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During the time the North Bloomfield Gravel Mining Company operated, as many as eight monitors were in use at the same time. Fashioned after Civil War cannons, the large monitors could weigh as much as 1 1/2 tons. The large monitors in the Diggins were capable of using 25 million gallons of water in a 24 hour period or over one million gallons an hour. The wooden box toward the rear of the monitor was loaded with rock to raise the barrel of the monitor and act as a counter balance created by the bucking water pressure leaving the nozzle.
The blasting power of a monitor or water cannon came from elevation drop alone. No mechanical devices were used. The water that came from a nearby resovoir exited in large pipes then graduated down in size until they reached the monitor and through a 10 inch nozzle. A large monitor would blast water at approximately 5,000 pounds per square inch, enough pressure to move a boulder the size of a small car. Different sizes of monitors had various functions. Large monitors were used to bring down the mountain, while small monitors were used to keep the debris moving down the sluice or long toms used to collect the gold and then on to the final exit point.
The miner that operated the monitor was known at the “piper.” He was paid the most for he had to know how to operate that big monster properly. If he didn’t, cave-ins occurred catching men unprepared thus causing injury and even death.
Legend has it that a miner with a dirty shovel set his tool into the stream of the water exiting from the cannon and the force of the water against the shovel moved the monitor’s aim with the greatest of ease and thus led to the invention of the ball and socket design we know today.
Monitors were made at the Joshua Hendy and the Parke and Lacy Company in San Francisco. Also monitors and hydraulic equipment were made locally in the Nevada City Foundry. The Malakoff mine pit on the San Juan Ridge is a testimony to the avarice that was part of the California gold rush, and to one of the nation's first environmental protection measures.
In 1850 there was little gold left in streams. Miners began to discover gold in old riverbeds and on mountainsides high above the streams. In 1851, three miners headed northeast of what is now Nevada City for a less crowded area to prospect. One miner went back to town with a pocket full of gold nuggets for supplies and was followed back by many prospectors. These followers, however, did not find any gold and declared the area "Humbug", thus the stream was so named "Humbug Creek". Around 1852, settlers began to arrive in the area and the town of "Humbug" sprang up. These miners could not decide how to move the dirt to a place where there was water.
By 1853 miners invented a new method of mining called hydraulic mining. Dams were built high in the mountains. The water traveled from the reservoirs through a wooden canal called a flume that was up to forty-five miles long. The water ran swiftly to the canvas hoses and nozzles called monitors waiting in the old river beds. The miners would aim the monitors at the hillsides to wash the gravel into huge sluices. Over time the monitors became bigger and more powerful. Their force was so great they could toss a fifty pound rock like a cannonball or even kill a person. Over 300 Chinese worked on this project and two Chinese settlements existed in North Bloomfield (Humbug).
In the late 1860s, the towns of Marysville and Yuba City were buried under 25 feet of mud and rock, and Sacramento flooded repeatedly. The farmers in the valleys complained about the tailings that flooded their land and ruined their crops. Thousands of acres of rich farmland and property were destroyed as a result of hydraulic mining.
By 1876, the mine was in full operation with 7 giant water cannons working around the clock. The town had grown to a population of around 2000 with various business and daily stage service.
In 1880, electric lights were installed in the mine and the world’s first long distance telephone line was developed to service the mine, passing through North Bloomfield as it made its way from French Corral to Bowman Lake.
By 1883, San Francisco Bay was estimated to be filling with silt at a rate of one foot per year. Debris, silt, and millions of gallons of water used daily by the mine caused extensive flooding, prompting Sacramento valley farmers to file the lawsuit Woodruff v. North Bloomfield Mining and Gravel Company. On January 7, 1884 Judge Lorenzo Sawyer declared hydraulic mining illegal.
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Not my final rig, but probably my most powerful rig. Now to get my iMac in (in a few days), and we'll be set!
Milk Monitor records your baby's feeds and needs in a simple tap. Get rid of those lists and scraps of paper by keeping track of your baby's breast & bottle feeds and other daily events such as sleeping, dirty nappies & medicine.
Full-size replica of USS Monitor at the Mariners Museum. USS Monitor was the first ironclad warship commissioned by the US Navy. The original ship is most famous for the "Duel of the Ironclads" engagement with CSS Virginia on March 9, 1862.
P1120029
Since our last visit to Portsmouth, M33 is now fully open to the public and restored as far as possible to her Great War configuration
My new monitor that I got for Christmas! I like it very much and I have been wanting/needing a new one ever since I got into photography about 3 years ago. It actually looks smaller in the photo but in person it is pretty big. The only problem with upgrading to a new monitor like this is that it is much clearer, therefor I have been editing every single photo from the start all wrong, and I can see imperfections in my photos that I did not see with my old monitor. Anyway, there it sits on my grimy desk…
This is where I spend most of my time working on Today. Teases, opens, and whatever else that needs to be done at any moment is cut in here.
"Bengal Monitor" or “Common Indian Monitor", is a monitor lizard found widely distributed over the Indian Subcontinent, as well as parts of Southeast Asia and West Asia. This large lizard is mainly terrestrial, and its length can range from about 61 to 175 cm from the tip of the snout to the end of the tail.
Location: Tadoba Tiger Reserve - Maharashtra, India
Ecologist Katy Delaney uses a dip net to collect and observe species.
Researchers are monitoring 46 sites in the recreation area to determine the status and long-term trends in the distribution and relative abundance of aquatic amphibians. They also want to determine environmental and physical features that may influence amphibian populations in the Santa Monica Mountains.
The permeability of amphibians' skin and long life (more than 10 years in some species) makes them especially vulnerable to cumulative changes in airborne and waterborne ecosystem stressors.
Monitoring the status of native amphibians helps us detect changes over a broad landscape involving multiple watersheds subjected to various levels of urbanization, pollution, and non-native species, which can help to inform resource management decisions and actions.
Today I will follow all the instructions and stick the little gizmo on my chest to monitor my sometimes irregular heart. It has to remain in place for 2 weeks, recording.
For Our Daily Challenge 'What's in the box?'
The computer bleeped every time we moved the mouse, as if it was some sort of an error. God I love the broken stuff laying around in ICT
The most comfortable scene I had to be in. Just laying down in bed facing up towards the camera. (Photo by Streeter)