| gptkbp:instanceOf | gptkb:marina 
 | 
                        
                            
                                | gptkbp:area | approximately 4,000 acres 
 | 
                        
                            
                                | gptkbp:country | gptkb:United_States 
 | 
                        
                            
                                | gptkbp:ecosystem | gptkb:wetlands 
 | 
                        
                            
                                | gptkbp:formedBy | gptkb:Colorado_River 
 | 
                        
                            
                                | gptkbp:habitat | gptkb:fish migratory birds
 amphibians
 
 | 
                        
                            
                                | gptkbp:locatedOn | gptkb:Lower_Colorado_River 
 | 
                        
                            
                                | gptkbp:location | gptkb:San_Bernardino_County,_California gptkb:Mohave_County,_Arizona
 
 | 
                        
                            
                                | gptkbp:managedBy | gptkb:U.S._Fish_and_Wildlife_Service 
 | 
                        
                            
                                | gptkbp:nearestCity | gptkb:Needles,_California gptkb:Topock,_Arizona
 
 | 
                        
                            
                                | gptkbp:partOf | gptkb:Havasu_National_Wildlife_Refuge 
 | 
                        
                            
                                | gptkbp:protectedArea | yes 
 | 
                        
                            
                                | gptkbp:recreationalActivity | birdwatching boating
 fishing
 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Lower_Colorado_River_Valley gptkb:Mohave_people
 gptkb:Topock
 
 | 
                        
                            
                                | gptkbp:bfsLayer | 7 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Topock Marsh 
 |