National Geodetic Survey, Retrieval Date = SEPTEMBER 14, 2002 LT0638 *********************************************************************** LT0638 DESIGNATION - RIM LT0638 PID - LT0638 LT0638 STATE/COUNTY- CA/SHASTA LT0638 USGS QUAD - MURKEN BENCH (1995) LT0638 LT0638 *CURRENT SURVEY CONTROL LT0638 ___________________________________________________________________ LT0638* NAD 83(1992)- 40 48 31.41740(N) 121 24 53.50719(W) ADJUSTED LT0638* NAVD 88 - 1562.1 (meters) 5125. (feet) VERTCON LT0638 ___________________________________________________________________ LT0638 EPOCH DATE - 1991.35 LT0638 X - -2,520,498.118 (meters) COMP LT0638 Y - -4,126,831.111 (meters) COMP LT0638 Z - 4,147,374.208 (meters) COMP LT0638 LAPLACE CORR- 10.02 (seconds) DEFLEC99 LT0638 ELLIP HEIGHT- 1538.12 (meters) GPS OBS LT0638 GEOID HEIGHT- -23.99 (meters) GEOID99 LT0638 LT0638 HORZ ORDER - A LT0638 ELLP ORDER - FIRST CLASS I LT0638 LT0638.The horizontal coordinates were established by VLBI observations LT0638.and local terrestrial surveys and adjusted by the LT0638.National Geodetic Survey in April 1992. LT0638.The horizontal coordinates are valid at the epoch date displayed above. LT0638.The epoch date for horizontal control is a decimal equivalence LT0638.of Year/Month/Day. LT0638 LT0638.The NAVD 88 height was computed by applying the VERTCON shift value to LT0638.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) LT0638 LT0638.The X, Y, and Z were computed from the position and the ellipsoidal ht. LT0638 LT0638.The Laplace correction was computed from DEFLEC99 derived deflections. LT0638 LT0638.The ellipsoidal height was determined by GPS observations LT0638.and is referenced to NAD 83. LT0638 LT0638.The geoid height was determined by GEOID99. LT0638 LT0638; North East Units Scale Converg. LT0638;SPC CA 1 - 663,988.315 2,049,367.081 MT 0.99989474 +0 22 57.4 LT0638;SPC CA 1 - 2,178,435.00 6,723,631.83 sFT 0.99989474 +0 22 57.4 LT0638;UTM 10 - 4,518,733.157 633,699.605 MT 0.99982002 +1 02 09.9 LT0638 LT0638: Primary Azimuth Mark Grid Az LT0638:SPC CA 1 - RIM AZ MK 337 44 40.0 LT0638:UTM 10 - RIM AZ MK 337 05 27.5 LT0638 LT0638|---------------------------------------------------------------------| LT0638| PID Reference Object Distance Geod. Az | LT0638| dddmmss.s | LT0638| DB7662 RIM RM 3 0412932.4 | LT0638| DB7660 RIM RM 1 13.904 METERS 09248 | LT0638| DB7661 RIM RM 2 15.435 METERS 15828 | LT0638| LT0641 HAT CREEK RIM LOT 1948 19.693 METERS 17122 | LT0638| DB7659 RIM AZ MK 3380737.4 | LT0638|---------------------------------------------------------------------| LT0638 LT0638 SUPERSEDED SURVEY CONTROL LT0638 LT0638 NAD 83(1986)- 40 48 31.42655(N) 121 24 53.51186(W) AD(1984.00) 2 LT0638 NAD 27 - 40 48 31.84300(N) 121 24 49.59700(W) AD( ) 2 LT0638 NGVD 29 - 1561.1 (m) 5122. (f) VERT ANG LT0638 LT0638.Superseded values are not recommended for survey control. LT0638.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. LT0638.See file dsdata.txt to determine how the superseded data were derived. LT0638 LT0638_MARKER: DO = NOT SPECIFIED OR SEE DESCRIPTION LT0638_SETTING: 66 = SET IN ROCK OUTCROP LT0638 LT0638 HISTORY - Date Condition Report By LT0638 HISTORY - 1948 MONUMENTED CGS LT0638 HISTORY - 1973 GOOD NGS LT0638 HISTORY - 1974 GOOD NGS LT0638 LT0638 STATION DESCRIPTION LT0638 LT0638'DESCRIBED BY COAST AND GEODETIC SURVEY 1948 (WRH) LT0638'THE STATION IS LOCATED ON THE HIGHEST POINT OF HAT RIM, WHICH LT0638'IS A NORTH-SOUTH RIDGE, 64.6 FEET NORTH NORTHWEST OF HAT LT0638'CREEK RIM LOOKOUT TOWER, ABOUT 24 MILES, AIRLINE, NORTHEAST OF LT0638'VIOLA, 14 MILES, AIRLINE EAST SOUTHEAST OF BURNEY AND 5 MILES, LT0638'AIRLINE, EAST OF HAT CREEK RANGER STATION. LT0638' LT0638'THE STATION MARK, STAMPED RIM 1948, IS A STANDARD DISK SET IN LT0638'OUTCROPPING BEDROCK THAT PROJECTS 6 INCHES. LT0638' LT0638'REFERENCE MARK NUMBER 1, STAMPED RIM NO 1 1948, IS A STANDARD LT0638'DISK SET IN OUTCROPPING BEDROCK THAT PROJECTS 6 INCHES AND IS LT0638'THE SAME ELEVATION AS THE STATION. LT0638' LT0638'REFERENCE MARK NUMBER 2, STAMPED RIM NO 2 1948, IS A STANDARD LT0638'DISK SET IN THE BOTTOM STEP OF 4 CONCRETE STEPS LEADING TO THE LT0638'LOOKOUT TOWER. IT IS THE SAME ELEVATION AS THE STATION. LT0638' LT0638'THE AZIMUTH MARK, STAMPED RIM 1948, IS A STANDARD DISK SET IN LT0638'OUTCROPPING BEDROCK THAT PROJECTS 6 INCHES. IT IS 36 FEET LT0638'SOUTHWEST OF TRACK ROAD LEADING TO THE LOOKOUT TOWER AND 8 FEET LT0638'NORTHEAST OF A TRIANGULAR BLAZED PINE TREE. TO REACH FROM THE LT0638'STATION GO NORTH NORTHWEST ON TRACK ROAD FOR 0.3 MILE TO THE LT0638'AZIMUTH MARK ON THE LEFT. LT0638' LT0638'HAT CREEK RIM LOOKOUT TOWER IS A WOODEN 12 BY 12 FOOT HOUSE LT0638'ON A 40 FOOT STEEL TOWER. THE ROOF IS SLOPING AND ABOUT 55 FEET LT0638'ABOVE THE GROUND. THE DISTANCE AND DIRECTION WAS MADE TO THE LT0638'CENTER OF THE STEEL TOWER. LT0638' LT0638'THE STATION IS REACHED AS FOLLOWS--FROM THE HAT CREEK RANGER LT0638'STATION ON STATE HIGHWAY 89, GO WEST ON THE HIGHWAY FOR 0.15 LT0638'MILE TO A SIDE ROAD ON THE RIGHT AND A SIGN RIM LOOKOUT. LT0638'TURN RIGHT AS PER SIGN AND GO 1.45 MILES TO A T ROAD. TURN LT0638'RIGHT, EAST, AS PER SIGN RIM LOOKOUT AND GO 2.35 MILES TO A LT0638'T ROAD. TURN LEFT AND GO 0.05 MILE TO A WIRE GATE. PASS LT0638'THROUGH GATE AND CONTINUE FOR 4.5 MILES TO A Y FORK. TAKE LT0638'RIGHT FORK AND GO 2.1 MILES TO THE LOOKOUT TOWER AND THE LT0638'STATION ON THE RIGHT. LT0638 LT0638 STATION RECOVERY (1973) LT0638 LT0638'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1973 (CLN) LT0638'THE STATION MARK, AZIMUTH MARK, REFERENCE MARKS 1 AND 2, AND LT0638'HAT CREEK RIM LOOKOUT TOWER 1948 WERE RECOVERED IN GOOD LT0638'CONDITION AND THE DISTANCES AND DIRECTIONS TO REFERENCE MARKS LT0638'1 AND 2 MEASURED ON THIS DATE AGREED WITH THE 1948 MEASUREMENTS. LT0638'THE DISTANCE AND DIRECTION TO THE LOOKOUT MEASURED ON THIS DATE LT0638'DIFFERED SLIGHTLY FROM THE 1948 MEASUREMENTS. THE AZIMUTH MARK LT0638'WAS FOUND TO BE OBSTRUCTED BY TREES SO AN ADDITIONAL AZIMUTH LT0638'MARK WAS SET ON THIS DATE. THE 1948 DESCRIPTION IS ADEQUATE LT0638'WITH THE FOLLOWING ADDITIONS-- LT0638' LT0638'TO REACH THE STATION FROM THE HAT CREEK RANGER STATION AND WORK LT0638'CENTER GO NORTH ON STATE HIGHWAY 89 FOR 0.15 MILE TO A SIDE LT0638'ROAD ON THE RIGHT. TURN RIGHT AND GO NORTHEAST 1.3 MILES TO LT0638'A SIDE ROAD ON THE RIGHT. TURN RIGHT AND GO EAST 2.4 MILES LT0638'TO A T-INTERSECTION. TURN LEFT AS/SIGN HAT CREEK RIM L.O. 8 LT0638'AND GO NORTHEAST 3.8 MILES TO A FORK. TAKE THE RIGHT FORK LT0638'AS/SIGN HAT CREEK RIM L.O. 4 AND GO SOUTHEAST 1.9 MILES TO A LT0638'FORK. TAKE THE RIGHT FORK AS/SIGN HAT CREEK RIM L.O. 2 AND LT0638'GO SOUTHWEST 1.4 MILES TO THE AZIMUTH MARK (R.M. 3) ON THE LT0638'RIGHT. CONTINUE SOUTHWEST ON THE ROAD 0.2 MILE TO THE HAT CREEK LT0638'RIM LOOKOUT AND THE STATION SITE. LT0638' LT0638'AZIMUTH MARK 2 (R.M. 3) IS A NGS REFERENCE MARK DISK STAMPED LT0638'RIM 1948 NO 3 1973 CEMENTED IN A DRILL HOLE IN THE TOP OF A LT0638'2 X 5-FOOT OUTCROPPING OF ROCK PROJECTING 0.2 FOOT ABOVE THE LT0638'GROUND AND IS 37 FEET NORTHWEST OF THE CENTER LINE OF THE LT0638'ROAD, 7.3 FEET SOUTHWEST OF A METAL WITNESS POST, AND ABOUT THE LT0638'SAME ELEVATION AS THE ROAD. LT0638' LT0638'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--5 MILES LT0638'EAST OF HAT CREEK RANGER STA. LT0638 LT0638 STATION RECOVERY (1974) LT0638 LT0638'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1974 (PRL) LT0638'STATION RECOVERED AS DESCRIBED. VISITED BY LIGHTKEEPER ONLY. LT0638' LT0638'HEIGHT OF LIGHT ABOVE STATION MARK 5 FEET. LT0638' LT0638'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--14 MILES LT0638'EAST SOUTHEAST OF BURNEY