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River: South Platte - Deckers

lots of algae

Post By: CAHC      Posted: 6/28/2018 2:39:50 PM     Points: 0    
I fished the South Platte Tuesday below Pine Creek Road, and then moved up to just below Deckers. There was surface activity early, but I couldn't tempt them much. Below Pine Creek Road the water was clear, with very little moss/algae. Near Deckers the algae was so thick it was a struggle to keep the nymphs clean for more than one cast, and the water was almost murky. Anyone have an idea why the conditions would be so different just a few miles apart on the same river, with less moss/algae downstream?
 Reply by: esoxrocks      Posted: 6/29/2018 8:40:35 AM     Points: 2486    
That section is often so thick with fishing company sometimes its difficult to SEE the water....maybe its from everyone stirring up the bottom.
 Reply by: 3wayfisha      Posted: 6/29/2018 1:25:20 PM     Points: 194    
its definitely from the low and hot water

Thankfully they just bumped..but be very careful and courteous fishing in these hot rivers right now, the stress of fighting fish could easily kill them even if they swim off fine. Most fly shops arent even guiding on hot days anymore
 Reply by: brookieflyfisher      Posted: 6/29/2018 4:34:49 PM     Points: 6121    
Reservoirs tend to export nutrients and depress water temperatures downstream of the dam.

Immediately below the dam productivity is hindered by low temperatures. But if you get too far downstream all the nutrients are used up by the plants, bugs, and fish.

So below every dam there's a goldilocks zone of high nutrients and ideal temperatures that cause a lot of primary productivity that helps to feed insects, which then feed trout. Deckers is in that goldilocks zone, and is one of the reasons why it's always been a good fishery.

There's a lot more to it than that, but that's the best I can do in a short post. If you want a more technical explanation, look up "Stanford and Ward 1983" and "Williams and Wolman 1984". Both ought to be free, if dense, reads.
 Reply by: Abel1      Posted: 7/1/2018 7:24:51 PM     Points: 198    
Went along the river last Fri. night 6pm and saw 2 fisherman from Nighthawk to Deckers. Came home last night the same time and there were lots of campers near Nighthawk but again very few guys on the water. Kind of nice to see it getting a break. It's no wonder those fish are tough to catch as they have probably seen everything by now. Lots of pressure on the camping area but they have little affect on the fishing.