Hi Chris,

That's a green sweat bee, a good pollinator and you have given it a great place to raise it's young.  Most of our bees are ground dwellers and keeping some clear ground is important so they can dig in as it were.  They like sandy soil and it looks like your soil is sandy.

Some of them are green or blue.  They usually have a bright metallic head and thorax and black and yellow striped abdomens.   Lucky you.  No joke.  We need pollinators and pollinator habitat.  

Here is a link to the bee society in Washington with a number of native bees.  Many are ground dwellers, especially bumble bees.

https://www.wanativebeesociety.org/post/seven-native-bees-to-know-in-washington-state

This next link tells you what type of flowers, pollen, etc. bees like:  https://www.nwcb.wa.gov/pdfs/PacificLowlandrx8.pdf

If you have further questions, please contact us again.