An inquest into the deaths was held at the end of 2017 and the jury found the family had drowned due to misadventure.

A garda (Irish police officer) told the inquest the slipway was “extremely slippery with thick algae”.

“I’m angry because the slipway wasn’t cleaned,” Louise said.

“It should have been cleaned. If it had been cleaned then this wouldn’t have happened.

“It’s full of algae and precautions should have been put in place for every slipway to be cleaned.

“There’s no individual that’s responsible for this.

“If the council had cleaned it then it would have been prevented.”

In response to a request for comment, Donegal County Council directed the BBC to the Donegal Coroner’s office.

At the time, the council said that when “the facts surrounding this unfortunate tragedy are established, the council will review them and determine if any specific measures need to be taken”.

The inquest also heard Sean McGrotty had a blood alcohol level of 159mg, above the Republic of Ireland’s drink-driving limit of 50mg.

However, a pathologist told the inquest she could not say what level of impairment a driver with that level of alcohol could have.

The jury also recommended that Irish Water Safety take a prominent role with other agencies in implementing best practice in relation to safety at piers and slipways.

Davitt Walsh, the former footballer who swam out to rescue Rioghnach, was later awarded the Michael Heffernan Gold Medal for Marine Gallantry.

Louise said she was extremely grateful to him and was also indebted to the other emergency services for their efforts on that day.

A special 5K memorial walk is taking place at 11:00 local time on Sunday in Buncrana to remember the lives lost.

Louise said she wanted people to dress in red and white if they could.

“Hopefully it’ll be beautiful and we’ll be relying on them to sort out the weather,” she said.

“Every memory I have is happy. Every picture I have they are smiling.

“They’re carrying on. They loved life.

“They loved each other and that’s what it’s about. It’s about loving life and living it.”