Chapter 20. Impounding Structure RegulationsRead Chapter 
-  Part I.Read allGeneral
 - Section 10
 - Authority
 - Section 20
 - General provisions
 - Section 30
 - Definitions
 - Section 40
 - Hazard potential classifications of impounding structures
 - Section 45
 - Hazard potential classifications based on low volume roadways.
 - Section 50
 - Performance standards required for impounding structures
 - Section 51
 - Special criteria for certain low hazard impounding structures
 - Section 52
 - Incremental damage analysis
 - Section 53
 - Special criteria for reduced SDF requirement for certain high hazard dams
 - Section 54
 - Dam break inundation zone mapping
 - Section 58
 - Local government notifications
 - Section 59
 - Reporting
 
-  Part II.Read allPermit Requirements
 - Section 60
 - Required permits
 - Section 70
 - Construction permits
 - Section 80
 - Alterations permits
 - Section 90
 - Transfer of permits
 - Section 100
 - [Repealed]
 - Section 101
 - General permit requirements for low hazard potential impounding structures
 - Section 102
 - Registering for coverage under the general permit for low hazard potential impounding structures
 - Section 103
 - Transitioning from regular or conditional certificates to general permit coverage for low hazard potential impounding structures
 - Section 104
 - Maintaining general permit coverage for low hazard potential impounding structures
 
-  Part III.Read allCertificate Requirements
 - Section 105
 - Regular Operation and Maintenance Certificates
 - Section 110
 - [Repealed]
 - Section 120
 - [Repealed]
 - Section 125
 - Delayed effective date for Spillway Design Flood requirements for impounding structures
 - Section 130
 - [Repealed]
 - Section 140
 - [Repealed]
 - Section 150
 - Conditional operation and maintenance certificate
 - Section 155
 - Extension of Operation and Maintenance Certificates
 - Section 160
 - Additional operation and maintenance requirements
 - Section 165
 - Agricultural exemption
 - Section 170
 - Transfer of certificates
 - Section 175
 - Emergency Action Plan (EAP) for High and Significant Hazard Potential impounding structures
 - Section 177
 - Emergency Preparedness Plan for Low Hazard impounding structures
 
-  Part IV.Read allProcedures
 - Section 180
 - Inspections
 - Section 190
 - Right to informal fact-finding proceeding or hearing
 - Section 195
 - Judicial review
 - Section 200
 - Enforcement
 - Section 210
 - Consulting committee
 - Section 220
 - Unsafe conditions
 - Section 230
 - Complaints
 
-  Part V.Read allDesign Requirements
 - Section 240
 - Design of structures
 - Section 250
 - [Repealed]
 - Section 260
 - Spillway design
 - Section 270
 - Principal spillways and outlet works
 - Section 280
 - Drain requirements
 - Section 290
 - Life of the impounding structure
 - Section 300
 - Additional design requirements
 - Section 310
 - Plans and specifications
 - Section 320
 - Acceptable design procedures and references
 - Section 330
 - Other applicable dam safety references
 
-  Part VI.Read allFees
 - Section 340
 - Authority to establish fees
 - Section 350
 - Fee submittal procedures
 - Section 360
 - Fee exemptions
 - Section 370
 - Construction Permit application fees
 - Section 375
 - Fee for coverage under the general permit for low hazard impounding structures
 - Section 380
 - Regular Operation and Maintenance Certificate application fees
 - Section 390
 - Conditional Operation and Maintenance Certificate application fees
 - Section 395
 - Simplified dam break inundation zone analysis fee
 - Section 400
 - Incremental Damage Analysis review fees
 
- DIBR
 - DOCUMENTS INCORPORATED BY REFERENCE (4VAC50-20)