DSP Temp sensors show trout like temps all the way to 88th Ave.

After two summers, DTU temperature sensors show trout friendly water temperatures.

Amateur analysis by John Davenport, Chair of DTU DSP Temperature Sensing.

Interesting results from this graph and fishing in the Denver South Platte this summer indicate:

  1. During runoff the temperature out of Chatfield was nice and cool. Clear Creek just upstream of 88th Ave was adding cool water to the Denver South Platte.
  2. As soon as runoff stopped, 88th Avenue and Cuernavaca both got warmer but stayed about the same.  Then in August 88th Ave got about 4 degrees warmer than Cuernavaca.
  3. Chatfield warmed up because flows were cut from the dam in mid September. At that point the temperature at Chatfield matched that at 88th Ave about 30 miles away.
  4. Diurnal swings (day-night) in temperature and available deep water could be what keeps the Denver trout happy. The trout seek out cool (below 75 degree) temperatures for only a few hours a day. With good deep habitat this is no problem for them. This probably explains why there are happy, healthy, swiftly growing trout between Chatfield and Confluence Park but few found toward 88th Ave where the South Platte flattens out and cool channels are minimal.
  5. That precipitous 20 degree drop in mid May was the storm of baseball sized hail that destroyed my roof.

These fish caught during the temperature sensor readings appear quite healthy and well fed.