem, which is near impossible to avoid in the capital, is its weather.
Council documents said the weather-dependant operation may only be able to operate for not much more than half of the year.
The project's business plan said wind speeds of 70km/h would likely be the maximum speed the zipline could operate in.
Wellington's rain and cold temperatures were also taken into consideration, producing a final conservative estimate of 210 operating days each year.
Changing Altitude was still confident the business was feasible.
"As you get down into the valley, the site is very sheltered from southerly direction winds, and is still viable in a strong northerly."
The plan said wind monitors could also be installed at the takeoff platforms to help guides decide whether people could safely use the ziplines.
Emeny said she was confident the project would have minimal impact on the environment.
She said the main work was clearing vegetation, mainly gorse and scrub.
Emeny said there were also native birds in the area.
"It's a really huge landscape and if any of the birds are a little bit bothered by what's happening then they've actually got plenty of other spaces."
The project will go before Wellington city councillors on Thursday.