This is DNR land, but according to the DNR the land is for scientific study/use by a school. Not military. While it may be used as a shooting range, that isn't what the DNR has designated it use for. Can you either remove it or correct it? The actual size of the parcel is much larger.

I changed it to building=house

Welcome to OSM. These streets are most likely service - they are not on the county's list of streets. Also one of the streets, near the pool, was duplicated. I made the changes.

Thanks for adding the healthcare tag. Too often it missed by new mappers. - One suggestion - use unabbreviated spelling of street names. We use the full spelling since software has a hard time unabbreviating which can cause confusion. I'll fix it.

reverted

The parks may be real, but the water features are not. When we see that combination it causes concern. I have know way of knowing if the parks are real. Because the water isn't I removed both.

I've removed most of your edits. Please only add features that can be verified on the ground. Check out https://blog.openstreetmap.org/2016/12/30/tips-pokemon-go/ for more information about editing for Pokemon and being a valued contributor.

A gate already exists on Pigeon Creek Road. BTW - gates are normally a node on a way. That tells routers to not proceed - unless allowed by the gate. I'm going to remove your gate since its a duplicate.

Is Summerwood a park a city or county facility. I couldn't find any mention. Also the land is owned by the HOA/Developer - so most likely a landuse=recreation_ground

Forest is for areas that companies use for logging. natural=woods are for areas like this. I changed it.

I just talked to a GIS rep for Snohomish County last week. They send new addresses to the Post Office as they happen. That doesn't help UPS and Fedex, but they must run into this problem all the time. I would stop in to their store fronts to make sure they know how to deliver to you. You could give them a link to OSM to show people where you are located.

Street names should be unabbreviated and the actual road looks more like a residential than a tertiary. I'm made the changes.

Is it really named Private Road or is it just not a city maintained road? Could it be a highway=service, service=driveway?

The footway is tagged foot=no. Did you mean that people shouldn't be walking on it? Usually a footway is for people with horse and cycle the two big options.

Only the building should outlined. Not the whole complex. Instead use landuse=residential along with the name.

Looks good. Two tips, spell out street names. OSM used full street names since software has a hard time unabbreviating names. Also, check out the wiki on opening hours. opening_hours=*

OSM uses full spellings on street names. It should be South 279th Street.

Thanks for adding the street. When adding streets and they don't appear on the imagery, use the pancake icon on the right to see if one is more current. I went ahead and made some adjustments to better align to the imagery.

A pier can be either a polygon or a way, but probably not both. See man_made=pier for more info.

Nice