Drills during Construction At the time this tunnel was constructed, the use of new machine drills was considered better for worker safety due to the supply of constant fresh air the drills provided, promoting health and comfort. These are the two types of drills used...
Composition of the land The Niagara Parks Power Station sits on a flat parcel of solid bedrock that formed nearly 430 million years ago. The land is composed of many different layers of sedimentary rock, called strata. Here’s a look at the layers of land that were...
Arch design Voussoirs The wedge-shaped blocks used to create arches are called voussoirs. They must be precisely cut so that each adjacent block presses firmly against the next, and the load carried by an arch can therefore be properly transferred from one stone to...
COMMON SURVEYS Before construction of the tunnel began, a series of tests were conducted along the proposed tunnel route to determine the nature of the land beneath the power station. This information was crucial for tunnel excavators to know what they could...
