This
was on the news this morning. “It is currently 22 degrees in Boston. I
have got good news and bad news. The good news is that it is going to
be a bright sunny day outside. The bad news is that the sun is already
up.”
Also in the news. Apparently when the bid dig was
constructed, they expected 500,000 gallons of water to seep in each
year. That is 2 Olympic size swimming pools each year flooding into a
tunnel that millions of people are traveling through. This year
however, a huge leak has been flooding the main tunnel. So far, an
extra 4 million gallons of water has come in. That is 16 extra swimming
pools of water filling the tunnels under Boston. I do not know about
all those SUV’s out there, but I KNOW my car will not drive through 16
swimming pools of water…
Speaking of the Big Dig.
The
South End consists of a lot of old manufacturing buildings. These
buildings have mainly wooden supports under them. When the Army Corp of
Engineers studied the area before starting the Big Dig, they concluded
that the water table would not be affected enough to damage the
supports. After that study was finished, the city decided to expand the
subway system in the same area. Again a study was done, and again the
Army Corp found that no damage would be done. A few days ago, about ten
years too late by my count, the US Army Corp of Engineers announced a
slight problem with their studies. They did not add them together.
Since they were done independently of each other, and before the other
projects had started, the Big Dig study did not take in to account for
the Silver Line project and the Silver Line study did not account for
the Big Dig. The end result: blocks and blocks of manufacturing
buildings in the South End with wooden supports that are rotting away.
UPDATE:
They announced today that it is really 26 million gallons in the past
10 months. That is 104 Olympic sized swimming pools. And there is water
pooling on the roof of the tunnels.
How
could this happen you ask? Well let me explain. Most tunnel projects
include two walls. One called a slurry wall, and then the actual tunnel
walls. The slurry wall forms a rough box around the tunnel. It is meant
to slow the water down and to keep pressure off the tunnel walls. Then,
a water tight box is created inside the slurry walls. Inside that box
is where the roadway is. In the Big Dig, they decided that the could
not afford two walls. So they decided to just put the roadway inside
the slurry wall. Because of the way they are constructed, slurry walls
are really hard to make water tight, so they just did not make them
water tight. Instead, they built a pumping system that would remove the
water. They planned for 500,000 gallons. So far the are getting 52
times that a year. There are over 400 confirmed leaks in the system. In
September, there was a spectacular leak in the main tunnel. I drove
past it a few times, it looked like a fire hydrant was turned on.
Since
that leak, the Legislature has been investigating the problem.
Amazingly enough, they discovered that they contractors that were hired
to finish the tunnels have been patching leaks for the past 2 years
instead. They have also been hiding it from everyone. So far, the
system has cost about $14 billion dollars.
It reminds me of
when I was a kid. Building dams in the creek out back after a big rain
storm. We would build the dam, and then plug the holes with temporary
little plugs that always washed away. It seemed like no matter how much
we plugged up the dam, the water always still got through. There was no
way to stop it once it started to wash away the dam.