Geotechnical engineering, also known as geotechnics, is the branch of civil engineering concerned with the engineering behavior of earth materials. It uses the principles of soil mechanics and rock mechanics to solve its engineering problems. It also relies on knowledge of geology, hydrology, geophysics, and other related sciences.
Engineering geology is the application of geology to engineering study for the purpose of assuring that the geological factors regarding the location, design, construction, operation and maintenance of engineering works are recognized and accounted for. Engineering geologists provide geological and geotechnical recommendations, analysis, and design associated with human development and various types of structures. The realm of the engineering geologist is essentially in the area of earth-structure interactions, or investigation of how the earth or earth processes impact human made structures and human activities.
Karl von Terzaghi was an Austrian mechanical engineer, geotechnical engineer, and geologist known as the "father of soil mechanics and geotechnical engineering".
Shalalth and South Shalalth are unincorporated communities on the northern shore near the western end of Seton Lake in the Squamish-Lillooet region of southwestern British Columbia. The localities are by road about 63 kilometres (39 mi) northwest of Lillooet, but only 24 kilometres (15 mi) by rail.
Sir Alec Westley Skempton was an English civil engineer internationally recognised, along with Karl Terzaghi, as one of the founding fathers of the engineering discipline of soil mechanics. He established the soil mechanics course at Imperial College London, where the Civil and Environmental Engineering Department's building was renamed after him in 2004, and was knighted in the 2000 New Year Honours for services to engineering. He was also a notable contributor on the history of British civil engineering.
The Bridge River is an approximately 120 kilometres (75 mi) long river in southern British Columbia. It flows south-east from the Coast Mountains. Until 1961, it was a major tributary of the Fraser River, entering that stream about six miles upstream from the town of Lillooet; its flow, however, was near-completely diverted into Seton Lake with the completion of the Bridge River Power Project, with the water now entering the Fraser just south of Lillooet as a result.
Lajoie Dam is the uppermost of the storage dams of BC Hydro's Bridge River Power Project, which is located in the southwestern Interior of British Columbia. It is located just west of the small semi-ghost town of Gold Bridge. An earthfill structure, it is 87 m (287 ft) and impounds c. 570,000 acre-feet (700,000,000 m3) of water in Downton Lake Reservoir. The Lajoie Powerhouse generates 22 MW with an average generating capacity of 170 GWh/year. A few miles downstream is Carpenter Lake, which is formed by Terzaghi Dam, the largest of the Bridge River Power Project's structures.
Tyaughton Creek, formerly gazetted as the Tyaughton River, also historically known as Tyoax Creek, is a 50 kilometre tributary of British Columbia's Bridge River, flowing generally southeast to enter the main flow of that river about mid-way along the length of Carpenter Lake, a reservoir formed by Terzaghi Dam of the Bridge River Power Project.
Tyaughton Lake, also known as Tyax Lake, is a lake in the Bridge River Country of the West-Central Interior of British Columbia, Canada, located to the north of Carpenter Lake, a reservoir along the Bridge River formed by Terzaghi Dam of the Bridge River Power Project. Among the largest of a number of well-known fishing lakes located in valleys flanking the Bridge River, its name is an adaptation of a Chilcotin word meaning "jumping fish". Around its shores is a community of recreational homes, and near its southern end had been an older fishing lodge, the Tyaughton Lake Lodge, while on its northwestern shore is the Tyax Mountain Lake Resort, built in the 1980s, which at the time of construction was the largest log structure built in British Columbia in the 20th Century. Despite the shared name, it is not directly on the course of Tyaughton Creek, but is linked to the lower canyon of that creek by a short intermediary stream. The main road access is from the Gun Creek Forest Service Road from a junction on BC Highway 40 (the Gold Bridge-Lillooet Road midway between the outlets into Carpenter Lake of Tyaughton Creek and Gun Creek.
Carpenter Lake, officially Carpenter Lake Reservoir, is the largest of the three reservoirs of the Bridge River Power Project, which is located in the mountains west of Lillooet, British Columbia. The lake is about 185 kilometres north of the province's major city of Vancouver and is formed by the 1951 diversion of the Bridge River by Terzaghi Dam into Seton Lake via a tunnel through Mission Mountain, which separates the Seton and Bridge drainages. Several ranches and homesteads in the broad serpentine of the upper Bridge River basin were flooded out by the hydro project, which changed the character of the upper valley forever.
The Bridge River Power Project is a hydroelectric power development in the Canadian province of British Columbia, located in the Lillooet Country between Whistler and Lillooet. It harnesses the power of the Bridge River, a tributary of the Fraser, by diverting it through a mountainside to the separate drainage basin of Seton Lake, utilizing a system of three dams, four powerhouses and a canal.
Ralph Brazelton Peck was a civil engineer specializing in soil mechanics. He was awarded the National Medal of Science in 1976 "for his development of the science and art of subsurface engineering, combining the contributions of the sciences of geology and soil mechanics with the practical art of foundation design"?
The Seton Powerhouse is a hydroelectric generating station on the Fraser River just below the confluence of the Seton River at the town of Lillooet, British Columbia, Canada. The powerhouse is fed by the Seton Canal, a 5 km diversion of the flow of the Seton River which begins at Seton Dam, just below the foot of Seton Lake to the west. The powerhouse is the last in sequence, and smallest, of the generating stations of BC Hydro's Bridge River Power Project, which diverts the flow of the Bridge River into Seton Lake. The powerhouse uses only 50 feet of head between Seton Lake and the Fraser to produce a maximum generating capacity of 42 MW and an average capacity of 330 GWh per year.
The Seton Canal is a diversion of the flow of the Seton River from Seton Dam, just below the flow of Seton Lake, to the Seton Powerhouse on the Fraser River at the town of Lillooet, British Columbia, Canada. The canal bridges Cayoosh Creek 300m below its commencement and is about 3.5 km in length, ending just below a bridge used by the Texas Creek Road, where the canal's waterflow is fed into tunnels which feed the Seton Powerhouse on the farther side of a small rocky hill. Most of the water carried by the canal is the volume of the diverted Bridge River, which is fed into Seton Lake via BC Hydro's Bridge River generating stations at Shalalth, 16 km to the west, which are supplied by diversion tunnels through Mission Ridge from Carpenter Lake, the reservoir created by Terzaghi Dam.
Seton Dam is a dam on the Seton River, 350m below the outlet of Seton Lake 5 km west of the town of Lillooet, British Columbia, Canada, and with the related Seton Canal is part of the lowest and last stage of BC Hydro's Bridge River Power Project. The 18-meter-high (59 ft) concrete dam, completed in 1956, raised the height of Seton Lake only 10 feet in order to maximize the elevation differential between that lake and the Fraser River in order to extract the maximal potential output of power generation at the Seton Powerhouse, which is located on the Fraser just south of the confluence of the Seton River proper.
Cayoosh Creek is a northeast-flowing tributary of the Seton River in the Canadian province of British Columbia. The name Cayoosh Creek remains on the bridge-sign crossing the stream on BC Highway 99 and continues in use locally to refer to the final reaches of the Seton River, formerly Seton Creek, which prior to the renaming ending at the confluence with Cayoosh Creek. The creek is the namesake of Cayoosh Creek Indian Reserve No. 1, one of the main Indian reserves of the Cayoose Creek Indian Band, which lies adjacent to what was renamed the Seton River without local consultation.
Alouette Lake, originally Lillooet Lake and not to be confused with the lake of that name farther north, is a lake and reservoir in Maple Ridge, British Columbia, Canada. It is located at the southeast foot of the mountain group known as the Golden Ears and is about 16 km in length on a northeast–southwest axis. It and the Alouette River, formerly the Lillooet River, were renamed in 1914 to avoid confusion with the larger river and lake farther north, with "Alouette", the French word for "lark", being chosen as being melodious and reminiscent of the original name in tone.
Mission Ridge, also known as Mission Mountain, is a ridge in the Bridge River-Lillooet Country of the South-Central Interior of British Columbia, Canada, extending westward from the town of Lillooet along the north side of Seton Lake to Mission Pass, which is immediately above and to the north of the lakeside community of Shalalth. The road over the pass is also known as Mission Mountain, which is short for "Mission Mountain Road". Mission Creek lies on the north side of the pass, and is a tributary of the Bridge River, the lower reaches of which lie on the north side of the ridge, and which was the only road access into the upper Bridge River Country before the construction of a road through the Bridge River Canyon in the mid-1950s opened that region up to road access from the lower Bridge River valley and the town of Lillooet via the community of Moha. Most, or virtually all, of the ridge, is Indian Reserves, notably Slosh 1, under the administration of the Seton Lake Indian Band, and Bridge River 1, which is under the administration of the Bridge River Indian Band. Parts of the ridge's eastern end are in reserves controlled by the Lillooet Indian Band, including its final spires above Lillooet, which were dubbed St. Mary's Mount by the Reverend Lundin Brown in the 1860s, though that name never stuck and is ungazetted.
Hauser Dam is a hydroelectric straight gravity dam on the Missouri River about 14 miles (23 km) northeast of Helena, Montana, in the United States. The original dam, built between 1905 and 1907, failed in 1908 and caused severe flooding and damage downstream. A second dam was built on the site in 1908 and opened in 1911 and comprises the present structure. The current Hauser Dam is 700 feet (210 m) long and 80 feet (24 m) high. The reservoir formed by the dam, Hauser Lake, is 25 miles (40 km) long, has a surface area of 3,800 acres (1,500 ha), and has a storage capacity of 98,000 acre-feet (121,000,000 m3) of water when full.
