ยง  566.    Dams and reservoirs.   1.   Dam sites, dams, reservoirs and
  flowage lands, including the right or privilege in connection  therewith
  and  the  capacity  thereof to impound, store or provide water for power
  purposes, shall be assessed in the assessing  unit  in  which  they  are
  situated.    If  the legal title to lands occupied or submerged by or in
  connection with a dam or reservoir for the storage of  water  for  power
  purposes, or adapted for such purposes because of the existence of a dam
  site or otherwise, is held by the state or a person other than the owner
  of  the  dam, reservoir or dam site and appurtenant rights, but the use,
  occupation or possession of such lands, or the right to use, occupy  and
  possess the same, is in such owner under an easement, right or lease for
  a  term  of  fifty  years or more or in perpetuity, then the interest of
  such owner shall be assessed as real property in the same manner  as  if
  such  owner  held  legal  title  to  such lands, except that explanatory
  notations showing the nature of the interest assessed shall be added  to
  the description of such lands.
2.    The classification of any interest enumerated in subdivision one
  hereof as real property shall not be affected (a) by  any  provision  of
  the  agreement  under  which the same is created or held or by reason of
  the fact that the water which is or may be impounded is used in  another
  assessing  unit for the development of power or (b) because of nonuse of
  the dam site.
3.  This section shall not apply to the water  supply  system  of  any
  municipal corporation.
Structure New York Laws
Article 5 - Assessment Procedure
Title 4 - Miscellaneous Provisions
561 - Payments in Lieu of Taxes; Change of Assessment; Effective Date.
561-A - Payments in Lieu of Taxes; Change of Assessment; Notice.
562 - Certain Property Used or Occupied by a Railroad.
563 - Real Property Used to Store Spent Nuclear Fuel.
564 - Privately-Owned Improvements on State Lands.
570 - Advisory Valuations of Utility Real Property.
572 - Employment of Experts in Connection With Assessments of Real Property.
574 - Information to Be Furnished by Recording Officers and Assessors.
575 - Assessor's Annual Reports.
575-A - Electric Generating Facility Annual Reports.
575-B - Solar or Wind Energy Systems.
576 - Assessment Under Cooperative Agreements.
578 - County Assistance Under Cooperative Agreements.
579 - Coordinated Assessment Programs.
581 - Assessment of Residential Cooperative, Condominium and Rental Property.
581-A - Assessment of Residential Real Property.
581-B - Assessment of Parcels Used for Residential Purposes and Registered as Family Day Care Homes.
582 - Valuation of Agricultural Structures.
582-A - Value of Lands and Structures Supporting Non-Residential Water Dependent Activities.