Fly Tying Mondays Resume on December 5th.

We will get another season rolling on Monday December 4th at TC Outfitters. From 7 pm to 9 pm.

...new members are always welcome.

A box full of flies!

A box full of flies!
...and fly fishers

Wednesday, March 2, 2016

AERATION UPDATE – MARCH 1, 2016



Despite our best efforts and a significant amount of time and energy put into the project by ACA staff, our aeration program for 2015/16 has not produced the results we were hoping for. As stated previously, because of criminal liability issues associated with Sec 263 of the Criminal Code, we changed our aeration program this winter from the usual surface aeration to a sub-surface diffuser system. We hoped that by using the sub-surface diffuser system, we would be able to continue to provide enough dissolved oxygen (DO) into the water column to maintain fish over the winter, while at the same time containing the opening in the ice created by the aeration, through the installation of a dock and chain-link system.
Our original plan was to aerate only a portion of the lakes this winter to test the sub-surface diffuser system; however, at the request of the Minister of Environment and Parks, we proceeded with the implementation of aeration systems at all the lakes we would normally aerate. Fortunately, Alberta Environment and Parks was able to take over aeration using surface aerators at two locations, along with two municipal governments and one private individual. You will note in the table below, with the participation of these groups, five of the fifteen lakes that ACA would normally aerate over winter were aerated using surface aeration. 
Unfortunately, we experienced more difficulties with the sub-surface diffusers than we had expected. Containing the hole created in the ice within the dock system proved to be a difficult task, particularly with the warm winter conditions we experienced this year. As a result, in many instances we were forced to reduce the amount of air being pumped by the diffusers into the water column. While this change allowed for the hole to be contained, it appears in most cases it reduced the amount of oxygen entering into the water column to the point at which the aeration was ineffective at maintaining adequate DO levels.
We are currently working with Alberta Environment and Parks to resolve the aeration issue to ensure that surface aeration can be re-implemented at all lakes in 2016/17.


The table below provides an update as to the aeration system and effectiveness at each lake as of March 1, 2016.
NAME
AERATION SYSTEM
COMMENTS
NORTHWEST REGION


Cecil Thompson Pond
MD surface aeration
DO level good. Good potential for fish to survive.
East Dollar Lake
ACA diffuser
DO low. Limited potential for fish survival. Dead trout have been observed.
Figure Eight Lake
AEP surface aeration
DO level good. Good potential for fish to survive.
Spring Lake  (Grande Prairie)
Fall aeration only
This lake is normally only aerated in the fall. DO level good. Good potential for fish to survive.
Sulphur Lake
AEP surface aeration
DO level good. Good potential for fish to survive.
Swan Lake (Grande Prairie)
County surface aeration
DO level good. Good potential for fish to survive.
CENTRAL REGION


Beaver Lake
diffusers shutdown Feb 5
DO becoming a concern. Potential for some fish loss.
Birch Lake
No aeration
DO still ok. Good potential for fish survival.
Fiesta Lake
diffusers shutdown Jan 28
DO low. Limited potential for fish survival. Dead minnows have been observed.
Hansen Reservoir
No aeration
Low DO levels prior to equipment being installed as a result aeration was not initiated. Limited potential for fish survival. 
Ironside Pond
Diffusers shutdown Feb 5
DO becoming a concern. Potential for some fish loss.
Mitchell Lake
Diffusers shutdown Jan 18
DO still ok. Good potential for fish survival.
Millers Lake
ACA diffuser
DO low. Limited potential for fish survival. Dead trout have been observed.
Muir Lake
ACA diffuser
DO becoming a concern. Potential for some fish loss.
Spring Lake (Stony Plain)
Private surface aeration
DO level good. Good potential for fish to survive.
SOUTH REGION


Coleman Fish and Game Pond
ACA diffuser
DO are a concern. Potential for fish loss.
  

Please contact TODD ZIMMERLING at todd.zimmerling@ab-conservation.com or 780-903-3377 with any questions or concerns. 


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