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HomeMy WebLinkAboutBayview Bogs Phase I NOI PresentationBayview Bogs Restoration Phase 1: Invasive Plant Management 7/3/2025 | Yarmouth Conservation Commission Ecological Restoration Limited Project Notice of Intent Overview Project Site Description Regulated Resource Areas Proposed Ecological Restoration Limited Project Details Questions and Discussion Project Site Description •Applicant: Cape Cod Conservation District •Location: Bayview Road, West Yarmouth •Size: 89-acr parcel | 44-acr retired cranberry bog •Use: Retired for 25-30 years; naturalized •Topography: flat to gently sloped •Elevation: 3 to 17 feet •Abutting Land: Predominantly residential, businesses, Cape Cod Hospital Regulated Resource Areas •Coastal Bank •Salt Marsh •Land Subject to Tidal Action •Land Subject to Coastal Storm Flowage •Bordering Vegetated Wetlands •100-foot buffer •50-foot buffer •35-foot buffer •Bordering Land Subject to Flooding •200-Foot Riverfront Area *No Permanent impacts proposed Figure 3. Environmental Resource Map ER Limited Project Details: Invasive Plant Presence Common Name Scientific Name Garlic mustard Alliaria petiolata Purple loosestrife Lythrum salicaria Porcelain berry* Ampelopsis brevipedunculata Common reed Phragmites australis Japanese knotweed Fallopia japonica Japanese honeysuckle Lonicera japonica Asiatic bittersweet Celastrus orbiculatus Autumn olive Elaeagnus umbellata Buckthorn spp. Frangula spp. and Rhamnus spp. Burning bush Euonymus alatus Shrub honeysuckle Lonicera spp. Multiflora rose Rosa multiflora Gray willow Salix atrocinerea ER Limited Project Details: Management Technique •Preconstruction invasive plant management methods •Manual/Mechanical Management: Hand pulling or hand tools/small gas- powered equipment •Chemical Management: Herbicide application (foliar, cut-stem) •High-Priority Species •Phragmites •Purple loosestrife* •Japanese knotweed •Shorter (less than 4’ tall) and sparse to moderately dense woody populations •Garlic mustard •Low-Priorities: During Construction (Phase II) Management •Large woody invasives •High-density invasives with difficult access * Some populations may be more effectively managed initially through sitework during construction ER Limited Project Details: Schedule •Annual Management 2025 – 2032 •Assumed necessary through 2030 •Management as-needed through 2032 •Treatments planned based on species needs in: ‒Spring/early summer ‒Summer ‒Late summer/early fall •Monitoring 2025 – 2032 •Reporting in each management year ** Assumed management under this NOI for at least 3 years (depending on construction start schedule) * Some populations may be more effectively managed initially through sitework during construction Invasive Plant Species Management Matrix Type/Reproduction Invasive Plant Mechanical/Manual Herbicide Soil Displacement Preconstruction Recom. Non-woody and non-woody vines Fruit and seed Garlic mustard (Alliaria petiolata) Second year (flowering) growth populations: hand pull before seed development in May. First year growth (rosettes): foliar application with glyphosate in the late summer/fall Soil excavation and movement could result in the spread of seed. Seed may be widespread, and this may not be avoidable. Clean equipment before leaving area and avoid soil movement if feasible. Can be easily managed prior to construction if not widespread and scattered sparsely through project area. Purple loosestrife (Lythrum salicaria) Remove plants to the roots, allow to solarize; or Dispose of off-site or cut off flowering heads to avoid seeding – both when flowering. Foliar treatment: glyphosate or triclopyr when flowering (June–July) May be difficult to manage and construction excavation could be more cost-effective. Porcelain berry (Ampelopsis brevipedunculata) Small populations: hand-pulling prior to seed development (in August/September). Large populations: excavation possible, but likely to disperse seed. Large populations: foliar application with glyphosate prior to seed development (in August/September) If not widespread and sparsely scattered through project area, pre-treatment is preferred. Non-woody Fruit, seed, and plant/rhizome fragmentation Phragmites (Phragmites australis) Alternate cutting and herbicide application for best result in 1st and 2nd years as needed. Goal of cutting is to reduce full growth height of phragmites. Cut in June/early July. Dense stands: foliar Sparse plants: clip and drip1 Herbicide: glyphosate or imazamox Timing: late August to mid-October Avoid disturbing rhizomes – very high risk of spread due to fragmentation. Cutting above-ground material in dormancy is fine if necessary. If burying on-site, bury 10 feet (Japanese knotweed) or 15 feet (phragmites) deep. Phragmites and Japanese knotweed should be treated each year before construction to avoid spread during excavation.Japanese knotweed (Fallopia japonica) Cut by hand in the early summer in first year and foliar treat after if feasible. Foliar treatment: glyphosate If cutting isn’t feasible, treat as much of each population each year as possible (August–September) Vine (woody & non) Fruit, seed, and plant fragmentation Japanese honeysuckle (Lonicera japonica) Can be effectively reduced through mechanical (with larger equipment) activities, but as much of the root system should be removed as possible. Follow-up herbicide application will almost always be needed when taking this approach. Small/young vines: foliar Woody/mature vines: cut-stem as close to base as possible Herbicide: glyphosate or triclopyr Like with the non-woody and non-woody vines, these plants may have a large seed bank on site. Moving soil is not ideal but may not be avoidable. Clean equipment before leaving area and avoid soil movement if feasible. While possible to reduce the vast majority of biomass of these invasive plants during construction activities, there are multiple years before those activities will commence. These plants will continue to spread and grow, and it is recommended to manage those populations/individuals that are feasible to manage (due to access, budget, etc.) prior to construction. During and postconstruction herbicide application should be anticipated, especially if preconstruction herbicide application does not occur. Asiatic bittersweet (Celastrus orbiculatus) Woody Fruit and seed Autumn olive (Elaeagnus umbellata) Young individuals: foliar Mature individuals: cut-stem Mature trees: hack and squirt3 Herbicide: glyphosate or triclopyr Buckthorn spp. (Frangula & Rhamnus spp.) Burning bush (Euonymus alatus) Shrub honeysuckle (Lonicera spp.) Multiflora rose (Rosa multiflora) Woody Fruit, seed, and fragmentation Gray willow (Salix atrocinerea) Thank you for your time. Any questions? Naomi Valentine SWCA Environmental Consultants nvalentine@swca.com