Over the last week or so, I’ve been exploring the odonates at Emma Jones as the birding is very slow this time of the year. I’m quite a rookie with damsel and dragon flies, so I wouldn’t fully rely on the identifications made below. Here some samples …
Common Whitetail
Eight-spotted Skimmer
Widow Skimmer
Twelve-spotted Skimmer
This could be a Northern Spreadwing, but I’m not sure. Definitely a spreadwing which is actually a damsel fly.
And finally, a mating pair of Tule Bluet, another damsel fly.
Birdmeister's Blog 
Nice finds! Willamette Mission State Park has lots of good views of dragonflies too. Thanks for sharing!
The spreadwing above is a California Spreadwing, a very large spreadwing perching with its wings open. Thanks to Jim Johnson for the ID.