▁this ▁program ▁included ▁putting ▁conv icted ▁First ▁Nation ▁and ▁M ét is ▁in m ates ▁to ▁work . ▁An ▁in mate ▁camp ▁was ▁constructed ▁at ▁Lac ▁La ▁B iche , ▁and ▁prisoners ▁were ▁used ▁to ▁construct ▁tra ils ▁and ▁facilities ▁in ▁the ▁park . ▁ ▁H ydro log y ▁ ▁D rain age ▁bas ins ▁The ▁Lak eland ▁area ▁str add les ▁two ▁d rain age ▁bas ins , ▁and ▁is ▁thus ▁dra ined ▁by ▁two ▁major ▁river ▁systems , ▁the ▁Ath ab as ca ▁and ▁the ▁Be aver - Ch urch ill . ▁The ▁Ath ab as ca ▁River ▁d rain age ▁bas in ▁is ▁the ▁second ▁largest ▁d rain age ▁bas in ▁in ▁Al berta . ▁It ▁dra ins ▁ 5 ▁of ▁the ▁major ▁la kes ▁in ▁the ▁north - west ▁section ▁of ▁the ▁Lak eland ▁area , ▁including ▁Black ett , ▁D ab bs , ▁Kin na ird , ▁and ▁McG uff in ▁la kes , ▁which ▁all ▁flow ▁into ▁Jackson ▁Lake . ▁Jackson ▁Lake ▁is ▁dra ined ▁by ▁G ull ▁Creek , ▁which ▁ultimately ▁flows ▁into ▁the ▁P iche ▁River , ▁which ▁in ▁turn ▁joins ▁the ▁O w l ▁River , ▁then ▁Lac ▁La ▁B iche , ▁the ▁La ▁B iche ▁River , ▁and ▁ultimately , ▁into ▁the ▁Ath ab as ca ▁River ▁and ▁on ▁to ▁the ▁Ar ctic ▁Ocean . ▁ ▁The ▁other ▁major ▁la kes , ▁in ▁the ▁south - east ▁section ▁of ▁the ▁Lak eland ▁area , ▁are ▁in ▁the ▁Sand ▁River ▁sub - bas in