. Alewife Reservation & Alewife Brook master plan. Wetlands; Wetland conservation. PARKJNG AREA WJ GATE (16 CARS) SEASONAL LIGHTING, -JH TYF. 1 \ /?'/ BIORETENTION BASIN, SEE TYPICAL DETAIL. STABILIZED AGGREGATE PATH LOW BOARDWALK, W/ HANDRAILS, TYP. FIGURE 50. Concept plan for wetland restoration in the East Reservation Recommendations 1. Determine the depth of unconsoli- dated sediment in the Little River and Perch Pond and explore the feasibility of dredging to increase channel depth and flood storage capacity and intro- duce appropriate bed substrate to sus- tain invertebrate species f
. Alewife Reservation & Alewife Brook master plan. Wetlands; Wetland conservation. PARKJNG AREA WJ GATE (16 CARS) SEASONAL LIGHTING, -JH TYF. 1 \ /?'/ BIORETENTION BASIN, SEE TYPICAL DETAIL. STABILIZED AGGREGATE PATH LOW BOARDWALK, W/ HANDRAILS, TYP. FIGURE 50. Concept plan for wetland restoration in the East Reservation Recommendations 1. Determine the depth of unconsoli- dated sediment in the Little River and Perch Pond and explore the feasibility of dredging to increase channel depth and flood storage capacity and intro- duce appropriate bed substrate to sus- tain invertebrate species fed on by fish (long-term recommendation). 2. Stabilize eroding stream banks with native vegetation using bioengineer- ing techniques such as live stakes and brush layers. Establishing herbaceous communities at the water's edge using pre-vegetated systems should also be incorporated to diversify the habitat structure and improve water quality. 3. Restore wedands on the former ADL parking lot, including open water, marsh, and an upland island (see Fig- ure 50). Connect the restored wetlands to the existing wetlands (forested wet- land, wet meadow) to the North and the East, and enhance the disturbed portions of the existing wedands by removing invasive species (, com- mon reed, Japanese knotweed, Tree- of-Heaven) and planting native vegeta- tion. Improve the riparian habitat on the stream banks and in the floodplain areas (see Appendix B for appropri- ate species). In addition to significant habitat improvements, this new marsh will improve water quality and provide additional flood storage. Expand the drainage ditches that con- nect the ADL wedand with the Litde River to provide a larger open water area that can be used by a variety of 36 FINDINGS AND RECOMMENDATIONS ALEWIFE MASTER PLAN. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectl
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