Virginia Administrative Code › Title 4 - CONSERVATION AND NATURAL RESOURCES › Agency 50 - VIRGINIA SOIL AND WATER CONSERVATION BOARD › Chapter 20 - IMPOUNDING STRUCTURE REGULATIONS › Part II - Permit Requirements › Section 4VAC50-20-101 - General permit requirements for low hazard potential impounding structures

Current through Register Vol. 40, No. 24, July 15, 2024
Any impounding structure owner whose registration statement
					 is approved by the board will receive the following permit and shall comply
					 with the requirements in it. If the failure of a low hazard potential
					 impounding structure is not expected to cause loss of human life or economic
					 damage to any property except property owned by the owner, the owner may follow
					 the special criteria established for certain low hazard impounding structures
					 in accordance with
					 4VAC50-20-51 in lieu of coverage
					 under the general permit.
General Permit No.: Dam Safety 1
Effective Date: (Date of Issuance of Coverage)
Expiration Date: (6 years following Date of Issuance of
					 Coverage)
GENERAL PERMIT FOR OPERATION OF A LOW HAZARD POTENTIAL
					 IMPOUNDING STRUCTURE
In compliance with the provisions of the Dam Safety Act and
					 attendant regulations, owners of an impounding structure covered by this permit
					 are authorized to operate and maintain a low hazard potential impounding
					 structure. The owner shall be subject to the following requirements as set
					 forth herein.
1. The spillway design
				  of the owner's impounding structure shall be able to safely pass a 100-year
				  flood. When appropriate, the spillway design flood requirement may be further
				  reduced to the 50-year flood in accordance with an incremental damage analysis
				  conducted by the owner's engineer.
2. The owner shall develop and maintain an
				  emergency preparedness plan in accordance with
				  4VAC50-20-177. The owner shall
				  update and resubmit the emergency preparedness plan immediately upon becoming
				  aware of necessary changes to keep the plan workable.
3. The owner shall perform an annual
				  inspection of the impounding structure. The owner shall maintain such records
				  and make them available to the department upon request. The department also
				  shall conduct inspections as necessary in accordance with
				  4VAC50-20-180.
4. The owner shall ensure that the impounding
				  structure is properly and safely maintained and operated and shall have the
				  following documents available for inspection upon request of the department:
a. An operating plan and schedule including
				  narrative on the operation of control gates and spillways and the impoundment
				  drain;
b. For earthen embankment
				  impounding structures, a maintenance plan and schedule for the embankment,
				  principal spillway, emergency spillway, low-level outlet, impoundment area,
				  downstream channel, and staff gages; and
c. For concrete impounding structures, a
				  maintenance plan and schedule for the upstream face, downstream face, crest of
				  dam, galleries, tunnels, abutments, spillways, gates and outlets, and staff
				  gages.
Impounding structure owners shall not permit growth of
					 trees and other woody vegetation and shall remove any such vegetation from the
					 slopes and crest of embankments and the emergency spillway area, and within a
					 distance of 25 feet from the toe of the embankment and abutments of the
					 dam.