The amount Nottinghamshire County Council pays to rent land at King’s Mill Reservoir will double ahead of planned new adventure facilities being built.
The Conservative-led authority will enter a new rental agreement with landowner Ashfield District Council as the popular site gets more attractions.
The council’s facilities include a central building, a climbing tower, a zip wire and an outdoor classroom at The Mill Adventure Base.
Activities include archery, artificial caving, high ropes challenges, mountain biking, kayaking, sailing and canoeing.
It couples separate facilities being brought forward by the district council, including a large outdoor watersports facility and an 80-seat restaurant.
The two authorities and the Heritage Lottery Fund are investing millions into the reservoir to turn it into one of the county’s most popular attractions.
The county council’s facilities are focused on educational activities for young people across the county and have the capacity for 120 people on a day visit.
There is also space for 36 people on residential visits in overnight ‘camping pods’.
The authority currently has two lease agreements in place at the site, once since 2004 and the second since 2015, totalling £1,050 per year.
But the planned improvements will see the rent double to £2,175 per year and run until the end of 2041.
Extra parcels of land will be included in the combined agreement so the county council can create and maintain a new footbridge.
It will include rights for the Ashfield Independent-led district council to connect to existing sewerage networks for its new facilities.
The new lease agreement, including the use of the extra parcels of land, was approved by the county council this month.
In reports, Matthew Neal, service director for investment and growth, said: “The council has approved further investment in the centre to provide outdoor activities to be made available to the wider public.
“[This will increase] numbers and help to make the centre become self-financing.
“This will include the construction of a new hub building and footbridge, a climbing tower, zip wire and an outdoor classroom.
“The additional land is required for the next phase of capital investment and the taking of a lease until December 2041 will provide a secure term for this.
“Bringing the site into one lease will ensure it can be managed coherently for the duration of the partnership agreement.”
Cllr Matthew Relf (Ash Ind) is Ashfield District Council’s cabinet member for regeneration and corporate transformation.
He previously said: “The plans for King’s Mill Reservoir are extremely exciting.”