Fish Screen for Pumping Water Through Ice

When flooding ice roads or supplying water for temporary camps, water is pumped from convenient sources found under ice that may be fish bearing. Back in 2011, the Department of Fisheries and Oceans collaborated with stakeholders to come up with a design criteria for  suitable fish screens that reduce the risk potential of injury or death to fish during the water extraction process and is a requirement under Section 30 of the Fisheries Act.  Accordingly, the lower risk potential to fish is based on the use of temporary water sources and the limited duration and frequency of water withdrawals at these sources; As well, the operational challenges were factors in the selection of the basket screen design.    

Robust design for hard use

Designed to fit in an 8 inch auger hole

Shallow Water Fish Screens

A northern mine asked us to design and fabricate four fish screens for their pumps to operate in relatively shallow creeks. To maintain compliance with the Department of Fisheries and Oceans regulations, the "approach velocity" from the underside of the screen has to be low enough to not disturb any organisms living in the creek bottom substrate while simultaneously ensuring that the peripheral approach velocity would allow a fry size fish of the weakest swimming species of fish found in the water being pumped to not be impinged on the screen during operations. 

For enhanced low flow, the manifold holes have nearly three times the open area of the the manifold intake opening. As well, the placement of the graduated holes helps ensure a more consistent even flow across the screen.

Low and sleek and stable

Stacked on their side and ready for shipping

Four "hard eyes" for lifting - rugged welded aluminum frame

A Universal Fish Screen for Multiple Sizes of Water Pumps

  A construction company client uses three different sizes and capacity of pumps, but did not want to purchase three separate fish screens. To solve this issue we designed a fish screen with an effective screen area that is compatible with the the flow capacity of the largest pump in his inventory, then found a source for cam-lock adapters that allows the use of the other two pump sizes with the same fish screen.
                                                                                                       A simple and cost effective solution

two, three or four inch pump with one fish screen

2 inch female to three inch male cam-lock adapter