CDSG Forums Forum Index CDSG Forums
A place to discuss all aspects of Coast Artillery
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Fort Adams - Postern Tunnels Project

 
Post new topic   Reply to topic    CDSG Forums Forum Index -> Photo Gallery
View previous topic :: View next topic  
Author Message
Z-man



Joined: 24 Aug 2007
Posts: 331
Location: CONNECTICUT

PostPosted: Thu Oct 24, 2013 3:27 am    Post subject: Fort Adams - Postern Tunnels Project Reply with quote

We owe inspiration for this project to a local friend of the fort, Dave Dewhurst. With his urging

- and pump - we have been working on a couple of flooded tunnels at the fort. The tunnels in

question lead from the posterns in the Southwest and Southeast walls to the Crownwork. The

Southwest and Southeast tunnels are mirror twins. The areas in question are shown in the red

circles below


Not only does this set of tunnels provide communication between the Crownwork and the main fort,

but they also provide communication within the Crownwork. In this role the tunnels provide

communication between the main bastion tunnels, and the demi-bastion tunnels on each end. Each

tunnel is a mirror twin of the other. In each case there is a "curved" staircase leading down

into the tunnel on the interior /bastion side of the crownwork. On the side nearest the demi-

bastions - the staircase leading down into the tunnel is straight. The pair of staircases leads

down to a landing. From there a lower tunnel leads back to the main fort. Below is a plan view

of the Southwest postern. I created this by "flipping" a drawing from the HABS survey - available

from the Library of Congress (loc.gov)


Below is a section drawing of the Southeast Postern - but it works equally well for the Southwest.

Note that the tunnel is shown as flooded and the drawing is incomplete. It doesn't show the

landing, or the lower level of the tunnel back to the main fort. In this drawing the crownworks

is on the left, and the main fort on the right hand side.


We decided to start on the Southwest Postern tunnel. Although we ran the pump for a good amount

of time in advance - we were greated with TORRENTIAL rains the night before and morning of our

scheduled effort. The tunnels have several structural issues at this point, having been modified

for utilities by the Army. In addtion there was a manhole cover into the tunnel that had a pond

form right above it. Needless to say the pump couldn't keep up. In spite of all this we still

made progress.

5-6-2012 - The first workday.
An early view of our progress - you can see the curved stairs leading down into the tunnel are

choked with a variety of debris


A portion of the debris ready to be hauled off


Our completed progress for the day - starting down the curved stairs in the crownworks



Looking across the "landing" level of the tunnel looking across to the "straight" stairs to the

West. The tunnel vault is pierced by a large iron pipe. It runs to the right, north along the

tunnel leading back to the postern of the main fort. This level of the tunnel is a couple of feet

lower than the "landing" level.


From the "straight" stairs looking to the East. Dave with flashlight is standing on the "landing"

level looking through the tunnel to the main fort. Jack in the bright orange waders is standing

at the bottom of the "curved" stairs.


A view from the Postern of the main fort looking at the tunnel entrance leading to the Crownworks.

At one point someone attempted to seal this with sacks of concrete. Note electrical conduit to

the left side leading into the tunnel. This would appear to be for some sort of old sump pump in

the tunnel.


A closer view




8-10-2013 - the second workday
More than a year later, at the height of the dry season, and after some helpful prodding by Dave,

we returned to the Southwest Postern tunnel. This time we brought along our secret weapon, Doc

Perry. In addition we were backed up by the crew from Navy Legal. This time the pump was able to

complete pump the tunnel down to the landing level. In the pictures below, look for the dark /

light transition. This will show you the water level prior to the pump down. Unfortunately - I

only had my cell phone this day - so sorry about the picture quality








Doc and Navy Legal hard at work - me goofing off shooting a video Smile
http://www.youtube.com/watch?v=sPyoLgHuda0


A set of images showing the progress. Looking down the curved stairs.


Looking down the tunnel to the main fort from the crownworks. According to Doc, the tunnel runs

downhill to the main fort, although the fort is higher than the crownwork. The white object is

some type of old electric sump pump. It was at the lowest point of the tunnel near the main fort.


Looking up at the straight stairs from the landing.


The "finished" product after some additional polishing by Doc.


Youtube video of the day's progress
http://www.youtube.com/watch?v=HwTeuvELCKk

8-31-2013 The third workday.
Unfortunately I was not able to attend this workday. For this event, the effort was shifted to

the Southeast Bastion. The is the plan view from the HABS survey.


The following picture supplied by Doc. Pump down in progress. Tunnel contains a variety of debris


The landing level, completely pumped down. This is the mirror twin of the Southwest tunnel.

Curved stairs visible to the West. Tunnel leads to the right from landing to main fort.


The finished product.


Found artifacts.

_________________
www.fortadams.org
Back to top
View user's profile Send private message
gmack24



Joined: 04 Mar 2012
Posts: 13
Location: boston, ma

PostPosted: Thu Oct 24, 2013 3:53 am    Post subject: Reply with quote

Amazing Effort !!!
This has probably flooded for what at least 40 years if not more ?
Amazing.

Well Done !!!!! Now will it stay dry ? or will you have to install some sort of permanent or semi-permanent set of sump pumps ?

In either case well done. Must have been quite a feeling to get that accomplished. : )
Back to top
View user's profile Send private message Visit poster's website
Z-man



Joined: 24 Aug 2007
Posts: 331
Location: CONNECTICUT

PostPosted: Thu Oct 24, 2013 8:51 pm    Post subject: Reply with quote

The Southeast tunnel is staying dry - but the Southwest one continues to flood for a variety of reasons. We can pump it back down in about a day. We have to borrow the pump at this point.
_________________
www.fortadams.org
Back to top
View user's profile Send private message
Otto



Joined: 31 Aug 2012
Posts: 39
Location: Oregon

PostPosted: Sat Nov 02, 2013 6:09 am    Post subject: Reply with quote

Maybe you guys need to install a permanent sump pump down there with a float switch to keep it dry, until you can figure out why it keeps flooding.
Back to top
View user's profile Send private message Send e-mail
vert306



Joined: 31 Jan 2012
Posts: 18

PostPosted: Mon Feb 10, 2014 8:49 pm    Post subject: Reply with quote

Are the pics gone? Was interested in seeing them.
Back to top
View user's profile Send private message
Z-man



Joined: 24 Aug 2007
Posts: 331
Location: CONNECTICUT

PostPosted: Mon Feb 10, 2014 10:47 pm    Post subject: Reply with quote

Sorry - I let my domain expire. Looking for a new hosting co. Hopefully I'll be able to throw all the pics back up soon!

regards,

Z.
_________________
www.fortadams.org
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    CDSG Forums Forum Index -> Photo Gallery All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group