| Description | |||
| Abstract: Represents Best Management Practice (BMP); also referred to as retention ponds in other regions of the county. BMPs are structural devices used to protect waterways by handling stormwater runoff. | |||
| Purpose: To support settlement of suspended materials in the water, promoting water quality. BMPs are used in a GIS-based Asset Management System (AMS), which supports work coordination, asset replacement/planning, asset inventorying, mapping, and over-all management of the stormwater system. | |||
| Supplemental Information: Notes on stormwater system data capture (2003-2005): Original field mapping/inventorying of stormwater features was driven by the Department of Public Works' (DPW) stormwater engineer to 1) meet Virginia Pollutant Discharge Elimination System (VPDES) General Permit Number VAR040, and 2) to prepare for the use of these features in an Asset Management System. According to the VPDES mandate, all outfalls 36 inch diameter and greater, or 12 inch diameter and greater in industrial areas, were identified and tabulated. Subsequently, with the support of DPW's stormwater engineer, the GIS Team then consulted to have GPS field data collection of these VPDES outfalls and all of the upstream infrastructure feeding them. Following the initial mapping for VPDES, the GIS Team continued to contract for additional GPS-based field data collection of the south-side annex area to fill in any of the remaining gaps. This initial GPS field data collection was performed in FY02-03 and FY03-04. Some of the outfall systems defined by VPDES were digitized from DPW's existing hardcopy maps, although most had to be field collected. BMPs were one one the feature types that the DPW stormwater engineer identified for inventorying. In 2004, the stormwater system maps housed in DPW were digitized by a GIS Technician. These maps covered the older parts of the City (pre-annex), which were primarily maps of north-side and not part of the combined sewer system, and included areas on the south-side that were in the Jefferson Davis Hwy corridor. (Note: please see hydr_SystemBoundary feature class for description and coverage of mapped areas.) The Stormwater system conversion effort stopped in 2004, leaving approximately 40% of the City's southside stormwater system unmapped. It was not until 2008, that the Department of Public Utilities (DPU) consulted with their gas/water/sewer/street light data conversion vendor to complete the mapping of the stormwater system. Notes on stormwater system data capture (2008): The City possessed annex stormwater system maps, produced by J.K. Timmons and Associates in 1983, as a supplement and update to The Comprehensive Drainage Study of the 1970 Annexation Area of Richmond. These maps were never used in the original effort, because they were recognized as incomplete or inaccurate. DPU's consultant digitized stormwater infrastructure for the south-side annex area from these maps, in addition to conducting GPS field inventorying for the remaining 40% of unmapped areas, which included the capture of additional BMPs. Important Note: The hydrology dataset will require further evaluation & re-organization as Stormwater comes on-line in DPU and when the City needs to support stream network modeling; additional attribution of streams will be needed, i.e. perennial -vs- non perennial indicators. While the original data collection activities did not result in the population of the EditBy and EditDate attribute fields, feature level metadata is now enabled on these assets with the use of these fields. Every feature in the GIS layers can be tracked according to who edited it, and when it was last edited. Internal documentation and background about the stormwater data collection project (2002-2005): Q:\Infrastructure\Geodatabase\Datasets\Hydrology\StormWater\StormwaterProject.doc | |||
| Contact | |||
| Custodian: | Eddie Childers | ||
| Department: | Public Utilities | ||
| Position: | GIS Manager | ||
| Address: | 400 Jeff Davis Hwy | ||
| City: | Richmond | ||
| State: | Virginia | ||
| Zip Code: | 232224 | ||
| Email: | Eddie.Childers@richmondgov.com | ||
| Time Period of Content | |||
| Beginning Date: | 200301 | ||
| Ending Date: | 200810 | ||
| Status | |||
| Progress: | Complete | ||
| Update Frequency: | As needed | ||
| Spatial Domain | |||
| West Coordinate: | -77.575407 | ||
| East Coordinate: | -77.485657 | ||
| North Coordinate: | 37.555370 | ||
| South Coordinate: | 37.491675 | ||
| Spatial Data Information | |||
| Data Type: | vector digital data | ||
| Data Format: | SDE Feature Class | ||
| Data Projection: | Lambert Conformal Conic | ||
| Access and Usage Information | |||
| Access Constraints: | none | ||
| Use Constraints: | All GIS layers and datasets are owned by the City of Richmond and can not be modified, re-distributed, and/or re-sold without a sub-licensing agreement. All guarantees of validity expire once a dataset leaves the City of Richmond firewall or physical premises. Acknowledgement of the City of Richmond GIS would be appreciated in products derived from these data. | ||
| Entity and Attribute Information | |||
| Entity Name: | vector.ric.hydr_BMP | ||
| Entity Type: | Feature Class | ||
| Entity Count: | 26 | ||