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This is a derived feature class from data stored in TLDD. TLDD is the single source of record for all transmission asset layers (structures, spans, and lines). Structure locations are maintained in the eGIS SDE database, but are stored and updated in TLDD. All attribute data coming from other systems such as TLM, TLDD, and TRED are also updated in TLDD. The BPA_TLDD_Structure feature class is created using fourTLDD view tables:
TranLineDesign.stgr.v_Span (pk: Strc_Serial_Nbr)
TranLineDesign.dbo.Strc (pk: Strc_Serial_Nbr) - used for structure locations until TLDD updates the stgr.v_Structure table with these values)
TranLineDesign.stgr.v_Structure (pk: Strc_Serial_Nbr)
TranLineDesign.stgr.v_Line (pk: XRef_Cd, Maint_District_Nm)