The goal marked the second of the period and third in a row for the Big Green, who at one point trailed 2-0.
At the start of the period, Dartmouth defenseman Correne Bredin received a pass from McCollough and took advantage of the screens in front of Kuusisto to shoot it past her and give the Big Green a 4-3 lead.
McCollough tallied a few minutes later to give Dartmouth a seemingly insurmountable lead, but the Crimson fought to get back into the game.
Placing increasing pressure on Big Green goalie Amy Ferguson, Harvard finally broke through 14:56 into the third period.
Senior forward Tammy Shewchuk, making her season debut after missing the Crimson's first four games, came flying down the right side while senior forward Kiirsten Suurkask approached from the left with the puck. Suurkask drew Ferguson to the left side and passed to Shewchuk, who easily found the wide open net to cut the Dartmouth lead to 5-4.
However, the Crimson's comeback would be halted shortly afterwards when Harvard received a checking penalty, which would leave it a man short for two minutes with two and a half to play.
After the penalty expired, the Crimson pulled the goalie and tried to mount a last minute offensive with the extra attacker, but the lack of time would end any hopes of overtime and the Big Green's dominance continued with its win.
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