The school's bursar, Andrea Owens, wrote: "The school has 200 pupils who all have to gain access to/from the school via car or minibus due to the remote location and lack of pedestrian access at the start and end of every school day.
The club is run entirely by volunteers, and charges its juniors about £1.33 per session.Just replacing the sculls - its smallest, cheapest boats, would cost about £120,000.
Mr Plant is concerned that repeated flooding would put off the next generation of rowers."It's a constant battle of keeping members, retaining them, when we can't get out and do what we love," he said."If somebody loves a sport, and you get told you can't do that for six months of the year because the river's going to flood, then it's a real impact on you."
The club is now looking to use a shipping container to store its boats, using grant money from Telford and Wrekin's flood recovery fund."We've already lost three weeks of the season so far, just from the previous two storms, and that affects the training and effects how we go forwards," Mr Plant said.
He added the financial implications of losing the boats also puts its members' safety at risk.
"If something happens here, everybody gets in their cars," he said."We've got a good business case. We just need a quick decision."
Restoring the line requires about three miles (5km) of new track.It was going to be funded by the Restoring Your Railway programme, before it was axed, with new stations to be built in the town centre and in Pill, as part of the Metrowest mass transportation project.
The Portishead link's price tag of £152m was set to have been partly funded by the DfT, which paid upfront costs of around £45m as part of the Restoring Your Railway fund.This was accompanied by additional funding from the West of England Combined Authority (WECA) and North Somerset Council.