"Station X is the U. S. Coast and Geodetic Survey Station, Needles. (Longitude Pier.) "Station A is the east end of the base. "Station C is the west end of the base. "Station B is in the meridian through A. "Station M is von Schmidt's post on supposed 35th parallel. "Station N is von Schmidt's post on supposed 35th parallel. "Station Q is iron boundary monument (present position). "Station L is von Schmidt's intersection of supposed 35th parallel with Colorado River. "Station L' is the intersection of the 35th degree of latitude and the middle of Colorado River, as the river was found by von Schmidt in 1873. "Station P is the flagstaff on Camp Mojave. "Station O is a point near the flagstaff. "By a solution of the foregoing triangles the following results were obtained: Measured AC=1051.56 metres, and XA=315.8 metres. Log. AC-3.0218341. Log. AB 2.9202788. Log. JN-3.9720686. Log. IN=4.0070702. Log. NP-3.725521. Log. OP-3.085068, or OP=1,216.4 metres. "The line OP was measured as a check on this work, and was found to be 1,215.8 metres long. "The reductions to latitude and longitude were made according to the U. S. Coast and Geodetic Survey methods, and the detail of the reduction work is omitted. "Station N was found to be in latitude 35° 00′ 23′′.39, and in longitude 114° 39′ 23′′.61, and the terminal point L of the von Schmidt boundary survey of 1873 is in latitude 35° 00′ 23′′.39, and in longitude 114° 39′ 07′′.08. "Incidentally the latitude and longitude of the flagstaff at Camp Mojave was also established by this work, as follows: Latitude 35° 02′ 39.22, and longitude 114° 37' 14".48. "As nearly as could be determined from the von Schmidt surveys of 1873, Colorado River from L to L' had a southeasterly course, and this course, as nearly as it could be determined, was made the basis of the computation of the longitude of the intersection of the 35th degree of latitude with the center line of Colorado River in its position of 1873. The latitude 35° 00′ 23′′.39, and longitude 114° 39′ 07′′.08 of the point L, with an azimuth 322° 32′ 25′′.65 from L to L', the latitude of L' being 35° 00' 00", established the longitude of L' at 114° 38′ 45′′.30, and the distance from L to L' was found to be 907.97 metres. "The boundary line from Lake Bigler southeastward to Colorado River must, therefore, connect a point in latitude 39° 00' 00", longitude 120° 00' 00", with a point at Colorado River in latitude 35° 00′ 00′′ and longitude 114° 38′ 45′′.30. "From Colonel von Schmidt it was learned before the above field work was undertaken that he was directed by the department in authority to make the center line of the Colorado River, as he found it in 1873, the objective point of his survey, and not the river as it might have been. at the date of the admission of California. It was for this reason that L' was established as above noted. The correct azimuth of the boundary line northwestward from the point L' is 134° 33′ 09" 29, and this line, which the above work indicates as the correct position of the State boundary, passes about four hundred and fourteen feet to the southwest of the von Schmidt terminal point L. "The iron monument O now stands in latitude 35° 00′ 52′′.91 and longitude 114° 39′ 36′′.14, and is one thousand two hundred and sixtyfour feet due east of the correct position of the State line. "The field work at Colorado River was done under somewhat unfavorable conditions. The heat was intense, except for two days, when there was a heavy north wind, filling the air with dust and sand. Transportation facilities were particularly unsatisfactory. Acknowledgments in connection with this work are due to Captain Bowman, commanding at Camp Mojave, who placed the Government boat at our disposal and kindly rendered us all the assistance in his power. We are also under obligations to Mr. W. S. Hancock, Master Mechanic of Atlantic and Pacific Railroad at The Needles, and to Messrs. Monahan and Murphy, of the same place, for assistance and courtesies extended." As soon as the results of the work at Colorado River became available, a calculation of the azimuth and length of the line from the point in Lake Bigler to Colorado River was made, at our request, and for our use, by Chas. A. Schott, of the U. S. Coast and Geodetic Survey, and reported by him as follows, under date of January 6, 1890: Azimuth from Lake Bigler end of line to the Colorado River end, 311° 19′ 36′′.99. Distance, 651,056 metres=404.551 miles. Azimuth from the Colorado River end of the line to the Lake Bigler end, 134° 33′ 09′′.29. The limited appropriation available for the purpose of making the State line survey, precluded the possibility of marking more than a few miles of the line southeastward from the lake with stakes in mounds of stones. This work could not be extended farther than across the western portion of Carson Valley, as shown by the notes above recorded and the map accompanying this report. Three copies each of two maps are filed herewith, and made a part of this report, as follows: Sheet No. 1.-"State boundary survey. Map of the boundary line of California near Lake Bigler, showing position of the U. S. Coast and Geodetic Survey primary stations, Lola and Round Top, and the triangulation work of June and October, 1889, also the boundary line as surveyed and marked in the field by A. W. von Schmidt in 1872 and 1873, and the position of the boundary line southeastward from the lake, as surveyed by C. E. Grunsky and William Minto in 1889 and 1890, under instructions from Theo. Reichert, State Surveyor-General." Sheet No. 2.-"State boundary survey. Map of the boundary line of California at the intersection of the 35th degree of north latitude with Colorado River, showing position of the U. S. Coast and Geodetic Survey station, Needles, and the triangulation work of William Minto in September, 1889, done under instructions from Theo. Reichert, State Surveyor-General." We append to this report: 1. Letter of appointment and instructions. 2. Latitude and longitude determination at Verdi, by Chas. A. Schott. 3. Azimuth and length of State boundary line, Lake Tahoe to Colorado River. Letter of Chas. A. Schott. 4. The iron monument at Colorado River. Letter of W. H. Sailsbury. 5. A. W. von Schmidt survey, 1872 and 1873. Extracts from field notes. We have to thank Superintendent T. C. Mendenhall, of the U. S. Coast and Geodetic Survey, for the kind assistance rendered us, and especially are our thanks due to Prof. George Davidson, in charge of the Pacific Coast division of this department, for advice and prompt response to our requests for reliable data. We have also to acknowledge courtesies extended by Gov. C. C. Stevenson, of Nevada, and the interest taken in our work by Hon. Cyrus Coleman, of Markleeville, Alpine County, and to thank him for assistance rendered while the station Round Top was first occupied in June, 1889. Our field work was completed, as far as possible, in November, 1889, but it was necessary to set temporary monuments on a random line, because the correct line could not be marked in the field until the computation memoranda were received from Washington late in January of this year, at which time the great depth of snow on the Sierra Nevada precluded the possibility of reaching the line at those points where permanent monuments have since been set. Our work could not, therefore, be completed until after the melting of the snow in June, 1890, and it was not therefore possible to transmit the result of our work at an earlier date. We have also to state that no outfit was purchased for use on the survey. Tents were kindly furnished us by Adjutant-General R. H. Orton, and all necessary instruments were furnished by us and our assistants. There is no property in our hands to be sold for the benefit of the State, as provided in the law authorizing this survey. Respectfully submitted. C. E. GRUNSKY, In charge of Survey. SAN FRANCISCO, July 22, 1890. LETTER OF APPOINTMENT AND INSTRUCTIONS. OFFICE SURVEYOR-GENERAL, SACRAMENTO, May 7, 1889. C. E. GRUNSKY and WILLIAM MINTO, Civil Engineers: GENTLEMEN: Whereas, the Legislature of this State passed an Act to provide for the correction and establishment of a portion of the eastern boundary line of this State (see Statutes 1889, page 38, also copy of said Act inclosed herewith), and in order to carry out the intent of said Act, you are hereby appointed to make such surveys as you may deem necessary, and act under the following instructions: In making the survey of the State boundary line southeastward from Lake Tahoe you will, so far as practicable, make the latitude and longitude as established by the U. S. Coast and Geodetic Survey the basis of your work. Connect your triangulation system, which will be necessary to fix the point at which the State boundary line intersects the southeastern shore of Lake Tahoe, with the U. S. Coast and Geodetic Survey station at Round Top, and with other U. S. Coast and Geodetic Survey stations if convenient, and determine the error, if any there be, in the position of the State boundary line at Lake Tahoe. Should you find that the boundary line, as marked in the field by A. W. von Schmidt in 1873, varies to any considerable extent from the intended position of the State boundary, you will then proceed to the point where the boundary line intersects Colorado River, and by proper connection with the nearest available point at which latitude and longitude have already been determined, you will establish its geographical position and make the same the basis of the necessary calculation of the azimuth of the State boundary line southeastward from Lake Tahoe. When this is done, you will proceed with the survey of the boundary line in conformity of law above cited. You will consult with Prof. Geo. Davidson for advice concerning methods to pursue in using and connecting with the work of the U. S. Coast and Geodetic Survey. You will keep an accurate account of all expenses which are chargeable against the appropriation named in the Act, and, when practical, take receipts for all sums of money expended by you on this work. Your compensation will be $20 per day each, and necessary expenses while engaged in field operations. When the work is completed, you will make a full report to this office. I am, gentlemen, respectfully, your obedient servant, THEO. REICHERT, LATITUDE AND LONGITUDE DETERMINATION OF VERDI. EXTRACT FROM A REPORT OF CHAS. A. SCHOTT, ASSISTANT IN CHARGE OF COMPUTING DIVISION U. S. COAST AND GEODETIC SURVEY. Comparison of results for longitude in 1872, by George Davidson and S. R. Throckmorton, with the results of longitude in 1889, by C. H. Sinclair and R. A. Mar. According to letter of C. H. Sinclair, the old triangular station Verdi Bluff is 246.51 metres south of transit, and 106.63 metres east of transit, hence: From the Sinclair and Mar determination of 1889: Longitude of Verdi... 0h 6m 02.874 8 05 58.29 7h 59 55.416 or, 119° 58′ 51′′.240 Showing an almost perfect accord. AZIMUTH AND LENGTH OF STATE BOUNDARY LINE, LAKE TAHOE TO COLORADO RIVER. COMPUTING DIVISION, COAST AND GEODETIC SURVEY,) January 6, 1890. S Mr. B. A. COLONNA, Assistant in charge Office and Topography: |