COLORADO. TRIANGTTLATION STATIONS. Cieede and Del Norte quadrangles. MINERAL, BIO GRANDE, AND SAGUACHE COUNTIES. " During the season of 1914 J. R. Ellis extended triangulation northeast from stations Belleview and South River, described in Bulletin 440. Four stations were occupied and seven points were located by intersections, all on North American datum. BARN, BIO GRANDE COUNTY, COLO. (Not occupied.) South end of barn about 6 miles northwest of Del Norte. [Latitude 37° 41' 54.48". Longitude 106° 26' 05.20".] To station Azimuth. Back azimuth. Distance. 0 / II 0 / II Log. meters. Miles. Del Norte...................................... 223 06 33 4.21825 10.271 East.Butte. .................................... 238 56 18 585929 3.95097 5.550 Dog............................................ 322 48 10 142 51 26 4.11416 8.082 » BELLEVIEW, RIO GRANDE COUNTY, COLO. Situated on east end of Belleview Mountain, locally known as North Mountain, about 1 mile north of the nearly abandoned town of Summitville. Station mark: A rock monument 7 feet base and 9 feet high, probably erected by the Wheeler Survey. Reference mark: The point occupied by theodolite ia a hole drilled in a large rock (cracked) in which is cemented a nail with the head projecting 0.25 inch and over which a rock monument 2 feet base and 3 feet high was erected. True bearing from station 227° 43', distant 9.9 feet. [Latitude 37° 27'02.48". Longitude 106° 36'14.98".] To station- Azimuth. Back azimuth. Distance. Log. meters. Miles. 362320.74 216 1959.08 4.1390418 89 06 35. 64 268 49 43. 89 4.6118040 South River....... ............................. 1122806.51 2921420.07 4.5567810 Del Norte...................................... 193 15 16. 41 13 16 46.77 4.2007172 9.864 256 24 49. 58 7631 02.92 4. 1906878 9.639 BENNETT, RIO GRANDE COUNTY, COLO. Situated in the highest part of Bennett Peak and at the headwaters of San Fran­ cisco Creek. Signal: A cairn 4.5 feet base by 6.5 feet in height. Station mark: A bronze tablet set in rock under center of cairn. 85 86 TBIANGULATIOF AND PRIMARY TRAVERSE, 1913-1915. BLatitude 37° 29' 00.24". Longitude 106° 26' 01.25".] To station- Azimuth. Back azimuth. Distance. Log. meters. Miles. 763102.92 25624 49.58 4.1906878 9.639 101 55 42.71 281 35 42.09 4.6940039 30.715 Del Norte. .................................... 136 00 50. 46 3155606.92 4.2159060 10.215 East Butte ..................................... 194 51 25.54 14 54 33.85 4.4692850 18.308 197 2828.00 4. 34010 13.597 209 19 48.00 4.44964 17. 498 Dog............................................ 209 5336.70 29 56 49. 63 4. 1926261 9.682 224 0553.00 4.62204 26.025 Red Silo... ..................................... 2263021.00 4.45018 17.520 211 07 06.00 4.59736 24.587 CENTER, SAGUACHE COUNTY, COLO. (Not occupied.) West end of yellow elevator at Center. [Latitude 37° 45' 14.10". Longitude 106° 06' 10.73".) . To station Azimuth. Back azimuth. Distance. 0 1 It 0 / II Log. meters. Miles. 224 05 54 4.62201 26.023 Dog............................................ 5225 43 232 16 49 4.43209 16. 805 85 58 18 265 49 18 4.33541 13.451 CHIMNEY, RIO GRANDE COUNTY, COLO. (Not occupied.) Chimney on new house 5 or 6 miles northeast of Del Norte and 0.25 mile north of main irrigation ditch. ( [Latitude 37° 42' 16.14". Longitude 106° 16' 38.14".) To station- Azimuth. Back azimuth. Distance. 0 t II Log. meters. Miles. Dog............................................ 284347 208 41 16 4.09962 7.816 Bennett................................. ...... 209 19 48 4. 44964 17.498 East Butte......... ........................... 122 17 57 302 15 21 3.86766 4.542 DEL NORTE, RIO GRANDE COUNTY, COLO. Situated on the highest point of Del Norte Peak and about 14 miles southwest of Del Norte town. A wagon road leads from Del Norte to Hogback Mesa, from which the station may be reached by horseback. Signal: A cairn 5 feet base by 6 feet in heigh. Station mark: A bronze tablet set in solid rock under center of cairn. [Latitude 37° 35' 23.67". Longitude 106° 33' 46.62".] To station- Azimuth. Back azimuth. Distance. 0 1 II 0 / II Log. meters. mies. 13 1646.77 193 15 16.41 4.2007172 9.864 87 25 24.82 267 10 06.59 4.5679884 22.979 223 06 33 4.21825 10.271 East Butte .................................... 228 39 04.67 48 46 57.57 4. 4021214 15.685 243 08 46 4. 45086 17.557 243 13 48 6321 16 4.30393 12.511 Center ...................................:..... 245 41 54 4. 64816 27.638 Dog............................................ 264 54 57. 23 85 02 54.33 4.2845837 11.960 COLOBADO. 87 DEL NORTE OBSERVATORY, RIO GRANDE COUNTY, GOLO. (Not occupied.) Center of dome of observatory on low hill on south edge of Del Norte. [Latitude 37° 40' 17.18". Longitude 106° 21' 33.11".) To station Azimuth. Back azimuth. Distance. \ 0 1 II 0 / II Log. meters. Miles. Bennett ....................................... 17 31 12 197 28 28 4.34010 13.597 Del Norte...................................... 63 21 16 243 13 48 4.30393 12.511 EastButte.................................... 7 25 27 3.88479 4.766 DOG MOUNTAIN, RIO GRANDE COUNTY, COLO. Situated on the highest point of Dog Mountain, a sharp peak about 6 miles due south of Del Norte. Signal: A cairn 5 feet base by 6 feet in height. Station mark: A bronze tablet set in solid rock under center of cairn. [Latitude 37° 36' 18.31". Longitude 106° 20' 44.64".) To station Azimuth. Back azimuth. Distance. Log. meters. Mlea. 295649.63 2095336.70 4. 1926261 9.682 Del Norte. .................................... 85 0254.33 264 54 57.23 4.2845837 11.966 142 51 26 322 48 10 4.11416 8.082 EastButte..................................... 179 14 42.70 359 14 37.77 4.1752526 9.303 208 41 16 28 43 47 4.09962 7.816 White Silo..................................... 211 58 03 32 03 21 4.37998 14.905 232 16 49 52 25 43 4.43209 16.805 245 07 32 65 12 48 . 4.14586 8.694 Monte Vista................................... 279 06 49 99 15 17 4.31578 12.857 EAST BUTTE, RIO GRANDE COUNTY, COLO. Situated on the highest part of*the eastmost of two buttes about 3.5 miles north of Del Norte. A wagon road runs north and south between the two buttes. Signal: A rock cairn 4. 5 feet base by 6 feet in height. Station mark: A bronze tablet set in solid rock under center of cairn. [Latitude 37° 44' 23.86". Longitude 106° 20' 52.69".) To station- Azimuth. Back azimuth. Distance. 0 1 II 0 1 II Log. meters. Miles. 7 25 27 3.88479 4.766 14 54' 33. 85 194 51 25.54 4.4692850 18.308 484657.57 2283904.67 4.4021214 15.685 58 59 29 238 56 18 3.95097 5.550 White Silo ..................................... 247 21 20 67 26 43 4.14532 8.683 265 49 18 85 58 18 4.33541 13. 451 302 15 21 122 17 57 3.86766 4.542 Red Silo... .................................... 305 10 24 125 15 45 4. 19784 9.779 311 29 42 131 38 16 4. 43996 17.112 Dog............................................ 359 14 37. 77 179 14 42.70 4. 1752526 9.303 MONTE VISTA, RIO GRANDE COUNTY, COLO. (Not occupied.) Station mark: Center of chimney on sugar beet factory, 1 mile east of Monte Vista. [Latitude 37° 34' 31.20". Longitude 106° 06' 52.08".] To station- Azimuth. Back azimuth. Distance. Log. meters. Miles. 272 12 13 4. 59825 24.638 Dog............................................ 99 15 17 279 06 49 4.31578 12.857 131 38 16 311 29 42 4.43996 17. 112 88 TRIANGULATION AND PRIMARY TRAVERSE, 1913-1915. RED SILO, RIO GRANDE COUNTY, COLO. (Not occupied.) About 7 miles northwest of Monte Vista. [Latitude 37° 39' 28.88". Longitude 106° 12' 06.77".] To station Azimuth. Back azimuth. Distance. Log. meters. Miles. 226 30 21 4.45018 17.520 Dog............................................ 651248 245 07 32 4. 14586 8.694 DelNorte. ..................................... 256 32 53 4.51534 20.356 125 15 45 305 10 24 4. 19784 9.799 SOUTH RIVER, MINERAL COUNTY, COLO. On the summit of South River Peak, situated at the head of Red Mountain Creek which enters the Rio Grande from the south at the bend in river about 12 miles south­ west of creek, and is at the east side of the east branch of the creek. A road reaches the basin about 1 mile distant from the peak via Red Mountain Creek. From the terminus of this road a trail leads across the divide and to Pagosa Spring. Station mark: A bronze tablet cemented in rock, over which a cairn 3J feet in diameter and 6 feet high was erected. [Latitude 37° 34' 27.08". Longitude 106° 58' 52.17".] To station Azimuth. Back azimuth. Distance. Log. meters. Miles. 273434.55 207 31 27. 76 4.2119146 76 22 58. 54 2560833.20 4.5550681 10802 41.92 287 4738.97 4.5811070 142 41 50.92 32224 10.27 4.8424016 Bristol......................................... 165 05 40. 79 3450258.99 4. 4009798 San Luis. ...................................... 185 30 42. 14» 5 3233.17 4. 6629397 197 54 21.81 17 5930.83 4.6031924 214 58 56. 69 35 26 54. 26 5.0618017 267 1006.59 87 25 24.82 4.5679884 22.979 281 35 42. 09 101 55 42. 71 4. 6940039 30. 715 292 14 20.07 112 28 06. 51 4. 5567810 Summit............ ... ............. 314 27 34.07 134 37 57. 63 4.5484071 WHITE SILO, SAGUACHE COUNTY, COLO.