Diversion Structures

Control Flows and Maximize BMP Effectiveness

Provide flow control in conjunction with any of the other stormwater management offerings to mitigate potential issues associated with high flows and maintain the effectiveness of your water quality treatment unit or Best Management Practice (BMP). Diversion structures protect and increase the efficiency of BMPs by allowing only the water quality flow (treatment flow) to enter the BMP. Flow rates greater than the water quality flow are allowed to bypass the BMP.


Configure Product and Download Drawings

Model Diameter Download Drawings
JD-MH48 48
JD-MH60 60
JD-MH72 72
JD-MH84 84

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Model Width Length Download Drawings
JD-V466 4'-0" 6'-6" JD-4x6.5 JD-4x6.5

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How It Works

Stormwater enters the structure via the inlet pipe and encounters a weir. The weir height is set at a predetermined elevation, in order to direct the treatment flow (water quality flow) into a BMP. Jensen Water Resources diversion structures can be manufactured with an adjustable height weir, allowing for fine-tuning and setting the final weir elevation in the field as necessary. The weir crest is set at an elevation such that flow greater than the treatment flow overtops the weir and bypasses the BMP, thereby ensuring that the BMP operates efficiently and effectively, and that previously captured pollutants are not re-suspended.


  • Receive typical and site specific plan and profile drawings for all Jensen Stormwater System Units with engineer’s value estimates.
  • Leverage our readily available tools to support storage and runoff calculations, size our systems, and satisfy stormwater management goals.


  • Create competitive bids with quantified, specific information and pricing.
  • Get installation weights and guidance to support estimation of your installation effort.
  • No hidden installation requirements or costs.


  • Complete your projects on time with well constructable plans inherent into all Jensen Precast products for installations that are quick and easy.
  • Secure, safe delivery and timely setting of your stormwater management systems with our expert drivers and delivery personnel.
  • Gain peace of mind with our easy to maintain systems that require minimal upkeep and safe access post install.