River Diversion | Creek Bypass
Temporary diversion methods such as river diversion or creek bypass are used to redirect water from a stream or river and focus the flow to a designated portion of the river or creek to allow for construction activities to take place in a specific section of the water body. This can be projects such as integrity digs, pipeline installation or associated bank protection. As well, temporary diversion projects can often be deployed during the construction of detention ponds, dams, in-stream grade control structures, utility installation, including maintenance, that require working in waterways.
River diversion or creek bypass methods include temporary diversion channels, pump-arounds, piped or hose diversions, coffer dams, aqua-dams and other similar practices. The primary purpose of all temporary diversions are to provide safe construction access, protect water quality and aquatic life by redirecting upriver or creek flows around an active construction zone.
NCS Fluid Handling Systems Designers and Engineers consider a variety of options when selected and designing a temporary diversion method, which includes factors such as:
- Is a temporary diversion the correct choice for a particular project and will construction of the temporary diversion have greater environmental impact than if the project is constructed without a temporary diversion? ( A short project duration, such as bank erosion repair or pond maintenance, may consider alternative methods)
- Realistic estimation of project duration and time of year during which construction will occur.
- Size of water body, river, stream or creek and the anticipated flow rates during construction.
- Special consideration should be given to large streams with large tributary areas with higher flow rates or season swings of inflow water from rain and snow melt.
- All water quality or aquatic life conditions the waterway and additional protection or water filtration, such as sediment control.
- Surrounding land use, property ownership, and landowners to ensure all permits are in place, noise control is place and traffic management or impact. (for example, in a highly urbanized area with limited access, there may not be adequate space to construct a diversion system)
- Seasonal variations in stream hydrology (baseflow vs. peak flow).
- Amount of redundancy to be factored into design - probability of flood flows exceeding diversion capacity can lead to diversion failure so NCS Designers work with clients to manage and incorporate redundancy and backup pumping to consider variables such as rain events or up stream activity.
As noted above:
The NCS Fluid Handling Systems process starts with a comprehensive review of the site location, terrain and water services required.
Then Our engineering design team provides a comprehensive "Diversion Plan" or “Bypass Pumping Plan" with a job specific summary, providing all the project specific details.
These plans consider the river or creek flow, ground water conditions, and water table levels and if required filtration and disposal locations.
The Pumping plan provides both primary and standby pumping unit requirements with supporting topographical equipment locations as well as detailed AutoCAD drawing showing the plan pictorially.
The NCS team works closely with our clients and all government agencies to coordinate such items as fish movement activities.
Our custom pumping systems will include Department of Fisheries and Oceans-approved suction assemblies, and flexible and adaptable solutions for any terrain we may encounter.
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River Diversion and River Bypass
Water transfer systems may appear simple in nature at first glance however, the real work is in the preparation, planning and execution prior to pumping hydrotest water. Canada has some of the most stringent guidelines for pipeline construction and integrity in the world and in collaboration with owners and constructors, NCS Fluid Handling Systems plays an integral supporting role in project success.
In this picture the dedicated NCS Project management and technical team have installed a water withdraw supplying clean test water to pipeline Hydrotest in Western Canada.
But, long before NCS Fluid Handling Systems crews arrive the project management groups from our customers teams and the NCS Fluid Handling Systems Technical designers and Engineering coordinate key activities.
Items such as:
Water analysis ensuring test water suitability and establishing baseline so when test water is returned it is cleaner than the original source analysis.
Temporary Diversion License (TDL) and water meters in place ensuring that the requested amount of water on the TDL is withdrawn and returned.
Crossing agreements in place ensuring all stakeholders have been consulted and have granted access for temporary test water supply lines to cross land and existing utilities.
Water Filtration plan and system in place in when all pipeline hydrotesting is completed ensuring test water is all returned to source cleaner than originally withdrawn. Interesting note is that if test water was heated to prevent freezing during testing the water is cooled to source water temperature as it is released, preventing temperature shock to aquatic life or plants.
Fish screens on suction inlets ensuring that no aquatic life is affected.
FLHA such as - Safe entry procedures are followed with life line, access boat and life jackets mandated.
And much more.
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In Canada, pipelines are mainly constructed of steel, although plastic (HDPE) and aluminum are occasionally used in the construction of natural-gas distribution networks. Steel pipelines are formed by welding sections of pipe together. After welding steel pipe joints together, the seams are X-rayed to detect any flaws in weldment, the pipe is the coated and / or wrapped with a protective coating and / or cement and then is buried.
All pipelines, regardless of type, are inspected. NCS Fluid Handling Systems supports the important Hydrostatic pressure test. Hydrostatic testing is the process where the pipeline is pressured to a test pressure greater than the operating pressure, this pressure test is mandated before any pipeline is put into service. The NCS Hydrotesting support service may include the test water transfer for the pressure test, water filtration, suction inlet fish screens or specialized industrial water heaters during cold weather testing.
The Team at NCS Fluid Handling Systems is proud to be working to support the growth and expansion of the Canadian Energy Sector and Municipal infrastructure construction. But, equally as important as a Canadian owned and operated business everyone at NCS is proud to be doing it by keeping Canadians employed. This NCS Fluid Handling Systems group of dedicated project managers, technicians, designers and administrators has stayed together and grown over these past two and a half years by supporting each other as leaders, mentors and having each other’s back! Proudly they continue to grow the excellent service reputation the NCS Fluid Handling Systems name is synonymous with.
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Pump Parts, Repairs and Maintenance
NCS Fluid Handling Systems Fully equipped repair and maintenance shop that offers full service welding, machining and pump repairs.
Our repair and maintenance shops are open 7 days a week for pump repairs.
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