8 GeV & MiniBooNE Construction Pictures

Decay pipe and beam absorbers.

The following pictures document the civil construction for the MiniBooNE decay pipe and beam absorbers.

08/29/00 The PVC liner arrives at the construction site.

09/18/00 A view o the decay pipe region looking south toward the MI-12 and target-hall.

09/28/00 The beginning of the liner installation. This material is often used in landfills to restrict migration into groundwaters.

09/28/00 A lot of tug and pull seems to be involved in the liner installation.

10/05/00 A view toward the target hall sowing the completed liner installation with protective plastic covering the upper level of the excavation.

10/05/00 The rebar for the 25m and 50m base slabs being assembled top-side to save time.

10/10/00 The gravel as poured at the bottom of the liner. The 3 foot thick concrete wall is also seen.

10/20/00 Form work going up prior to the wall pour at the 25m absorber.

10/20/00 Iron workers setting reinforcement steel at the 25m absorber.

10/20/00 Unloading a "blue block" off the truck as it is delivered from the bone-yard.

10/20/00 Number 1 block going in!.

10/20/00 Placement of the "blue blocks" at the 25 m absorber.

10/20/00 Preparing to lower the muon monitor into position behind the 3 foot concrete wall.

10/20/00 The muon monitor as it is lowered into position.

10/20/00 Ever so gently!

10/20/00 A touch more!

10/20/00 Start of process to attach the muon monitor to the 3 foot concrete wall.

10/30/00 View looking north along the decay pipe region.

10/30/00 The south wall of the 25m enclosure, shows the opening for the decay pipe, and a stack of scaffolding being prepared for installation in the target hall.

10/30/00 Downstream of the 50m absorber we can see the progress on the cooling line installation. The first layer of cooling lines have already been buried below the CA-7 gravel.

11/09/00 Beam's eye view looking down the decay pipe from the target hall toward the 50m absorber.

11/10/00 Moving the decay pipe into place at the target hall.

11/10/00 An overview that shows the decay pipe installed at the target hall, the decay pipe flange being installed at the 25M absorber enclosure, the base slab for the connection to the muon detector pipe, and assorted stage of completion of the air-cooling pipes.

11/10/00 Setting the decay pipe into place at the 25m absorber enclosure.

11/10/00 Looking south at the 50m absorber area, showing various stages of completion of the air cooling pipes. The plastic that was to protect the side slopes of the excavation is in disarray, caused by a storm a few days before.

11/13/00 Completed decay pipe looking north from the 25m absorber area.

11/13/00 Completed decay pipe looking south from the 25m absorber area.

11/14/00 Detail of decay pipe attachment to enclosure.

11/14/00 A view looking north at the cathodic protection system.

11/14/00 The terminal point of the decay pipe, at the 50m absorber, has a three inch gap. This will be filled with gravel.

11/20/00 The PVC liner has been attached part way up the target enclosure. Some disturbing signs here: Using the monitor tubes to tie off and support the liner; torn liner; and possible holes where support lines are tied to the liner.

11/20/00 Installation of CA6 fill just downstream of the target enclosure, where the liner has been attached to the poly-grip on the building.

11/20/00 A view of the area between the target enclosure and 25m absorber enclosure, showing the last layer of cooling pipes. The decay pipe is covered with CA6.

11/20/00 The little muon counter (lmc) pipe attached to the decay pipe. Form work is taking place for the concrete pour around the lmc-decay pipe joint.

11/20/00 The end of the lmc pipe is within the region enclosed by the liner. This must be corrected: The lmc pipe must end well outside of the liner.

11/20/00 A view of the entire lmc pipe, including the form work, location next to the 50m absorber, and cooling pipes.

11/20/00 A suspicious fault was discovered in the weld of the liner to the poly-lock at the decay enclosure. This led us to investigate ways of testing the liner as construction continues.

11/20/00 A detailed view of the joint between the lmc pipe and the decay pipe. This joint will be encased in concrete.

11/20/00 The end of the lmc pipe. This end must protrude beyond the end of the liner, so some fix is needed here.

11/20/00 Looking along the lmc pipe. It seems to be pretty straight.

11/21/00 The form work continues at the lmc/decay pipe joint, even as the CA-6 is poured and compacted.

11/30/00 Just downstream of the target enclosure, finishing up the last layer of air cooling pipe.

11/30/00 Loading CA-6 onto the conveyor.

11/30/00 An overview of the work at the decay pipe. The final layer of air cooling pipe is being covered with CA-6; a crane is removing equipment from the excavation area.

11/30/00 Pouring CA-6 under and around the last payer of air cooling pipes.

12/04/00 The 25m enclosure with the CA-6 installation nearly complete. The remainder of CA-6 will be poured when the liner is closed-up.

12/04/00 The area downstream of the 50m absorber was over excavated. The lmc pipe should protruded through the back of the liner.

12/04/00 Looking south at the decay pipe region, as it is prepared for the closure of the liner.

12/04/00 The manhole for the communications duct at Geise Road is closed up.

12/04/00 Looking at the point where the lmc pipe joins the inside of the decay pipe. The connection was done very well.

12/04/00 A view of the downstream end of the decay pipe, lookin at the decay pipe cover. A few inches downstream of the cover begins the 50m beam stop.

12/04/00 A view along the decay pipe, through the 25m absorber to the target enclosure.

12/04/00 Taking a photograph of someone trying to take a photograph in bad light.

03/22/01 Looking south along the decay region, the muon monitor cable duct is still standing tall.

03/30/01 Looking north along the decay pipe through the 25 meter absorber region. The enclosure is filled with about a foot of water, covered with ice. We found it impassable.

03/30/01 Our intrepid crew inspecting the lmc pipe.

03/30/01 A view from the top.

04/06/01 Looking south along the decay pipe, we can see an area where the liner has fallen from the excavated slope.

04/25/01 At long last, work begins again at the decay pipe liner.

04/25/01 A lot of progress was made in a very short time.

04/25/01 Welding to the north wall poly-grip has been done.

06/14/01 Arrival of the lmc enclosure.

06/14/01 Completed liner on east side looking toward MI-12.

06/14/01 Completed liner on west side looking toward MI-12.

07/12/01 Only a small portion of the liner remains exposed. Backfilling in this region awaits relocation of the creek and insertion of the enclosure for the little muon counter.

07/12/01 Looking south from the 50 meter absorber region toward the 25 meter absorber enclosure.

07/12/01 Forming up for the next lift of the 25 meter enclosure.

07/19/01 Looking down into MI-12 with the 25 meter enclosure in the background.

07/19/01 A portion of the liner remains uncovered at the 50 meter absorber. At this point Earth Tec has carried out tests of the liner and shown that it has no leaks.

07/25/01 Looking across MI-12 toward formwork at the 25 meter absorber enclosure.

08/16/01 The downstream end of the decay pipe region continues to await earth cover. This region can be filled only after Indian Creek is re-diverted.

08/16/01 A view showing the final configuration of cooling pipes coming from the decay pipe surroundings. These pipes will ultimately tie into the heat exchanger.

08/23/01 The 25 meter enclosure hatch, nearly done.

10/19/01 Except for back-fill, not much work is getting done in the decay region.The lmc enclosure has not been installed at this point, and the excavation at the end of the decay pipe is still open.

11/01/01 The concrete pad for the air exchanges at the decay pipe berm..

11/25/01 Concrete block that will be used as part of the absorber at the 25 meter point in the decay pipe.

11/25/01 Excavation and pad for the little muon counter enclosure at the end of the decay pipe.

11/30/01 The heat exchanger at the Decay-Pipe.

11/30/01 Looking down upon the little muon counter enclosure.

11/30/01 A view south toward MI-12, from the lmc excavation, showing the monitoring wells, air heat exchanger, and completed earth work.

11/30/01 A detail of the lmc pipe as it enters the lmc enclosure.

11/30/01 Another view, looking west, of the air heat exchanger.

12/10/01 The decay berm air heat exchanger.

12/10/01 Backfill over the little muon counter enclosure. Only the access shaft is visible.

12/10/01 Detail of the duct work at the air heat exchanger.

12/10/01 More detail of the duct work at the air heat exchanger.

01/03/02 Looking north along the berm at backfill operation.

01/03/02 Looking northwest along the decay-pipe berm at the sub-station, concrete block for the 25m absorber, and the berm heat exchanger.

01/12/02 Backfill near the 25m absorber.

01/12/02 Concrete blocks for use at the 25m absorber.

01/12/02 Backfill operation near the little muon chamber enclosure.

01/12/02 Indian creek on the west side of the berm.

01/12/02 View from the west side of MI-12 looking south.

01/12/02 The 25m absorber enclosure covered with a tarp.

01/24/02 Looking north along the decay-pipe berm.

01/24/02 Completing the backfill around the little muon enclosure.

01/24/02 Looking north along the western slope of the decay-pipe berm.

01/24/02 The upstream monitoring wells.

01/24/02 Looking north along the eastern slope of the decay-pipe berm.

04/15/02 250 Ton crane holding up the concrete block for last minute repair before installation into the 25 meter enclosure.

04/15/02 Rick Ford, the berm air heat heat exchanger, and the concrete block held by the big crane.

04/15/02 Joel Misek, and the 25 meter absorber modules.

04/15/02 A little trimming along the edges before installation.

04/15/02 A feeble attempt to get the entire boom in the picture. This crane is tall enough to reach the top floors of Wilson Wall.

04/15/02 The 250T crane entering the job site.

04/15/02 Another look at the crane and the full extent of the folded boom..

04/15/02 The baseplate steel after it is placed on the floor of the enclosure.

04/15/02 Installation of the concrete module.

04/15/02 Installation of the muon module.

04/15/02 Installation of the first steel module.

04/15/02 All modules installed in the down position.

04/15/02 Installation of a support beam.

04/15/02 Support beams in place; ready for lifting the modules into the above beam position.

04/15/02 Lifting the second module into the above beam position.

04/15/02 All modules in the up position.

04/15/02 Installation of the heavy concrete blocks at the top of the hatch.