April 19, 2019 -- MamaJo's first cut into bedrock. Click on this link to see sheared rock coming out. MamJo's first cut into bedrock April 19 Click on this video for animation Animation shows cutterhead working
April 15, 2019 -- Gantries move the concrete liner pieces forward on a conveyor. Each piece will be attached amd connected to make a ring. Click on this link to vide annimation of how it works. Animation - How segments connect
April 1, 2019 -- View of iner pieces #2 and 3 are attached. These are the precast concrete ppieces we tshowed in earlier photos. Once attached, they have an inside diameter of approx. 16-feet.
March 27, 2019 - Photo below shows first liner pieces being connected. Crews are working in the Tunne Boring Machine.
March 20, 2019 -- Photo below shows the gantries placed in the pump station area. The pump station is just east of the working shaft where parts of Mamajo are already connected. Gantries house the segment feeder to transport the concrete liner pieces forward for installation. Gantries also house the slurry pump, control cabinet, the bentonite supply system and hydraulic pumps.
March 12, 2019 -- Photo below shows three parts of Mamjo connected and preparing for the five mile journey.
February 11, 2019 - Last week two pieces of Mamajo were send down the working shaft. The photo below shows the machine after some of the connections were placed.
February 4, 2019 -- Construction crews began lowering MamaJo through the working shaft on Dwenger Avenue. High winds and sub-zero temperatures delayed lowering Mamajo, because of the weight of the cutterhead – 200 tons. Finally, Mamajo was lowered down the 220-foot working shaft. Here are two videos of the lowering and a photo below. Click: MamaJo lifted to begin journey Click: Mamjo sits over Working Shaft before lowering
December 18, 2018 -- Work continues on getting Mamajo ready to dig. This photo shows the concrete linner pieces that will be instlaled as Mamajo progresses. The 5X7 foot pieces connect to become the tunnel liner.
October 25, 2018 -- Work continues at the working shaft and pump station shaft as well as the neighborhood drop shafts. All but one of the drop shafts are under construction. This photo shows the equipment in place at the intersection of Berry and Thieme.
September 21, 2018 -- Work is beginning on the drop shaft in west central this week. Six of the seven neighborhood drop shafts are now under construction. CLICK here to see VIDEO of recent MamaJo tour 9-9-18
September 10, 2018 -- A message from MamaJo: "Thanks to all of you who came out to meet me on Sunday, September 9 -- and gosh there were a lot of you. I'll NEVER remember all your names. You might have had to wait a long time to see me, but I hope it was worth it and that you didn't get too cold. I've heard it can get really cold here in the winter so I'm looking forward to going underground before winter weather hits.
If you had your picture taken with me, please click here to download photos. Our photographers are uploading the photos today and it may take a little time, so please be patient. Thanks again for visiting me and I'm looking forward to keeping you updated as I prepare for my undergound journey."
September 7, 2018 -- MamaJo is ready for visitors on Sunday May 9 from 11 a.m. to 3:00 p.m. The tour takes about 35 minutes. Please -- no flip-flops. The tour will be by trolley with three stops. It takes about 35 minutes. Parking is in front of the Pollution Control plant near the trolley boarding area.
August 31, 2018 -- Tour MamaJo on September 9. Crews are working to get her ready for your visit. Also, crews are busy working on drop shafts near Headwaters Park West and near Guildon park. Clik on the links to view videos.
August 7, 2018 - Today City Utilities unveiled the name for the 400-feet long Tunnel Boring Machine – MamaJo! Voting was cast earlier this year and the name, MamaJo won with more than 43% of the vote. In addition, you will be able to see MamaJo in person! On Sunday, September 9, from 11:00 a.m. to 3:00 p.m. at the working shaft site near the intersection of Dwenger and Glasgow Avenue, City Utilities will be hosting tours of the site. More information to come.