| gptkbp:instanceOf | gptkb:reservoir 
 | 
                        
                            
                                | gptkbp:basinCountry | gptkb:United_States 
 | 
                        
                            
                                | gptkbp:country | gptkb:United_States 
 | 
                        
                            
                                | gptkbp:createdBy | gptkb:U.S._Army_Corps_of_Engineers 
 | 
                        
                            
                                | gptkbp:hasActivity | boating fishing
 hiking
 picnicking
 swimming
 
 | 
                        
                            
                                | gptkbp:hasDam | gptkb:Blue_Marsh_Dam 
 | 
                        
                            
                                | gptkbp:hasTrail | gptkb:Blue_Marsh_Lake_Trail 
 | 
                        
                            
                                | gptkbp:inflow | gptkb:Tulpehocken_Creek 
 | 
                        
                            
                                | gptkbp:location | gptkb:Berks_County,_Pennsylvania 
 | 
                        
                            
                                | gptkbp:manages | gptkb:Blue_Marsh_National_Recreation_Area 
 | 
                        
                            
                                | gptkbp:maximumDepth | 53 feet 
 | 
                        
                            
                                | gptkbp:nearestCity | gptkb:Reading,_Pennsylvania 
 | 
                        
                            
                                | gptkbp:opened | 1979 
 | 
                        
                            
                                | gptkbp:outflow | gptkb:Tulpehocken_Creek 
 | 
                        
                            
                                | gptkbp:purpose | gptkb:water_supply gptkb:wildlife
 flood control
 recreation
 
 | 
                        
                            
                                | gptkbp:surface | 1,150 acres 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Berks_County,_Pennsylvania 
 | 
                        
                            
                                | gptkbp:bfsLayer | 5 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Blue Marsh Lake 
 |