National Geodetic Survey, Retrieval Date = OCTOBER 30, 1999 EW1864 *********************************************************************** EW1864 DESIGNATION - WILSON PEAK EW1864 PID - EW1864 EW1864 STATE/COUNTY- CA/LOS ANGELES EW1864 USGS QUAD - MT WILSON EW1864 EW1864 *CURRENT SURVEY CONTROL EW1864 ___________________________________________________________________ EW1864* NAD 83(1992)- 34 13 25.53249(N) 118 03 41.92169(W) ADJUSTED EW1864* NAVD 88 - 1741.20 (+/-2cm) 5712.6 (feet) VERTCON EW1864 ___________________________________________________________________ EW1864 EPOCH DATE - 1991.35 EW1864 LAPLACE CORR- 3.39 (seconds) DEFLEC99 EW1864 GEOID HEIGHT- -32.79 (meters) GEOID99 EW1864 EW1864 HORZ ORDER - FIRST EW1864 VERT ORDER - FIRST CLASS II (See Below) EW1864 EW1864.The horizontal coordinates were established by classical geodetic methods EW1864.and adjusted by the National Geodetic Survey in June 1996. EW1864.The horizontal coordinates are valid at the epoch date displayed above. EW1864.The epoch date for horizontal control is a decimal equivalence EW1864.of Year/Month/Day. EW1864 EW1864.The NAVD 88 height was computed by applying the VERTCON shift value to EW1864.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) EW1864.The vertical order pertains to the superseded datum. EW1864 EW1864.The Laplace correction was computed from DEFLEC99 derived deflections. EW1864 EW1864.The geoid height was determined by GEOID99. EW1864 EW1864; North East Units Scale Converg. EW1864;SPC CA 5 - 1,903,817.99 6,543,031.95 sFT 0.99996419 -0 02 06.5 EW1864;SPC CA 5 - 580,284.883 1,994,320.128 MT 0.99996419 -0 02 06.5 EW1864;UTM 11 - 3,787,475.945 402,215.135 MT 0.99971786 -0 35 49.7 EW1864 EW1864: Primary Azimuth Mark Grid Az EW1864:SPC CA 5 - MT WILSON OBSERVATORY DOME 060 19 52.8 EW1864:UTM 11 - MT WILSON OBSERVATORY DOME 060 53 36.0 EW1864 EW1864|---------------------------------------------------------------------| EW1864| PID Reference Object Distance Geod. Az | EW1864| dddmmss.s | EW1864| EW1863 WILSON PEAK RM 3 14.855 METERS 02300 | EW1864| EW7225 MT WILSON OBSERVATORY DOME 478.470 METERS 0601746.3 | EW1864| EW7223 MT WILSON CARNEGIE N OBS TWR 288.760 METERS 07319 | EW1864| EW1865 WILSON PEAK RM 4 8.506 METERS 08646 | EW1864| EW7222 MT WILSON TV STA KRCA TOWER 388.678 METERS 29909 | EW1864| EW7204 JOSEPHINE MOUNTAIN LOH APPROX.10.9 KM 3085744.5 | EW1864|---------------------------------------------------------------------| EW1864 EW1864 SUPERSEDED SURVEY CONTROL EW1864 EW1864 NAD 83(1986)- 34 13 25.53153(N) 118 03 41.91590(W) AD(1984.00) 1 EW1864 NAD 27 - 34 13 25.51235(N) 118 03 38.67427(W) AD( ) 1 EW1864 NGVD 29 - 1740.338 (m) 5709.76 (f) ADJ UNCH 1 2 EW1864 EW1864.Superseded values are not recommended for survey control. EW1864.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. EW1864.See file dsdata.txt to determine how the superseded data were derived. EW1864 EW1864_MARKER: B = BOLT EW1864_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT EW1864_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO EW1864+STABILITY: SURFACE MOTION EW1864 EW1864 HISTORY - Date Condition Recov. By EW1864 HISTORY - UNK MONUMENTED USGS EW1864 HISTORY - 1933 MONUMENTED CGS EW1864 HISTORY - 1950 MONUMENTED CGS EW1864 HISTORY - 1956 MONUMENTED CGS EW1864 HISTORY - 1958 MONUMENTED CGS EW1864 HISTORY - 1961 MONUMENTED CGS EW1864 HISTORY - 1961 GOOD NGS EW1864 HISTORY - 19800617 MARK NOT FOUND LOCSUR EW1864 EW1864 STATION DESCRIPTION EW1864 EW1864'DESCRIBED BY COAST AND GEODETIC SURVEY 1933 (GD) EW1864'ON MOUNT WILSON, 60 METERS (197 FEET) SOUTH-SOUTHWEST OF EW1864'MOUNT WILSON HOTEL. TO REACH FROM FOOTHILL BOULEVARD AND EW1864'MENDOCINO LANE IN ALTADENA, FOLLOW MOUNT WILSON TOLL ROAD TO EW1864'SUMMIT. IN 1890 UNDERGROUND MARK WAS COPPER BOLT WITH CROSS EW1864'LEADED INTO DRILL HOLE IN LARGE ROCK ABOUT 20 INCHES BELOW EW1864'SURFACE. SURFACE MARK WAS STONE. IN 1896 SURFACE STONE HAD EW1864'BEEN REMOVED, BUT UNDERGROUND MARK WAS UNDISTURBED. HEXAGONAL EW1864'CONCRETE PIER, 26 INCHES IN DIAMETER AND EXTENDING 3.2 FEET EW1864'ABOVE SURFACE, WITH 3/4-INCH COPPER BOLT AND CROSS IN TOP WAS EW1864'ERECTED OVER STATION. REFERENCE MARKS WERE ESTABLISHED AT EW1864'THE FOLLOWING TRUE AZIMUTHS AND DISTANCES FROM STATION--BIG EW1864'PINE, WIRE NAIL IN BLAZE, 41.5 FEET, 61 DEG 24 MIN. EW1864'SOUTHWEST CORNER OF PORCH OF CASINO, 21.3 FEET, 149 DEG EW1864'24 MIN. NAIL IN CENTER OF DOORSILL OF CASINO, 11.6 FEET, EW1864'213 DEG 44 MIN. SOUTHEAST CORNER OF PORCH OF CASINO, 19.2 EW1864'FEET, 286 44 MIN. AND BIG PINE, WIRE NAIL IN BLAZE, 109 FEET, EW1864'299 DEG 19 MIN. IN 1922 REFERENCE MARKS WERE NOT EW1864'RECOVERED. IN 1933 STATION MARK WAS CENTERED IN GROUND FLOOR EW1864'OF AN 18-FOOT HIGH, FRAME OBSERVATION TOWER. EW1864 EW1864 STATION RECOVERY (1950) EW1864 EW1864'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1950 (JCE) EW1864'STATION MARK WAS RECOVERED AS DESCRIBED WITH THE EXCEPTION EW1864'THAT THE CONCRETE BASE OF THE 18-FOOT FRAME OBSERVATORY EW1864'TOWER DESCRIBED IN 1933 IS THE ONLY PORTION NOW IN EVIDENCE. EW1864'THE MARK IS IN GOOD CONDITION. THE REFERENCE MARKS COULD EW1864'NOT BE FOUND. EW1864 EW1864 STATION RECOVERY (1956) EW1864 EW1864'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1956 (RLE) EW1864'THE STATION-SURFACE MARK SET IN 1896 OVER THE ORIGINAL 1890 EW1864'UNDERGROUND MARK, WAS RECOVERED AND IS IN GOOD CONDITION. EW1864'THE ORIGINAL (WIRE NAILS) REFERENCE MARKS WERE NOT RECOVERED. EW1864'TWO NEW REFERENCE MARKS WERE ESTABLISHED BY THIS PARTY. EW1864'FOLLOWING IS A NEW AND COMPLETE DESCRIPTION-- EW1864' EW1864'THE STATION IS LOCATED ON THE SUMMIT OF MOUNT WILSON, 200 FT. EW1864'S-SW OF THE MOUNT WILSON HOTEL, AND ABOUT 35 FT. SW OF A EW1864'SMALL OBSERVATORY BUILDING THAT HOUSES A 12-IN TELESCOPE (FOR EW1864'TOURISTS). THE STATION IS MARKED WITH A 3/4-IN. COPPER BOLT EW1864'(CROSS IN TOP) THAT IS SET FLUSH IN THE TOP OF A HEXAGONAL EW1864'CONCRETE PIER, 26 IN. IN DIAMETER AND PROJECTS 38 IN. ABOVE EW1864'THE SURFACE OF A MACADAM. EW1864' EW1864'REFERENCE MARK 3 IS 18 FT. NW OF THE NW CORNER OF THE SMALL EW1864'OBSERVATORY BUILDING, AND 5 FT. S OF THE S END OF A 3-FT. EW1864'GUARDRAIL. IT IS A STANDARD REFERENCE-MARK DISK, STAMPED WILSON EW1864'PEAK NO 3 1890, AND IS SET FLUSH IN A CONCRETE SLAB THAT COVERS EW1864'THE AREA LEADING TOWARDS THE HOTEL. EW1864' EW1864'REFERENCE MARK 4 IS LOCATED JUST W OF THE E 3-FT GUARDRAIL. EW1864'IT IS A STANDARD REFERENCE-MARK DISK, STAMPED WILSON PEAK NO EW1864'4 1890, AND IS SET FLUSH IN THE CONCRETE SLAB. EW1864' EW1864'TO REACH THE STATION FROM THE INTERSECTION OF STATE HIGHWAYS EW1864'2 AND 118 IN LA CANADA, GO E ON STATE HIGHWAY 2 FOR 16 MI. TO EW1864'THE RED BOX GUARD STATION ON THE RIGHT. TURN RIGHT (LEAVING STATE EW1864'HIGHWAY 2) AND FOLLOW MACADAM ROAD TOWARDS WILSON PEAK AS PER EW1864'SIGNS, AND GO 5.5 MI. TO THE SUMMIT AND A TOLL GATE. PASS EW1864'THROUGH THE TOLL GATE AND CONTINUE FOR 0.2 MI. TO THE HOTEL AND EW1864'THE STATION AS DESCRIBED. EW1864' EW1864'NO SUITABLE SITE FOR AN AZIMUTH MARK, HOWEVER THERE ARE EW1864'SEVERAL TELEVISION AND OBSERVATORY TOWERS ON THE SUMMIT OF EW1864'THE MOUNTAIN. EW1864 EW1864 STATION RECOVERY (1958) EW1864 EW1864'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1958 (WRH) EW1864'THE STATION AND REFERENCE MARKS 3 AND 4 WERE RECOVERED IN EW1864'GOOD CONDITION. A COMPLETE DESCRIPTION FOLLOWS-- EW1864' EW1864'THE STATION IS LOCATED ABOUT 10 MI., AIRLINE, E-NE OF LA CANADA, EW1864'9 MI. AIRLINE, NE OF PASADENA, AND 7 MI. AIRLINE, NW OF EW1864'MONROVIA. EW1864' EW1864'TO REACH THE STATION FROM THE INTERSECTION OF CALIFORNIA EW1864'STATE HIGHWAYS 118 AND 2 (0.5 MI. E OF THE U.S. POST OFFICE EW1864'IN LA CANADA), GO N ON CALIFORNIA STATE HIGHWAY 2 FOR 11.1 EW1864'MI. TO THE JUNCTION OF ANGELS CREST HIGHWAY AND ANGELS FOREST EW1864'HIGHWAY. TURN RIGHT ON ANGELS CREST HIGHWAY (STATE HIGHWAY EW1864'2) AND GO E FOR 4.45 MI. TO THE JUNCTION OF MT. WILSON ROAD. EW1864'TURN RIGHT ON MT. WILSON ROAD AND CONTINUE FOR 4.85 MI. TO EW1864'THE ENTRANCE TO THE MT. WILSON PARK. CONTINUE THROUGH THE EW1864'GATE FOR 0.25 MI. TO THE MT. WILSON HOTEL PARKING LOT AND THE EW1864'END OF TRUCK TRAVEL. FROM THE PARKING LOT GO W (PAST THE S EW1864'SIDE OF THE HOTEL) TO THE CONCRETE PATIO JUST SW OF THE EW1864'HOTEL AND THE STATION. EW1864' EW1864'THE STATION MARK IS A 3/4-IN. COPPER BOLT, MARKED BY A CROSS EW1864'AND PUNCHMARK AT THE CENTER, SET IN THE TOP OF A 26-IN. HEXAGONAL EW1864'CONCRETE PIER THAT PROJECTS 3.2 FT. ABOVE THE CONCRETE PATIO. EW1864'WILSON PEAK NOVEMBER 1896 USC AND G SURVEY, IS ENGRAVED ON EW1864'THE SIDE OF THE MONUMENT. EW1864' EW1864'REFERENCE MARK 3 IS A STANDARD BRONZE DISK, SET IN CEMENT EW1864'IN A DRILL HOLE AND IS STAMPED WILSON PEAK NO 3 1890. THE EW1864'MARK IS SET IN A CONCRETE PATIO 6 FT. SE OF A 3-FT. RAILING EW1864'POST, AND 3 FT. S OF A RAMP LEADING TO THE HOTEL. EW1864' EW1864'REFERENCE MARK 4 IS A STANDARD BRONZE DISK, SET IN CEMENT EW1864'IN A DRILL HOLE AND IS STAMPED WILSON PEAK NO 4 1890. THE EW1864'MARK IS SET IN A CONCRETE PATIO 6 IN. W OF A 3-FT. RAILING, EW1864'AND 9 FT. E OF THE E RAIL OF A TRACK IMBEDDED IN THE PATIO. EW1864' EW1864'THE SOLAR OBSERVATORY (THE HIGHEST OF THREE) WAS USED AS AN EW1864'AZIMUTH MARK. EW1864 EW1864 STATION RECOVERY (1961) EW1864 EW1864'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (EBB) EW1864'THE STATION AND REFERENCE MARKS 3 AND 4 WERE RECOVERED IN EW1864'GOOD CONDITION AS DESCRIBED EW1864 EW1864 STATION RECOVERY (1961) EW1864 EW1864'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1961 EW1864'AT MOUNT WILSON. EW1864'AT MOUNT WILSON, AT THE HOTEL, IN THE TOP OF A 2 BY 2 FOOT EW1864'CONCRETE POST WHICH PROJECTS 3 1/2 FEET ABOVE THE SURFACE OF EW1864'THE ASPHALT PATIO, 28.4 FEET SOUTHWEST OF THE SOUTHWEST CORNER EW1864'OF THE BUILDING HOUSING THE 12-INCH TELESCOPE, 12.1 FEET EW1864'EAST-NORTHEAST OF THE EAST-NORTHEAST CORNER OF A HISTORICAL EW1864'BRONZE PLATE IN THE MEMORY BENJAMIN DAVIS WILSON, 29.1 FEET EW1864'EAST OF POWER LINE POLE 411957E, 10.6 FEET NORTH-NORTHWEST OF EW1864'THE WEST-NORTHWEST END OF A GUARDRAIL AROUND PATIO, AND 3 1/2 EW1864'FEET HIGHER THAN THE PATIO. EW1864 EW1864 STATION RECOVERY (1980) EW1864 EW1864'RECOVERY NOTE BY LOCAL SURVEYOR (INDIVIDUAL OR FIRM) 1980 (RJM) EW1864'MARK NOT FOUND.