Benchmark file generated by bmgpx bmgpx by Ron Parker bmgpx@parkrrrr.com HT0154 0+47.81 EBMUD http://www.geocaching.com/mark/details.asp?PID=HT0154 0+47.81 EBMUD Geocache Geocache 0+47.81 EBMUD EBMUD Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>0+47.81 EBMUD</h1> <b> PID </b> HT0154 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> BRIONES VALLEY (1993) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 53 24. (N) 122 11 53. (W) SCALED <br> <b> NAVD 88 </b> 115.19 (+/-2cm) 377.9 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.16 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 655,620. </td><td> 1,850,650. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 114.344 (m) 375.14 (f) ADJ UNCH 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEG705939(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 30 = SET IN A LIGHT STRUCTURE <br>SP_SET: CONCRETE MANHOLE <br>STAMPING: 0+47.81 <br>STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>EBMUD</td></tr><tr><td>1935 </td><td>MARK NOT FOUND </td><td>NGS</td></tr><tr><td>1962 </td><td>MARK NOT FOUND </td><td>NGS</td></tr><tr><td>1987 </td><td>MARK NOT FOUND </td><td>USPSQD</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1935 0.5 MI NW FROM ORINDA. 0.5 MILE NORTHWEST ALONG SAN PABLO CREEK ROAD FROM ORINDA, CONTRA COSTA COUNTY, AT THE FAST BAY MUNICIPAL UTILITY DISTRICT ORINDA FILTER PLANT, 300 FEET NORTHEAST OF THE ROAD, 13-1/2 FEET SOUTH OF THE SOUTHWEST CORNER OF THE CONCRETE SCREENING CHAMBER, AND IN THE TOP OF A CONCRETE MANHOLE. AN EAST BAY MUNICIPAL UTILITY DISTRICT STANDARD DISK, STAMPED 0+47.81. NOTE-- THERE IS NEW CONCRETE OVER THE MANHOLE WHERE THE MARK WAS DESCRIBED. <p> <h2>STATION RECOVERY (1962) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1962 MARK NOT FOUND. <p> <h2>STATION RECOVERY (1987) </h2> <p>RECOVERY NOTE BY US POWER SQUADRON 1987 (CAP) MARK NOT FOUND. HT0111 1 C OF WC http://www.geocaching.com/mark/details.asp?PID=HT0111 1 C OF WC Geocache Geocache 1 C OF WC CA4070 Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>1 C OF WC</h1> <b> PID </b> HT0111 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> WALNUT CREEK (1995) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 54 24. (N) 122 03 51. (W) SCALED <br> <b> NAVD 88 </b> 50.51 (+/-2cm) 165.7 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.13 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 657,260. </td><td> 1,862,460. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 49.696 (m) 163.04 (f) ADJ UNCH 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEG822958(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT <br>SP_SET: SET IN TOP OF CONCRETE MONUMENT <br>STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO <br>STABILITY: SURFACE MOTION <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>CA4070</td></tr><tr><td>1958 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1987 </td><td>MARK NOT FOUND </td><td>USPSQD</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1958 AT WALNUT CREEK. AT WALNUT CREEK, 225 FEET NORTHEAST OF THE CENTER OF THE INTERSECTION OF NORTH MAIN STREET AND YGNACIO VALLEY ROAD, ALONG THE CENTER LINE OF THE ROAD, IN A WELL, AND SET IN THE TOP OF A CONCRETE POST 1 FOOT UNDERGROUND. AN 8-INCH CAST IRON PLATE SCRIBED CITY MONUMENT COVERS THE MARK. <p> <h2>STATION RECOVERY (1987) </h2> <p>RECOVERY NOTE BY US POWER SQUADRON 1987 (RAS) MARK NOT FOUND. HT0116 1 CC CO http://www.geocaching.com/mark/details.asp?PID=HT0116 1 CC CO Geocache Geocache 1 CC CO CA-013 Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>1 CC CO</h1> <b> PID </b> HT0116 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> WALNUT CREEK (1995) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 55 35. (N) 122 03 44. (W) SCALED <br> <b> NAVD 88 </b> 32.92 (+/-2cm) 108.0 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.11 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 659,450. </td><td> 1,862,670. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 32.108 (m) 105.34 (f) ADJ UNCH 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEG824980(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT <br>SP_SET: SET IN TOP OF CONCRETE MONUMENT <br>STAMPING: CONTROL MON CC CO <br>STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO <br>STABILITY: SURFACE MOTION <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>CA-013</td></tr><tr><td>1958 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1987 </td><td>MARK NOT FOUND </td><td>USPSQD</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1958 1.8 MI N FROM WALNUT CREEK. 1.8 MILES NORTH ALONG NORTH MAIN STREET FROM THE CITY HALL AT WALNUT CREEK, 84 FEET WEST OF THE CENTER OF THE INTERSECTION OF GEARY ROAD, 3 1/2 FEET SOUTH OF THE CENTER LINE OF GEARY ROAD, 1 1/2 FEET UNDERGROUND, AND SET IN THE TOP OF A CONCRETE POST. NOTE-- ACCESS TO THE MARK MAY BE HAD THROUGH A 12-INCH CAST IRON COVER BEARING THE WORD MONUMENT. <p> <h2>STATION RECOVERY (1987) </h2> <p>RECOVERY NOTE BY US POWER SQUADRON 1987 (RAS) MARK NOT FOUND. JS1854 1 GPCC http://www.geocaching.com/mark/details.asp?PID=JS1854 1 GPCC Geocache Geocache 1 GPCC GPCC Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>1 GPCC</h1> <b> PID </b> JS1854 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> HONKER BAY (1980) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 38 02 51. (N) 121 59 16. (W) SCALED <br> <b> NAVD 88 </b> 3.19 (+/-2cm) 10.5 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.16 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 672,780. </td><td> 1,869,420. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 2.412 (m) 7.91 (f) ADJ UNCH 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEH888115(NAD 83) <br>MARKER: Z = SEE DESCRIPTION <br>SETTING: 36 = SET IN A MASSIVE STRUCTURE <br>SP_SET: BUILDING FOUNDATION <br>STAMPING: NO 1 <br>STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>GPCC</td></tr><tr><td>1956 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1964 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1956 1.9 MI E FROM PORT CHICAGO. 1.8 MILE EAST ALONG THE SOUTHERN PACIFIC COMPANY RAILROAD FROM THE STATION AT PORT CHICAGO, THENCE 0.1 MILE NORTH ALONG NICHOLS ROAD, AT THE GENERAL CHEMICAL DIVISION OF ALLIED CHEMICAL AND DYE CORPORATION, IN THE TOP OF A LEDGE AT THE SOUTHEAST CORNER OF THE CONCRETE FOUNDATION OF THE ENGINEERING BUILDING, 1.1 FEET NORTHEAST OF THE SOUTHEAST CORNER OF THE LEDGE, 0.9 FOOT EAST OF THE EAST BRICK WALL, AND ABOUT 0.3 FOOT HIGHER THAN AN ASPHALT DRIVEWAY. <p> <h2>STATION RECOVERY (1964) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1964 RECOVERED IN GOOD CONDITION. HS3771 1 USBR http://www.geocaching.com/mark/details.asp?PID=HS3771 1 USBR Geocache Geocache 1 USBR BOR Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>1 USBR</h1> <b> PID </b> HS3771 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> BRENTWOOD (1978) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 58 34. (N) 121 38 22. (W) SCALED <br> <b> NAVD 88 </b> 3.52 (+/-2cm) 11.5 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.37 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> SECOND CLASS 0 (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 664,430. </td><td> 1,899,900. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 2.80 (m) 9.2 (f) COMPUTED 2 0 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SFH194040(NAD 83) <br>MARKER: Z = SEE DESCRIPTION <br>SETTING: 30 = SET IN A LIGHT STRUCTURE <br>SP_SET: COTTONWOOD TREE <br>STAMPING: R SL 1 <br>STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>BOR</td></tr><tr><td>1964 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1966 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1964 2.1 MI E FROM KNIGHTSEN. 0.3 MILES NORTHWEST ALONG THE ATCHISON, TOPEKA AND SANTA FE RAILROAD FROM THE STATION AT KNIGHTSEN, THENCE 0.2 MILES NORTH ALONG KNIGHTSEN ROAD, THENCE 1.5 MILES EAST ALONG TULE LANE, THENCE ABOUT 100 YARDS EAST ALONG A TRACK ROAD ON THE NORTH LEVEE OF ROCK SLOUGH, 0.15 MILES SOUTHEAST OF U.S. BUREAU OF RECLAMATION FISH SCREEN ACROSS THE CONTRA COSTA CANAL, ABOUT 100 YARDS EAST OF THE CONTRA COSTA CANAL INTAKE AT A U.S.B.R. GAGING STATION, 23 FEET SOUTH OF THE CENTER OF THE LEVEE ROAD, 8.6 FEET WEST OF THE CENTER OF THE DOOR TO THE GAGE HOUSE, 14.7 FEET NORTHEAST OF THE WITNESS POST WEDGED IN A COTTONWOOD TREE AND PAINTED USBR B.M. NO. 1, ABOUT LEVEL WITH THE ROAD, AND SCREWED IN THE TOP OF A 3-INCH IRON PIPE ENCASED IN CONCRETE AND PROJECTING 0.4 FEET. <p> <h2>STATION RECOVERY (1966) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1966 RECOVERED IN GOOD CONDITION. HS3447 1 USBR http://www.geocaching.com/mark/details.asp?PID=HS3447 1 USBR Geocache Geocache 1 USBR BOR Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>1 USBR</h1> <b> PID </b> HS3447 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> CLIFTON COURT FOREBAY (1978) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 49 01. (N) 121 33 30. (W) SCALED <br> <b> NAVD 88 </b> 3.25 (+/-2cm) 10.7 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.22 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 646,680. </td><td> 1,906,820. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 2.53 (m) 8.3 (f) COMPUTED 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SFG268864(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 30 = SET IN A LIGHT STRUCTURE <br>SP_SET: TRASH COLLECTING RACK HEAD WAL <br>STAMPING: 1 <br>STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>BOR</td></tr><tr><td>1957 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1971 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1957 0.8 MI SW FROM CLIFTON COURT FERRY. 0.8 MILE SOUTHWEST ALONG HERDLYN ROAD FROM THE CLIFTON COURT FERRY OVER OLD RIVER, AT THE SOUTHEAST CORNER OF CLIFTON COURT TRACT, AT THE FISH COLLECTING FACILITIES OF THE DELTA-MENDOTA CANAL, IN THE TOP OF THE NORTHWEST END OF THE NORTHEAST CONCRETE HEAD WALL OF THE TRASH COLLECTING RACK, 2.3 FEET NORTHEAST OF THE NORTHEAST RAIL OF THE TRASH RAKE, AND ABOUT 1/2 FOOT HIGHER THAN THE CONCRETE FLOOR. <p> <h2>STATION RECOVERY (1971) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1971 RECOVERED IN GOOD CONDITION. HT0172 10 EBMUD http://www.geocaching.com/mark/details.asp?PID=HT0172 10 EBMUD Geocache Geocache 10 EBMUD EBMUD Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>10 EBMUD</h1> <b> PID </b> HT0172 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> OAKLAND EAST (1997) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 49 48. (N) 122 09 57. (W) SCALED <br> <b> NAVD 88 </b> 191.97 (+/-2cm) 629.8 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.17 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 648,910. </td><td> 1,853,370. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 191.112 (m) 627.01 (f) ADJ UNCH 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEG734872(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT <br>SP_SET: SET IN TOP OF CONCRETE MONUMENT <br>STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO <br>STABILITY: SURFACE MOTION <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>EBMUD</td></tr><tr><td>1962 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1962 3.4 MI W FROM MORAGA. 1.9 MILES SOUTHWEST ALONG CANYON ROAD FROM THE POST OFFICE AT MORAGA, THENCE 1.5 MILES NORTHWEST ALONG PINEHURST ROAD, 118 FEET SOUTHWEST OF AND ACROSS THE ROAD FROM THE CANYON STORE, 40.7 FEET SOUTHWEST OF THE CENTERLINE OF THE ROAD, 27.2 FEET WEST OF BENCH MARK T 571 (EBMUD), 13.7 FEET SOUTHWEST OF A FENCE LINE, 1.0 FOOT NORTHEAST OF A WOODEN WITNESS POST, AND SET IN THE TOP OF A CONCRETE POST FLUSH WITH THE GROUND. JT0382 10 USN http://www.geocaching.com/mark/details.asp?PID=JT0382 10 USN Geocache Geocache 10 USN DOD Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>10 USN</h1> <b> PID </b> JT0382 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> VINE HILL (1980) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 38 02 45. (N) 122 01 46. (W) SCALED <br> <b> NAVD 88 </b> 3.69 (+/-2cm) 12.1 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.16 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 672,660. </td><td> 1,865,760. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 2.90 (m) 9.5 (f) COMPUTED 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEH851113(NAD 83) <br>MARKER: B = BOLT <br>SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT <br>SP_SET: SET IN TOP OF CONCRETE MONUMENT <br>STAMPING: CT 41 <br>STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO <br>STABILITY: SURFACE MOTION <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>DOD</td></tr><tr><td>1951 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1962 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1951 0.5 MI W FROM PORT CHICAGO. ABOUT 0.5 MILE WEST ALONG THE SOUTHERN PACIFIC RAILROAD FROM THE STATION AT PORT CHICAGO, BETWEEN THE TRACKS AND GATE 16 TO THE U.S. NAVAL MAGAZINE, 180.4 FEET SOUTH OF THE CENTER OF THE GATE, 39.5 FEET WEST OF A POWER LINE POLE, 33.0 FEET EAST OF THE CENTER LINE OF A ROAD INTO GATE 16, 22.3 FEET NORTH OF THE CENTER LINE OF AN ASPHALT ROAD PARALLELING THE TRACKS, IN THE TOP OF A CONCRETE POST ABOUT 0.2 FOOT BELOW THE SURFACE OF THE PAVEMENT AND PROTECTED BY A 2-BY-12 INCH CAST IRON COVER. NOTE-- REPORTED IN SEPTEMBER 1956 THAT THE BOLT IS STAMPED CT 41. <p> <h2>STATION RECOVERY (1962) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1962 RECOVERED IN GOOD CONDITION. HT0910 102.30 EBMUD http://www.geocaching.com/mark/details.asp?PID=HT0910 102.30 EBMUD Geocache Geocache 102.30 EBMUD EBMUD Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>102.30 EBMUD</h1> <b> PID </b> HT0910 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> RICHMOND (1993) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 57 07. (N) 122 19 58. (W) SCALED <br> <b> NAVD 88 </b> 32.02 (+/-2cm) 105.1 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.26 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS I (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 662,720. </td><td> 1,838,940. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 31.197 (m) 102.35 (f) ADJ UNCH 1 1 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEH586006(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 36 = SET IN A MASSIVE STRUCTURE <br>SP_SET: BRIDGE <br>STAMPING: 102.30 <br>STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>EBMUD</td></tr><tr><td>1956 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1969 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1987 </td><td>MARK NOT FOUND </td><td>USPSQD</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1956 AT SAN PABLO. AT SAN PABLO, IN R4W T1N, ALONG SAN PABLO AVENUE, AT THE Y JUNCTION OF DAM ROAD AND RIVERSIDE AVENUE, AT BRIDGE 28-01 OVER WILDCAT CREEK, IN THE TOP OF THE NORTH END OF THE NORTHEAST CONCRETE SIDEWALK, 31 1/2 FEET NORTHEAST OF THE CENTER LINE OF SAN PABLO AVENUE, 3.3 EAST OF THE EAST EDGE OF A 4-INCH STEEL POLE SUPPORTING A TRAFFIC SIGNAL, 0.9 FOOT SOUTHWEST OF THE NORTHWEST CORNER OF THE NORTHEAST CONCRETE GUARDRAIL, AND ABOUT 1/2 FOOT HIGHER THAN SAN PABLO AVENUE. <p> <h2>STATION RECOVERY (1969) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1969 RECOVERED IN GOOD CONDITION. <p> <h2>STATION RECOVERY (1987) </h2> <p>RECOVERY NOTE BY US POWER SQUADRON 1987 (RAS) MARK NOT FOUND. JT0390 11 USE http://www.geocaching.com/mark/details.asp?PID=JT0390 11 USE Geocache Geocache 11 USE DOD Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>11 USE</h1> <b> PID </b> JT0390 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> VINE HILL (1980) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 38 02 53. (N) 122 01 15. (W) SCALED <br> <b> NAVD 88 </b> 3.25 (+/-2cm) 10.7 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.16 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 672,890. </td><td> 1,866,520. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 2.46 (m) 8.1 (f) COMPUTED 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEH859115(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT <br>SP_SET: SET IN TOP OF CONCRETE MONUMENT <br>STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO <br>STABILITY: SURFACE MOTION <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>DOD</td></tr><tr><td>1964 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1987 </td><td>GOOD </td><td>USPSQD</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1964 AT PORT CHICAGO. AT PORT CHICAGO, ALONG THE SOUTHERN PACIFIC RAILROAD, 97.7 FEET NORTH OF THE NORTHWEST CORNER OF THE RAILROAD STATION, 43.2 FEET NORTH OF THE NORTH RAIL OF THE MAIN TRACKS, 19.7 FEET SOUTH OF THE CENTER LINE OF A PAVED COUNTY ROAD, 8 1/2 FEET WEST OF A TELEGRAPH POLE, 30.8 FEET SOUTHWEST OF AN AUTOMATIC RAILROAD SIGNAL NO. B-41.2, 1.6 FEET EAST OF A POINT IN LINE WITH THE EAST WALL OF THE RAILROAD STATION, ABOUT LEVEL WITH THE TRACKS AND THE ROAD, AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.2 FOOT ABOVE THE GROUND. <p> <h2>STATION RECOVERY (1987) </h2> <p>RECOVERY NOTE BY US POWER SQUADRON 1987 (RAS) RECOVERED IN GOOD CONDITION. HS3769 11.19 USBR http://www.geocaching.com/mark/details.asp?PID=HS3769 11.19 USBR Geocache Geocache 11.19 USBR BOR BOR Unknown Cache Regular 1 1 United States California NGS Datasheet <b> HT_MOD </b> This is a Height Modernization Survey Station. <br> <h1>11.19 USBR</h1> <b> PID </b> HS3769 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> BRENTWOOD (1978) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1992)</b> 37 58 37.53958(N) 121 38 31.53731(W) ADJUSTED <br> <b> NAVD 88 </b> 4.21 (meters) 13.8 (feet) GPS OBS <br> <hr> <b> EPOCH DATE </b> 1997.30 <br> <b> X </b> -2,640,879.648 (meters) COMP <br> <b> Y </b> -4,285,630.538 (meters) COMP <br> <b> Z </b> 3,903,422.873 (meters) COMP <br> <b> LAPLACE CORR</b> 0.72 (seconds) DEFLEC99 <br> <b> ELLIP HEIGHT</b> -28.13 (meters) (07/10/98) GPS OBS <br> <b> GEOID HEIGHT</b> -32.37 (meters) GEOID03 <br> <p> <b> HORZ ORDER </b> FIRST <br> <b> VERT ORDER </b> SECOND CLASS 0 (See Below) <br> <b> ELLP ORDER </b> FOURTH CLASS I <br> <p>The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in July 1998. The horizontal coordinates are valid at the epoch date displayed above. The epoch date for horizontal control is a decimal equivalence of Year/Month/Day. <p>The orthometric height was determined by GPS observations and a high-resolution geoid model using precise GPS observation and processing techniques. The vertical order pertains to the NGVD 29 superseded value. <p>The X, Y, and Z were computed from the position and the ellipsoidal ht. <p>The Laplace correction was computed from DEFLEC99 derived deflections. <p>The ellipsoidal height was determined by GPS observations and is referenced to NAD 83. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td>Units</td><td>Scale Fact</td><td>r Converg.</td></tr><tr><td>SPC CA 3 </td><td> 664,542.721 1</td><td>899,664.725</td><td> MT </td><td>0.99993693</td><td> -0 ' 41 57.2"</td></tr><tr><td>SPC CA 3 </td><td>2,180,253.91 6</td><td>232,483.35 </td><td> sFT </td><td>0.99993693</td><td> -0 ' 41 57.2"</td></tr><tr><td>UTM 10 </td><td>4,204,143.312 </td><td>619,260.356</td><td> MT </td><td>0.99977518</td><td> +0 ' 50 08.5"</td></tr> </table> <p> <b> </b> Elev Factor x Scale Factor = Combined Factor <br> <b>SPC CA 3 </b> 1.00000441 x 0.99993693 = 0.99994134 <br> <b>UTM 10 </b> 1.00000441 x 0.99977518 = 0.99977959 <br> <p> <h2>Superseded Survey Control</h2> <p> <b> NAD 83(1992)</b> 37 58 37.53916(N) 121 38 31.53764(W) AD(1997.30) 1 <br> ELLIP H (05/14/98) -28.04 (m) GP(1997.30) 3 1 <br> NGVD 29 (??/??/92) 3.421 (m) 11.22 (f) ADJ UNCH 2 0 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SFH1926004143(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 36 = SET IN A MASSIVE STRUCTURE <br>SP_SET: CONTRA COSTA CANAL FISH SCREEN <br>STAMPING: 11.19 <br>MARK LOGO: BOR <br>MAGNETIC: N = NO MAGNETIC MATERIAL <br>STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL <br>SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR <br>SATELLITE: SATELLITE OBSERVATIONS - October 28, 1997 <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>BOR</td></tr><tr><td>1963 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1966 </td><td>GOOD </td><td>NGS</td></tr><tr><td>19971028</td><td>GOOD </td><td>BOR</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1963 2 MI E FROM KNIGHTSEN. 0.3 MILE NORTHWEST ALONG THE ATCHINSON, TOPEKA AND SANTA FE RAILROAD FROM THE STATION AT KNIGHTSEN, THENCE 0.2 MILE NORTH ALONG KNIGHTSEN AVENUE, THENCE 1.5 MILES EAST ALONG TULE LANE, THENCE ABOUT 140 YARDS NORTHWEST ALONG THE CONTRA COSTA CANAL, AT THE CONTRA COSTA CANAL FISH SCREEN, IN THE TOP OF THE SOUTHEAST END OF THE NORTHEAST CONCRETE ABUTMENT FOR THE HEADGATE STRUCTURE, 68-1/2 FEET SOUTHWEST OF THE DIRT ROAD ON THE NORTHEAST LEVEE, 3.6 FEET SOUTHEAST OF THE SOUTHEAST END OF A GATE ACROSS THE NORTHEAST END OF THE SOUTHEAST WALKWAY, 1.1 FEET NORTH OF AN IRON GUARD RAIL POST, AND ABOUT LEVEL WITH THE LEVEE ROAD. <p> <h2>STATION RECOVERY (1966) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1966 RECOVERED IN GOOD CONDITION. <p> <h2>STATION RECOVERY (1997) </h2> <p>RECOVERY NOTE BY US BUREAU OF RECLAMATION 1997 (DWS) THE STATION WAS RECOVERED AND A COMPLETE NEW DESCRIPTION FOLLOWS. THE STATION IS ABOUT 4.2 MI (6.8 KM) NORTHEAST OF BRENTWOOD, ABOUT 4.15 MI (6.68 KM) EAST-SOUTHEAST OF OAKLEY, AND ABOUT 2.7 MI (4.3 KM) SOUTH OF BETHEL ISLAND, AT THE START OF THE CONTRA COSTA CANAL OFF OF ROCK SLOUGH. TO REACH THE STATION FROM THE INTERSECTION OF STATE HIGHWAY 4 AND CYPRESS ROAD IN THE CITY OF OAKLEY, EAST OF ANTIOCH, GO EAST ON CYPRESS ROAD FOR 2.12 MI (3.41 KM) PAST THE INTERSECTION OF JERSEY ISLAND ROAD ON THE LEFT TO THE CONTRA COSTA CANAL. TURN RIGHT AND GO SOUTHEAST, THROUGH TWO LOCKED GATES, ALONG THE NORTHEAST SIDE OF THE CANAL FOR ABOUT 1.33 MI (2.14 KM) TO THE CONTRA COSTA CANAL TRASH RACK/INTAKE STRUCTURE AND THE STATION ON THE RIGHT. THE STATION IS A BUREAU OF RECLAMATION SURVEY DISK CEMENTED FLUSH ON THE CONCRETE CURBING ON THE SOUTHEAST END OF THE NORTHEAST ABUTMENT OF THE STRUCTURE, ABOUT 68.5 FT (20.9 M) SOUTHWEST OF THE DIRT ROAD ON THE NORTHEAST LEVEE, 55.2 FT (16.8 M) SOUTHWEST OF THE SOUTHEAST CORNER OF THE STRUCTURE, IN THE CORNER OF THE CURB, 1.64 FT (0.50 M) NORTHWEST OF THE UPSTREAM FACE OF THE CURB, 1.45 FT (0.44 M) NORTHEAST OF THE SOUTHWEST FACE, ABOUT 1.35 FT (0.41 M) ABOVE THE GROUND, 1.0 FT (0.3 M) NORTH OF THE CORNER POST OF THE RAILING, AND ABOUT A FOOT FROM A CARSONITE WITNESS POST. THE STATION WAS OCCUPIED AS PART OF THE SAN JOAQUIN-SACRAMENTO RIVER DELTA GPS/VERTICAL PROJECT. HS3746 11.26 EBMUD http://www.geocaching.com/mark/details.asp?PID=HS3746 11.26 EBMUD Geocache Geocache 11.26 EBMUD EBMUD EBMUD Unknown Cache Regular 1 1 United States California NGS Datasheet <b> HT_MOD </b> This is a Height Modernization Survey Station. <br> <h1>11.26 EBMUD</h1> <b> PID </b> HS3746 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> WOODWARD ISLAND (1978) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1998)</b> 37 56 21.83948(N) 121 36 53.90457(W) ADJUSTED <br> <b> NAVD 88 </b> 4.21 (meters) 13.8 (feet) GPS OBS <br> <hr> <b> EPOCH DATE </b> 2000.86 <br> <b> X </b> -2,640,199.863 (meters) COMP <br> <b> Y </b> -4,289,071.661 (meters) COMP <br> <b> Z </b> 3,900,124.071 (meters) COMP <br> <b> LAPLACE CORR</b> 0.55 (seconds) DEFLEC99 <br> <b> ELLIP HEIGHT</b> -28.07 (meters) (11/27/02) GPS OBS <br> <b> GEOID HEIGHT</b> -32.34 (meters) GEOID03 <br> <p> <b> HORZ ORDER </b> B <br> <b> VERT ORDER </b> SECOND CLASS 0 (See Below) <br> <b> ELLP ORDER </b> FOURTH CLASS I <br> <p>The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in November 2002. This is a SPECIAL STATUS position. See SPECIAL STATUS under the DATUM ITEM on the data sheet items page. The horizontal coordinates are valid at the epoch date displayed above. The epoch date for horizontal control is a decimal equivalence of Year/Month/Day. <p>The orthometric height was determined by GPS observations and a high-resolution geoid model using precise GPS observation and processing techniques. The vertical order pertains to the NGVD 29 superseded value. <p>The X, Y, and Z were computed from the position and the ellipsoidal ht. <p>The Laplace correction was computed from DEFLEC99 derived deflections. <p>The ellipsoidal height was determined by GPS observations and is referenced to NAD 83. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td>Units</td><td>Scale Fact</td><td>r Converg.</td></tr><tr><td>SPC CA 3 </td><td> 660,330.632 1</td><td>901,997.334</td><td> MT </td><td>0.99993456</td><td> -0 ' 40 57.4"</td></tr><tr><td>SPC CA 3 </td><td>2,166,434.75 6</td><td>240,136.25 </td><td> sFT </td><td>0.99993456</td><td> -0 ' 40 57.4"</td></tr><tr><td>UTM 10 </td><td>4,199,995.853 </td><td>621,704.546</td><td> MT </td><td>0.99978243</td><td> +0 ' 51 06.0"</td></tr> </table> <p> <b> </b> Elev Factor x Scale Factor = Combined Factor <br> <b>SPC CA 3 </b> 1.00000440 x 0.99993456 = 0.99993896 <br> <b>UTM 10 </b> 1.00000440 x 0.99978243 = 0.99978683 <br> <p> <h2>Superseded Survey Control</h2> <p> <b> NAD 83(1992)</b> 37 56 21.83814(N) 121 36 53.90361(W) AD(1997.30) 1 <br> ELLIP H (07/10/98) -28.11 (m) GP(1997.30) 4 1 <br> <b> NAD 83(1992)</b> 37 56 21.83774(N) 121 36 53.90393(W) AD(1997.30) 1 <br> ELLIP H (05/14/98) -28.02 (m) GP(1997.30) 3 1 <br> NGVD 29 (??/??/92) 3.420 (m) 11.22 (f) ADJ UNCH 2 0 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SFG2170599996(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 30 = SET IN A LIGHT STRUCTURE <br>SP_SET: LIGHT STRUCTURE <br>STAMPING: STA P 2689 00.63 F ELEV 11.26 <br>MARK LOGO: EBMUD <br>MAGNETIC: N = NO MAGNETIC MATERIAL <br>STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO <br>STABILITY: SURFACE MOTION <br>SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR <br>SATELLITE: SATELLITE OBSERVATIONS - August 17, 2004 <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>1930 </td><td>MONUMENTED </td><td>EBMUD</td></tr><tr><td>1951 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1966 </td><td>GOOD </td><td>NGS</td></tr><tr><td>19970814</td><td>GOOD </td><td>BOR</td></tr><tr><td>20010114</td><td>GOOD </td><td>FRAME</td></tr><tr><td>20040817</td><td>GOOD </td><td>BESTOR</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1951 2.9 MI W FROM ORWOOD. 2.9 MILES WEST ALONG THE ATCHISON, TOPEKA, AND SANTA FE RAILROAD FROM THE WEST END OF THE DRAWBRIDGE OVER THE OLD RIVER AT ORWOOD, 3.5 MILES SOUTHEAST OF KNIGHTSEN, ABOUT 85 YARDS SOUTH OF THE TRACK, AT THE POINT WHERE THE NORTH PIPE OF EAST BAY MUNICIPAL UTILITY DISTRICT 60-INCH TWIN PIPES GOES UNDERGROUND, IN THE TOP OF THE CENTER OF THE CONCRETE COLLAR, 49 1/2 FEET NORTH OF THE CENTER OF A T JUNCTION OF ORWOOD ROAD AND A TRACK ROAD LEADING SOUTH, 61.2 FEET NORTHWEST OF A TELEPHONE POLE, ABOUT 3 FEET HIGHER THAN THE ROAD, AND SET ABOUT 3 FEET LOWER THAN THE TRACK. <p> <h2>STATION RECOVERY (1966) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1966 RECOVERED IN GOOD CONDITION. <p> <h2>STATION RECOVERY (1997) </h2> <p>RECOVERY NOTE BY US BUREAU OF RECLAMATION 1997 (DWS) THE STATION WAS RECOVERED AND A COMPLETE NEW DESCRIPTION FOLLOWS. THE STATION IS ALONG THE MOKELUMNE AQUEDUCT PIPELINE OF THE EAST BAY MUNICIPAL UTILITY DISTRICT, ABOUT 4.2 MI (6.8 KM) EAST OF BRENTWOOD AND ABOUT 3.5 MI (5.6 KM) SOUTHEAST OF KNIGHTSEN. TO REACH THE STATION FROM BRENTWOOD, GO EAST ON CHESTNUT STREET FOR ABOUT 2.8 MI (4.5 KM) TO THE T-INTERSECTION OF THE BYRON HIGHWAY. TURN LEFT AND GO NORTH FOR ABOUT 0.5 MI (0.8 KM) TO A SIDE ROAD RIGHT, ORWOOD ROAD. TURN RIGHT AND GO EAST ON ORWOOD ROAD FOR 1.0 MI (1.6 KM) TO BIXLER ROAD ON THE LEFT, A SOUTH JOG IN THE ROAD, AND BIXLER ROAD ON THE RIGHT. CONTINUE EAST ON ORWOOD ROAD FOR 0.46 MI (0.74 KM) TO THE STATION ON THE LEFT, WHERE TWO 54-INCH MOKELUMNE AQUEDUCT PIPES GO UNDERGROUND ACROSS FROM A RESIDENCE AT 4401 ORWOOD ROAD. THE STATION IS ABOUT 315 FT (96.0 M) WEST OF A LARGE PIPELINE GATEHOUSE, 255 FT (77.7 M) SOUTH OF THE RAILROAD TRACKS, IN THE CENTER OF THE TOP OF THE CONCRETE HEADWALL 1-FT THICK AND 21-FT LONG AROUND THE SOUTHERLY OF TWO AQUEDUCT PIPES, 49 FT (14.9 M) NORTH OF THE CENTERLINE OF ORWOOD ROAD, 17.8 FT (5.4 M) EAST-SOUTHEAST OF THE END OF A 4.7 FT (1.4 M) HIGH WALL EXTENDING SOUTH 4.0 FT (1.2 M) FROM THE SOUTHEAST CORNER OF A 9 BY 13-FT CONCRETE UNDERGROUND PIPELINE ACCESS STRUCTURE OVER THE NORTH PIPE, 2 FT (0.6 M) HIGHER THAN THE LEVEL OF ORWOOD ROAD, AND 1.5 FT (0.5 M) HIGHER THAN THE TOP OF THE PIPELINE. THE STATION WAS OCCUPIED AS PART OF THE SAN JOAQUIN-SACRAMENTO RIVER DELTA GPS/VERTICAL PROJECT. <p> <h2>STATION RECOVERY (2001) </h2> <p>RECOVERY NOTE BY FRAME SURVEYING AND MAPPING 2001 (JHF) RECOVERED AS DESCRIBED. <p> <h2>STATION RECOVERY (2004) </h2> <p>RECOVERY NOTE BY BESTOR ENGINEERS INCORPORATED 2004 (DT) RECOVERED IN GOOD CONDITION. HS3614 123.11 USBR http://www.geocaching.com/mark/details.asp?PID=HS3614 123.11 USBR Geocache Geocache 123.11 USBR BOR Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>123.11 USBR</h1> <b> PID </b> HS3614 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> ANTIOCH SOUTH (1980) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 58 56. (N) 121 48 20. (W) SCALED <br> <b> NAVD 88 </b> 38.31 (+/-2cm) 125.7 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.23 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 665,300. </td><td> 1,885,310. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 37.555 (m) 123.21 (f) ADJ UNCH 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SFH048045(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 30 = SET IN A LIGHT STRUCTURE <br>SP_SET: CONCRETE SIPHON <br>STAMPING: 123.11 <br>STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>BOR</td></tr><tr><td>1960 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1963 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1960 1.4 MI S FROM ANTIOCH. 0.15 MILE SOUTH ALONG A STREET FROM THE CROSSING OF THE SOUTHERN PACIFIC RAILROAD AT ANTIOCH, THENCE 0.15 MILE SOUTHWEST ALONG STATE HIGHWAY 4 AND 24 FREEWAY, THENCE 1.1 MILES SOUTH ALONG LONE TREE WAY, IN R2E T2N S31, AT THE CROSSING OF CONTRA COSTA CANAL, IN TOP OF THE CENTER OF THE EAST CONCRETE HEAD WALL OF CONCRETE SIPHON 10.45, 32 1/2 FEET EAST OF THE CENTER LINE OF THE WAY, 4.6 FEET EAST OF A FENCE, AND ABOUT 1/2 FOOT LOWER THAN THE WAY. <p> <h2>STATION RECOVERY (1963) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1963 RECOVERED IN GOOD CONDITION. JT0489 12.63 SHELL OIL CO http://www.geocaching.com/mark/details.asp?PID=JT0489 12.63 SHELL OIL CO Geocache Geocache 12.63 SHELL OIL CO SHELL Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>12.63 SHELL OIL CO</h1> <b> PID </b> JT0489 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> BENICIA (1980) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 38 01 25. (N) 122 07 41. (W) SCALED <br> <b> NAVD 88 </b> 4.62 (+/-2cm) 15.2 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.11 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> THIRD (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 670,340. </td><td> 1,857,070. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/??) 3.81 (m) 12.5 (f) RESET 3 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEH765087(NAD 83) <br>MARKER: B = BOLT <br>SETTING: 36 = SET IN A MASSIVE STRUCTURE <br>SP_SET: VIADUCT <br>STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>SHELL</td></tr><tr><td>1956 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1962 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1956 0.4 MI E FROM MARTINEZ. 0.4 MILE EAST ALONG THE SOUTHERN PACIFIC COMPANY RAILROAD FROM THE STATION AT MARTINEZ, IN R2W T2N S18, IN THE TOP OF THE NORTHEAST CONCRETE BASE FOR THE NORTHEAST STEEL LEG OF THE SHELL OIL COMPANY VIADUCT OVER THE RAILROAD TRACK, 46.4 FEET NORTHWEST OF THE NORTHWEST CORNER OF RAILROAD BRIDGE 32.18, 30.2 FEET NORTH OF THE NORTH RAIL OF THE NORTH SIDE TRACK, ABOUT 1 1/2 FOOT LOWER THAN THE TRACK, AND MARKED BY THE RED NUMBERS 12.63. <p> <h2>STATION RECOVERY (1962) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1962 RECOVERED IN GOOD CONDITION. HT0108 134.19 C OF WC http://www.geocaching.com/mark/details.asp?PID=HT0108 134.19 C OF WC Geocache Geocache 134.19 C OF WC CA4070 Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>134.19 C OF WC</h1> <b> PID </b> HT0108 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> WALNUT CREEK (1995) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 53 58. (N) 122 03 34. (W) SCALED <br> <b> NAVD 88 </b> 41.70 (+/-2cm) 136.8 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.13 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 656,460. </td><td> 1,862,860. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 40.887 (m) 134.14 (f) ADJ UNCH 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEG826950(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 30 = SET IN A LIGHT STRUCTURE <br>SP_SET: CULVERT <br>STAMPING: 134.19 <br>STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>CA4070</td></tr><tr><td>1958 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1958 AT WALNUT CREEK. AT WALNUT CREEK, IN THE CENTER OF THE T JUNCTION OF NORTH BROADWAY AND CYPRESS AVENUE, IN THE TOP OF THE CONCRETE PAVEMENT (ALSO THE TOP FOR A 40-FOOT WIDE CONCRETE BOX CULVERT FOR WALNUT CREEK WHICH FLOWS UNDER BROADWAY). HS3728 1357 USBR http://www.geocaching.com/mark/details.asp?PID=HS3728 1357 USBR Geocache Geocache 1357 USBR BOR Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>1357 USBR</h1> <b> PID </b> HS3728 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> BRENTWOOD (1978) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 59 44. (N) 121 42 06. (W) SCALED <br> <b> NAVD 88 </b> 4.85 (+/-2cm) 15.9 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.38 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> SECOND CLASS 0 (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 666,660. </td><td> 1,894,460. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 4.122 (m) 13.52 (f) ADJ UNCH 2 0 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SFH139061(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 36 = SET IN A MASSIVE STRUCTURE <br>SP_SET: BUILDING <br>STAMPING: 1357 <br>STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>BOR</td></tr><tr><td>1951 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1966 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1951 0.5 MI E FROM OAKLEY. 0.4 MILES EAST ALONG THE ATCHISON, TOPEKA AND SANTA FE RAILROAD FROM THE STATION AT OAKLEY, THENCE 0.1 MILES NORTH ALONG A GRAVELED ROAD ON THE WEST LEVEE OF THE CONTRA COSTA CANAL, AT THE CONTRA COSTA CANAL PUMPING PLANT NO. 1, 23.2 FEET SOUTHEAST OF THE NORTH CORNER OF THE BUILDING, IN THE TOP OF THE NORTHEAST END OF THE NORTHWEST CONCRETE RETAINING WALL, 47 FEET EAST OF THE CENTER LINE OF THE GRAVEL ROAD, 1.3 FEET NORTHEAST OF THE NORTHEAST EDGE OF THE NORTHWEST STEEL LADDER, AND SET ABOUT LEVEL WITH THE GRAVEL ROAD. <p> <h2>STATION RECOVERY (1966) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1966 RECOVERED IN GOOD CONDITION. HS3724 139.51 USBR http://www.geocaching.com/mark/details.asp?PID=HS3724 139.51 USBR Geocache Geocache 139.51 USBR BOR Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>139.51 USBR</h1> <b> PID </b> HS3724 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> ANTIOCH SOUTH (1980) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 59 43. (N) 121 50 51. (W) SCALED <br> <b> NAVD 88 </b> 40.28 (+/-2cm) 132.2 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.18 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 666,800. </td><td> 1,881,650. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 39.522 (m) 129.67 (f) ADJ UNCH 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SFH011059(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 36 = SET IN A MASSIVE STRUCTURE <br>SP_SET: BRIDGE <br>STAMPING: 139.51 <br>STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>BOR</td></tr><tr><td>1957 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1963 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1957 2.5 MI SW FROM ANTIOCH. 0.7 MILE WEST ALONG WEST FOURTH STREET FROM THE POST OFICE AT ANTIOCH, THENCE 1.8 MILES SOUTHWEST ALONG SOMERSVILLE ROAD, IN R1E T2N, IN THE NORTHEAST QUARTER OF SECTION 27, 0.85 MILE SOUTHWEST OF THE CROSSING OF STATE HIGHWAY 4 AND 24, AT A CONCRETE BRIDGE OVER THE CONTRA COSTA CANAL, IN THE TOP OF THE NORTHEAST END OF THE NORTHWEST CONCRETE HEAD WALL, 14 1/2 FEET NORTHWEST OF THE CENTER LINE OF THE ROAD, 8.5 FEET SOUTH OF THE SOUTHWEST END OF A STEEL GATE, AND ABOUT 1 FOOT HIGHER THAN THE ROAD. <p> <h2>STATION RECOVERY (1963) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1963 RECOVERED IN GOOD CONDITION. HT0107 142.29 C OF WC http://www.geocaching.com/mark/details.asp?PID=HT0107 142.29 C OF WC Geocache Geocache 142.29 C OF WC CA4070 Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>142.29 C OF WC</h1> <b> PID </b> HT0107 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> WALNUT CREEK (1995) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 53 52. (N) 122 03 31. (W) SCALED <br> <b> NAVD 88 </b> 44.17 (+/-2cm) 144.9 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.13 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 656,270. </td><td> 1,862,930. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 43.353 (m) 142.23 (f) ADJ UNCH 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEG827948(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 30 = SET IN A LIGHT STRUCTURE <br>SP_SET: CULVERT <br>STAMPING: 142.29 <br>STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>CA4070</td></tr><tr><td>1958 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1987 </td><td>MARK NOT FOUND </td><td>USPSQD</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1958 AT WALNUT CREEK. AT WALNUT CREEK, AT THE CENTER OF THE INTERSECTION OF NORTH BROADWAY AND WALKER AVENUE, IN THE TOP OF THE CONCRETE PAVEMENT WHICH ALSO SERVES AS THE TOP OF A CONCRETE BOX CULVERT FOR UNDERGROUND WALNUT CREEK. <p> <h2>STATION RECOVERY (1987) </h2> <p>RECOVERY NOTE BY US POWER SQUADRON 1987 (CAP) MARK NOT FOUND. JT0389 15 USE http://www.geocaching.com/mark/details.asp?PID=JT0389 15 USE Geocache Geocache 15 USE DOD Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>15 USE</h1> <b> PID </b> JT0389 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> VINE HILL (1980) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 38 03 20. (N) 122 02 21. (W) SCALED <br> <b> NAVD 88 </b> 3.75 (+/-2cm) 12.3 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.16 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 673,750. </td><td> 1,864,930. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 2.97 (m) 9.7 (f) COMPUTED 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEH842124(NAD 83) <br>MARKER: P = PIPE CAP <br>SETTING: 17 = SET INTO TOP OF METAL PIPE DRIVEN INTO GROUND <br>SP_SET: METAL PIPE DRIVEN INTO GROUND <br>STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>DOD</td></tr><tr><td>1956 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1962 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1956 AT PORT CHICAGO. AT PORT CHICAGO, IN R2W T2N S6, AT THE U.S. NAVAL MAGAZINE, 0.85 MILE NORTHWEST ALONG JOHNSON ROAD FROM GATE 16, AT THE NORTHWEST END OF THE ROAD, 34 FEET SOUTHWEST OF THE CENTER LINE OF THE ROAD, 22.3 FEET SOUTH OF THE SOUTH CORNER OF A BARGE PIER, 15.6 FEET NORTHWEST OF A FENCE AROUND BUILDING A-5, 0.4 FOOT SOUTHWEST OF THE SOUTHWEST EDGE OF A SMALL FRAME BUILDING, AND SCREWED ON TOP OF A 1 1/4-INCH GALVANIZED IRON PIPE WHICH PROJECTS 0.5 FOOT ABOVE THE GROUND. <p> <h2>STATION RECOVERY (1962) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1962 RECOVERED IN GOOD CONDITION. HS3416 15 USE http://www.geocaching.com/mark/details.asp?PID=HS3416 15 USE Geocache Geocache 15 USE DOD Unknown Cache Regular 1 1 United States California NGS Datasheet <b> TIDAL BM </b> This is a Tidal Bench Mark. <br> <h1>15 USE</h1> <b> PID </b> HS3416 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> WOODWARD ISLAND (1978) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 56 23. (N) 121 33 35. (W) SCALED <br> <b> NAVD 88 </b> 4.62 (+/-2cm) 15.2 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.30 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS II (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>This Tidal Bench Mark is designated as VM 11856 by the Center for Operational Oceanographic Products and Services. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 660,310. </td><td> 1,906,850. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 3.91 (m) 12.8 (f) COMPUTED 1 2 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SFH265001(NAD 83) <br>MARKER: B = BOLT <br>SETTING: 36 = SET IN A MASSIVE STRUCTURE <br>SP_SET: PIER <br>STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>DOD</td></tr><tr><td>1957 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1963 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1957 AT ORWOOD. AT ORWOOD, AT THE SOUTHEAST CORNER OF PALM TRACT, AT THE WEST END OF THE ATCHISON, TOPEKA AND SANTA FE RAILWAY DRAWBRIDGE OVER OLD RIVER, IN THE TOP OF THE NORTHEAST CORNER OF THE WEST CONCRETE PIER OF THE DRAW SPAN, 8.7 FEET NORTH OF THE NORTH RAIL, 2.0 FEET NORTHEAST OF THE NORTHEAST CORNER OF A STEEL PLLATE, AND ABOUT 4 1/2 FEET LOWER THAN THE TRACK. <p> <h2>STATION RECOVERY (1963) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1963 RECOVERED IN GOOD CONDITION. HS3747 16.38 EBMUD http://www.geocaching.com/mark/details.asp?PID=HS3747 16.38 EBMUD Geocache Geocache 16.38 EBMUD EBMUD Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>16.38 EBMUD</h1> <b> PID </b> HS3747 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> WOODWARD ISLAND (1978) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 56 22. (N) 121 36 35. (W) SCALED <br> <b> NAVD 88 </b> 5.72 (+/-2cm) 18.8 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.34 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> SECOND CLASS 0 (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 660,330. </td><td> 1,902,460. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/92) 5.009 (m) 16.43 (f) ADJ UNCH 2 0 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SFH221000(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 17 = SET INTO TOP OF METAL PIPE DRIVEN INTO GROUND <br>SP_SET: METAL PIPE DRIVEN INTO GROUND <br>STAMPING: STA P 2673 63.37 F 2673 63.37 ELEV 16.38 <br>STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>EBMUD</td></tr><tr><td>1962 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1966 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1962 2.6 MI W FROM ORWOOD. 2.6 MILES WEST ALONG THE ATCHINSON, TOPEKA AND SANTA FE RAILROAD TRACK FROM THE WEST END OF THE DRAWBRIDGE OVER THE OLD RIVER AT ORWOOD, AT THE WERNER SIDING, ABOUT 100 YARDS SOUTHEAST OF MILEPOLE 1139, 258 FEET SOUTH OF THE CENTER OF THE CROSSING OF A GRAVELED ROAD, AT THE CROSSING OF THE GRAVELED ROAD OVER THE EDMUD 60-INCH TWIN PIPES, IN THE TOP OF THE APPROXIMATE CENTER OF THE WEST CONCRETE HEADWALL OF THE NORTH PIPE, 76.1 FEET NORTH OF THE NORTHEAST CORNER OF THE ORWOOD ROAD BRIDGE OVER INDIAN SLOUGH, 87 FEET NORTH OF THE CENTERLINE OF ORWOOD ROAD, 13 FEET WEST OF THE CENTERLINE OF THE GRAVELED ROAD, 38.9 FEET NORTHEAST OF A VALVE ON TOP OF THE NORTH PIPE, ABOUT 2 FEET LOWER THAN THE ROAD, AND 1.6 FEET BELOW THE SURFACE OF THE ROAD SHOUDER. <p> <h2>STATION RECOVERY (1966) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1966 RECOVERED IN GOOD CONDITION. HS3608 165 USGS http://www.geocaching.com/mark/details.asp?PID=HS3608 165 USGS Geocache Geocache 165 USGS USGS Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>165 USGS</h1> <b> PID </b> HS3608 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> BYRON HOT SPRINGS (1968) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 37 51 48. (N) 121 40 41. (W) SCALED <br> <b> NAVD 88 </b> 50.87 (+/-2cm) 166.9 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.18 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> FIRST CLASS I (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 651,960. </td><td> 1,896,350. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/??) 50.121 (m) 164.44 (f) ADJUSTED 1 1 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SFG162914(NAD 83) <br>MARKER: P = PIPE CAP <br>SETTING: 17 = SET INTO TOP OF METAL PIPE DRIVEN INTO GROUND <br>SP_SET: METAL PIPE DRIVEN INTO GROUND <br>STAMPING: 165 CAL 1910 22 <br>STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>1910 </td><td>MONUMENTED </td><td>USGS</td></tr><tr><td>1958 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1966 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1958 2.2 MI W FROM BYRON. 2.2 MILES WEST ALONG CAMINO DIABLO FROM THE CROSSING OF THE SOUTHERN PACIFIC COMPANY RAILROAD AT BYRON, IN R3E T1S S7, AT THE T JUNCTION OF FENCES, 28 1/2 FEET NORTH OF THE CENTER LINE OF CAMINO DIABLO, 107 FEET EAST OF THE CENTER OF THE Y JUNCTION OF A GRAVELED ROAD LEADING SOUTHWEST, 3 FEET WEST OF A FENCE CORNER POST, 0.4 FOOT SOUTH OF A FENCE, 1.0 FOOT WEST OF A WITNESS POST, ABOUT 2 FEET HIGHER THAN CAMINO DIABLO, AND RIVETED ON TOP OF A 3 1/2-INCH IRON PIPE PROJECTING 0.5 FOOT ABOVE THE GROUND. <p> <h2>STATION RECOVERY (1966) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1966 RECOVERED IN GOOD CONDITION. JT0517 17 USGS http://www.geocaching.com/mark/details.asp?PID=JT0517 17 USGS Geocache Geocache 17 USGS USGS Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>17 USGS</h1> <b> PID </b> JT0517 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> BENICIA (1980) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 38 02 46. (N) 122 11 00. (W) SCALED <br> <b> NAVD 88 </b> 6.00 (+/-2cm) 19.7 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.10 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> THIRD (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 672,920. </td><td> 1,852,260. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/??) 5.18 (m) 17.0 (f) RESET 3 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEH716112(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 36 = SET IN A MASSIVE STRUCTURE <br>SP_SET: BUILDING <br>STAMPING: 17.011 <br>STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>USGS</td></tr><tr><td>1951 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1969 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1951 AT PORT COSTA. AT PORT COSTA, NEAR THE SOUTHERN PACIFIC COMPANY RAILROAD STATION, DIRECTLY ACROSS MAIN STREET FROM THE BURLINGTON HOTEL, AT A LARGE CONCRETE BUILDING USED FOR A POST OFFICE AND FIRE STATION, SET VERTICALLY IN THE NORTHWEST CONCRETE WALL, 37.6 FEET SOUTHWEST OF THE NORTH CORNER OF THE BUILDING, 29.0 FEET EAST OF THE CENTER LINE OF MAIN STREET, 13.2 FEET SOUTHWEST OF THE SOUTHWEST EDGE OF THE ENTRANCE TO THE POST OFFICE, AND SET 2.9 FEET ABOVE THE GROUND. <p> <h2>STATION RECOVERY (1969) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1969 RECOVERED IN GOOD CONDITION. JS1753 181 S USE http://www.geocaching.com/mark/details.asp?PID=JS1753 181 S USE Geocache Geocache 181 S USE DOD Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>181 S USE</h1> <b> PID </b> JS1753 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> ANTIOCH NORTH (1978) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 38 01 02. (N) 121 48 41. (W) SCALED <br> <b> NAVD 88 </b> 3.00 (+/-2cm) 9.8 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.30 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> THIRD (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 669,190. </td><td> 1,884,860. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/??) 2.26 (m) 7.4 (f) RESET 3 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SFH043083(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT <br>SP_SET: SET IN TOP OF CONCRETE MONUMENT <br>STAMPING: 181 S <br>STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO <br>STABILITY: SURFACE MOTION <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>DOD</td></tr><tr><td>1960 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1966 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1960 AT ANTIOCH. AT ANTIOCH, 0.3 MILE EAST ALONG THE ATCHISON, TOPEKA AND SANTA FE RAILROAD FROM THE STATION, AT THE NORTH END OF E STREET, AT SIGNAL 11512, 8.2 FEET SOUTH OF THE SOUTH RAIL, 32 FEET WEST OF THE EXTENDED CENTER LINE OF THE STREET, 7.1 FEET EAST OF THE NORTHEAST CORNER OF THE CONCRETE FOUNDATION SUPPORTING THE SIGNAL, 3.0 FEET NORTHEAST OF THE NORTH LEG OF A STEEL LADDER ATTACHED TO THE SIGNAL, 21 1/2 FEET NORTH-NORTHWEST OF TELEGRAPH POLE 7J, 2.5 FEET EAST OF A WITNESS POST, ABOUT 1/2 FOOT LOWER THAN THE TRACK, AND SET IN THE TOP OF A CONCRETE POST 0.2 FOOT UNDERGROUND. <p> <h2>STATION RECOVERY (1966) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1966 RECOVERED IN GOOD CONDITION. JS1754 184 S USE http://www.geocaching.com/mark/details.asp?PID=JS1754 184 S USE Geocache Geocache 184 S USE DOD Unknown Cache Regular 1 1 United States California NGS Datasheet <b> TIDAL BM </b> This is a Tidal Bench Mark. <br> <h1>184 S USE</h1> <b> PID </b> JS1754 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> ANTIOCH NORTH (1978) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1986)</b> 38 00 58. (N) 121 48 19. (W) SCALED <br> <b> NAVD 88 </b> 3.69 (+/-2cm) 12.1 (feet) VERTCON <br> <hr> <b> GEOID HEIGHT</b> -32.31 (meters) GEOID03 <br> <p> <b> VERT ORDER </b> THIRD (See Below) <br> <p>The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the NGVD 29 superseded value. <p>This Tidal Bench Mark is designated as VM 8524 by the Center for Operational Oceanographic Products and Services. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td> Units</td><td> Estimated Accuracy</td></tr><tr><td>SPC CA 3 </td><td> 669,060. </td><td> 1,885,390. </td><td> MT</td><td> (+/- 180 meters Scaled)</td></tr> </table> <p> <h2>Superseded Survey Control</h2> <p> NGVD 29 (??/??/??) 2.95 (m) 9.7 (f) RESET 3 <br> <p>Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived. <p> <h2>Marker Information</h2>U.S. NATIONAL GRID SPATIAL ADDRESS: 10SFH048082(NAD 83) <br>MARKER: DD = SURVEY DISK <br>SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT <br>SP_SET: SET IN TOP OF CONCRETE MONUMENT <br>STAMPING: 184 S <br>STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO <br>STABILITY: SURFACE MOTION <br> </table> <p> <h2>History</h2><table border=1><tr><td>Date </td><td>Condition </td><td>Report By</td></tr><tr><td>UNK </td><td>MONUMENTED </td><td>DOD</td></tr><tr><td>1960 </td><td>GOOD </td><td>NGS</td></tr><tr><td>1966 </td><td>GOOD </td><td>NGS</td></tr> </table> <p> <h2>STATION DESCRIPTION </h2> <p>DESCRIBED BY NATIONAL GEODETIC SURVEY 1960 0.6 MI E FROM ANTIOCH. 0.6 MILE EAST ALONG THE ATCHISON, TOPEKA AND SANTA FE RAILWAY FROM THE STATION ANTIOCH, AT THE EAST END OF A LONG WOODEN TRESSEL OVER A PORTION OF THE SAN JOAQUIN RIVER, 16.5 FEET NORTH OF THE NORTH RAIL, 26 1/2 FEET EAST OF THE NORTHEAST CORNER OF THE TRESSEL, 9 FEET NORTHEAST OF A POLE SUPPORTING A KEEP OFF SIGN, 2.0 FEET SOUTH OF A WITNESS POST, ABOUT 1/2 FOOT LOWER THAN THE TRACK, AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.1 FOOT ABOVE THE GROUND. <p> <h2>STATION RECOVERY (1966) </h2> <p>RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1966 RECOVERED IN GOOD CONDITION. HS5106 1854=WEIDEMANN http://www.geocaching.com/mark/details.asp?PID=HS5106 1854=WEIDEMANN Geocache Geocache 1854=WEIDEMANN CGS Unknown Cache Regular 1 1 United States California NGS Datasheet <h1>1854=WEIDEMANN</h1> <b> PID </b> HS5106 <br> <b> STATE/COUNTY</b> CA/CONTRA COSTA <br> <b> USGS QUAD </b> DUBLIN (1980) <br> <p> <h2>Current Survey Control</h2> <hr> <b> NAD 83(1992)</b> 37 44 17.88860(N) 121 59 41.59439(W) ADJUSTED <br> <b> NAVD 88 </b> 564.8 (meters) 1853. (feet) VERTCON <br> <hr> <b> EPOCH DATE </b> 1991.35 <br> <b> LAPLACE CORR</b> -0.15 (seconds) DEFLEC99 <br> <b> GEOID HEIGHT</b> -32.23 (meters) GEOID03 <br> <p> <b> HORZ ORDER </b> FIRST <br> <p>The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in March 1994. The horizontal coordinates are valid at the epoch date displayed above. The epoch date for horizontal control is a decimal equivalence of Year/Month/Day. <p>The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) <p>The Laplace correction was computed from DEFLEC99 derived deflections. <p>The geoid height was determined by GEOID03. <p> <table border=1><tr><td> </td><td> North </td><td> East </td><td>Units</td><td>Scale Fact</td><td>r Converg.</td></tr><tr><td>SPC CA 3 </td><td> 638,480.149 1</td><td>868,250.083</td><td> MT </td><td>0.99992920</td><td> -0 ' 54 54.8"</td></tr><tr><td>SPC CA 3 </td><td>2,094,746.96 6</td><td>129,417.15 </td><td> sFT </td><td>0.99992920</td><td> -0 ' 54 54.8"</td></tr><tr><td>UTM 10 </td><td>4,177,