Save Our Trail recently published a letter which begins to document the environmental barriers to adding High Transit Capacity (HCT) to the corridor. The grassroots group Save Our Trail is dedicated to helping the Puget Sound region preserve and creating a world-class trail along the Eastside Corridor. If you haven't already, please sign their petition: "Sound Transit Board: Vote for Buses on 405, Not for Buses or Rail on the Kirkland Trail".
Other inventories of wetland vegetation and wildlife which may be impacted by the addition of HCT to the Eastside Rail Corridor and the Cross Kirkland Corridor can be found on the Kirkland's website here, here and here. The actual reports are provided below.
ERC Advisory Council