Category: Rock Run
Rock Run Water Tests 8-31-23
Here’s the water test results for August 31, 2023:
Air Temperature: 68°F
Water Temperature: 60.5°F
Linn Run Gauge: 1.85′
Linn Run Dischrge: 9.65 ft³/sec
pH: 7.1
Alkalinity: 8.2
Rock Run Water Tests 7.29.23
Citizen Scientists were met with a downpour for monthly water tests at the mouth of Rock Run on July 29. The (much welcome) rain forced a quick sample collection and tests conducted in the pavilion at Adams Falls.
The results:
Air Temperature: 68°F
Water Temperature: 63.5°F
pH: 7.0
Alkalinity: 6.7
Linn Run Gauge: 1.85′
Linn Run Flow: 9.65 ft³/sec
Despite the hottest day of summer on the previous day, Rock Run flows at a trout healthy 63.5 degrees.
Rock Run Water Tests For June
Monthly water tests were conducted at the mouth of Rock Run on Saturday, June 3.
Water Temperature – 57.5°F
Air Temperature – 66°F
pH – 7.2
Alkalinity – 6.1
Linn Run Gauge – 1.65′
Linn Run Discharge – 3.54 ft³/sec
Hot, dry weather has come early to the Laurel Highlands this year, however, there was a lower flow recorded in June of 2020 when the Linn Run gauge was at 1.42′. Some rain would be nice though.
Rock Run Water Tests 4-29-23
Here’s the results of water quality tests at the mouth of Rock Run on April 29, 2023.
Air Temperature: 54°
Water Temperature: 48°
Linn Run Gauge: 1.97′
Linn Run Discharge: 15.5 ft³/sec
pH: 7.45
Alkalinity: 5.0
Rock Run Water Test Results April 2023
Here’s the results of water quality tests at the mouth of Rock Run
on April 2, 2023.
Air temp: 30°F
Water temp: 41°F
Linn Run Discharge: 20.6 ft³/sec
Linn Run Gauge: 2.09
pH: 7.7
Alkalinity: 3.3
Flow: med/high and clear
Rock Run Water Tests March 2023
Monthly Rock Run Water Tests 2-25-23
It was a cold morning as the FTTU citizen scientists conducted monthly pH and alkalinity tests with frozen hands.
We arrived to find even more trees and branches down over the stream.
Air Temp – 28° F
Water Temp – 37.5° F
pH – 7.3
Alkalinity – 3.4
Linn Run Discharge – 21.1 ft³/sec – Medium High
Rock Run Water Tests February 2023
“If a tree falls in the forest, and no-one is there to hear, does it make a sound?”
The answer is “Yes”, and a pretty loud one too when this one came crashing down roots and all across Rock Run, probably during high winds from the storm on 1/25/23.
Results of water tests 1/29/23
Water Temperature: 38.5°
Air Temperature: 38°
pH: 7.8
Alkalinity: 3.8
Linn Run Gauge: 1.94′
Rock Run Water Tests 1-1-23
The first of the year brings some snow but warming temperatures.
Air Temperature – 37°F
Water Temperature – 34.5°F
Linn Run Gauge – 1.81 ft.
pH – 7.5
Alkalinity – 4.3 ppm
Final Rock Run Water Tests For 2022
FTTU Citizen Scientists wrapped up monthly water tests at the mouth of Rock Run for 2022. After a few months of low water, The flow was at its highest since April. Readings showed pH at 7.4, and Alkalinity at 5.5. Air temperature was 50° and water temperature was 43°. Linn Run gauge was at 2.03 ft. and discharge was 16.3 ft³/sec.
Averages over the 12 months of 2022 were 7.55 pH and 6.85 alkalinity. Alkalinity was down a bit from 2021 but average flow was a little higher. Those two things go hand-in-hand. When flow is up, alkalinity goes down. Overall averages show significant improvement and slow but steady progress since we started doing monthly tests in 2017. Alkalinity that year was 5.9 and pH was 6.47.
The pH and alkalinity chart for 2022 can be seen here – pH Chart 2022
Rock Run Water Tests for November
Water quality tests for November:
Air Temperature: 42° F
Water Temperature: 47.5° F
pH: 7.5
Alkalinity: 12.4
Linn Run Gauge: 1.46
Linn Run Flow: 1.9 ft³/sec
A splash of rain brought water levels up a bit but alkalinity also went up. Maybe recent addition of limestone has helped.
