It's Big. Period. The upstream portion of Humble Howard is being redirected to the MTI (Mid-Toronto Interceptor), which leaves the downstream portion virtually untouched unless a HUGE rainfall occurs. Three large overflow/storage tanks are located just downstream of where we entered. Roughly 20'x80' in size. On one side, overflow windows and a slide lead to the glorious brick drain itself. Side pipes downstream lead to other discoveries not yet fully explored, and a partially blocked end leads to a near dry pipe that connects to the infall at High Park South
, and ends up slowly flooding as it flows under Lakeshore Rd, eventually being redirected (we believe) to the WBST.
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