On-Call Surveying Services
Baltimore County, MD
Development Facilitators, Inc. (DFI) supplied the Baltimore County Department of Public Works with on-call surveying services. DFI was responsible for locating and documenting all gravity sewer lines that are ten inches in diameter or larger and all eight inch lines that are necessary to accurately represent flow attributable to a specific service area in any collection system sewer shed. The crew also had to locate and document all gravity sewer lines that convey wastewater from one pump station service area to another and all gravity sewer lines that caused or contributed to capacity related sanitary sewer overflows. This sanitary sewer collection system serves most of the citizens of Baltimore County, Maryland who live inside the urban-rural demarcation line, some citizens of Anne Arundel and Howard counties, and the facilities located at Baltimore-Washington International (BWI) Airport owned by the state of Maryland.
This work also included the preparation of maps depicting the collection system and all of its appurtenances and the location of all known sanitary sewer overflow structures, as well as all outfalls, manholes and pump stations. The maps generated for the county were updated as needed for the county to prepare and submit a Sanitary Sewer Overflow Characterization Report on an annual basis. The surveying and maps are required to include new or corrected information identified during the prior year.
DFI utilized global positioning (GPS) and Robotic Total Stations services when performing surveys to aid in compliance with a consent decree brought forth by the Environmental Protection Agency (EPA) and the Maryland Department of the Environment (MDE) to eliminate sanitary sewer overflows in accordance with the Clean Water Act.