Landcom Book 4 Maintenance - WSUD

Water Sensitive Urban Design
Book 4 | MAINTENANCE
Table of Contents
1 | Introduction 4
2 | Key Operational and Maintenance Issues
Identified By Stakeholder Local Councils 6
3 | WSUD Elements 8
3.1 Bioretention Basins 8
3.2 Constructed Wetlands and Ponds 9
3.3 Sedimentation Basins 11
4 | Life Cycle Costing 12
4.1 What are the Life Cycle Costs of WSUD Elements 13
4.2 How does the LCC of WSUD development compare
with that of conventional drainage infrastructure 17
5 | Monitoring and Maintenance of WSUD Elements 18
5.1 Performance Monitoring Requirements 20
5.2 Maintenance Requirements 21
5.2.1 Predictive maintenance 21
5.2.2 Regular inspection and maintenance 22
5.2.3 Bioretention mystems 22
5.2.4 Constructed wetlands and ponds 27
5.2.5 Sedimentation basins 31
5.3 Waste Management and Disposal 35
5.3.1 Dewatered silt 36
5.3.2 Filter media 36
5.3.3 Liquid waste (from dewatering activities) 37
5.3.4 Equipment requirements 37
6 | Construction Requirements 38
6.1 Staging 38
6.1.1 Stage 1: Civil construction (or functional installation) 40
6.1.2 Stage 2: Building phase protection
(or sediment and erosion control) 42
6.1.3 Stage 3: Operational establishment
(civil and/or landscaping) 44
6.2 Construction Tolerances 46
6.3 Construction Certification and Compliance 47
6.4 Filter Media Specifications 48
Appendix A – Construction Inspection and Sign off sheets 49
A.1 Bioretention Systems 50
A.2 Constructed Wetlands 58
A.3 Sedimentation Basins / Ponds 68
Appendix B – Regular Maintenance Checklists 75
B.1 Bioretention Basins 76
B.2 Constructed Wetlands 78
B.3 Sedimentation Basin 80
B.4 Ponds 82
Appendix C – Asset handover sheets 84
Appendix D – References 85
Book 4 | MAINTENANCE 3