Terraforming to water level

[KesavaKantha]

I am trying to terraform the z axis of my parcel by using the bulldozer to lower the land, but the farthest it will go down is 40 (z axis). Are some parcels simply not able to be terraformed lower? (I'm trying to get the z axis to 20)

[Coffee Pancake]

Terraforming limits:

• Most mainland can be raised/lowered by 4 meters (+/-).
• Some mainland cannot be terraformed, including: Bay City regions, Boardman, Brown, De Haro, Horizons, Kama City regions, Nautilus City regions, Nova Albion regions, and Shermerville regions.
• Linden Homes do not allow terraforming.
• A few, very old mainland Regions like Da Boom have a terraform range of 40 meters (+/-).
• Estate (private island) terraformability is settable to a maximum of 100 meters (+/-) by the estate owner or managers.

http://wiki.secondlife.com/wiki/Limits

[KesavaKantha]

Thank you so much for this detailed response. I am so grateful for your help!