NEBC OGMA Annual Status

The Old Growth Management Area (OGMA) dataset provides a spatial representation of provincial OGMA in northeast BC. The dataset reports percentage disturbance at the OGMA level and identifies those areas that exceed the designated managed development allowance as High-Risk Status. This information supports consideration of OGMA in decision making under the Environmental Protection and Management Regulation. Field validation of this data is encouraged in development planning. The OGMA Annual Status dataset was initially developed by the BC Energy Regulator for consideration of Managed Development Allowance across OGMA in Northeast BC. Data was derived from the provincial Old Growth Management Areas dataset. Disturbance is estimated using the BCER Surface Land Use data that is updated annually. The Managed Development Allowance allows for 10% disturbance in OGMA that are less than 100ha, and 5% or 10 hectares, whichever is greater, in OGMAs that are greater than 100ha. Data Properties Attributes / Column Name Field Alias Data Type Data Precision Comments OBJECTID Object ID Object ID Unique row number auto generated by database SHAPE Shape Geometry (Polygon) TSA_NUMBER TSA Number Text 30 Timber Supply Area Number TSA_NUMBER_DESCRIPTION TSA Description Text 120 Timber Supply Area for British Columbia. A timber supply area is a designated area established by the Ministry to practice sound, integrated, resource management principles including the allowable annual cut. LEGAL_OGMA_PROVID Provincial Legal OGMA ID Text 20 This is the unique legal identifier assigned to an OGMA by the province. LEGAL_DESC OGMA Legal Description Code Text 5 This field identifies the legislation act name associated with the polygon (FRPA, OGAA or FRPA;OGAA). OGMA_ID OGMA_IDOGMA Unique ID Short The OGMA Identifier DISTURBANCE_RANK Level of Disturbance Short Low, or high (depending if the OGMA is above or below the managed development allowance) INTACTNESS Intactness (%) Double The percentage that the OGMA is intact TRIGGER_HIGH_HA High Rank Trigger (Ha) Double The MDA threshold for hectare calculation TRIGGER_HIGH_PCT High Rank Trigger (%) Double The MDA threshold for percentage calculation AREA_GRP Area Grouping Text 9 OGMA_HA OGMA Area (Ha) Double Total hectare of OGMA CROWN_POLY_HA Crown Area (Ha) Double Total hectare Crown Land CROWN_SLU_HA SLU Crown Area (Ha) Double Hectare Surface Land Use CROWN_CC_HA Current Condition Area (Ha) Double Current condition hectare (crown) SLU_DATE SLU Date Text 9 Vintage of disturbance data used in calculations. SHAPE.AREA Double Area auto calculated by database (m2) SHAPE.LEN Double Polygon perimeter auto calculated by database (m) Renewal Triggers and Service Levels Annual updates Contact Information: For further information please contact Jacqueline Howard Environmental Management Specialist Responsible Development & Stewardship [e-mail]