WEINBACH AVENUE STORM SEWER

Evansville, Indiana

Lyman Henn provided complete tunnel design and construction services for this approximately 8,800-ft-long, 96-in. inside diameter reinforced concrete pipe gravity storm sewer. Field investigation programs were conducted to characterize subsurface conditions, which were found to consist of cohesive glacial and alluvial clays or non-cohesive, fine-grained sands. The tunnel was excavated using an Earth Pressure Balance tunnel boring machine (EPBM), and the annular space between the pipe and the tunnel initial support was backfilled with cellular concrete. Project deliverables included a Design Criteria Report, Geotechnical Data Report, Geotechnical Design Summary Report, plans, and specifications. Construction-related services included review of contractor submittals and a full-time construction manager and chief tunnel inspector.