Maintenance Agreements

The County also requires that a stormwater facilities maintenance agreement between the County and the owner be executed for all stormwater facilities to ensure that the facilities will be maintained in accordance with the O&M Manual.
A copy of the standard County Stormwater Facilities Maintenance Agreement (Appendix A) for owner review is provided below.

Southeast Metro Stormwater Authority Boundary

Appendix A shall be used for all County projects requiring an O&M Manual, even if the project is within the boundaries of the Southeast Metro Stormwater Authority. The remaining County templates are for use outside of SEMSWA’s boundary.Your County case engineer can assist you in determining if your project is within SEMSWA’s boundary.

The O&M Manual shall be submitted for acceptance and shall be prepared by the design engineer and certified by the owner and design engineer. Except for Appendix A below, if your site is within SEMSWA’s boundary, please use SEMSWA’s Operation and Maintenance Manual Templates.

Download Operation and Maintenance Manual Templates:

Instructions and Opening Appendices:  Instructions for preparing an Operations and Maintenance Manual Stormwater Management Facility Operation and Maintenance (O&M) Manual Appendix A - Arapahoe County Stormwater Facilities Maintenance Agreement Appendix B - Description of Stormwater Management Facilities Appendix C - Standard Operation Procedures (SOP):  Extended Detention Basin SOP Grass Buffer and Grass Swale SOP Porous Landscape Detention SOP Sand Filter Basin SOP Appendix D - Arapahoe County Inspection Forms: Extended Detention Basin Inspection Form Grass Buffer and Grass Swale Inspection Form Porous Landscape Detention Inspection Form Sand Filter Basin Inspection Form

Appendix E - Arapahoe County Maintenance Forms: Extended Detention Basin Maintenance Form Grass Buffer and Grass Swale Maintenance Form Porous Landscape Detention Maintenance Form Sand Filter Basin Maintenance Form Appendix F: Arapahoe County Annual Inspection and Maintenance Submittal form Appendix G – Stormwater Facilities Map; Facility Plan and Details Drawings: Stormwater Facilities Map Checklist Extended Detention Basin Facility Plan Checklist Grass Buffer and Grass Swale Facility Plan Checklist Porous Landscape Detention Facility Plan Checklist Sand Filter Basin Facility Plan Checklist Sample Detail Sheets: Stormwater Facility Map (sample) EDB Plan and Profile (sample)