Tunnel, which has a number of high profile supporters including Hollywood star Michael Sheen, is currently owned by Highways England, who have said they are willing to hand it over to either the Welsh Government or the two local authorities - Neath Port Talbot and Rhondda
However, until ownership is under Welsh control, it means that the Rhondda
Tunnel Society can't yet apply for the sorts of multi-million-pound grants and funds delivered by organisations such as the Heritage Lottery Fund and the Coalfields Regeneration Trust.
The grant, from Pen y Cymoedd Wind Farm Community Fund, will pay for a detailed examination of the long-abandoned 3,443-yard-long tunnel (3,148 m) that runs between Blaencwm in the Rhondda
to Blaengwynfi in the Afan Valley.
The Twilight Saga actor speaks passionately about the location and the Rhondda
Tunnel project in the clip.
A request from Cardiff Council on the evening of Friday, October 14, asked Rhondda
Cynon Taf Council to temporarily house two asylumseekers.
"This will then give the all-clear for either the Welsh Government to take ownership of the tunnel from Highways England or perhaps a joint share with Neath Port Talbot council, Rhondda
Cynon Taf council and the Welsh Government."
AM cycled from the Rhondda
Tunnel entrance portal in Blaencwm with schoolchildren, tunnel supporters and representatives from national cycle charity Sustrans Cymru to the shop, which is situated on Station Road, opposite the Park & Dare Theatre.
For many, the Welshman remains best known for his instrumental work in helping hundreds of Rhondda
rugby players turn their dreams into reality, including Wales international star Matthew Rees.
Tunnel Society, which wants the tunnel to reopen as a cycle and pedestrian route, has undertaken the topography survey to determine the land required to be dug out at the entrance to the tunnel at the top of the village of Blaencwm in the Rhondda
"We are now hoping to meet again soon to discuss the transfer of ownership of the tunnel from Highways England," said Rhondda
Tunnel Society chairman Stephen Mackey, who is overseeing the opening of the society's very first office to be based in Treorchy.
Plans to reopen the Victorian tunnel, which runs between Blaencwm in the Rhondda
and Blaengwynfi in the Afan Valley, recently received a huge boost with the award of a five-figure grant.
Plaid's vote in Rhondda
rose 21.1% and Labour's fell by 27.8% in a disastrous result that saw Welsh Labour lose its only seat of the 2016 Assembly election.