Training Wall

Training Wall (HM1DBY)

Location: Oakland, CA 94607 Alameda County
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Country: United States of America
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N 37° 48.08', W 122° 19.478'

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Inscription
This stone wall you see before you is a partial replica of the north training wall, one of two historic jetties called "training walls" because they were designed to direct the forces of the ebb tide to scour Oakland's shipping channel and keep it open. Before training walls were built, vessels often had to wait until high tide before they could sail through the shallow waters off of Oakland. The training walls were designed by the U.S. Army Corp of Engineers in 1874. Twenty years in the making, the walls helped make it possible for ocean-going ships to sail up the estuary - an important part of the development of Oakland as a Port.

facts:
Building the training walls took:
· More than 310, 000 tons of stone
· Over 500,000 square feet of dry stone facing
· Approximately $615,000

Length: 9,500 Feet - north wall; 12,000 Feet - south wall
Width: 8 feet (top) - 20 feet (base)
Height: 6 feet above low water

Stone for the training walls came from shoreline quarries at Yerba Buena Island, Angle Island, San Francisco, San Bruno, and San Rafael.

Annual cargo entering of leaving Oakland harbor: 1874 - 154,000 tons; 1900 - 3,250,000 tons (2000% increase!)

Sidebar
In 2001, when the Port of Oakland deepened and widened the estuary to accommodate larger containerships, the north training wall was demolished. Stones were set aside from the original wall and used to rebuild a 150-foot-long portion of the wall at this site. The south training wall can still be seen along the Alameda shore of the estuary.
Details
HM NumberHM1DBY
Tags
Marker ConditionNo reports yet
Date Added Friday, October 3rd, 2014 at 7:44pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)10S E 559455 N 4183987
Decimal Degrees37.80133333, -122.32463333
Degrees and Decimal MinutesN 37° 48.08', W 122° 19.478'
Degrees, Minutes and Seconds37° 48' 4.80" N, 122° 19' 28.68" W
Driving DirectionsGoogle Maps
Area Code(s)510, 559, 415, 925, 650
Closest Postal AddressAt or near 70 Unnamed Road, Oakland CA 94607, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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