Rock Creek, Muncaster Mill Road

Map of All SitesWater Quality Monitoring


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site within its watershed

This site, one of the first sites monitored by ANS, is upstream of Muncaster Mill Road, in Rock Creek Stream Valley Park in Derwood, Maryland. It is also in Montgomery County's Upper Rock Creek Planning Area. Rock Creek at this point is a third order stream, meaning smaller tributaries flow into it. Streamside cover includes trees, shrubs, and grasses. Downstream of this site is the Intercounty Connector and Lake Needwood.

site 6 chart Rock Creek at Muncaster Mill Road

Organisms Found in 2010

Ameletidae (Ameletus mayflies)
Baetidae (small minnow mayflies)
Chironomidae (midges)
Corbiculidae (Asiatic clams)
Corydalidae (dobsonflies/fishflies)
Decapoda (crayfish)
Dryopidae (long-toed water beetles)
Elmidae (riffle beetles)
Gomphidae (clubtail dragonflies)
Heptageniidae (flatheaded mayflies)
Hydropsychidae (common netspinner caddisflies)
Isonychiidae (brushlegged mayflies)
Perlodidae (Perlodid stoneflies)
Philopotamidae (fingernet caddisflies)
Simuliidae (black flies)
Uenoidae (Uenoid casemaker caddisflies)


Low water, Fall 2007


Glenn Welch and Gretchen Schwartz collecting, Winter 2008. (Photo by Liz Jones)

Charlie Dorian, Gretchen Schwartz, and Peter Viechnicki identify macroinvertebrates.
(Photo by Liz Jones)


Enjoying a much-needed coffee break!  (Photo by Liz Jones)


Erosion on left bank, Fall 2007

6 - Whirligig beetle found  July 2008

Whirligig beetle found, July 2008 (Photo by Charlie Dorian)

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