Plans which included a translucent dome look set to be scrapped ©Getty Images

Plans for a $100 million (£81 million/€94 million) complex on the site of the old Belmont Plaza Olympic Pool in Long Beach look set to be downsized due to the cost of the project.

The facility hosted the United States Olympic swimming trials in 1968 but was torn down in 2014 with plans for a rebuild.

This would have included a translucent half dome, four different pools, a movable floor, whirlpools and permanent indoor seats.

However, the city of Long Beach is expected to vote to scale back the project tomorrow.

It is now set to feature three smaller outdoor pools, diving boards, ziplines and climbing walls.

The old Belmont Plaza Olympic Pool, which hosted the US Trials in 1968 ©Getty Images
The old Belmont Plaza Olympic Pool, which hosted the US Trials in 1968 ©Getty Images

The pool was not due to host events at the Los Angeles 2028 Olympics, but formed part of the "8 by 2028" ambitions of former Long Beach Mayor Robert Garcia, who hoped for eight infrastructure projects to be completed in the city in time for the Games.

"The city intends to provide these resources in a fiscally sustainable way," a statement said.

"This revised project does not meet every user's needs, but the city of Long Beach still believes it will provide an immense amount of recreational value."

As well as the cost, rising sea levels and complaints from nearby residents are also said to have encouraged officials to opt for a smaller project.

The nearby Belmont Veterans Memorial Pier is due to be rebuilt to host sailing at Los Angeles 2028.