Shasta Dam welded penstock construction

Narrator: Among the most majestic achievements of the decade before the war was the construction of such massive dams as this one at Shasta, by which water from streams and rivers was held back, later to transform the wilderness and the solitary desert and make them blossom as the rose. And the pipes that direct the water for irrigation and also for the development of power are arc-welded. The rushing waters are harnessed and their surging drive is converted into electricity in welded turbines.