The Blues held a 33-24 lead at half-time, the Eagles staying in the contest before being on the receiving end of an avalanche across the final two periods.
Tongala outscored Echuca United 26-8 in the third quarter, which included a run of seven straight goals between the 35th and 37th minute, and netting six of the last seven in the period.
Abby Pettifer’s team was in a strong position entering the fourth, leading 59-32, but didn’t rest on its laurels, particularly on the defensive end.
Tongala held the Eagles to just seven goals in the final period while adding another 22 to its tally, running out as an 81-39 winner.
Earlier, Leesa Hooppell’s team had competed well against a more fancied opponent.
The visitors raced out to a 7-1 lead after four minutes but were quickly reeled back in, Echuca United closing the opening period by scoring six of the last nine goals to only trail 16-13 at the first interval.
At the 22-minute mark, the Eagles only trailed 23-21, with Tongala asserting its dominance from that point onwards, closing the first half by scoring 10 of the last 13 goals.
Tongala had three goalscoring contributors in Milly Brock (32), Chicquita Vick (28), and Natasha Dodos (21).
The Blues (10-4) are on a three-game winning streak and currently sit third on the ladder, above fourth-placed Moama on percentage, though the Magpies have a game in hand.
Tongala hosts Moama in round 16, with the winner of the local clash putting itself in pole position to finish third on the ladder behind Nathalia and Mulwala.
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