Engineers said riverfront green infrastructure (bioretention, tree trenches, rainwater harvesting and streambank stabilization) will be considered under a $3,000,000 award for design and construction; the presenter also cited a $33,000,000 green innovation award whose relationship to the $3M allocation is not explicit in the transcript.

The board approved two Green Resiliency Grant projects: a $2.5M detention-pond project in Hastings-on-Hudson to capture about 640,000 gallons and reduce flooding for nearby neighborhoods, and an Ogdensburg downtown stormwater project that will install bioretention and tree pits to treat and store roughly 300–350,000 gallons.

Presenters at a Worcester field event tied the city's 2050 green-plan ambition to a range of local green jobs—from bioretention installers to watershed monitors—emphasizing many roles do not require four-year degrees.

Worcester's stormwater coordinator walked through bioretention design at a demonstration site, saying these features filter nutrients and contaminants so plants can use them and can measurably improve local water bodies like Indian Lake.

Planning staff summarized an MS4 audit requiring more specific post‑construction standards and annual meetings, proposed BMP options (rain gardens, bioretention, permeable pavement), and said the town will amend the UDO to incorporate model standards and inspection processes.

Beginnings (formerly CFCU) asked the board to approve a reconfigured parking plan for its Meadow Street branch to reduce chronic congestion; staff highlighted daily branch volumes and proposed bioretention and screening. Board members praised stormwater and buffering but debated whether more front‑yard parking is appropriate for the mixed‑use corridor.

The commission granted full transparency relief for the east-facing facade of a Birch Ridge outparcel, after the applicant argued the western facade functions as the front and the east is effectively screened by tree conservation and bioretention; commissioners raised concerns about potential drive-through use making the rear function more public-facing.

Green infrastructure, particularly bioretention systems, is an effective nature-based system for enhancing nitrogen removal from stormwater. However, …

Horsley Witten presented 75% designs for the Portside Community Park (187 Upper County Road). The plan includes a central green, porous basketball court, ADA looped path, bioretention and 35 parking spaces. The board authorized applications to SNEP and the Community Biodiversity grant programs and directed the team to proceed toward bidding for a possible October funding request.

Find data and information to build low-carbon, climate-resilient housing and infrastructure across Canada. Featuring resources, interactive maps, guidance and more.

Blue-green infrastructure (BGI)—engineered, nature-based stormwater controls such as bioretention cells and green roofs—can reduce combined sewer overflows (CSOs). However, hydrological performance can decline over time through sediment deposition and clogging. Despite this, catchment-scale studies commonly assume stationary BGI performance, potentially underestimating CSO volumes and associated risks. This study integrates spatial sensitivity analysis with dynamic deterioration modelling to examine where and when BGI performance loss most affects CSO volumes. A semi-Markov chain model simulated condition-state transitions for individual BGI assets, coupled with EPA SWMM to assess CSO mitigation over time in a realistic case study. Under the modelled parameters, the difference in system-level CSO volume between fully functioning and fully failing BGI reached 18% by the end of the study period. Critically, while most assets exert minimal influence, a subset of high-leverage BGI assets disproportionately governs CSO volumes—primarily determined by asset size and capture ratio. Furthermore, early performance losses are masked by annual rainfall variability, introducing significant delays before failures become detectable through CSO measurements alone. These findings indicate that effective monitoring requires asset-level rather than system-level observation. Targeting a high-leverage subset of BGI can substantially reduce monitoring effort while preserving CSO performance. This study demonstrates how such critical assets can be identified and contributes a methodology for explicitly incorporating BGI deterioration dynamics into catchment-scale models. These findings enable risk-informed monitoring and maintenance prioritisation, treating BGI as a dynamic rather than static component of urban drainage management.