Friday April, 9, 2021 – MamaJo is nearing the 4-mile mark -- which should happen sometime this weekend. Meanwhile, crews at drop shaft 1 (Foster Park) completed the concrete liner pour.
April 2, 2021 – A busy week at the drop shafts. Here’s a video link from activity at drop shaft 3 (Brown Street) and drop shaft 5 (Thieme Drive). Click this video link April 2, 2021 Drop Shaft Work
March 26, 2021 -- MamaJo is closing in on the 4-mile mark. Currently she’s drilled 20,637 feet with another 3,927 go -- just under 3/4 of a mile to go. Below lef is drop shaft 3 (Brown Street) where crews were removing dirt this week and on the right drop shaft 5 where crews were working on the east wall of rebar for the diversion structure. (week of Mar 22-26).
Photo below shows water ingress flowafter drilling through packer. The photo gives us a good look at the pipes and tubing installed to build the tunnel that will come out when it's completed. Pipes and tubes connect elctrical, air/oxygen flow, slurry system, etc. As of today (3/26/21) -- crews have installed 4,082 - one-foot thick concrete rings to line the tunnel. They have 785 left to install. It takes six concrete slabs to make one ring.
March 19, 2020 – Drop shaft work continues throughout the tunnel works program. Photos below taken this week -- on the left where we see drop shaft 5 (Thieme Drive) where the thimble which provides a fixed dimensional opening to the pipe and diversion structure was installed and ironworkers -place rebar. The photo on the right shows view from inside drop shaft 3 (Brown Street) where wall ties were removed.
Below on left we see the vortex installation at drop shaft 7 (Guldlin Park) and rebar installation at drop shaft 1 (Foster Park). Week of March 15-19.
March 12, 2021 - MamaJo should be hitting the 4-mile mark later this month. Below left shows workers at drop shaft 5 (Thieme Drive) where progress continues on the diviersion structure. The left photo shows crews backfilling the area at dropshaft 2 (Waldron Circle).
Worker below is securing the gantry legs to the concrete liner inside the tunnelm. March 10, 2021.
March 5, 2021 – Work continues under and above ground on tunnel projects.
Below at drop shaft 5 (Thieme Drive) iron worker install forms. Week of March 1, 2021
Below on left - drop shaft 3 (Brown Street) lowering forms, center- drop shaft 7 (Guldlin Park) showing vent, right - drop shaft 1 (Foster Park) showing scalfolding. Week of March 1, 2021
Below maintenance work continues on MamaJo, 220 feet underground. Week of March 1, 2021
March 4, 2021 -- One Mile To Go! Crews hit the milestone during second shift on March 3, 2021, making the remaining journey for MamaJo one mile. Below (row 1) is second shift crew and elow are 1st and 3rdshift crews who celebrate in the achievement.
February 25, 2021 – MamaJo continues her journey and is approaching the one-mile left to go mark. Along the route – work is on-going for our drop shafts and consolidation sewers that will connect neighborhood flow to the shafts and the tunnel.
This week's photos show the Third Street Consolidation sewer which will take flow from neighborhoods north of the St. Marys. The portion of the pipe under the river has wrapped up and piles were removed.The pipe still has about 3 blocks to go -- heading north toward third street. The last photo shows tire track markings heading up to Third Street. The last part of the pipe (about three blocks long)will be constructed under the route where the tire tracks are. Week of February 22, 2021.
Februay 19, 2021 For the second week in a row, heavy snow caused delays construction delays. Still, MamaJo, unaffected by the weather, continued moving 200 feet underground and has crossed under the Hale Street Bridge.
Photos below row 1 l-r drop shaft 2 (Waldron Circle), 3 (Brown Street), 5 (Thieme Drive) interrupted by snow on Monday 2/15. Row 2 l-r drop shaft 6 (Camp Allen, 7 (Guldlin Park), 2/15 and finally work later in the week on drop shaft 3 were crews are working on form frames
February 12, 2021 – A heavy snow and cold temperatures caused some delays this week especially where they were pouring concrete.
Below on the left shows where crews covered the rebar to protect the form frames at drop shaft 3 (Brown Street). On the right a crane is lowering a worker basket into the retrieval shaft (drop shaft 1) at Foster Park. Week of February 8-12, 2021.
Below you can see works 130 feet down at Foster Park. Week of February 8-12, 2021.
February 5, 2021 – MamaJo has passed drop shaft 3 (Brown Street) and is just north of the Hale Avenue bridge today. This week saw 8-inches of snow which caused some delays on above ground operations – but work is continuing.
Progress continues the consolidation sewer under the St. Marys, near the Harrison Street Bridge. In the photos below, you can see that crews are working inside the steel beams at a depth that is under the current river level. That’s why the coffer dams are needed. Week of Jan 31-Feb 5, 2021
Photo below on the left shows drop shaft 5 (Thieme Drive) where crews were finishing concrete for the drop shaft base slab. On the right crews work on the walls of drop shaft 3 (Brown Street). Week of Jan 31-Feb 5, 2021
Below crews dealt with a significant snow fall that caused delays early in the week. Week of Jan 31-Feb 5, 2021
January 29, 2021 – As MamaJo moves further away from her starting point near Dwenger and Glasgow Avenue, booster pumps are needed to keep the slurry lines operating for the tunneling process. That met some down time this week as she sits just south of Taylor. But work still progressed at the drop shaft locations.
Below at drop shaft #1 (Foster Park) you see on the left where crews have set forms. The photo on the right shows the walls looking upward. Week of Jan 25-29, 2021.
Below crews at drop shaft drop shaft 3 (Brown Street) had icecicles and in 2nd row left they installed heat items. On the second row - Right- is drop shaft 5 (Thieme Drive) where crews placed rebar for the diversion structure slab. Week of Jan 25-29, 2021.
January 22, 2021 – Today MamaJo is just south of Taylor Street, making her way toward Foster Park.
Photos below left – Crane removing temporary pipe at drop shaft 5 (Thieme Drive) on the right crews are placing concrete around the drop shaft - week of Jan 18-22, 2021
Photo below on left shows dept of drop shaft 7 (Guldlin Park) shows the depth of the structure – on the right we see crews completing the rebar form at drop shaft 3 (Brown Street) - week of Jan 18-22, 2021
January 15, 2020 – MamaJo’s journey is 70 percent complete. Today she’s about 300 feet north of Taylor Street. Meanwhile related work in neighborhoods along the St. Marys and Maumee River continues with drop shaft and consolidation sewer work.
Below - Photo on left shows crews pouring the mud mat at drop shaft 5 (Thieme Drive) so they can continue work. The work on Thieme is two projects the drop shaft and a consolidation sewer. On the right we see the wall being formed inside drop shaft 1 (Foster Park). January 8-14, 2021.
Below work at drop shaft 2 (Waldron Circle) shows crews working on the duct bank on the left and photo on the right is of workers installing bolts on vent. January 8-14, 2021.
Consolidation sewer under the St. Marys River, near the Harrison Street Bridge sees crews pouring placing forms below the river level and pouring flowable fill over pipes installed. January 8-14, 2021.
January 8, 2021 - Drop shaft work continues thorughout the tunnel route as we enter the year when MamaJo is expected to finish her five mile journey.
Photos below (left) drop shaft 5 (Thieme Drive) where crews are installing interior walls. on the (right) the phot shows a nearly completed drop shaft 7 at (Guldlin Park) Week of January 4-8, 2021.
Photos below (left) drop shaft 1 (Foster Park) waith wall work underway. Week of January 4-8, 2021.
December 31, 2020 – We are heading into a big year – 2021! MamaJo is scheduled to complete her nearly 5-mile journey. This week work continued at drop shaft location sand in the tunnel.
Photos below (left) drop shaft 2 (Waldron Circle) where they are pouring of concrete, and (right) forms being hoisted to go down drop shaft 1 (Foster Park). Week of December 28-31, 2020.
Photos below l-r show drop shaft 3 (Brown Street) where excavation is continuing, drop shaft 5 (Thieme Drive) where they are vacuuming and clearing out water to place the casing for the pump and inside view of the concrete structure at drop shaft 7 ( Guldlin Park).
December 23, 2020 – Crews will break for the holiday, but work continued this week.
Photos below show drop shaft 1 (Foster Park) crews installed the base mat and began installying the sensors. Week of Dec 20-23.
Below - photo on the left shows sheeting being removed at drop shaft 7 (Guldlin Park) and work at drop shaft 2 (Waldron Circle) Week of Dec 20-23.
December 18, 2020 -- Mamajo has crossed under the RR tracks south of Jefferson Boulevard and is heading south following the path of the St. Marys to Foster Park.
Work on the consolidation sewer under the St. Marys River continues. Below are photos of crews pumpiing out water inside the coffer dams so they can continue the work. This view is just east of the Harrison Street bridge. Week of December 13-18, 2020.
At drop shaft #2 forms being pulled out and progress at drop shaft #3 (Brown Street) on the right. Week of December 13-18, 2020.
December 11, 2020 -- Drop shafts 2,6 and 7 are moving into their final stages. Week of Dec-11
At drop shaft #2 below (Waldron Circle) the vortex was installed this week. Below is a wide shot showing the space it will be lowered into and here is a video link of the lower from 12-10-20. https://youtu.be/1u0sbNtOm2w
At drop shaft #6 below (Camp Allen) crews working to restore. Photo on right shows progress at drop shaft #5 (Thieme Drive) where workers continue installing support beams.
Week of Dec-11
At drop shaft #7 below (Guldlin Park) crews removed dewatering pumps, compacted sand and tested the compaction. Photo on the right shows drop shaft #3 (Brown Street/Hale Avenue) where crewxcavation continues around the drop shaft.
Week of Dec-11
December 5, 2020 – MamaJo hit the three-mile mark on Thursday, December 3, 2020. She’s just crossed under Jefferson Blvd. and is heading south.
Photos below show drop shaft 5 on left (Thieme Drive) and progress with casing from dewatering pipe cut flush to excavation. On the right we see worker welding the whaler. Week of Nov 3-Dec 4
Photos below show drop shaft 7 (Guldlin Park) where the forms are being removed. Week of Nov 3-Dec 4
Photos for below show that crews have moved to a different location on construction of the Third Street Pump Station Consolidation Sewer. Crews are pumping out water from inside the cofferdam so they can get to work on the next phase. Week of Nov 3-Dec 4
November 25, 2020 – Progress continues for the tunnel and several connecting projects. MamaJo is under the Swinney Park pond this week.
Photos below are the Third Street Consolidation Sewer project – going under the river. Photo on the left shows the sheeting that his holding back the water and on the right you can see the form and if you look to the right hand corner of the photo you see a work, that would actually be under water if it wasn’t for the sheeting. At the top of the photo you can see the inside of the sheeting wall that surrounds the workers. Week of November 23, 2020.
At drop shaft #7 below (Guldlin Park) you see on the left photo how deep the workers are as you can count the rungs on the ladders. On the right you see the concrete forms and the drop shaft at the top. Week of November 23, 2020.
November 20, 2020 -- MamaJo has completed 61% of her journey and is under Swinney Park today. She’s still making the turn to head south toward Foster Park.
Photo on left at drop shaft #2 (Waldron Circle) is more than 80% complete and photo on right shows work this week at drop shaft #3 (Brown Street) at about 75% complete (week of Nov 14-20)
Below shows his week's excafaction atdrop shaft #5 on the right (Thieme Drive) and #7 (Guldlin Park) on the left (week of Nov 14-20)
Photos from DS #6 (Camp Allen Drive) show the progress using both poured and precast concrete (week of Nov 14-20)
November 13, 2020 - Crews set the vortex in drop shaft 5 this week as work continued throughout the tunnel route. The vortex is used to deter odor and corrison caused by wastewater.
Drop shaft 6 at Camp Allen Drive - Vortex at 2,700 pounds, 10-feet high and 6.5-feet in diameter is now in place.
Drop shaft 7 at Guldlin Park - form work continues.
Work at the consolidation sewer that goes under the river continues near drop shaft #9 - Headwater Park West.
November 7, 2020 - MamaJo is under Swinney Park this week making her journey south. Drop shaft work continued throughout the route this week. Photos below show drop shaft 6 and 7.
Drop shaft 7 at Guldlin Park - Photo 1 shows the massive size of the work with workers on the side. Photo 2 shows the lowering of a concrete form. Week of Nov 2-6
Drop shaft 6 at Camp Allen Drive - work is about 90% complete. In the second photo you see a closeup of the vortext that will be hoisted and lowered down the drop shaft later this month. Week of Nov 2-6
October 30, 2020 -- Drop shaft and consolidation sewer work continues along the tunnel route. Looking back to photos from the week before you see dramatic photos at drop shaft 7 - Guldlin Park. To give perspective on the structure in these photos -- it's about 30 feet, 60 to bottom.
Drop shaft 7 at Guldlin Park - Week of Oct 26
Work at Thieme and Berry continues with a consolidation sewer and drop shaft 5 are under construction. Photos below show crews placing whalers - on first photo the drop shaft is visible on the right hand side. Week of October 26
October 23, 2020 – Heavy rains left standing water at drop shaft worksites, but crews were still able to make the week productive.
Worker’s used flowable fill before installing forms at drop shaft 7 located at Guldlin Park. Week of Oct. 19
Work at Drop shaft 6 near Camp Allen Drive saw form and dowels installed. Week of Oct. 19
Standing water caused some delays at drop shaft 5 (Thieme Drive) but crews were still able to excavate.
October 16, 2020 -- Construction continues for the consolidation sewer pipe that will transport flow from neighborhoods north of the St. Marys River to a drop shaft and ultimately to the deep rock tunnel. Currently, overflows from these rivers dump into the St. Marys River at Third Street. This outfall is the largest outfall in the sewer system.
In the photos below, you can see the work that is going on below the bottom of the riverbed. The steel sheeting is the cofferdam that holds the water. The gray whalers above the workers support the dam. The last picture, showing the men standing on the scaffolding, gives us perspective. Their feet are just below the riverbed level. If the cofferdam weren’t there, they would be underwater.
October 8, 2020 - MamaJo took a break last week for the installation of an additional pump that is routinely installed as the tunnel distance extends. The break was a bit longer than anticipated as a glitch occurred in communication with the Programable Logic Control box. Crews were successful with troubleshooting efforts and MamaJo was moving again on Tuesday (10/6). Elsewhere, drop shaft work continued in the photos below that show just how large the tunnel support projects are in neighobrhoods along the rivers.
Photos show crews working to ground the Programable Logic Control system. Week of October 5, 2020
This week's drop shaft photos are (posted 10/8/20)
Photo 1 - drop shaft 07 at Guldlin Park - St. Marys River Guldlin
Photo 2 - drop shaft #12 at East Central Park - Maumee River
Photo 1 - drop shaft #2 on Waldron Circle - St. Marys River
Photo 2 - drop shaft #6 on Camp Allen Drive - St. Marys River
September 29, 2020 - Pile driving completed today on drop shaft 5 at Thieme Drive.
September 28, 2020 -- Pile driving should be wrapping on this week on drop shaft 5 at Thieme Drive. Photos below were taken late last week.
September 18, 2020 – MamJo continues her journey under the St. Marys River, just south of Main Street. Photos below show sheeting installation began at drop shaft #5 on Thieme Drive just east of the St. Marys River and a second photos at drop shaft 12 showing the inside forms being placed near the Maumee River.
September 11, 2020 -- Consolidation sewers, near-surface sewer pipes that collect or consolidate the flow from existing sewer pipes and delivers the flow to the drop shaft, are wrapping up on a couple of large projects that have closed streets. Rudisill and Broadway opened to traffic last week with crews continuing restoration work through next week. On Superior Street, crews were paving this week and weather permitting the road stripes and lane dividers should be painted, and the road restored by the end of next week. At drop shaft #12 (East Central Park) crews were busy pouring concrete.
Consolidation sewer on Superior is aimed at keeping nearly 5 million gallons of sewage from the St. Marys River near Promanade and Headwater Park. Crews use fill-stone pulled from the deep rock tunnel on the project, which placed the 48-inch pipe under Superior Street. Crews worked on scorching hot days and in the rain. Paving began the week of (9/8/20).
Concrete work continues at Drop Shaft #12 located at East Central Park, near the Maumee River.
September 4, 2020 -- A busy week at DS #2 (Waldron Circle) where crews placed frames and poured concrete. Photos below show workers place fram with rebar, pouring concrete and revmoving forms and cleaning up debris.
August 28, 2020 -- MamaJo us approaching main street this week. It was full steama ahead for work in the tunnel and at construction sites around the city. Here are update photos from the week.
Rock being pulled from the tunnel looks to be piling up -- but it's being used on project around the community. The work on Superior Street has already used more than 2100 cubic yards of the rock. (Aug 28, 2020)
In these photos for drop shaft six (Camp Allen Drive) you see continued construction of the drop shaft and where the pipe will connect to take combined sewage into the shaft and down to the tunnel. (Aug 28, 2020)
The first photo below shows the liner at drop shaft 7 (Guldlin Park). The second shows the large excavaction where drop shaft 12 (East Central Park) will be built. The photo shows the work mat that will soon be filled with reinforced steel and the forms needed for construction.
August 20, 2020 -- A day to Celebrate! MamaJo is half way through her journey. At 3:45 a.m. today (August 20) she hit the halfway point between the Norfolk Southern RR Bridge and the Van Buren Street Bridge. Crews commemorated the event with photos of the milestone and the completion of 2,412 concrete rings.
August 18, 2020 -- Sometimes we think about MamaJo and the deep-rock tunnel and don’t realize the massive scale of projects, simoutaneously being constructed as part of our Tunnel Works program. Drop shafts abound throughout the City at East Central, Headwaters and Guldlin Park, and neighborhood projects on Camp Allen, Thieme, Brown Street, Waldon Circle and the retrieval shaft at Foster Park. These are the pipes that will drop flow down to the tunnel. We also have major consolidation sewers under construction. Pipes under construction on Third Street, Superior, and at the Rudisll/Boradway intersection will take flow to the drop shafts. Below are 10 new photos from the various locations visible above aground.
Dropshaft 2 on Waldron Circle shows existing pipe and the work that being done that will connect flow to the tunnel. - Aug 18 posting
Dropshaft 3 on Brown street shows new pipe that will take flow to the dropshaft. Aug 18 posting
Dropshaft 6 on Camp Allen reminds us of the vast amount of jobs the tunnel project is supporting. When all said and done – more than 4,000 workers will be involved. Here carpenters and iron workers assist with support structures. The second photo shows a concrete pipe installaion. Aug 18 posting
Dropshaft7 near Guldlin Park -- driving sheeting. In the second photo you can see it when it's into the ground. Aug 18 posting
The road at Rudisll/Broadway is being restored – this photo shows the consolidation sewer work that will intercept multiple pipes and take the flow to the dropshaft at Foster Park. Aug 18 posting
Work on Superior Street shows the consolidation sewer that will connect to the dropshaft at Headwaters Park. Aug 18 posting
On the northside of the river crews are busy with the Third Street pump station consolidation sewer. They will soon be going under the river to connect to the dropshaft at Headwater Park. Aug 18 posting
August 3, 2020 – MamaJo is close to halfway through her journey digging the deep rock tunnel. Now on the west side of the Van Buren bridge and ready to make the turn to head south toward Foster Park. Here is a video link of continued work at drop shaft #2 and a photo below when PFW staff and students brough visiting students from a Myanmar environmental sciences program to visit the site just of Waldron Circle.
July 15, 2020 - This past Monday (July 13) MamaJo hit the two-mile mark. Below you can see she's now just west of the Wells Street Bridge. Second graphic shows the distance in the context of the overall project.
July 8, 2020 -- Mamajo is just under the two-mile mark, and crews recently installed a slurry pump, which is needed to pump rock back to Dwenger Avenue. You can see the pump in the photos along with the tubes carrying electricity and air and the rail track. When the tunnel is completed, these items will be removed, leaving the concrete-lined 16-foot-tunnel (pipe).
June 19, 2020 - Mamajo is just east of the Wells Street bridge today. Crews have completed 10,000 feet of concrete liner. The photo below shows R (ring) 2000. Each slab 5’ long = 10,000 feet complete. The tunnel is 41% complete today, slightly behind what was anticipated, but nearly halfway done. Crews will shut down for several days to install an additional slurry pump that’s needed now that they are at the 10K mark.
May 21, 2020 - Work at Camp Allen in the Nebraska Neighborhood continues as crews install sheeting at the drop shaft.
May 07, 2020 - Crews were busy performing maintenance today. Photo shows worker cleaning the grout line from the day tank in MamaJo, the Tunnel Boring Machine (TBM).
April 14, 2020 - Busy week at the drop shafts. The first photo shows work at the drop shaft located on the east side of the St. Marys River at the end of Waldron Circle, where crews were welding pieces of the steel liner together. The second photo is the drop shaft at East Central Park off of Combs Street and just south of the Maumee River, where crews were pouring the last portion of grouting.
April 07, 2020 - Work on the drop shaft between Brown Street and Hale Avenue is seeing progress with the drop shaft with the installation of steel pipe. This drop shaft is one of seven locations under construction. The second photo shows excavating equipment being lowered into a drop shaft at Camp Allen Drive. These shafts will deliver combined sewage to the tunnel and will keep it from discharging into our rivers.
March 30, 2020 - February saw maintenance and cutter head change outs on Mamajo -- but today she is entering the downtown area just north of the deck at Don Hall's Gas House.
January 20, 2020 -- Mamajo has gone more than one mile at about 6,100 feet and is 200 feet down in front of the Water Filtation Plant. Neighborhood pump station shafts and consolidation sewers are also making progress. The consolidation sewers will intercept the flow that would normally go to the river and drop it down the drop shaft to the tunnel. New photos show work two drop shafts. First two photos show work near the intersection of Thieme and Berry -- the third photo is the drop fhsaft site near Guldin park between the St Marys River and Supperior Street, just east of the Sherman Blvd bridge.
December 16, -- Workers completed the 1000th concrete ring. You can see the connected concrete liner rings beind them in this photo.
November 19, 2019 -- At the retrieval shaft near Foster Park a dusty road get's swept and a second dewatering tank arrives and is placed in the construction zone. That tanks assist with groundwater in the shaft.
Novemeber 18, 2019 -- Man basket and pump ready for lowering at retrieval shaft.
November 6, 2019 -- Mamajo made 3/4 of a mile and is at the first drop shaft located at East Central Park. Photo shows Rock Bolt installation at Retrieval Shaft.
October 31, 2019 – Equipment being lowered into the Retrieval Shaft to assist with pump installation.
October 23, 2019 – Crews build security fencing on the north side of the Retrieval Shaft.
October 16, 2019 – Workers at the Retrieval Shaft (Foster Park) are drilling a hole for dewatering services.
October 9, 2019 – Worker securing a rock bolt at the Retrieval Shaft.
September 10, 2019 – Work continues at the Retrieval Shaft (Foster Park) as it continues its downward construction. Photo shows worker examining the progress at an elevation of 650.5 above sea level.
August 14, 2019 – Work is progressing at locations throughout the route. The night photo shows crews at the pump shaft (Dwenger & Glasgow) hanging pipe brackets down the wall. Inside the tunnel crews continue to work as MamaJo moves forward.
August 8, 2019 – Work continues at the neighborhood drop shafts, the shafts will intercept flow that currently goes to the river and drop it down to the tunnel. In this photo, grouting work is going on at drop shaft 6 near the Camp Allen Drive at West Main Street.
July 25, 2019 – MamaJo under the Maumee near the Hosey Dam today. Several members of the media visited to observe the progress.
July 13, 2019 - Above ground photo shows concrete liners in the distance and inside MamaJo you can se the liners going in place.
July 9, 2019 - Worker being lowered into the 65-foot diameter pump station shaft and photo of Mamajo's used cutterheads and new ones that will be used to continue cutting through the bedrock.
July 8, 2019 -- Rock removed after blast at retrieval shaft in Foster Park.
July 5, 2019 -- Photos below show sections of the concrete liner in place, pieces of liner ready for installation and a view inside MamaJo.
June 26, 2019 -- Work is simultaneious throughout the route of the tunnel. From working shaft at Dwenger Avenue to the drop shafts along the five mile route to Foster Park -- site of the retrival shaft pictured below.
June 25, 2019 -- Installing rail system extension.
June 24, 2019 -- As MamaJo moves further away from the Working Shaft -- the rails system is essential to take workers to their daily job. The bottom photo shows a flatbed with concrte tunnel lining segments.
June 22, 2019 -- Photo below is looking down the drop shaft located at Headwaters Park West. There are 7 dropshafts along the five mile route of the tunnel. Drop shafts will deliver combined sewage to the tunnel where it will flow to the wastewater plant for treatment. It keeps the combined sewage out of the river.
June 20, 2019 -- Follow MamaJo's story on the new Story Map. Cleic this link MamaJo Story Map
June 18, 2019 -- What does the reconstruction of Huffman Street, just off Wells, have to do with the tunnel? The stone crushed and pulled out of the tunnel by MamaJo is the perfect fill for a road project and prevents us from spending extra to buy the fill rock. Huffman had a sewer separation project and this week; crews are reconstructing the street that was torn up for restoration. The first photo is looking west from Wells Street, and the second is looking east from Short Street.
June 14, 2019 -- Photos show the additional slurry circuit installed and the segments being delivered via rail car into the tunnel for unloading.
June 13, 2019 -- Permeneant vent line was installed and is now connected to the gantry 12 (end of MamaJo, the Tunnel Boring Machine).
June 6, 2019 – MamaJo workers are extending the slurry lines and isecond photo looks down working shaft as final piece of MamaJo is in place. (photos at working shaft - Dwenger Avenue)
June 4, 2019 - Worker inside MamaJo installs segment ring in tunnel at Dwenger Avenue.
June 3, 2019 – First holes being drilled at Foster Park retrieval shaft.
May 30, 2019 Lots of work going on around town -- below truck dlivers equipment to retrieval shaft at Foster while crews are lining the drop shaft at Camp Allen, just south of Main Street in second photo.
May 29, 2019 - Workers scaling retrieval shaft walls at the Foster Park location.
May 9, 2019 - Work continues as MamaJo moves forward to continue adding on the additional gantries. This week's photos show crews connecting Gantry 6 and the unloading of additional liner segments.
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.