(a) General rule. -- Except as specifically provided in subsection (b) of this section, a project sponsor who provides equipment, materials or services at no cost or at cost for a reclamation project or a water pollution abatement project:
(1) Is immune from liability for any injury to or damage suffered by a person which arises out of or occurs as a result of the water pollution abatement facilities constructed or installed during the water pollution abatement project;
(2) Is immune from liability for any pollution emanating from the water pollution abatement facilities constructed or installed during the water pollution abatement project unless the person affects an area that is hydrologically connected to the water pollution abatement project work area and causes increased pollution by activities which are unrelated to the implementation of a water pollution abatement project, provided that the project sponsor implements, operates, and maintains the project in accordance with the plans approved by the department;
(1) Nothing in this article shall limit in any way the liability of a project sponsor which liability results from the reclamation project or the water pollution abatement project and which would otherwise exist:
(C) For damages to adjacent landowners or downstream riparian landowners which result from a reclamation project or a water pollution abatement project where written notice or public notice of the proposed project was not provided.