Former Magpies speedster Shannan Chase, who played fullback, was safe under the high ball and produced some quality offloads in the slippery conditions. Central rugby player Kody Lancaster, like Otane rugby player Joe Phillips, operated well in the centres.
Waaka and fellow prop Wes Rapana were powerful on the carry. Prop Ramiha Smiler was the best of the Bridge Pa forwards and deserved his two tries. Secondrower Ivan Bellamy had some memorable patches.
Fullback Jarome Mareikura and winger Harris Solomon made the most of their limited opportunities. Mareikura, who scored two late tries the previous week in their semifinal win against Dannevirke Tigers, scored a late try on Saturday to put Bridge Pa ahead 18-16.
Bridge Pa fans thought that was enough - until Araia-Walker had the final say. Former Magpies halfback Isaac Paewai was a busy substitute for Bridge Pa and did well to put Solomon away for his 34th-minute try.
Bridge Pa co-coach George Hokianga agreed Kahuranaki deserved their title.
"We made a few mistakes and Kahuranaki came to play. But we will be back next year."
Hokianga also heaped kudos on the Waka Leonard-coached Maraenui team who beat his Bridge Pa reserves 30-12 in their grand final. Bridge Pa beat Tamatea 24-6 in the women's grand final.