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North American Society for Trenchless Technology
Rocky Mountain Chapter

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  • RMNASTT Site Visit: Jackson Storm Sewer Drain Project Phase 2

RMNASTT Site Visit: Jackson Storm Sewer Drain Project Phase 2

  • 24 Jan 2024
  • 10:00 AM - 12:00 PM
  • 1350 Colorado Blvd, Denver, CO 80206


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Site Visit: Jackson Storm Sewer Drain Project Phase 2

The Rocky Mountain Chapter of the North American Society for Trenchless technology (RMNASTT) is excited to invite you to a project site tour on January 24, 2024, of the Jackson Storm Sewer Drain Project Phase 2 featuring Permeation Grouting in preparation for trenchless tunneling underneath Colorado Blvd.

This educational opportunity will offer a firsthand look at stabilizing the soil around the proposed twin 84" diameter RCPs within the alluvium material to minimize erosion during tunneling. The location of the project is underneath Colorado Blvd and south of 14th Street Crossing. The permeation grouting is being completed prior to tunneling operations with the treatment zone approximately 24 feet wide by 140 ft long and between 4.5 to 5.5 feet deep within the alluvium above the sandstone. Due to limitations to shut down Colorado Blvd., Nicholson is installing TAM (tub-a manchettes) pipes horizontally from the east side, using horizontal directional drilling from existing grade, and daylighted on the west side within a detention pond. In total 17 holes were drilled with a total of 5,942 lineal feet. It is anticipated that up to 36,000 gallons of acrylamide could be injected within the treatment area.

10:00AM to 10:15AM (Nicholson Construction)

1.       Welcome Attendees
2.       Project Safety Discussion

10:15AM to 10:30AM (Iron Women Construction)
1.       Overall Project Scope

10:30AM to 11:15AM (Nicholson Construction)
1.       Installation of PVC Sleeved (TAM) Pipes and why HDD was chosen.
2.       Installation of Permeation Grouting and why Acrylamide was selected.
3.       Tour Permeation Grouting work area and trailer.  

11:15AM to 11:30AM (BT Construction)
1.       Overview of the twin 84” ID RCP trenchless tunneling installation.

11:30AM (Nicholson Construction)

1.       Open Discussion and Additional Site Tour as needed.

We hope you can join this multi-trenchless focused project site tour.

Please bring the following

-PPE (personal protection equipment: Hard Hat, Safety Glasses, High-Viz Safety Vest,
-Steel Toe Safety Boots, Warm Clothing.
-Come with your Project Specific Question

1350 Colorado Blvd, Denver, CO 80206

Questions, email

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