Water, water, everywhere
Monday, July 30th, 2007
I started my new job today with Wachs Utility Services, a company that does contracted maintenance for the Baltimore Metropolitan Water System. It was a more adventurous day than I thought it would be, as I figured I would be poking around the IT systems, setting up my work area, and meeting people in the office. It turned out that the new workstation they ordered for me had not arrived yet, so they sent me out into the field with one of the maintenance supervisors! (I was dressed for cubicle work, so of course I looked very out of place with my safety vest on, standing by open manhole covers and sinkholes around the city)
Before we hit the road, I was checking out a diagram of the different pressure zones in the system, which shows where all the water starts, is treated, and is stored for use. I learned a shocking fact today, mainly that Druid Hill Lake supplies treated water to most of downtown Baltimore, including my house.
This was shocking to me because I had always figured that they pumped water out of the lake, treated it, and then it went to my house. I learned today that it’s treated first, then sent to Druid Hill Lake, and then goes directly to the pipes, ending up coming out of my faucets. This is what’s called an “open reservoir”. It just seemed kind of dirty to me, as there’s all kinds of nasty things that can end up in Druid Hill lake. For example: Bird Droppings, Dog Droppings, Human Droppings, Squirrel Droppings, not to mention junked vehicles, dead bodies, and whatever else anyone feels like dumping in it. So that’s that… don’t spit in Druid Hill Lake, it drains into your shower.
I also got a first hand look at something that’s been bugging me since I bought my house in Locust Point. The water here has always been kind of nasty, and has a lot of suspended rust in it. I guess it’s a good source of iron, but it stains the toilet bowls, sinks, shower, and anything else it comes into contact with regularly. The other thing that always puzzled me was that my water service comes in from the alley, while the rest of the houses on my block get service from the street. It turns out, they are all fed by a 6″ main, and my house, along with just two others is served by a 3″ main in the alley, which is a dead end pipe (meaning it only gets water from one source, as opposed to being interconnected in a “grid”) Experts at my new company informed me that 3″ mains are practically unheard of, that dead end mains get full of debris much faster, and that since there are only three houses feeding off of it, it’s even more prone to have gunk build up inside it. Awesome.
This raised the question, why, oh why, did my lucky house and two others get this crappy alley feed, when everyone else got the good one from the street? My thought is that these three houses (mine, my neighbor’s, and one across the alley on Hull Street) are older than the rest, and got plumbing before the rest of the block was built on, which only warranted a 3″ main. Anyway, this is just the tip of the iceburg when it comes to making sense of a 100 year old city water system.
One of the hardest parts of the work Wachs does is actually locating the various valves and water mains they are servicing. This is the requirement for a Geographic Information System, which is based on the written records they city maintains, but is constantly updated with locational and attribute data collected every day in the field. In a system this complex, there are tens of thousands of valves, and just as many ways to lose track of them. As most of them are located in the street or sidewalk, it’s very easy for a paving contractor to lay new asphalt over them. Sometimes shady contractors will dump their trash into a valve vault just to get rid of it, cutting off access to the valve controls. Sometimes the as-built drawings for a new main aren’t right. Sometimes whole sections of the system are re-done, abandoned, or removed, but the records weren’t updated properly. There’s a whole tangled web of pipes, installed at different times over the past century in a city that is constantly expanding.
I learned of recent events in Washington D.C., where firefighters were powerless to stop a blaze because the hydrants had no water, and the valves that fed them were seized… this is the kind of thing that preventive maintenance avoids, (also, if you don’t open or close a valve that has been sitting in the ground for a few decades, it much more likely to break when you finally need to open or close it)
The maps reminded me of Sim City, and I now have a desire to play that game again, and actually put some thought into designing the water system.
I also learned today that fire hydrants are tied in directly to the same mains that feed your house, at least in Baltimore. Someone once told me that they are fed from a separate set of mains that run parallel to the ones that we drink from, and that fire hydrant water was non-potable. Debunked! This is why they can hook you up to the fire hydrants for temporary water when they are servicing the mains.
We ventured into the city where a field team was re-routing water after a main break. An entire street had caved in, slumped about 5 feet and cracked to pieces, after running water eroded the soil beneath it. It was pretty wild to see what water can do over time if it’s left to run. They said the erosion was so severe that it was encroaching on the foundations of some of the homes.
Down on Charles Street, we were locating valves for a temporary shutoff that would occur at night. Our GIS printout showed three critical valves that were nowhere to be found. After considerable analysis they were able to figure out what was necessary for the shutoff, but this was just another example of the maps and the system not jiving. There are probably hundreds of these incidents a week, and we use the GIS to correct them as best we can.
It was a long day, and a long blog posting to go with it. I dig this stuff… it’s maps, history, exploration and a lot of problem solving… and I get paid for it! I’ll try to keep you posted as I get settled in.
-C


































This is the elevator button panel. You will notice that the 4 has been replaced with an “F”. My father explained to me that the sound of the number 4 when pronounced in Korean sounds the same as “death”, so it is avoided at all costs. It’s like skipping the 13th floor.
I encountered this dig living near the ferry crossing site. His owners had made a little doghouse from plastic tubs and a board, and he had a bowl full of Ramen noodles and meat chunks. He seemed a little skiddish, and needed a bath, but he was still fun to play with. I hope to get my new dog in August.
My father, Jon Whong, his wife, Yea Won, my Komo, and Me.
This is Tak Sa Jong, a creek where we went camping and rafting in 1986. My dad says I was too scared to go down the rapids in the raft, so they had to let me off on shore, where I walked… then they picked me up again downstream. What a wuss.
This is a plaque on the front of the Shin Hwang building. (Hwang is another way to spell my last name in English) This building is in downtown Jecheon, and is owned by my father’s cousin, Hwang Ik Chuk. (I call him Kun Aboji, which means Uncle) This building is in the heart of the Jecheon commercial district, which is full of upscale shopping establishments.
The man on the right is my Kun Abogi. This was taken in his home prior to our excursion to explore the surrounding areas of Jecheon. This town is surrounded by huge mountains, and massive limestone formations. The natural environment is simply beautiful, and there are hundreds of streams and creeks making their way down the steep slopes. The windy roads made me long for my TT!
After a lunch of noodle soup, Kal Guk Soo (hand cut noodles), we stopped at a little farm. My Aunt bought a years supply of Garlic, which you can see in this picture. They weave the garlic plants into bunches, and hang them up. I also encountered a cow and her calf, who didn’t seem to like me very much.
We went to a lake with some little rock islands, and a few shops. Apparently, we were here in 1986 as well, but I don’t really recall it. The scenery was breathtaking, as the tops of the mountains disappeared into the low clouds… pretty amazing stuff.
After a kind gentlemen let me use the restroom in his restaurant, I felt obliged to buy something, so I found some ice cream in a tube for 1000 Won. I have never seen anything like this before, but it was delicious, cold, and not at all messy. It’s called “Boy meets Girl” for some reason… whatever.
We went to a historic site, with buildings from the late Joseon dynasty. All of these buildings were down by the river, but they built a dam in the 80’s and had to relocate them all. Eugene is shown here standing next to a guard.


This is the view from one of the relocated buildings. The Han river can be seen in the distance; the fog has settled in the valley.









