A new year of testing began at the mouth of Rock Run on January 5. The final numbers from 2019 showed an improvement in average alkalinity from 5.3 in 2018 to 6.2 in 2019.
The flow was moderately high and clear with some fresh snow on the ground.
Air Temperature: 27 degrees F
Water Temperature: 37.5 degrees F
Linn Run Gauge: 2.38
Beautiful but cold, would describe conditions at the mouth of Rock Run this month as a light coating of snow greeted the testers.
Air Temperature – 29 degrees F
Water Temperature – 35.5 degrees F
pH – 6.8
Alkalinity – 8.2
Linn Run Gauge Height – 1.88
Linn Run Discharge – 14.8
Leaves are falling, the sun is low on the horizon, trout are on the move and taking up spawning positions. Here’s the numbers from Rock Run for November 2019.
Air Temperature – 46 degrees F
Water Temperature – 43.5 degrees F
Linn Run Gauge – 1.47
pH – 6.6
Alkalinity – 12.8
pH is steady, alkalinity is still good at 12.8.
Here’s the numbers taken October 2, 2019
Air Temperature – 76 Degrees F
Water Temperature – 65.5 Degrees F
pH – 6.7
Alkalinity – 15.8
Linn Run Gauge – 1.35
Linn Run Discharge – 1.95
Alkalinity numbers have spiked upwards since limestone was added in August. Could it be from the limestone more than 2 miles upstream, or is it just from lack of rain and low flow, or maybe both?
This month’s flow was the lowest recorded in the 2 years we have been doing the monthly tests.
If you look at the monthly photos, you will notice more and more black rocks starting in July. These rocks were probably flipped over from high flow from heavy rain in June and July. Click the link RR PH and Alkalinity 2019 for the results from the past year.
Flow goes down, alkalinity goes up. Here’s the Rock Run numbers for September 2109 (taken 8-31-19).
Lowest flow measured so far in 2019.
Air Temperature – 66 degrees F
Water Temperature – 61.5 degrees F
Linn Run Gauge – 1.44
Linn Run Discharge – 3.03
pH – 6.6
Alkalinity – 9.9
Flow – Low and Clear
Last Rain – 8-28-19
Here’s the numbers for our monthly water testing at the mouth of Rock Run.
Air Temperature: 76 degrees F
Water Temperature: 62 degrees F
Linn Run Gauge: 1.73
Linn Run Discharge: 5.84
Alkalinity tends to improve when the flow goes down. This was the lowest flow on our testing days for the year by the Linn Run gauge.
Check out the results from 2018-2109 here – RR Alkalinity.
Here’s the results of our monthly water tests at the mouth of Rock Run for June 2019.
Air Temperature: 64 Degree F
Water Temperature: 55.5 Degrees F
Linn Run Discharge: 21.1
Linn Run Gauge: 1.98