A Dive Into the Past: Washington’s Titan Missile Silo

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In the middle of Washington state’s farm country, is a unique dive that I learned about when researching the Valhalla missile silo in Texas. Once I found out about this Titan missile silo dive, I added it to our map and hoped to get to the area eventually. The site is fairly remote from any major cities, but as luck would have it, it ended up being near our route from Portland to Spokane, Washington.


The Titan Nuclear Missile

This Titan missile silo complex is much larger than the Atlas silo that I dove previously. It also had much more of the original equipment inside. I only did 2 dives here, but I could easily do more to explore other areas in the complex. You can even make your way through horizontal tunnels underwater into other parts of the missile complex if you are properly certified and equipped.

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This is a painting of the missile complex. We entered through the vertical shaft near the center.

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Traveling by motorhome made this dive a lot more accessible. We spent the night in town before the dive and then drove the motorhome right down to the dive site. It was nice to have the AC running and the awning out in the 90-100 degree heat while we suited up into our dry suits for the mid 50-degree water below.

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The dive shop has set up some benches and tables on the surface to make it a bit easier to gear up. Here we are receiving our pre-dive briefing before heading down into the tunnels.

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The entry down the old emergency escape hatch. This shaft would have been filled with sand to protect the workers inside from a blast above. If they needed a quick escape, it could be opened and the sand would fall into the room below and then they could climb out.

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The dive shop rigged up a pulley system so we could easily lower gear down into the staging room below.

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I’m heading in!

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Here you can see the sand from the escape shaft covering the floor. We made our final gear checks and prep in this room before we headed into the tunnels.  These are the last lights we will see other than the lights we brought with us.


The shop keeps a small kayak in the prep room so we can drag extra gear with us through the flooded tunnels. The tunnel behind the kayak is our entry into the silo complex.

Group Photo

Our group heading into the silo.

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The tunnels connecting the silos are all flooded. The metal flooring was salvaged long ago, so we had to make our way on exposed beams and pipes. We kept our BCs inflated so that when we missed a step we wouldn’t fall into an open hole in the floor.

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The water became deeper and deeper as we approached the silo. I actually enjoyed this because it helped to keep the weight of the tanks off our backs and the water was nice and cool in our dry suits so we weren’t too hot by the time we reached the silo. When we reached the silo through the door in the photo above, we put on our fins and masks and deflated our BCs to drop down into the main missile silo.

Here is a video I made of our hike in and dive into the silos.

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As long as we made sure not to disturb the silt on the beams, the visibility in the silos was pretty great.

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The depth of the silo was around 105-110 ft. The water temperature was a pretty consistent 55 degrees.

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The entire internal structure was supported by giant springs so that the missile and equipment were protected from shock if a bomb should go off on the surface.

TitanMissileSilo (38 of 86) TitanMissileSilo (37 of 86) TitanMissileSilo (35 of 86) Fortunately for us, these are no longer “hot.”

TitanMissileSilo (34 of 86) TitanMissileSilo (32 of 86) I like to find all the serial number tags on the old equipment in the silo.

TitanMissileSilo (31 of 86) Here, I am looking up toward the blast doors on the surface. You can see the platforms that fold out of the way when the missile would be lifted to the surface to fire.

TitanMissileSilo (29 of 86) This was the only bit of color in the silo. I believe these are pressure release valves. They were probably for the fueling of the Titan missile.

TitanMissileSilo (20 of 86) The staff would use an intercom system to communicate with various areas of the silo complex.

TitanMissileSilo (19 of 86) I think this eye wash station and elevator are a bit redundant now that the silo has flooded.

TitanMissileSilo (18 of 86) I believe this interesting looking pipe transferred the liquid fuel for the Titan missile.

TitanMissileSilo (14 of 86) TitanMissileSilo (10 of 86) I’m glad we don’t have to use the stairs to get up and down in this silo. I’m sure the people working here never imagined a bunch of people swimming around for fun inside their top-secret base.

TitanMissileSilo (6 of 86) TitanMissileSilo (5 of 86) TitanMissileSilo (43 of 86) At one point in the dive, I looked up to find the dive master sitting on a beam watching everyone. It was a bit creepy and cool at the same time.

Verdict: If you are at all interested in diving and cold war era relics, this is a very cool dive! I found the walk in through the tunnels to be just as interesting as the dive itself. If you can only dive one silo, I would choose this one. It has a very authentic feel and there are a lot of little interesting things to look at along the way. If I’m in the area again, I will try to go back and explore some more.

A website with the history of the Titan missile program.

Wikipedia page for the 568th Strategic Missile Squadron that managed this site.

You should know:

  • All diving at this site is managed by Undersea Adventures in Kennewick Washington. Contact them to find out when they are diving and the current requirements. I am not affiliated with them in any way.
  • There is no nearby re-compression chamber. Dive safe.
  • Surface temps in the summer can reach 100 degrees, but as soon as you head down the escape shaft, it cools down immensely.
  • The water temp is in the mid-50s. Dry suits are best, but a thick wet suit with gloves and hood can work.
  • There is no light in the silos or tunnels. Make sure to bring your own and bring a backup. Remember “2 is 1 and 1 is none”
  • Good buoyancy control is critical in the silos. They are deep and there is silt on the beams. If you stir up the silt, it makes the visibility worse for everyone.
  • If you are traveling by RV, you can camp fairly inexpensively at the golf course in Royal City.
  • Dive your own dive, I am not a dive professional. I do this for fun and this is a record of my trip. Diving can be dangerous if you are not properly trained and fail to follow proper procedures. Look for a local dive shop or dive club in your area if you want to go see some of these cool places for yourself!

So far, I have been able to dive the 2 known dive-able missile silos in the US. Now I’m hooked and want to find more. There must be more silos out there just waiting to be explored.

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