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- Gila_and_Salt_River_meridian abstract "The Gila and Salt River Meridian intersects the initial point on the south side of Gila River, opposite the mouth of Salt River, at latitude 33° 22′ 37.82733″ north, longitude 112° 18′ 21.99931″ west from Greenwich based on NAD 83, and governs the surveys in the territory of Arizona. The current declination for the initial point is 12° east. initial point The initial point is located on Monument Hill, an easily visible hill just south of the confluence of the Gila and Salt Rivers, in Avondale, Arizona, about 14 miles (23 kilometers) southwest of downtown Phoenix. The original marker was set in 1851 by John R. Bartlett. In 1934, the U.S. Coast and Geodetic Survey set triangulation station "INITIAL" approximately 15 feet from the initial point. Ty White, Associate Cadastral Engineer for the U.S. Bureau of Land Management (BLM) re-monumented the initial point on December 1, 1944. On April 24,1962, the monument was re-established by Leonard W. Murphy, based on the Ty White's field notes, because the previous monument had been vandalized. On April 26, 1984, Paul L. Reeves and John P. Bennet re-monumented the original corner. On February 19, 2006, the initial point was again re-monumented due to deterioration of 1985 plaque. This re-monumentation was performed by staff from the BLM, members of the Arizona Professional Surveyors Society (including this editor), and students at Phoenix College. The initial point was added to the National Register of Historic Places (listing #02001137) as of October 15, 2002. The plaque for that listing was installed as part of the 2006 re-monumenting of the initial point.For the 1984/2006 marker, handheld GPS units give a reading of 33° 22.631′ N Latitude and 112° 18.366′ W Longitude due to the specific geoid used. The angle between the 1984/2006 marker and the 1931 marker is at an azimuth bearing of 292°, aka 68° west of due north. The location is immediately east of Phoenix International Raceway and the western side of Monument Hill is terraced for low-priced race viewing.".
- Gila_and_Salt_River_meridian thumbnail Phoenix_International_Raceway,_November_2011.jpg?width=300.
- Gila_and_Salt_River_meridian wikiPageExternalLink books?id=68I3AAAAMAAJ&dq.
- Gila_and_Salt_River_meridian wikiPageExternalLink body.1_div.16.html.
- Gila_and_Salt_River_meridian wikiPageExternalLink displaycommon.cfm?an=1&subarticlenbr=12.
- Gila_and_Salt_River_meridian wikiPageExternalLink arizona.htm.
- Gila_and_Salt_River_meridian wikiPageExternalLink gila-and-salt-river-meridian.
- Gila_and_Salt_River_meridian wikiPageExternalLink gila_and_salt_river.htm.
- Gila_and_Salt_River_meridian wikiPageExternalLink WM5Q37_Initial_Point_of_the_Gila_and_Salt_River_Base_Line_and_Meridian_Avondale_AZ.
- Gila_and_Salt_River_meridian wikiPageID "16130133".
- Gila_and_Salt_River_meridian wikiPageRevisionID "567708552".
- Gila_and_Salt_River_meridian hasPhotoCollection Gila_and_Salt_River_meridian.
- Gila_and_Salt_River_meridian subject Category:Geography_of_Arizona.
- Gila_and_Salt_River_meridian subject Category:Meridians_and_base_lines_of_the_United_States.
- Gila_and_Salt_River_meridian subject Category:Named_meridians.
- Gila_and_Salt_River_meridian point "33.37716944444445 -112.30617222222222".
- Gila_and_Salt_River_meridian type SpatialThing.
- Gila_and_Salt_River_meridian comment "The Gila and Salt River Meridian intersects the initial point on the south side of Gila River, opposite the mouth of Salt River, at latitude 33° 22′ 37.82733″ north, longitude 112° 18′ 21.99931″ west from Greenwich based on NAD 83, and governs the surveys in the territory of Arizona. The current declination for the initial point is 12° east.".
- Gila_and_Salt_River_meridian label "Gila and Salt River meridian".
- Gila_and_Salt_River_meridian sameAs m.03w9z90.
- Gila_and_Salt_River_meridian sameAs Q5560679.
- Gila_and_Salt_River_meridian sameAs Q5560679.
- Gila_and_Salt_River_meridian lat "33.37716944444445".
- Gila_and_Salt_River_meridian long "-112.30617222222222".
- Gila_and_Salt_River_meridian wasDerivedFrom Gila_and_Salt_River_meridian?oldid=567708552.
- Gila_and_Salt_River_meridian depiction Phoenix_International_Raceway,_November_2011.jpg.
- Gila_and_Salt_River_meridian isPrimaryTopicOf Gila_and_Salt_River_meridian.
