As part of the I-94 freeway modernisation from Burns Avenue to Barrett Avenue, the I-94 Modernisation Segment 3 Package 1 Drainage Tunnel is due to provide a resilient drainage solution. With an estimated 15-24m overburden, the 1.75km-long soft ground drainage tunnel is going to have a 4.4m inner diameter. The design-build project also includes a launch shaft, retrieval shaft, two offline drop shafts, junction chamber, pump station, adit connections, and other associated work.<\/p>\n
Considering the subsurface conditions it is anticipated that a pressurised face TBM will be used.<\/p>\n
The local utility provider, DTE Energy, supplies three-phase 480V, 4.8kV, and 13.2kV services to customers in the Metro Detroit Area. MDOT wants to determine the power required for a three-phase 13.2kV primary service to provide sufficient electrical capacity to support surface works and TBM operations at the tunnel launch\/mining site and proposed onsite step-down transformer capacities and configurations, including typical redundancy and protection schemes used for TBM power distribution.<\/p>\n
In order to helping support tunnel operations and to confirm and\/or refine the utility co-ordination approach for the project, the MDOT wants to gather information to help it understand the power needs from industry, through the RFI.<\/p>\n
The deadline for responses is August 29, 2025.<\/p>\n","protected":false},"excerpt":{"rendered":"
As part of the I-94 freeway modernisation from Burns Avenue to Barrett Avenue, the I-94 Modernisation Segment 3 Package 1 Drainage Tunnel is due to provide a resilient drainage solution. With an estimated 15-24m overburden, the 1.75km-long soft ground drainage tunnel is going to have a 4.4m inner diameter. The design-build project also includes a launch shaft, retrieval shaft, two offline drop shafts, junction chamber, pump station, adit connections, and other associated work. Considering the subsurface conditions it is anticipated that a pressurised face TBM will be used. The local utility provider, DTE Energy, supplies three-phase 480V, 4.8kV, and 13.2kV […]<\/p>\n","protected":false},"author":5,"featured_media":19455,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41],"tags":[5060,5059,84,47,229],"class_list":["post-19454","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-drainage-tunnel","tag-i-94-modernisation-segment-3-package-1","tag-tbm","tag-tunneling","tag-us","post--single"],"yoast_head":"\n