The St. Leonard Creek Watershed is the second largest in Calvert County, with only Hunting Creek Watershed being larger. St. Leonard Creek Watershed is 18,973 acres and stretches from Port Republic all the way to the Appeal Landfill.
2018 Calvert Stream Survey
Collection Site Date Teacher School Score Qual Rating Caddisflies (except net spinners) Mayflies Stoneflies Water Snipe Flies Riffle Beetles Water Pennies Gilled Snails Dobsonflies (Hellgrammites) Fishflies Crane Flies Damselflies Dragonflies Alderflies Common net spinning Caddisflies Crayfish Scuds Aquatic sowbugs Clams Mussels Aquatic Worms Black Flies Midge Flies Leeches Lunged Snails # of species found Flag Pond 12/4/2018 Dembrow SMS 13 Fair x x x x x 5 Flag Pond 12/4/2018 Dembrow SMS 14 Fair x x x x x x 6 Flag Pond 12/11/2018 Gallihugh MCMS 18 Good x x x x x x x x x 9 Flag Pond 12/11/2018 Gallihugh MCMS 18 Good x x x x x x x x 9 Flag Pond 12/11/2018 Gallihugh MCMS 16 Fair x x x x x x x x 8
2019 Calvert Stream Survey
Collection Site Date Teacher School Class Period Score Qual Rating # of Bags Caddisflies (except net spinners) Mayflies Stoneflies Water Snipe Flies Riffle Beetles Water Pennies Gilled Snails Dobsonflies (Hellgrammites) Fishflies Crane Flies Damselflies Dragonflies Alderflies Common net spinning Caddisflies Crayfish Scuds Aquatic sowbugs Clams Mussels Aquatic Worms Black Flies Midge Flies Leeches Lunged Snails # of species found Flag Pond 11/15/2019 Gallihugh MCMS 1A 8 Poor 4 x x x x 4 Flag Pond 11/15/2019 Gallihugh MCMS 2A 15 Fair 4 x x x x x x x 7 Flag Pond 11/15/2019 Gallihugh MCMS 3A 11 Fair 4 x x x x x 5 Flag Pond 11/18/2019 Gallihugh MCMS 1B 11 Fair 4 x x x x x 5 Flag Pond 11/18/2019 Gallihugh MCMS 2B 9 Poor 4 x x x x x 5 Flag Pond 11/18/2019 Gallihugh MCMS 3B 5 Poor 4 x x 2
2020 Calvert Stream Survey
Collection Site Date Teacher School Score Qual Rating Caddisflies (except net spinners) Mayflies Stoneflies Riffle Beetles Gilled Snails Dobsonflies (Hellgrammites) Crane Flies Damselflies Dragonflies Common net spinning Caddisflies Crayfish Scuds Aquatic sowbugs Aquatic Worms Black Flies Midge Flies Leeches Lunged Snails # of species found Flag Ponds 12/9/2020 Gallihugh MCMS 13 Fair x x x x x x 6 Flag Ponds 12/9/2020 Gallihugh MCMS 14 Fair x x x x x x 6 Flag Ponds 12/9/2020 Gallihugh MCMS 14 Fair x x x x x x 6 Flag Ponds 12/9/2020 Gallihugh MCMS 12 Fair x x x x x 5 Flag Ponds 12/10/2020 Gallihugh MCMS 14 Fair x x x x x x 6 Flag Ponds 12/10/2020 Gallihugh MCMS 16 Fair x x x x x x x 7 Flag Ponds 1/21/2021 Sison CCS 8 Poor x x x x 4
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