Lancet Clubtail (Phanogomphus exilis)
Netted and released
About 3-4 seen.

Common Baskettail (Epitheca cynosura)
Observed
More active later in the afternoon, possibly at least 20

Racket-tailed Emerald (Dorocordulia libera)
Photographed
About 8-10

Chalk-fronted Corporal (Ladona julia)
Observed
Abundant

Common Whitetail (Plathemis lydia)
Observed
Common

Dot-tailed Whiteface (Leucorrhinia intacta)
Observed
Abundant

Eastern Pondhawk (Erythemis simplicicollis)
Observed
Abundant

Elfin Skimmer (Nannothemis bella)
Photographed
I found at least one, possibly two but could have been the same individual. Seen not far behind the maintenance building at the base of the trail split. Where the Phoebe is nesting.

Four-spotted Skimmer (Libellula quadrimaculata)
Observed
Two

Frosted Whiteface (Leucorrhinia frigida)
Observed
Hard to approximate, very common

Slaty Skimmer (Libellula incesta)
Photographed
One, I'm basing this ID based on the limited pale base of femora, light tan face, dark marking under base of hindwing and timing.

Twelve-spotted Skimmer (Libellula pulchella)
Observed
One

Widow Skimmer (Libellula luctuosa)
Observed
One

Ebony Jewelwing (Calopteryx maculata)
Observed
One

Aurora Damsel (Chromagrion conditum)
Photographed
Two seen

Boreal Bluet (Enallagma boreale)
Netted and released
Approximately 5

Eastern Forktail (Ischnura verticalis)
Observed
A few seen

Fragile Forktail (Ischnura posita)
Observed
A couple

Emerald Spreadwing (Lestes dryas)
Netted and released
2-3 seen

Slender Spreadwing (Lestes rectangularis)
Photographed
Approximately 6 seen