Initial Point of the Gila and Salt River Base Line and Meridian - Avondale, AZ
Posted by: Groundspeak Premium Member desert georangers
N 33° 22.630 W 112° 18.366
12S E 378507 N 3693862
Benchmark for the Initial Point of Arizona
Waymark Code: WM5Q37
Location: Arizona, United States
Date Posted: 02/01/2009
Published By:Groundspeak Premium Member silverquill
Views: 59
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Located at the top of Monument Hill, this benchmark is the point of reference that most of Arizona was surveyed from. From this point, east and west is the Gila and Salt River Baseline; and north and south is the Gila and Salt River Meridian. This is the baseline and principal meridian for the state. The monument is located on Phoenix International Raceway property. It can be accessed with only with permission by PIR, but can also be visited during race events when hill seating is available. A plaque identifies this as part of the National Register of Historic Places (listing #02001137). The benchmark is labled T1N R1W R1E T1S 2006, and is set in concrete with colored tile showing the baseline and meridian.
Street address:
South Avondale Boulevard
Avondale, AZ USA
85323

County / Borough / Parish: Maricopa

Year listed: 2002

Historic (Areas of) Significance: Point of reference for land survey of Arizona

Periods of significance: 1850 - 1874

Historic function: Survey marker

Current function: Hill seating for race events

Privately owned?: yes

Season start / Season finish: From: 08/11/2013 To: 08/11/2013

Hours of operation: From: 12:00 AM To: 12:00 AM

Primary Web Site: [Web Link]

Secondary Website 1: [Web Link]

Secondary Website 2: [Web Link]

National Historic Landmark Link: Not listed
Visit Instructions:
Please give the date and brief account of your visit. Include any additional observations or information that you may have, particularly about the current condition of the site. Additional photos are highly encouraged, but not mandatory.
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Recent Visits/Logs:
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Highpointer visited Initial Point of the Gila and Salt River Base Line and Meridian - Avondale, AZ 02/20/2023 Highpointer visited it
AnthemRose visited Initial Point of the Gila and Salt River Base Line and Meridian - Avondale, AZ 08/05/2017 AnthemRose visited it
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ILuvAZ visited Initial Point of the Gila and Salt River Base Line and Meridian - Avondale, AZ 05/25/2014 ILuvAZ visited it
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philbeer visited Initial Point of the Gila and Salt River Base Line and Meridian - Avondale, AZ 08/11/2013 philbeer visited it
Poehunters visited Initial Point of the Gila and Salt River Base Line and Meridian - Avondale, AZ 08/11/2013 Poehunters visited it
blackhorse221 visited Initial Point of the Gila and Salt River Base Line and Meridian - Avondale, AZ 02/27/2013 blackhorse221 visited it
AZTech visited Initial Point of the Gila and Salt River Base Line and Meridian - Avondale, AZ 05/28/2012 AZTech visited it
dronnord visited Initial Point of the Gila and Salt River Base Line and Meridian - Avondale, AZ 12/21/2010 dronnord visited it
desert georangers visited Initial Point of the Gila and Salt River Base Line and Meridian - Avondale, AZ 04/11/2008 desert georangers visited it
macdod visited Initial Point of the Gila and Salt River Base Line and Meridian - Avondale, AZ 04/27/2007 macdod visited it

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