More than £227,000 is needed to complete ongoing works at the NSC.
Tynwald will be asked to approve the funds for the flumes at this month's sitting - taking place next week.
The Department of Education, Sport and Culture says the overspend is because of ongoing problems regarding the leisure pool and flumes.
The facility has been closed since August 2018.
Well-known farm in the west up for sale
A landmark farm in the west of the Island has gone on the market.
Pet foodbank needs your help!
An Island organisation which acts as a food bank for pets on the Island is appealing for urgent help after a surge in demand.
How much cash can government raise in 10 days, asks MHK
How much cash can the government lay its hands on in 10 days if it needed to?
LegCo considers meeting on a different day
Should the Legislative Council sit on a different day in future?
Extra promenade bus facilities would cost estimated £735k
The Department of Infrastructure says extra bus stops and shelters at the end of Douglas Promenade would cost around £735,000.
Medieval cross returned home to Royal Chapel
A medieval cross dating back to the 10th century has returned to the Royal Chapel of St John's.
Arbory MHKs in "parasite politicians" spat
A question about nicotine pouches has turned into a social media spat between MHKs in the south of the Island.
Tyson Fury's boxing glove sold for £7k in charity auction
Island resident Tyson Fury's boxing glove has been sold for £7,000 at a charity auction.
