On Wednesday we tried again to mitigate all the water pouring into the unit in front of 18 Fleet Street. We attached a large nylon "sock" to the end of the water pump hoping that it would filter out all of the sediment and leave clean water that could be disposed of in the storm drain. Unfortunately there was so much sediment that it clogged the "sock" almost immediately so we had to abandon that idea. Next we tried using a large settling tank. The idea was to pump the water into the tank and let the water sit so that all the sediment would settle to the bottom leaving clean water. We found that the unit was filling up with water so fast that we didn't have time to pump the water out and then let it settle.
Yesterday we decided that given these water mitigation issues and the time restraints we're working under that we aren't going to be able to excavate this unit further. We're all a little disappointed that we won't find out if the log road extends up Fleet Street but the project managers will recommend that the City excavate further in this area. Depending on how deep they plan to bury the utility lines on Fleet Street it is possible that the log road we found won't be disturbed considering it was 4 and 1/2 feet below the current sidewalk level.
We filled in the 18 Fleet Street unit yesterday and will replace the sidewalk early next week. Guess I can say goodbye to the Wellies for a while!
2 comments:
How did the project fair in the recent storms?
The recent storms didn't hurt us too badly. We actually have closed up all the units from the Fleet-Cornhill Undergrounding project and have started the Archaeology in Annapolis field school. Luckily when the storms hit on Wednesday we had just opened the new excavations and so the units weren't deep enough for water to really collect.
Thanks for the comment and look for a post on the field school soon!
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