The NHD version I'm using comes from the USFS Hydrology layer. It show the wetlands ending just east of where 97th Ave NE would be if it was extended through the park. Using the Maxar Premium background layer, you can see the difference in the tree color. The lighter green is in the wetlands while the darker green that extends to 95th is not. Feel free to change it. While I used to live next to Gas Works, I never spent any time in Yarrow Bay.

I noticed that no one as added in trails in the park. The link you provided wasn't clear if there were tails there or not.

I rolled back your changeset. (There is a feature in JOSM, a somewhat more advanced editor, that allows for reverting changeset.) According to the National Hydrography Dataset (NHD) there is a wetlands covering the entire area including the park. I'm in Skagit county and have been working with a hydrology layer for the past few months. There are areas that I wouldn't have expected to find a wetlands. It maybe their definition of wetlands that causes the confusion.

The current NHD has a slightly different coverage than what we have mapped but not a significant difference.

#TIP: Instead of deleting an object just fix the tags and geometry which will save the history of an object. Since you added the feature it's not a big deal. Just wanted you to be aware we do keep the history of an object.
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Published using OSMCha: https://osmcha.org/changesets/101415854

I usually don't connect areas with well mapped sidewalks to the street except at crossings.
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Published using OSMCha: https://osmcha.org/changesets/101374458

Is it possible that the park boundaries extend into the lake? I know that no uncommon for State Parks.
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Published using OSMCha: https://osmcha.org/changesets/101355832

Why are you doing this unapproved mass edit. State isn't need in the address since a simple geospatial edit provides the state. Please revert your edit.
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Published using OSMCha: https://osmcha.org/changesets/101452565

Thanks for the updates. Do you know if that residential neighborhood is still under construction or are people living there now? The area was tagged as a construction area 9 months ago.

#TIP: Just correct the address on the building instead of removing it. Can you add the correct address to the building?
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Published using OSMCha: https://osmcha.org/changesets/101220132

#TIP: The access=private tag on the gate wasn't needed since the road was tagged as access=private. But it doesn't do any harm either.
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Published using OSMCha: https://osmcha.org/changesets/101204491

#TIP: The building already contained the address, you could have add the business to the building outline. That's assuming it take up the entire building.
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Published using OSMCha: https://osmcha.org/changesets/101141511

Ideally the private access should be on the service road not the gate.
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Published using OSMCha: https://osmcha.org/changesets/101066794

Runways for model planes have their own set up tags although probably not in the editor since there aren't many. I even added one - which is no longer there unfortunately. Check out sport=model_aerodrome for help editing. Let me know if you need assistance.
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Published using OSMCha: https://osmcha.org/changesets/101067219

#TIP: square the house but selecting the outline then just type a "q"
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Published using OSMCha: https://osmcha.org/changesets/101012969

#TIP: Square buildings by selecting the outline then just type a "q"
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Published using OSMCha: https://osmcha.org/changesets/101010734

The tactile_paving tag should be added to a node where where the actual pad is located, not to the street. It's easier to do using the editor. I'll fix this one.
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Published using OSMCha: https://osmcha.org/changesets/100972736

Thank you for your edit. I reviewed your work and it looks good.
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#REVIEWED_GOOD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/100938526

#TIP: Use a slightly more descriptive changeset comment.
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Published using OSMCha: https://osmcha.org/changesets/100928355

#TIP: try to match the aerial imagery. It will save someone time from having to fix this.
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Published using OSMCha: https://osmcha.org/changesets/100928297

Question about the new residential road that connects to N 40 and W Wernett Rd. An embankment is included with the street. Typically embankments are used for flood control. Are you sure there is an embankment here?
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Published using OSMCha: https://osmcha.org/changesets/100929850