National Geodetic Survey, Retrieval Date = NOVEMBER 1, 1999 EV4030 *********************************************************************** EV4030 DESIGNATION - ONYX RESET EV4030 PID - EV4030 EV4030 STATE/COUNTY- CA/SAN BERNARDINO EV4030 USGS QUAD - ONYX PEAK (1988) EV4030 EV4030 *CURRENT SURVEY CONTROL EV4030 ___________________________________________________________________ EV4030* NAD 83(1992)- 34 11 33.23789(N) 116 42 34.11294(W) ADJUSTED EV4030* NAVD 88 - 2779.3 (meters) 9118. (feet) VERT ANG EV4030 ___________________________________________________________________ EV4030 EPOCH DATE - 1992.88 EV4030 X - -2,374,783.747 (meters) COMP EV4030 Y - -4,719,787.151 (meters) COMP EV4030 Z - 3,565,680.009 (meters) COMP EV4030 LAPLACE CORR- -7.32 (seconds) DEFLEC99 EV4030 ELLIP HEIGHT- 2749.45 (meters) GPS OBS EV4030 GEOID HEIGHT- -29.84 (meters) GEOID99 EV4030 EV4030 HORZ ORDER - B EV4030 ELLP ORDER - THIRD CLASS II EV4030 EV4030.The horizontal coordinates were established by GPS observations EV4030.and adjusted by the National Geodetic Survey in August 1998. EV4030.The horizontal coordinates are valid at the epoch date displayed above. EV4030.The epoch date for horizontal control is a decimal equivalence EV4030.of Year/Month/Day. EV4030 EV4030.The orthometric height was determined by vertical angle observations. EV4030 EV4030.The X, Y, and Z were computed from the position and the ellipsoidal ht. EV4030 EV4030.The Laplace correction was computed from DEFLEC99 derived deflections. EV4030 EV4030.The ellipsoidal height was determined by GPS observations EV4030.and is referenced to NAD 83. EV4030 EV4030.The geoid height was determined by GEOID99. EV4030 EV4030; North East Units Scale Converg. EV4030;SPC CA 5 - 1,894,965.81 6,951,915.81 sFT 0.99996931 +0 44 08.2 EV4030;SPC CA 5 - 577,586.735 2,118,948.176 MT 0.99996931 +0 44 08.2 EV4030;UTM 11 - 3,783,545.797 526,768.629 MT 0.99960883 +0 09 47.8 EV4030 EV4030: Primary Azimuth Mark Grid Az EV4030:SPC CA 5 - CHAPARROSA 108 41 30.3 EV4030:UTM 11 - CHAPARROSA 109 15 50.7 EV4030 EV4030|---------------------------------------------------------------------| EV4030| PID Reference Object Distance Geod. Az | EV4030| dddmmss.s | EV4030| ONYX RM 2 3.098 METERS 04254 | EV4030| ONYX RM 1 7.509 METERS 09905 | EV4030| EV4016 CHAPARROSA APPROX.14.2 KM 1092538.5 | EV4030| ONYX RM 3 16.172 METERS 21014 | EV4030|---------------------------------------------------------------------| EV4030 EV4030 SUPERSEDED SURVEY CONTROL EV4030 EV4030 NAD 83(1992)- 34 11 33.22252(N) 116 42 34.12233(W) AD(1991.35) 1 EV4030 NAD 83(1986)- 34 11 33.22291(N) 116 42 34.13094(W) AD(1984.00) 1 EV4030 NAD 27 - 34 11 33.19400(N) 116 42 31.02800(W) AD( ) 1 EV4030 NGVD 29 - 2778.0 (m) 9114. (f) VERT ANG EV4030 EV4030.Superseded values are not recommended for survey control. EV4030.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. EV4030.See file dsdata.txt to determine how the superseded data were derived. EV4030 EV4030_MARKER: DH = HORIZONTAL CONTROL DISK EV4030_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT EV4030_STAMPING: ONYX 1939 1982 EV4030_PROJECTION: FLUSH EV4030_MAGNETIC: N = NO MAGNETIC MATERIAL EV4030_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO EV4030+STABILITY: SURFACE MOTION EV4030_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR EV4030+SATELLITE: SATELLITE OBSERVATIONS - November 12, 1992 EV4030 EV4030 HISTORY - Date Condition Recov. By EV4030 HISTORY - 1982 MONUMENTED NGS EV4030 HISTORY - 1974 MONUMENTED USGS EV4030 HISTORY - 1981 SEE DESCRIPTION CADT EV4030 HISTORY - 19921112 GOOD SCEC EV4030 EV4030 STATION DESCRIPTION EV4030 EV4030'DESCRIBED BY NATIONAL GEODETIC SURVEY 1982 (FGJ) EV4030'ON A HIGH TIMBER COVERED PEAK AT THE HEAD OF CIENEGA SECA CREEK, EV4030'ABOUT 2 MILES SOUTH OF BROOM FLAT, 14 MILES EAST-SOUTHEAST EV4030'OF BIG BEAR LAKE, AND 1-1/2 MILES WEST OF OLSENS ONYX MINE AT EV4030'THE HEAD OF PIPES CANYON. EV4030' EV4030'TO REACH FROM THE MOUTH OF PIPES CANYON ON THE LONE STAR-VICTORVILLE EV4030'HIGHWAY (PIPES CANYON IS 5.0 MILES NORTH OF THE LONE STAR-TWENTYNINE EV4030'PALMS HIGHWAY), FROM THE MOUTH OF PIPES CANYON GO UP THE CANYON EV4030'ON THE MAIN GRADED ROAD 5.1 MILES TO A FORK. TAKE LEFT FORK EV4030'AND GO 2.5 MILES TO TALMAGE RANCH BUILDINGS. PASS BETWEEN EV4030'BUILDINGS AND CONTINUE UP CANYON 7.8 MILES TO PIPES CREEK EV4030'FOREST SERVICE CAMP. CONTINUE UP CANYON 1.6 MILES TO OLSENS EV4030'ONYX MINE AND THE END OF TRUCK TRAVEL. FROM THE LOADING EV4030'PLATFORM AT THE MINE OFFICE TAKE STEEP SWITCHBACK TRAIL EV4030'SOUTHERLY TO MINE ENTRANCE NEAR TOP OF RIDGE. FROM THE MINE EV4030'KEEP RIGHT, WEST, AROUND HILL AT ABOUT THE SAME ELEVATION EV4030'AS THE MINE TO A NARROW GREY RIDGE CONNECTING THIS RIDGE WITH EV4030'THE MAIN RIDGE TO THE WEST. CROSS THIS NARROW RIDGE AND EV4030'FOLLOW UP MAIN RIDGE TO WEST AND SOUTHWEST TO HIGHEST POINT EV4030'AND STATION. EV4030' EV4030'SURFACE AND REFERENCE MARKS ARE STANDARD BRONZE DISKS IN BOULDERS, EV4030'NOTES 4 AND 12C. EV4030 EV4030 STATION RECOVERY (1974) EV4030 EV4030'RECOVERY NOTE BY US GEOLOGICAL SURVEY 1974 (MB) EV4030'STATION PREVIOUSLY REPORTED DESTROYED 6/15/72 WAS FOUND IN EV4030'GOOD CONDITION EV4030 EV4030 STATION RECOVERY (1981) EV4030 EV4030'RECOVERY NOTE BY CALTRANS 1981 (RWH) EV4030'THE STATION AND REFERENCE MARK 1 WERE DESTROYED WHEN 4 FEET WERE CUT EV4030'OFF OF THE TOP OF THE HILL. REFERENCE MARK 2 WAS FOUND WITH STAMPING EV4030'ILLEGIBLE. USING REFERENCE MARK 2, GRANITE 1929, AND LOAF 1929 THE EV4030'STATION MARK AND SUBSURFACE MARK WERE RESET AND A REFERENCE MARK 3 WAS EV4030'ESTABLISHED UNDER THE SUPERVISION OF JAY GUMMOW, NGS MARK MAINTENANCE EV4030'MAN. EV4030' EV4030'A NEW TO REACH DESCRIPTION FOLLOWS. TO REACH THE STATION FROM THE EV4030'INTERSECTION OF CALIFORNIA HIGHWAY 18 AND CALIFORNIA HIGHWAY 38 (BIG EV4030'BEAR BOULEVARD AND GRENWAY DRIVE WITH THE POST OFFICE IN THE EV4030'SOUTHEAST CORNER) IN BIG BEAR CITY, GO EAST ON CALIFORNIA HIGHWAY 38 EV4030'FOR 10.14 MILES TO DIRT FORESTRY ROAD 1N01 AT ONYX SUMMIT POST MILE EV4030'39.36. TURN LEFT ON DIRT FORESTRY ROAD 1N01 AND GO EAST FOR 2 MILES EV4030'TO DIRT FORESTRY ROAD 1N01B. TURN RIGHT ON DIRT FORESTRY ROAD 1N01B EV4030'AND CONTINUE EASTERLY FOR 1.1 MILES TO THE END OF TRUCK TRAVEL AND EV4030'THE STATION ON THE LEFT. EV4030' EV4030'THE STATION IS A STANDARD NGS DISK SET IN A OCTAGON SHAPED CONCRETE EV4030'POST, STAMPED---ONYX 1939-1982---, 193 FEET NORTH OF NORTHWEST CORNER EV4030'OF A FENCED ENCLOSURE, 92 FEET NORTH OF THE END OF TRUCK TRAVEL, EV4030'17 FEET NORTH OF A FORKED TREE, 10 FEET SOUTHWEST OF THE RIDGE, 4 FEET EV4030'HIGHER THAN THE END OF TRUCK TRAVEL, AND PROJECTS 0.1 FOOT. EV4030' EV4030'REFERENCE MARK 2 IS A STANDARD CGS REFERENCE MARK DISK IN A BOULDER, EV4030'STAMPING IS ILLEGIBLE, 198 FEET NORTH OF THE NORTHWEST CORNER OF A EV4030'FENCED ENCLOSURE, 97 FEET NORTH OF THE END OF TRUCK TRAVEL, 24 FEET EV4030'NORTH-NORTHEAST OF A FORKED TREE, 3.3 FEET HIGHER THAN THE END OF EV4030'TRUCK TRAVEL, 0.7 FOOT LOWER THAN THE STATION, ON THE RIDGE LINE, EV4030'PROJECTS 0.2 FOOT. EV4030' EV4030'REFERENCE MARK 3 IS A STANDARD NGS REFERENCE MARK DISK SET IN A EV4030'OCTAGON SHAPED CONCRETE POST STAMPED---ONYX RM NO 3 1939-1982---, 164 EV4030'FEET NORTHWEST OF THE NORTHWEST CORNER OF A FENCED ENCLOSURE, 65 FEET EV4030'NORTHWEST OF THE END OF TRUCK TRAVEL, 60 FEET SOUTHWEST OF THE RIDGE, EV4030'45 FEET SOUTHWEST OF A FORKED TREE, 4.3 FEET LOWER THAN THE STATION, EV4030'0.3 FEET LOWER THAN THE END OF TRUCK TRAVEL, AND PROJECTS 0.1 FOOT. EV4030 EV4030 STATION RECOVERY (1992) EV4030 EV4030'RECOVERY NOTE BY SOUTHERN CALIFORNIA EARTHQUAKE CENTER 1992 (MWC) EV4030'STATION AND REFERENCE MARK 3 RECOVERED IN GOOD CONDITION. STATION IS EV4030'LOCATED ABOUT 26 KM (16.2 MI) NORTHWEST OF YUCCA VALLEY AND 20 KM EV4030'(12.4 MI) SOUTHEAST OF THE COMMUNITY OF BIG BEAR LAKE, IN THE SAN EV4030'BERNARDINO NATIONAL FOREST, ON THE NORTHEAST SIDE OF ONYX PEAK. EV4030'OWNERSHIP--U.S. FOREST SERVICE. NOTE--A KEY FOR THE LOCKED GATE MAY EV4030'BE OBTAINED FROM GORDON AMERSON, 714-383-5698. TO REACH THE STATION EV4030'FROM THE SOUTHERLY T-INTERSECTION OF STATE HIGHWAY 38 AND STATE EV4030'HIGHWAY 18, WHICH IS AT THE EAST END OF BIG BEAR LAKE, GO EAST ON EV4030'STATE HIGHWAY 38 (BIG BEAR BOULEVARD) FOR 2.3 KM (1.4 MI) TO AN EV4030'INTERSECTION. TURN RIGHT, SOUTHEASTERLY, ON STATE HIGHWAY 38 EV4030'(GREENSPOT BOULEVARD) FOR 13.8 KM (8.6 MI) TO A GRAVEL PARKING AREA, EV4030'LEFT, AT ONYX SUMMIT NEAR HIGHWAY 38 POSTMILE 39.40. TURN LEFT, EAST, EV4030'FOR ABOUT 40 M (131.2 FT) TO THE NORTHEAST CORNER OF THE PARKING AREA EV4030'AND A GRADED ROAD UPHILL. CONTINUE AHEAD ON THE GRADED ROAD FOR ABOUT EV4030'125 M (410.1 FT) TO A FORK. TAKE THE LEFT FORK, FOREST SERVICE ROAD EV4030'1N01, NORTH CURVING EVENTUALLY TO SOUTHERLY, FOR 3.2 KM (2.0 MI) TO A EV4030'FORK. TAKE THE RIGHT FORK, FOREST SERVICE ROAD 1N01B, SOUTHERLY AND EV4030'UPHILL, FOR ABOUT 95.0 M (311.7 FT) TO A LOCKED PIPE GATE. PASS EV4030'THROUGH THE GATE ALONG THE ROCKY ROAD FOR 1.61 KM (1.00 MI) TO THE TOP EV4030'AND A FORK. TAKE THE LEFT FORK, NORTHEAST, FOR 65.0 M (213.3 FT) TO EV4030'THE FIRST AND SMALLER OF TWO MICROWAVE RELAY STATIONS, AND THE STATION EV4030'JUST SOUTHEAST OF THE CHAINLINK ENCLOSURE FOR THE SMALLER TOWER, ON EV4030'THE NORTHEAST SIDE OF THE PEAK. STATION IS SET IN A 39-CM OCTAGONAL EV4030'CONCRETE MONUMENT THAT PROJECTS 2 CM. IT IS 5.06 M (16.60 FT) SOUTH OF EV4030'THE NORTHEAST CORNER OF THE CHAINLINK FENCE AND 2.83 M (9.28 FT) EV4030'SOUTHEAST OF THE CLOSEST APPROACH TO THE FENCE.