California Surveyors Forums

It is still a subdivision by submitting it as a Parcel Map. You are subdividing the 10 lots from the previous subdivision. Yes, they are within the laws, rules and regulations to make the ROW dedication a condition to acceptance.

By going through the parcel map process, a tentative parcel map will be required, with the incident planning commission public hearings, and staff recommended conditions. All in the guise of orderly development.
The lot merger (and lot line adjustment) procedure is an exemption to the provisions of the SMA, provided there is a local ordinance governing the administrative approval.
There may also be local provisions for a parcel map waiver, whereby the parcel map is waived, but the tentative parcel map is conditioned normally. Exhibits are recorded with an approval letter by the Clerk of the Board/Council, and dedications are handled by Grant Deed and acceptance by the local governing body.
Lot Mergers are normally an option when the proposed development is not overly complicated, and can be addressed through permit conditions.

Is a reversion to acreage map an option?

If the City or County you are dealing with has an ordinace allowing 'voluntary' merger ( 66499.20 3/4) I would recomment going that route, it's usually one 8 1/2X11" document from what I have seen.

If you do a parcel map under 6649920 1/2 then you need to comply with all of the applicable requirements of a subdivision. So, you may not be making more little pieces but you have to follow the rules as if you are.