GEOSPATIAL SCIENCES CENTER

Transcription

1 GEOSPATIAL SCIENCES CENTER CHINA LAKE WELLHEAD SURVEY CHINA LAKE, CA JUL / AUG 2001

2 Publication EAFB : China Lake Wellhead Survey China Lake, CA Geodetic Survey China Lake Wellhead Survey China Lake, CA July/August 2001 TABLE OF CONTENTS PAGE INTRODUCTION GENERAL INFORMATION REQUIREMENTS DATA ACQUISITION DATA REDUCTION SURVEY RESULTS SURVEY ACCURACIES COMMENTS SKETCHES AND DESCRIPTIONS DISCLAIMER: The mention herein of commercial products, trade names, or commercial companies does not constitute an endorsement of such products or companies by the United States Government. i

3 Publication EAFB : China Lake Wellhead Survey China Lake, CA China Lake Wellhead Survey July/August INTRODUCTION This report covers the geodetic survey performed by NIMA/DOGIGA in and around the Naval Air Weapons Station (NAWS) located at China Lake, CA. The purpose of this survey was to provide precise geodetic data for various monitoring wellheads, target sites, and photo points in support of the Range Department and the Environmental Project Office located at the NAWS. 2. GENERAL INFORMATION a. References: Geodetic Survey Request Worksheet received 22 March 2001 from Mike Stoner, Senior Geologist, Environmental Project Office, NAWS, requesting a precise geodetic survey of approximately 200 wellheads, target sites, and photo points throughout the Indian Wells Valley and the North Range of the NAWS. b. Person(s) Contacted: Mike Stoner Environmental Project Office Code 8G0000D Bldg NAWS China Lake, CA Phone: (760) FAX: (760) c. Duration of Mission: 15 July 17 August d. Reconnaissance: Reconnaissance was accomplished July 2001 by Larry Schneider, Ken Bennett, Helen Miller, Ray Shipp, Bill Pressley, and Dennis Warring in and around the NAWS. 1

4 Publication EAFB : China Lake Wellhead Survey China Lake, CA e. Deployment of Team: On 15 July 2001 a five member team was deployed to China Lake, CA, from Edwards AFB, CA. The team consisted of Larry Schneider, Ken Bennett, Helen Miller, Ray Shipp, and Bill Pressley. Dennis Warring deployed to China Lake, CA, from Vandenberg AFB, CA on the same day. GSA vehicles were used to transport the team and equipment. 3. REQUIREMENTS a. Form of Data: Geodetic latitudes, longitudes, ellipsoid heights, and elevations. b. Datum: WGS 84 c. Accuracy: 0.03 meter, all components, relative to local WGS-84 control. 4. DATA ACQUISITION a. General: A total of 241 various wellheads, target sites, and photo points were positioned relative to previously surveyed precise geodetic control stations SNORT A 1950 and L20, both located on the NAWS, China Lake, CA. b. GPS Relative/Static: Two independent one-hour sessions utilizing a five-second epoch interval were used to collect data on all 241 stations. Ashtech Model Z-XII GPS receivers with Z-XII Whopper Antennas (700718) were used to collect data. 5. DATA REDUCTION a. GPS: All of the GPS static data was processed using the Ashtech GPS Post-Processing System software (GPPS) using L1 carrier data for baselines under 10 kilometers in length and using L1/L2 carrier data for baselines over 10 kilometers in length. The computed vectors were then adjusted using the Geolab 3 three-dimensional least squares adjustment software. Geodetic control station SNORT A 1950 was held fixed in a constrained adjustment for the 240 stations, and the adjusted coordinates for station L20 were used as a check. All station confidence regions were less than 0.03 meter at the 95 percent confidence level. 2

5 Publication EAFB : China Lake Wellhead Survey China Lake, CA 6. SURVEY RESULTS SEE ATTACHED DATA FILE 7. SURVEY ACCURACIES a. WGS 84 Geodetic Positions: Station SNORT A 1950 is estimated to have an accuracy of 0.30 meter, Standard Error (SE), each component relative to the WGS 84 (G873) geocentric reference system. Relative accuracies are 0.03 meter, SE, each component, relative station to station. b. Explanation of WGS 84 (G873) Reference Frame: WGS 84 (G873) is a refined reference frame which includes a new GPS realization of WGS 84 and the adoption of the International Earth Rotation Service (IERS) Standards value of the product of the universal gravitational constant and the mass of the earth (GM). This refined reference frame is coincident with the IERS Terrestrial Reference Frame 1994 (ITRF94) at a level approaching 0.1 meter. c. EGM 96 Based Orthometric Heights: The orthometric heights are estimated to have an accuracy of 0.03 meter, SE, relative station to station. d. Explanation of Orthometric Height: The Mean Sea Level (MSL) orthometric heights in this publication are derived from geoid heights computed from NASA/NIMA Earth Gravity Model 96 (EGM 96) database. These geoid heights are then subtracted algebraically from the observed WGS 84 ellipsoid heights to establish the MSL orthometric heights. Both EGM 96 and WGS 84 are world models, making them extremely compatible on a global scale. Further information about EGM 96 can be found on the NIMA web site at under the PUBLICATIONS sub heading. 3

6 Publication EAFB : China Lake Wellhead Survey China Lake, CA 8. COMMENTS a. Supporting documentation is enclosed. b. If you have any questions or concerns about this project please contact Larry C. Schneider or Robert E. Wideman at (661) enclosures a/s Prepared by: Larry C. Schneider Geodesist, Geospatial Sciences Center, California Survey Office Approved by: Robert E. Wideman Team Chief, Geospatial Sciences Center, California Survey Office 4

7 Publication EAFB : China Lake Wellhead Survey China Lake, CA SOME OF THE VARIOUS WELLHEAD TYPES 5

8 _726 N W Punch mark in concrete pad, north side of well _727 N W Wooden stake and tack SW of well and windmill _BCW N W Punch mark in concrete, north side of well _GW1 N W Cut mark in north rim of well pipe _L20 N W Control Point _PPN N W Punch mark in center of N head wall, _PPS N W Punch mark in center of S head wall _W09 * N W Wooden stake and tack on north side of well _W10 N W Punch mark in concrete, north side of well _W11 N W Punch in south coner of concrete pad, S of shed _W12 N W Punch mark in concrete, north side of well _W14 N W Chisled "X" cut in north rim of metal well pipe _W15 N W Punch mark in concrete pad, north side of well _W16 N W Nail in NE corner of concrete pad, NE of well _W24 N W Wooden stake and tack, 11.81m WSW of well _W32 N W Punch mark in concrete pad, north side of well _W33 N W Punch mark in concrete pad, north side of well _W34 N W Wooden stake & tack, E of well & N side of WT _W36 N W Punch mark on NW corner of well plate cover _W38 N W Punch mark in concrete, north side of well _W43 N W Punch mark in north rim of well pipe _W45 N W Punch mark in concrete pad, north side of well _W46 N W Punch mark in concrete pad, north side of well _W47 N W Punch mark in concrete pad, north side of well _W51 N W Punch mark in concrete pad, north side of well _W52 N W Punch mark in concrete pad, north side of well _W65 N W Punch mark in concrete, north side of well _W66 N W Punch mark in concrete, SE corner of well shed _W67 N W Punch mark in concrete pad, east side of well _W73 N W Punch mark in concrete, north side of well _W78 N W Punch mark in concrete pad, north side of well _W79 N W Notch in top of PVC well pipe _W80 N W Punched hole in concrete _W81 N W Punch mark in concrete pad, north side of well * Denotes approximate latitude and longitude for these stations only

9 _W82 N W Punch mark in concrete, north side of well _W83 N W Wooden stake & tack outside entry to well shed _WCW N W Punch mark in concrete, north side of well 719 N W Punch mark in well cover 720 N W Punched hole in concrete 724 N W Punch hole in concrete pad 11M2 N W Punch mark in concrete pad, north side of well 11N1 N W Punch mark in concrete pad, north side of well 1267 N W Punch mark in concrete pad, north side of well 1271 N W Punch mark in concrete, north side of well 1272 N W Punch mark in concrete, north side of well 1281 N W Wooden stake and tack on north side of well 1283 N W Punch mark in concrete post, southeast of well 1287 N W Punch mark in concrete pad, north side of well 1289 N W Punch mark in concrete pad, north side of well 1295 N W Punch hole in concrete pad (north side of well) 1300 N W Wooden stake and tack on north side of well 1301 N W Punch mark in concrete pad, south side of well 1302 N W Punch mark in north rim of well pipe 1303 N W Punch mark concrete pad, north side of well 1309 N W Punch mark in concrete pad, north side of well 1313 N W Punch mark in concrete pad, north side of well 1316 N W Chisle cut in north rim of iron pipe 1318 N W Chisle cut in north rim of iron pipe 1320 N W Wooden stake and tack, north side of well 1321 N W Punch mark in concrete pad, north side of well 1325 N W Wooden stake and tack on north side of well 1339 N W Punch mark in concrete, north side of well 1342 N W Chisled cut in north rim of steel pipe 1344 N W Chisled cut in north rim of steel pipe 14P1 N W Punch mark in concrete pad, north side of well 15JX N W Wooden stake and tack, north side of well 17Q1 N W Punch mark in concrete pad, north side of well 19NX N W Punch mark in concrete pad, north side of well

10 1L01 N W Wooden stake and tack on NE side of well shed 2011 N W Wooden stake & tack, north side of well 2012 N W Punch mark in concrete pad, north side of well 2017 N W Punch mark in concrete pad, north side of well 2021 N W Punch hole in concrete pad 2022 N W Punch hole in concrete pad 2023 N W Punch mark in concrete pad, north side of well 2024 N W Punch mark in concrete pad, north side of well 2026 N W Wooden stake and tack on north side of well 2027 N W Punch mark on metal well cover 2030 N W Punch mark in concrete pad, west side of well 2040 N W Punch mark in concrete pad, north side of well 2041 N W Punch mark in concrete pad, north side of well 2042 N W Wooden stake and tack, north side of well 2044 N W Punch mark in concrete pad, north side of well 2045 N W Punch mark in concrete pad, north side of well 2046 N W Wooden stake and tack, north side of well 2047 N W Punch mark in concrete pad, north side of well 2049 N W Punch mark in concrete pad, east side of well 2057 N W Punch mark in concrete pad, south side of well 2060 N W Punch hole in concrete, north side of well 2061 N W Punch mark in concrete pad, north side of well 2072 N W Punch mark in concrete, north side of well 2082 N W Punch mark in concrete pad, north side of well 2086 N W Punch mark in top center of bolt on well pipe 2095 N W Punch mark in concrete pad, north side of well 2105 N W Punch mark in concrete pad, east side of well 2110 N W Chisled cut in north rim of steel pipe 2111 N W Chisle cut in north rim of steel pipe 2113 N W Punch mark in concrete pad, north side of well 2118 N W Punch mark in concrete pad, north side of well 2119 N W Punch mark in concrete pad, north side of well 2123 N W Chisle cut in north rim of steel pipe 2124 N W Chisle cut in north rim of PVC pipe

11 2125 N W Chisle cut in north rim of well pipe 2126 N W Wooden stake and tack, north side of well 2127 N W Chisle cut in north rim of steel pipe 2128 N W Chisle cut in north rim of steel pipe 2129 N W Chisle cut in north rim of iron pipe 2130 N W Chisle cut in north rim of steel pipe 2131 N W Chisle cut in north rim of steel pipe (well) 2132 N W Chisle cut in north rim of iron pipe 2133 N W Saw cut in west rim of PVC well pipe 2136 N W Chisled "X" in north rim of well pipe 2137 N W Wooden stake and tack on north side of well 2138 N W Wooden stake and tack, north side of well 2139 N W Punch mark in concrete pad, north side of well 2143 N W Punch mark in concrete pad, north side of well 2144 N W Punch mark in concrete pad, north side of well 2146 N W Punch mark in concrete pad, north side of well 2148 N W Punch mark in concrete pad, north side of well 2149 N W Punch mark in concrete pad, north side of well 2150 N W Wooden stake and tack 2151 N W Wooden stake and tack 2152 N W Wooden stake and tack 2154 N W Chisled "X" in NW corner of guard post 2155 N W Chisled "X" in NW corner of barrier 2156 N W Notch in well pipe 2157 N W Chisled "X" in north cover of well 2158 N W Chisled "X" in north cover of well 2159 N W Wooden stake and tack, south side of well 2160 N W Wooden stake and tack, south side of well 2161 N W Punch mark in concrete form, north side of well 2162 N W Chisled "X" cut in north rim of well pipe 2165 N W Chisled "X" cut in north rim of aluminum pipe 2166 N W "X" cut on north side of aluminium rim set on well 2168 N W Wooden stake and tack, north side of well 2170 N W Punch mark in concrete pad, north side of well

12 2171 N W Punch mark in concrete on north side of well 2172 N W Punch mark in concrete pad, north side of well 2175 N W N corner of two story bldg, NW of well 2176 N W Punch mark in concrete pad, north side of well 2177 N W Punch mark in concrete pad, N side of well shed 2178 N W Punch mark in concrete pad, WSW of well shed 2179 N W Punch mark in center of well pipe 2184 N W Wooden stake & tack, east side of well shake 2185 N W Wooden stake and tack, south side of well shack 2186 N W Punch mark in concrete pad, north side of well 2192 N W Punch mark in concrete pad, north side of well 2198 N W South fence line corner, SSE of the well 21J1 N W Punch mark in concrete pad, north side of well 2200 N W Punch mark in concrete pad, north side of well 2201 N W Punch mark in concrete pad, north side of well 2202 N W Wooden stake & tack on north side of well 2203 N W Notch in rim of well pipe 2204 N W Punch hole in shaft of PK nail, N side of well 23G1 N W Wooden stake and tack, north side of well 3028 N W Punch mark in concrete pad, north side of well 3031 N W Punch mark in concrete 3034 N W Punch mark in concrete 3038 N W Punch mark in concrete 3039 N W Punch mark in concrete pad, north side of well 3040 N W Punch mark on north rim of well pipe 3041 N W Punch mark in concrete pad, west side of well 3043 N W Wooden stake and tack on north side of well 3044 N W Wooden stake and tack on north side of well 3045 N W Punch mark in concrete pad, north side of well 3051 N W Chisled "X" mark on north rim of subsurface pipe 3052 N W Punch mark in concrete pad, north side of well 3055 N W Punch mark in concrete pad, north side of well 3056 N W Punch mark in concrete, SE corner of well shed 3057 N W Punch mark in concrete, north side of well

13 3066 N W Punch mark in concrete pad, north side of well 3067 N W Punch mark in concrete pad, N side of well shed 3072 N W Wooden stake and tack, NNE of well shack 3073 N W Wooden stake and tack, 3.6m south of well 3074 N W Punch mark in concrete pad, south side of well 3085 N W Wooden stake and tack, north side of well 3843 N W Chisled "X" mark on north rim of well 3844 N W Wooden stake at NW corner of concrete border 726A N W Chisled "X" in north rim of iron well pipe 727P * N W Chisle mark on north side of rim BW01 N W Punch hole in concrete BW02 N W Punch mark in concrete pad, north side of well BW03 N W Punch hole in concrete, north side of well BW04 N W Chisled "X" cut in north rim of iron pipe BW05 N W Chisle mark on north side of rim BW06 N W "X" cut in north rim of PVC pipe BW07 N W Chisle cut in north rim of iron pipe BW08 N W Chisled "X" in north rim of PVC pipe BW09 N W Chisled "X" in north rim of PVC pipe BW10 N W Chisle cut in north rim of iron well pipe BW11 N W Chisled "X" cut in north rim of iron pipe BW12 N W Chisled "X" cut in north rim of iron pipe BW13 N W Punch mark in concrete pad, north side of well BW14 N W Punch mark in concrete pad, north side of well BW15 N W Chisled mark on north rim of PVC well pipe BW16 N W Nail in concrete pad, north side of well BW17 N W Punch mark in concrete pad, north side of well BW18 N W Punch mark in concrete pad, north side of well BW19 N W Nail in concrete form, north side of well BW20 N W Notch in lock hasp, north side of well BW21 N W Chisled "X" in north rim of well BW22 N W Knotch in north rim of well pipe BW23 N W Punch hole in concrete form (north side of well) BW24 N W Chisle cut in north rim of iron pipe * Denotes approximate latitude and longitude for these stations only

14 BW25 N W Drill hole in concrete (north side of well) BW26 N W Chisle cut in north rim of well pipe BW27 N W Chisle cut in north rim of well pipe BW28 N W Chisled "X" cut on iron latch BW29 N W Chisled "X" cut on iron latch, E side of well pipe BW30 N W Chisled "X" cut in top of iron latch, E side of well BW31 N W Chisled "X" cut on iron latch, SE side of well BW32 N W Chisle mark on north side of rim CW02 N W Punch mark in concrete pad, north side of well CW03 N W Chisled "X" in NW concrete fence post form CW04 N W Punch mark in center of steel well cap CW05 N W Punch mark in SW concrete corner fence post CW06 N W Wooden stake and tack on north side of well CW07 N W Punch mark in north rim of steel well pipe CW08 N W Punch mark in north side of metal well cover CW09 N W Punch mark NW corner fence post concrete form CW10 N W Punch mark in north rim of iron well pipe CW11 N W Punch mark in concrete pad, north side of well CW12 N W Punch mark in concrete pad, north side of well CW13 N W Punch mark on north edge of well cover GS19 N W Control point GW01 N W Punch mark in concrete, south side of pipe GW02 N W Wooden stake and tack on north side of well GW03 N W Chisled "X" in NW concrete fence post form GW04 N W Chisled "X" on top of well steel plate GW05 N W Chisled "X" on north side of well pipe cover GW06 N W Chisled "X" on the north rim of PVC well pipe GW07 N W Chisled mark on north rim of iron well pipe GW08 N W Chisled "X" on well cover GW09 N W Chisled "X" on north side of well pipe cover GW10 N W Chisled "X" on north rim of well pipe GW11 N W hisled "X" on north side of well cover GW14 N W Chisled "X" on north side of well pipe GW16 N W Chisled "X" on north side of well pipe

15 GW17 N W Chisled mark on north rim of iron well pipe W13A N W Wooden stake and tack, south side of well shack W24P * N W Top of pipe WW01 N W Punch mark in a wooden 2 x 4 post west of weir WW02 * N W Punch mark in concrete curb NE of weir * Denotes approximate latitude and longitude for these stations only