Category: Rock Run
Rock Run Water Tests 3.2.24
High flow today on Linn Run and Rock Run after heavy rains on February 29th. The Linn Run gauge bumped up again today with rain this morning.
It’s predictable, flow goes up, alkalinity goes down.
Air Temperature – 45°F
Water Temperature – 42.5°F
pH – 6.7
Alkalinity – 3.2
Linn Run Gauge Height – 2.3′
Linn Run Flow – 35.3 ft³/sec
Rock Run Water Tests for February
Water test results for February:
Water Temperature: 38° F
Air Temperature: 30° F
Linn Run Gauge: 2.08′
Linn Run Discharge: 24.2 ft³/sec
Flow: Med/High and clear
pH: 6.3
Alkalinity: 3.6
Alkalinity goes down with higher flow. This time from snow melt.
Rock Run Water Tests January 2024
The first monthly water tests at the mouth of Rock Run for 2024 were actually done on December 30, 2023.
Just a hundred yards or so below the test site rain changed to snow and began collecting in the tree tops and leaf litter. Winter is here!
Water Temperature – 39.5° F
Air Temperature – 32° F
pH – 6.8
Alkalinity – 6.0
Linn Run Gauge Height – 2.04′
Linn Run Discharge – 19.9 ft³/sec
Rock Run Water Tests 12.2.23
Recent rains have pumped up the volume of Rock Run on this Saturday, the final water test of 2023.
Air Temp – 53° F
Water Temp – 45.5° F
pH – 6.9
Alkalinity – 6.1
Linn Run Discharge – 16.1 ft³/sec
Linn Run Gauge Height – 1.98′
pH and alkalinity averages are down slightly from 2022, but considering a pH reading of 4.7 was recorded at this loctation in 2005 we can rest assured our limestone sand project has had a overall positive impact on the stream.
Click HERE to download the final pH chart for 2023.
Rock Run Water Tests 10.28.23
Water tests at the mouth of Rock Run were done on what may be the last “nice” Saturday of the year.
Air temp was 63° F
Water Temp – 55.5° F
pH – 7.1
Alkalinity – 10.0
Linn Run Gauge – 1.9 ft
Linn Run Discharge – 9.65 ft³/sec
Rock Run Water Tests 9.30.23
Here’s the results of water tests at the mouth of Rock Run.
Air Temperature: 59°F
Water Temperature: 56.5°F
Linn Run Gauge: 1.64′
Linn Run Discharge: 3.68 ft.³/sec
pH: 6.9
Alkalinity: 9.2
Flow: Low/Clear
The streams had decent flow, but we could use some rain to allow trout to move upstream to spawn.
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
