Description: This layer is a point feature class. A manhole is a small covered opening in a floor, pavement, or other surface to allow a person to enter, especially an opening in a street leading to a sewer.
Copyright Text: Baltimore County, Maryland
Department of Public Works & Transportation
RESPONSIBLE_AGENCY
(
type: esriFieldTypeString, alias: Responsible Agency, length: 75
, Coded Values:
[DEPARTMENT OF RECREATION AND PARKS: DEPARTMENT OF RECREATION AND PARKS]
, [DEPARTMENT OF ENVIRONMENT PROTECTION AND SUSTAINABILITY: DEPARTMENT OF ENVIRONMENT PROTECTION AND SUSTAINABILITY]
, [OFFICE OF BUDGET AND FINANCE: OFFICE OF BUDGET AND FINANCE]
, ...5 more...
)
Description: This point feature class has fix subsets to classify data; duplex, simplex, progressive cavity, centrifugal, and screw. Simplex is a single piston reciprocating device that displaces fluids on both stroke cycles. In other words, the cylinder is filled with fluid above and below the piston, and pumps on both the up and down stroke. Simplex pumps may be powered by electric, gasoline, or diesel motors or by compressed air. Duplex consists of two pumps that alternate the pumping process, thereby allowing it to be more efficient than a single version. This pump has a higher flow rate due to its not having a dead spot in the pump stroke. A progressive cavity is a type of positive displacement pump that transfers fluid by means of the progress, through the pump, of a sequence of small, fixed shape, discrete cavities, as its rotor is turned.
Copyright Text: Baltimore County, Maryland
Department of Public Works & Transportation
RESPONSIBLE_AGENCY
(
type: esriFieldTypeString, alias: Responsible Agency, length: 75
, Coded Values:
[DEPARTMENT OF RECREATION AND PARKS: DEPARTMENT OF RECREATION AND PARKS]
, [DEPARTMENT OF ENVIRONMENT PROTECTION AND SUSTAINABILITY: DEPARTMENT OF ENVIRONMENT PROTECTION AND SUSTAINABILITY]
, [OFFICE OF BUDGET AND FINANCE: OFFICE OF BUDGET AND FINANCE]
, ...5 more...
)
Description: This point feature class has three subsets to classify data; force, low-pressure, and vacuum. Force mains are pipelines that convey wastewater under pressure from the discharge side of a pump or pneumatic ejector to a discharge point. Pumps or compressors located in a lift station provide the energy for wastewater conveyance in force mains. A low pressure main uses a small pump stations to move wastewater through the transmission system. A vacuum evacuates air from a closed volume and develops a pressure differential between the volume and the surrounding atmosphere.
Copyright Text: Baltimore County, Maryland
Department of Public Works & Transportation
RESPONSIBLE_AGENCY
(
type: esriFieldTypeString, alias: Responsible Agency, length: 75
, Coded Values:
[DEPARTMENT OF RECREATION AND PARKS: DEPARTMENT OF RECREATION AND PARKS]
, [DEPARTMENT OF ENVIRONMENT PROTECTION AND SUSTAINABILITY: DEPARTMENT OF ENVIRONMENT PROTECTION AND SUSTAINABILITY]
, [OFFICE OF BUDGET AND FINANCE: OFFICE OF BUDGET AND FINANCE]
, ...5 more...
)
Description: This line feature class has five subsets to classify data; collector, inline storage, inverted siphon, overflow and tunnel. A collector is a conventional gravity sewer that is designed to the slope and size of the pipe adequate to maintain flow towards the discharge point without surcharging manholes or pressurizing the pipe. An inline storage refers to a number of practices designed to use the storage within the pipe system to detain flows by reducing peak flows. An Inverted Siphon allows sewage to pass under obstructions such as rivers. Unlike the main sewer pipe, the siphon pipes flow under pressure and must have flow velocities greater than 3 ft/s (0.9 m/s) to keep material suspended and several siphons having smaller diameters than the main sewer may be required. Overflows are extra pipeline that allows relief when there are more sewage than the pipe can handle in normal conditions. A tunnel is an underground passageway that has a pipeline within it.
Copyright Text: Baltimore County, Maryland
Department of Public Works & Transportation
RESPONSIBLE_AGENCY
(
type: esriFieldTypeString, alias: Responsible Agency, length: 75
, Coded Values:
[DEPARTMENT OF RECREATION AND PARKS: DEPARTMENT OF RECREATION AND PARKS]
, [DEPARTMENT OF ENVIRONMENT PROTECTION AND SUSTAINABILITY: DEPARTMENT OF ENVIRONMENT PROTECTION AND SUSTAINABILITY]
, [OFFICE OF BUDGET AND FINANCE: OFFICE OF BUDGET AND FINANCE]
, ...5 more...
)