Los Angeles /Long Beach Differential Leveling Survey 



Bench Mark Designations and Elevations: 



NOAA/NOS "TIDAL 8" @ Elevation + 13.90' MLLW 

 POLB Bollard 1935 @ Elevation + 15.98' MLLW 



April 87 Survey: Survey Date 12 April 1987 



TAPED SENSOR 

 STA BS+ HI FS- ELEV. DISTANCE ELEVATION 



Bollard 1935 5.65' 21.63' 15.98' 



LB-4 5.71' 15.92' 33.95' - 18.03' 



TIDAL 8 5.98' 19.88' 13.90' 



LA-3 6.60' 13.28' 30.78' - 17.50' 



October 87 Survey: Survey Date 15 October 1987 



TAPED SENSOR 

 STA BS+ HI FS- ELEV. DISTANCE ELEVATION 



Bollard 1935 5.72' 21.70' 15.98' 



LB-4 5.78' 15.92' 34.15' -18.23' 



TIDAL 8 5.15' 19.05' 13.90' 



LA-3 5.77' 13.28' 30.70' - 17.42' 



C4 



