(a) Except as provided in paragraph (b) of this section, every twelfth month following the date of the initial plan approval, the person owning, operating, or controlling a water, sediment, or slurry impoundment and impounding structure that has not been abandoned in accordance with an approved plan shall submit to the District Manager a report containing the following information:
- (1) Changes in the geometry of the impounding structure for the reporting period.
- (2) Location and type of installed instruments and the maximum and minimum recorded readings of each instrument for the reporting period.
- (3) The minimum, maximum, and present depth and elevation of the impounded water, sediment, or slurry for the reporting period.
- (4) Storage capacity of the impounding structure.
- (5) The volume of the impounded water, sediment, or slurry at the end of the reporting period.
- (6) Any other change which may have affected the stability or operation of the impounding structure that has occurred during the reporting period.
- (7) A certification by a registered professional engineer that all construction, operation, and maintenance was in accordance with the approved plan.
- (b) A report is not required under this section when the operator provides the District Manager with a certification by a registered professional engineer that there have been no changes under paragraphs (a)(1) through (a)(6) of this section to the impoundment or impounding structure. However, a report containing the information set out in paragraph (a) of this section shall be submitted to the District Manager at least every 5 years.
[57 FR 7471, Mar. 2, 1992]