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Home My WebLink AboutO&M Manual OPERATIONS AND MAINTENANCE MANUAL WINDWARD AT LEGACY CARMEL, INDIANA BMP OWNER: Lennar Homes of Indiana, Inc. 11555 N Meridian Street, Suite 400 Carmel, IN 46032 CIVIL ENGINEER: HWC ENGINEERING 135 N Pennsylvania Street, Suite 2800 Indianapolis, IN 46204 317-347-3663 office 317-347-3664 fax PROPERTY: Cross Reference Warranty Deed: #2011063056 Parcel ID: 17-10-23-00-00-001.003 OCTOBER 15, 2020 HWC PROJECT NUMBER: 2019-287-A WINDWARD AT LEGACY CARMEL, INDIANA . OPERATIONS AND MAINTENANCE MANUAL | HWC ENGINEERING BMP OWNER CONTACT INFORMATION: Lennar Homes of Indiana, Inc. 11555 N Meridian Street, Suite 400 Carmel, IN 46032 Business: 317-659-3200 Emergency Contact: 317-981-1249 Keith.Lash@lennar.com EMERGENCY CONTACT INFORMATION: City of Carmel Fire Department: 317-571-2600 City of Carmel Public Works & Engineering Department: 317-571-2441 Indiana Department of Environmental Management: 317-232-8603 BMP INFORMATION: This Operation and Maintenance (O&M) Manual has been prepared for Windward at Legacy to help the owner operate and maintain the post-construction Best Management Practices (BMPs). Windward at Legacy will utilize eight (8) new two-foot sumped manholes to handle water quality. REPORTING REQUIREMENTS: It is the responsibility of the BMP Owner to operate and maintain the installed BMPs, including routine monthly and annual inspections. The BMP Owner is responsible for all costs associated with the BMP inspections and repairs. Maintenance responsibilities shall remain in effect for the life of the BMP. Inspections must be documented on the inspection form included in the Appendices. The first report is due one year after construction is completed, with subsequent reports due each year within the same month of the initial report. If there are any deficiencies found during the inspection, these should be addressed. If the inspection report is not received within the month it is due, if there are deficiencies which were not included in the report, or if any deficiencies included in the report are not addressed in a timely manner, the BMP Owner faces enforcement action from the City. WINDWARD AT LEGACY CARMEL, INDIANA . OPERATIONS AND MAINTENANCE MANUAL | HWC ENGINEERING Submit Annual Reports to: Storm Water Program Engineering Department One Civic Square Carmel, IN 46032 The BMP Owner shall be responsible for all fees as outlined by the City of Carmel. WINDWARD AT LEGACY CARMEL, INDIANA OPERATIONS AND MAINTENANCE MANUAL | HWC ENGINEERING SUMP STRUCTURE BMP WINDWARD AT LEGACY CARMEL, INDIANA . OPERATIONS AND MAINTENANCE MANUAL | HWC ENGINEERING BMP DESCRIPTION Sump structures allow solids to settle out of the storm water prior to flowing downstream to the ditch and then on to the wet ponds (part of the Legacy Master Drainage plan). These structures serve as pretreatment measures for the downstream wet ponds. In its most basic application, a sump structure creates a disturbance in the stormwater flow that forces heavier solids to sink to the bottom of the sump as water passes through the structure. As with other stormwater quality BMPs, design and maintenance considerations will have a dramatic impact on the effectives of the sump structure. The frequency of maintenance required will directly relate to the depth of the sump of the structure (the distance between the outlet pipe invert and the bottom of the structure). BMP MAINTENANCE AND INSPECTION ACTIVITIES The BMP owner will perform monthly maintenance for the first year of a new installation after the site has been stabilized. The following tasks are considered the routine maintenance: 1. Sediment depth measurement:  Measurements should be taken after each rain event of 0.5 inches or more, or monthly, as determined by local weather conditions.  Checking sediment depth and noting the surface pollutants in the structure will be helpful in planning maintenance. The pollutants collected in sump structures will consist of grit and sediment on the bottom of the structure.  It is best to schedule maintenance based on the solids collected in the sump. Optimally, the structure should be cleaned when the sump is half full (e.g. when 2 feet of material collects in a 4 foot sump, clean it out).  Structures should also be cleaned if a spill or other incident causes a larger than normal accumulation of pollutants in a structure.  Maintenance is best done with a vacuum truck.  If oil absorbent hydrophobic booms are being used in the structure to enhance hydrocarbon capture and removals, they should be checked on a monthly basis, and serviced or replaced when more than 2/3 of the boom is submerged, indicating a nearly saturated state.  All collected wastes must be handled and disposed of according to local environmental requirements. WINDWARD AT LEGACY CARMEL, INDIANA . OPERATIONS AND MAINTENANCE MANUAL | HWC ENGINEERING