BarChip Macro Synthetic Fibre Reinforced Tunnel Segments - Blacksnake Creek CSO Tunnel

In an American First, The Blacksnake Creek Stormwater Separation Tunnel uses 100% Macro Synthetic Fibre Reinforced Tunnel Segments.
BarChip macro synthetic fibre was chosen as the sole reinforcement for the segments. While this application is a first of its type in North America, BarChip had been used previously in major USA tunnelling projects such as the Caldecott 4th Bore, Devils Slide and Euclid Creek CSO starter and exit tunnels.
There were no objections to the use of BarChip fibre reinforcement which met the performance specifications, specifically, a minimum compressive strength of 41.4 MPa (6,000 psi), minimum flexural tensile strength at 28 days of 4.62 MPa (670 psi), and minimum residual flexural tensile strength of 3.17 MPa (460 psi).