20011381 Ver 1_Email_20010227

PTR
Subject: PTR
Date: Tue, 27 Feb 200107:29:21 -0600
From: dave penrose <dave.penrose @ncmail.net>
To: John Dorney <j ohn.dorney @ nc mail. net>
CC: "jennifer.frye" <jennifer.frye @ncmail.net>
John,
I wanted to let you know that Jennifer and I did get a chance to look for aquatic life within the culvert at the
Larry's Homes facility on Leak Fork Creek. Anita asked us to do this as part of the PTR investigation. Our
observations pretty much validated our initial thoughts about aquatic life in culverts. It was noted during
my earlier investigation that water quality of Leak Fork Creek was pretty bad and that masked the instream
effects of the culvert to the benthos of this stream. During our survey on the 21 st of February we noted that
habitat conditions further deteriorated in the curverted reach of the stream. Habitat within the culvert was
dominated by shifting sand and it appeared that the particle size declined near the downstream end of the
culvert suggesting that there is some agredatation occurring due to the culvert. Some small leaf packs and
.gravel riffles were found at the upstream end of the culvert. The only benthos I found were tubificids
worms and the numbers of these organisms was very small. I suspect during high flows that the habitat
within the culvert is flushed clean. I did look for benthic organisms above the culvert in Leak Fork Creek
during this investigation and found lots of tolerant taxa including hydropsychid caddisfly and chironomids
on stable substrate material. A major difference between the culverted reach and other reaches of Leak
Fork Creek is the stability of the habitat. I also noted that there was no aufwuchs material on the substrate
within the culvert. I'm sure that the lack of light and unstable habitat within the culverted reach was
responsible for the lack of this material. Jennifer and I also looked at the unnamed tributary stream coming
into the property from under Highway 52. We found stoneflies, Limnephilid caddisflies and salamanders,
which are typically found in perennial streams. Hope this information helps.
lofl
2/27/2001 8:47 AM

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