Trenchless Technology

OCT 2018

Trenchless Technology is the premier communications vehicle for the trenchless industry. Through our multiple platforms, readers receive insights into the trenchless industry, as well as keep connected to the latest news, products and projects.

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74 T R E N C H L E S S T EC H N O LO GY O C TO B E R 2018 unknown bends, as there were no as- builts for the pipelines. The original plan was to make two passes of each pig , to clean out each of the twin mains. However, after the successful pass of the irst swab pig , the conclusion was that one of each style of pig would sufice. The cleaning of the twin pipelines was completed successfully after the two passes of pigging were completed. As part of the project installations of the pig launching stations, the dual transmission mains were also un- manifolded to allow for continued water treatment when one of the mains was down for cleaning or maintenance. This new capability will assist with extending the life of this linear asset and to better manage the City 's water demands. The results of the water main cleaning provided a great return on investment that will also assist with the continued use of these linear assets. The water pressure returned to operating pressures of 80 psi , back down from 150 psi . Water production capacity at the treatment plant increased from 800,000 gpd to 3 million MGD. This increase has allowed the City to consider an opportunity to sell excess water supply capacity to other communities in the Region. In addition, plant operation during the high demand season has decreased from 24 hours per day to eight hours per day, helping to conserve energy and wear and tear on the water treatment plant equipment. The water main was found to be in such good shape, that it surpassed any remaining useful life expectation. Mixing processes have also been optimized thanks to the increase of process low at the plant providing more eficient chemical usage. The continued maintenance plan of periodic cleaning , cost savings and additional potential revenue will provide continued and uninterrupted service for years to come for the City of De Soto. Lisa S. Douglas, P.E.,ŝƐǀŝĐĞƉƌĞƐŝĚĞŶƚŽĨ ƚŚĞǁĂƚĞƌƐĞƌǀŝĐĞƐĚŝǀŝƐŝŽŶŽĨƚŚĞĂƌLJůŽŶ tĂƚĞƌ 'ƌŽƵƉ &Žƌ ŵŽƌĞ ƚŚĂŶ ϭϱ LJĞĂƌƐ ƐŚĞ ŚĂƐ ƐƉĞĐŝĂůŝnjĞĚ ŝŶ ƉŝƉĞůŝŶĞ ĐŽŶĚŝƚŝŽŶ ĂƐƐĞƐƐŵĞŶƚ ƚĞĐŚŶŽůŽŐŝĞƐ ĂŶĚ ĐŽŶƐƵůƚŝŶŐ ĨŽƌďŽƚŚŐƌĂǀŝƚLJĂŶĚƉƌĞƐƐƵƌĞƉŝƉĞ Mark Wade, P.E., ŝƐ ƉƌĞƐŝĚĞŶƚ ŽĨ ƚŚĞ ůƵĞtĂƚĞƌ ^ŽůƵƚŝŽŶƐ 'ƌŽƵƉ ,Ğ ĐƵƌƌĞŶƚůLJ ƉƌŽǀŝĚĞƐ ƐĞŶŝŽƌůĞǀĞů ƚĞĐŚŶŽůŽŐLJ ĂŶĚ ƉƌŽũĞĐƚ ŵĂŶĂŐĞŵĞŶƚ ŽǀĞƌƐŝŐŚƚ ĨŽƌ Ă ŶƵŵďĞƌ ŽĨ ƉŝƉĞůŝŶĞ ĂƐƐĞƐƐŵĞŶƚĂŶĚƌĞŚĂďŝůŝƚĂƚŝŽŶƉƌŽũĞĐƚƐ ƉĂƌƚŝĐƵůĂƌůLJůĂƌŐĞĚŝĂŵĞƚĞƌĐŽŶǀĞLJĂŶĐĞ ƐLJƐƚĞŵƐƚŚƌŽƵŐŚŽƵƚEŽƌƚŚŵĞƌŝĐĂ P I P E C L E A N I N G

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