Shot of pile driver hammering sections into ground as cofferdam is being built. CS of pile driver hammering post into ground, two men using sled hammers to drive spikes. LS of pile driver at work. LS of newly built dam. CU of steam shovel lifting logs into position so pile driver can hammer them down. CU of bulldozer levelling earth. Interior shot of powerhouse. Sequence showing men putting new generator into position, hand turning on switch. CU of turbine turning. CU of pop valve opening. CU and LS of water gushing out from dam into river. Shot of bulldozer levelling bank, PAN out over swollen river. Various shots of Fraser River. CUs of water flowing over rocks in stream. LSs of creek, of trestle bridge spanning gorge, of truck dumping fill and rocks along river bank. LS of log boom in river, of causeway. Shots men building dam, steam shovels and bulldozer. Shot of steam shovel scooping up earth from river and depositing it on pile near dam.