TALLEST - Man-made Monument in United States- Gateway Arch - St. Louis, Missouri
Posted by: Groundspeak Charter Member BruceS
N 38° 37.440 W 090° 11.101
15S E 745061 N 4278812
Quick Description: At 630-foot tall the Gateway Arch is the tallest monument in the United States.
Location: Missouri, United States
Date Posted: 1/13/2008 2:47:23 PM
Waymark Code: WM2Z27
Published By: Groundspeak Premium Member silverquill
Views: 234

Long Description:

The Gateway Arch in downtown St. Louis measures 75 feet taller than the Washington Monument and more than twice as tall as the Statue of Liberty.

The process which led to the construction of the Arch began in 1933 when the St. Louis Mayor Dickman assembled a group of businessmen who formed the Jefferson National Expansion Memorial Association. A Joint Resolution from Congress followed in 1934. In 1935,the City passed a $7.5 million bond issue and, along with $9 million in WPA funds, began acquisition and clearance of a 40-block area. After this nothing significant happened until 1948 when architectural competition was won by Eero Saarinen.  Saarinen's design was for a 630 foot tall stainless steel clad catenary curve shaped arch.  Construction of the Arch began in 1963, and was completed on October 28, 1965, for a total cost of less than $15 million. The Arch has foundations sunk 60 feet into the ground, and is built to withstand earthquakes and high winds; it sways up to 1 inch in a 20 mph wind, and is built to sway up to 18 inches.
 

General Facts

Outer Width - Outside North Leg to Outer South Leg 630' (192m)
Maximum Height 630' (192m)
Shape of Arch Section Equilateral Triangle
Dimension of Arch at Base 54 ft. (16.46m)
Dimension of Arch at Top 17 ft. (5.18m)
Size of Windows Approx. 7" x 27" (180 mm x 690 mm)
Construction of Windows 3/4 in. (19mm) Plate Glass; Hinged and Locked
Size of Observation Room 7' 2" x 65' x 6' 9" high (2.18m x 19.8m x 2.06m)
Capacity of Observation Platform 100 - 140 persons
Deflection of Arch 18" in 150 MPH wind (0.46 m in 240 km/h wind)
Method of Determining Deflection of Arch Calculations and Wind Tunnel Tests (240 km/h)
Number of Sections in Arch 142
Thickness of Plates for Outer Skin 1/4" (6.3mm)
Type of Material Used in Arch Exterior Stainless Steel; #3 Finish Type 304
Structural Capacity of Observation Area 100 lb/sq. ft (488 kg/m)

 

Type of documentation of superlative status: National Parks Service website

Location of coordinates: Under center of Arch.

Web Site: [Web Link]

Visit Instructions:


Post one photo of the waymark that is a different view from the one on the page and describe your visit, including the date. Other information that you may regarding the waymark is encouraged. Neither you nor your GPSr need to appear in any photos!
Search for...
Geocaching.com Google Map
Google Maps
MapQuest
Bing Maps
Trails.com Maps
Nearest Waymarks
Nearest Superlatives
Nearest Geocaches
Nearest Benchmarks
Nearest Hotels
Create a scavenger hunt using this waymark as the center point