Codorus (west branch) Creek, York County, 5/18/2015

lowkey

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Jul 17, 2014
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I had been looking forward to fishing the sulphurs on the Codorus all winter. But I was bitterly disappointed yesterday to find literally (and when I say literally, I don't mean figuratively) no trout rising on a favorite section of stream while the little yellow mayflies hatched without interference and in large numbers.

I was, and remain, dumbfounded.

Can anyone offer an explanation?
 
Chances are, if they were feeding, they were keyed in on the nymphs. They could have been focused on the spinners and were "waiting" for that to occur. Who knows. Their pea sized brain baffles me more times than I care to admit.
 
I am truly concerned for the Codorus. I observed an excellent spawn on this stream this past fall....at least several very nice trout on redds. However, they (whoever "they" are) have not been releasing water this entire spring season permitting ,instead, the lake to fill. The Codorus, IMHO, remains at an unhealthy "low level" for trout and insects alike. A lot of streambed exposed. Now if you observed a lot of sulphurs....great. However the lack of fish showing has been my personal experience this entire spring season while some other streams have fished very well.

There needs to be a minimal flow established if this stream is going to ever be a consistent fishery. Otherwise, it will continue to experience peak and valley years. It truly needs some friends.
 
Thanks for your responses. I have been baffled before at not catching fish which I always attribute to some mistake I'm making. But this was different. The sulphurs were coming off in droves but there were no trout breaking the surface. This went on for a good hour. I kept waiting for them to turn on but they never did. I did try a few subsurface patterns and never got a hit, but I have no confidence in my subsurface presentation. I'm almost strictly a dry fly fisher.

Now I have caught rising fish on a couple of earlier trips this year. And I did go upstream and manage to catch 2 dinks rising to the few remaining sulphurs. I also spotted 2 fry in 2 different pools which I sat by. So trout do still remain. I don't mean to start a panic....

I hope it is simply the low water levels....
 
It is probable that there already is a required minimum discharge requirement in the dam's permit.
 
OK, so the past six months or so have been one of the more unusual periods on the Codorus since it became a trout fishery. But some folks are getting carried away. Consider the following…

As for the water, let’s remember that the dam is managed as a cold water source for the paper mill downstream. The fact that they created trout habitat was just a fortunate byproduct. They are required to maintain a minimum flow, but that was established years ago - long before trout were ever even in the picture over there. They are well above that minimum flow, even now. While they are under no obligation to manage a trout fishery, they do so voluntarily and with great concern. It’s good PR for them, and they’ve certainly taken their lumps over the years in that category. They monitor the stream temps daily, and stepped up the flows in early May when the weather first got warm. But they’ve been trying to keep the lake full, despite very little rain and snow since last fall, so they’ll have cold water all summer. We’ll be glad for that later.

As for the fish, the low water is going to concentrate them in the deepest runs. When they’re bunched up like that they’re hard to even approach, let alone catch – that’s a lot of eyes in one place. And if they’re in the deeper faster runs, its not worth the effort to rise. They’re conditioned to bottom feed anyway because of the enormous scud population that’s there all year long. And if sulphurs are hatching in good numbers that’s a good sign, even if the trout aren’t taking them on top.

The fish I did manage to catch this year, and others I’ve heard about, all seemed perfectly healthy and normal. They’re just not easy – you need to stay low, move slowly and patiently, lengthen your casts and fish the bottom in deeper runs. If you’re looking for risers you might be out of luck, but the lack of precipitation is the only thing you can really blame. Sooner or later, things will return to normal.
 
Tom, thanks for your response. I believe you're right, that the low levels are keeping the fish down. I just had never witnessed trout ignoring a hatch like that. It's good to know the fishery is normal....
 
Based on my experiences with a regular to the Codorus and his reaction to the number of fish revealed by electrofishing, there are many more trout present in the stream than even some of the locals realize. I don't think you need to worry.
 
I get a look at the Codorus from the 116 bridge on a fairly regular basis and can tell it's been low. I haven't been on the stream since the winter months to fish it. The fish aren't easy and one can easily attribute lack of catch rates to low biomass. There isn't much stream cover for a fisherman, so you have to plan your moves accordingly. Great explanation on minimum flows, bug activity, etc. Even the lake isn't at "full pool" yet. Without appreciable precipitation in the coming months, the current state of Codorus could be what we're looking at for months to come.
 
Looked at the stream yesterday evening between 8:00-8:30. Curious to see what it looked like after the storm we had. It brought the level up somewhat but saw nothing hatching or rising. The stream had a mystical mist about it from the humidity and warm evening. The water level is back down to low today but more rain is expected this evening.
 
Agree that this stream has a lot more trout than usually meets the eye. It's a tough stream and often sends me home scratching my head.
 
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