Behind this door at Canberra Stadium, a stinky smell keeps haunting the Raiders

It was just last year that Raiders coach Ricky Stuart attracted national attention to the poor state of the ageing stadium when he expressed his dismay - and embarrassment - at the foul odour emitted near the player change rooms at an NRL game.

Nearly to the day 12 months ago, it was the Wests Tigers that had the pleasure of that experience, but on Saturday night, it was the Brisbane Broncos' turn.

After the game, a sewage-like smell wafted through the tunnels under the Mal Meninga Stand outside the home and opposition change rooms and media area, leading to Broncos staff complaining about the conditions.

Like last time the mishap occurred, it is understood the rotten eggs stench once again came from the same pit room in the underbelly of the stadium that has two heavy sewer pit lids on the floor.

The 8-by-6 metre pit room has a lockable green door, but if opened, and if the sewer pit is at its capacity - as it could have been with nearly 19,000 at the stadium on Saturday night - a bad smell can travel through to the adjacent players' and officials' rooms.

"That's what you get with a 50-year-old stadium. It should be better than that," frustrated Raiders chief executive Don Furner told The Canberra Times.

"We have a team coming from Brisbane and they're right next to it.

"Honestly I'm sick of talking about the stadium. It's just embarrassing and disappointing that that's what we get."

Furner and Stuart have long been passionate advocates for a new state-of-the-art stadium for Canberra.

The ACT government has committed to building a new 30,000-seat venue by 2033 and integrating it with the North Canberra Hospital, CIT and the Australian Institute of Sport in Bruce. However, no official plans have been revealed, and construction is yet to commence.

Broncos coach and former Canberra assistant coach Michael Maguire didn't comment about the smell after this side's 32-22 defeat to the rampaging Raiders, but as a local product, he was aware of the necessity for a new stadium in the capital.

"Obviously I've spent a bit of time here and being a Canberra boy we'd love to see a new stadium," Maguire said in the press conference.

In addition to the disgusting odour under the stadium during the Broncos' visit, it's understood that internet connection issues caused a major ticketing outage and havoc for patrons and venue staff alike.

On Sunday, Venues Canberra did not wish to comment on the latest incidents at the stadium.

The new stadium proposed by the Andrew Barr-led ACT government is expected to cost at least $500 million but the Chief Minister has asked Prime Minister Anthony Albanese to pay 50 per cent of the costs.

The existing Canberra Stadium venue, built in 1977, is owned by the federal government and, in 25 years, has had only minimal cosmetic improvements.