The crumbling riprap walls of the basin, constructed back in 1985, are being replaced with what is expected to be a more durable structure. Dates of the photos appear immediately under each picture.
Jan-Apr 2016116 Images25059 visitsAlbum by AlbacorePhotos by Various
Artist Rendering. An artist's representation of what the finished basin will look like.
01-12-16 (3) Ground breaking on 12 January. Note that fencing has previously been removed for unfettered access to the basin.
01-12-16 (1) Heat blankets have been laid to keep the ground from freezing during construction.
01-13-16 (3) Locating the place to excavate for the placement of the sump pit.
01-13-16 (6) The sump pit is a key element of the new basin structure.
01-19-16 (6) Exploratory excavation alongside the port side of the aft cradle to determine if the cradle and marine railway structures are integrated.
01-20-16 (2) Excavation of the dewatering sump and exploratory location of bed rock to see if any bed rock needs to be removed.
01-20-16 (5) A closer view of the sump/explorative excavation.
01-20-16 (6) Excavation of the dewatering sump.
Sump Pit Excavation 1 Location of the sump has been moved from the original position to stay away from the propellers and to be closer to the sewer line that runs thru the park grounds.
Sump Pit Excavation 2 The sump will be the lowest point in the basin and will receive drainage from inside and outside the basin walls.
Sump Pit Excavation 3 Measuring the depth of the sump pit to ensure it will be the low point of the basin.
image001.png This is a sketch of the prefabricate concrete sump to be installed on the port side aft end of the basin.
Dewatering Sump & drainage sketch.pptx The dewatering sump is a key part of the 'new' basin and it's location is critical for success in removing accumulated water.
01-20-16 (7) Toe-Wall blocks waiting for installation.
01-21-16 (2) Partially excavated aft side of the aft cradle.
01-21-16 (3) The aft port lower control surface is completely exposed for the first time in 26 years.
01-26-16 (7) Close up of the partially excavated aft cradle. There is a question about the structural stability of the cradle. Specifically, what lies under the cradle - solid bedrock or a shale-like material.
01-27-16 (1) Installation of the de-watering catch basin/sump.
2016 [01-26] (1) Measuring the depth of the basin aft of the dewatering sump.
2016 [01-26] (2) Ice, mud and crud around the sump.
2016 [02-02] (3) Lower starboard fin almost free of rip rap and other debris.
2016 [02-02] (5) Looking forward from aft of the lower starboard control fin. Note large amount of rip rap that has slid into the lower portion of the basin.
2016 [02-02] (2) Looking forward toward the aft cradle. Note less than solid rock appearing material under the cradle.
2016 [02-02] (4) Partial arrangement of toe-wall blocks at the after end of the basin.
2016 [01-29] (1) View showing the relative positions of the dewatering sump, port lower fin and the end of basin toe-blocks.
2016 [02-02] (8) View looking aft from the after cradle toward the end of the basin.
2016 [02-10] (1) Excavation continues along the port side. Some toe-wall blocks are in place.
2016 [02-10] (2) Note concrete stabilizing pad behind aft cradle.
2016 [02-10] (10) Placement of the toe-wall continues up the port side.
2016 [02-10] (9) To enhance drainage, old rip rap and other material is removed in order to achieve the desired downward slope from the remnants of the marine railway tracks to the outside of the basin .
2016 [02-10] (7) View looking across the basin from the starboard side shows part of the toe-wall and gravel that will form the basin floor.
2016 [02-10] (6) The concrete block under the lower port fin is there as a base from which to measure any shift in the sub/fin. Note how near the after most section of the toe-wall is to the dunce cap on the propeller shaft. The basin floor will be smaller when the project is completed.
2016 [02-12] (3) This view shows the temporary support for stability of the lower port stern plane.
2016 [02-12] (8) View of part of the toe-wall showing the green colored drainage piping on both sides of the wall.
2016 [02-12] (10) Port side toe-wall looking forward.
2016 [02-15] (4) These are the discharge pipes from the dewatering sump. The sump has two pumps which can be run separately or together.
2016 [02-15] (1) The discharge pipes lead from the sump to the existing storm drain system.
2016 [02-17] (7) The truck is part of the vacuum system used to remove sand and gravel from under the hull..
2016 [02-17] (6) According to the contractor, the project is 9.3 per cent complete as of this date (2/17) and are confident of finishing on time.
