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This is an idea I came up with for an optimal bunker. My idea is elaborate and expensive but some of the concepts could be applied on a smaller scale.

I honestly think that in whatever type of scenario having a fully hidden, self sufficient bunker is invaluable. I will outline a few of my ideas and would like some feedback. Cost is not a factor in this analysis. I plan for this system to be approximately 75-200k sq feet.

Power:
I think the best source of power for this system would be geothermal power. Of course this limits the location of the system but I will position the system in a region with high levels of geothermal activity. Geothermal power systems do have a higher initial start-up cost but once they are up and running they require no effort to supply power/heat. This is much better than gathering fuel to power a system or relying on windy or sunny weather. The maintenance on such a system is minimal.

Water:
I think the best plan for water is to start off with an area where you have multiple water sources. Heavy rain fall; good, safe, plentiful surface water, or a well system. Having at least two of these system incorporated into the bunker are vital for survival.

Oxygen Production:
I have always had an issue with bunkers relying on external air to supply breathable air. Such systems can always be compromised is some fashion and can lead to detection of the bunker. Think of the exhaust from your system showing up on infrared cameras for example. An easy way to compromise your system if you rely on external air would be to simple block all the intake vents. Even if you have air filtration systems to filter out poisons, radiation etc. a 100% blockage of your air will result in a compromised situation. My solution to this problem is using plants to produce oxygen. I have taken some of this idea from this link. http://preparednesspro.com/undergrou...ing-literally/ I think that if the bunker has its own well, with an infinite supply of power from the geothermal generator, and a healthy (20 year+) supply of grow lights this could be very viable. Hydroponics or aquaponics systems could be feasible.

Food production:
I would maintain a seed bank. With either hydroponics or aquaponics or both, I would want two (2) one acre grow rooms. The only species that would be planted in soil would be trees. Each of these rooms would have absolute climate control capabilities to provide specific climates to best suit particular plant species. Chill hour capabilities would be provided for specific species necessary for food production. Along side fish production from aquaponics systems I would also consider raising a few basic types of livestock. Chickens, rabbits, or goats could work well and live in the grow rooms. Keep sexes separated at all times to prevent breeding unless you are in an extended lockdown situation. These rooms would also be connected to the air circulation system to provide essential oxygen for breathing.

Shop and Mechanics:
This system would include a general mechanics shop. Welding, simple metal fabrication, motor repair, tools, etc and the basics needed for system maintenance. I would also have biodiesel refinement capabilities and a wood fire gas production system. This garage would not keep a large number of vehicles underground. The purpose for all vehicles stored there would be in the extreme event that all surface structures and defenses were to fail. If everything above ground is compromised a few basic, alternative energy vehicles will be essential to rebuild.

Rec Room:
I would like to have a full recreation room with many features. Sporting equipment, fitness equipment, a lap pool etc.

Living Quarters:
This section does not need much input as everyone has their own taste and preference. However I would aim to create as much of a natural feel as possible. This would be nothing like living in large corrugated pipes or shipping containers.

Hobbies:
A printing press, wood carving, knitting, weaving, etc. Many different practical things to do with free time while in a lockdown situation.

Vault/Armory/Security Room
The system would include a high scale vault for storing valuables, guns, and ammo. This room would also contain a small gunsmith shop with tools for fabrication and repair. Ammo production capabilities would also be included. The security room would be the nerve center of the bunker. It would be the only room in the whole bunker connected to the outside world in any way. I will have shortwave radio, satellite, radar, long range capabilities for outside communication and monitoring. All outside communication will be routed to one standalone computer system to prevent hacking into the main bunker systems. Also full day, night, infrared cameras of aboveground activity will be routed to the security room. This room will also monitor all critical systems in the bunker; oxygen levels, temperature, power supply etc.

Escape:
The system will be outfitted with multiple one and two way use alternate entrances/exits.

Main Entrance:
My main idea is to have a well disguised entrance that opens into a 10 ft square tunnel. At the end of the 50-100 ft horizontal tunnel would be a vertical shaft. This shaft would be 15 ft sq and descend 50-75 ft. The shaft would contain a platform elevator the same size as the shaft. (think aircraft carrier) At the bottom of the shaft would be blast doors leading to various parts of the facility. The main security for the whole facility is that when the elevator is at the bottom the whole elevator shaft can be filled with water to prevent anyone from entering. Multiple pressurized doors can prevent any water accidents from causing severe damage. Also the shaft does not need to be filled at all times. It is simple an extra security measure. No one attempting to enter your bunker will think to bring/or have scuba gear. And if they swim to the bottom they still wont be able to get in. Additional security measures will be included.


Please give me some feedback.
Thanks.
 

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As stated in another thread, (thanks for starting your own so the other isn't hijacked):

Sounds good except for the oxygen system. Fine for supplemental oxygen, but not reliable enough for exclusive use. Unless you are in the middle of a large field with absolutely no structures around, there are several ways to conceal/camouflage air handling intakes and exhausts. Not discussed too often because people don't want to give away what they have done to keep them a secret.

There are as many options as there are locations. There are options to have dummy units, perhaps several, as well as multiple units that can be opened and closed independently to ensure a workable one no matter what is discovered and compromised.

In addition, for short term use, if under attack, or due to surface fires or other situations, an oxygen addition systems combined with a CO2 absorption system will allowone to button up tight for several hours to a few days until the situation changes or is changed by action. With multiple concealed exits and prepared fighting positions, one should be able to take action to correct the situation, barring unlimited military involvement.

Just my opinion. Feel free to ask questions.
 

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Be Prepared
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I guess it doesn't hurt to fantasize about underground bunkers with all the trimmings but unless your rich this will stay nothing more than an underground wet dream.
 

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The amount of plant material needed to produce enough O2 for people is extremely large. Add in livestock and it's almost unimaginable.

Remember that biosphere project years back? I forget the name offhand. But even with top scientists and engineers developing it, and having a HUGE greenhouse, they ended up having to add O2 because it simply couldn't produce enough.

Then if you have to grow those plants under artificial light, figure a way to generate millions of watts of power.

Time for more research or lowering your expectations to something more realistic.
 

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Got a 404 on the first link.

I'd seen the underground growing system before. Good ideas, just not enough oxygen to get by on.


As to the geo-thermal power, I think it is a good idea. I'd want alternatives, too, but as a primary source I think it is great. Don't know what else to say about it.
 

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An underground city?
75,000 to 200,000 sq ft.?
Save yourself mulit-millions of dollars and buy a missle silo.

Too much to go wrong with a geo-thermal system. There are more simple ways to heat and cool.

O2 would be too important to experiment with.
 

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Death's Collection Agent
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Besides cost, there is the fact that if the power generation equipment is in your bunker, it will heat up faster than normal. All underground bunkers heat up because you are in a closed system. The soil covering your bunker acts like insulation. The heat from a geothermal system has to go somewhere.

We built a hydro-electric system. Then again, weve had more than 30 years to make mistakes and correct them. The way we designed ours, it is "invisible" and requires very little maintenence. Just a yearly lubrication and occasional cleaning of the trashrack.
 

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With a large replenishing water supply and excess electricity one could always run an electrolysis unit and split water into hydrogen and oxygen. This would give hydrogen for heating, cooking, running generators or powering fuel cells. The oxygen generated would probably be enough to supplement that given off by the plants themselves. Just a thought.
 
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