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RMAT-Northampton-HousingChoice_reportRMAT Climate Resilience Design Standards Tool Project Report Northampton Housing ChoiceDate Created: 5/13/2022 3:46:29 PM Created By: wfeiden Download Project Summary Link to Project Estimated Construction Cost: $367000.00End of Life Year: 2123Project within mapped Environmental Justice neighborhood: Yes Ecosystem Benefits Scores Project Score Moderate Exposure Scores Sea Level Rise/Storm Surge Not Exposed Extreme Precipitation - Urban Flooding High Exposure Extreme Precipitation - Riverine Flooding High Exposure Extreme Heat High Exposure Asset Summary Number of Assets: 1 Asset Risk Sea Level Rise/StormSurge Extreme Precipitation- Urban Flooding Extreme Precipitation- Riverine Flooding Extreme Heat Water, sewer, driveway, sidewalk to serve affordable housing Low Risk High Risk High Risk High Risk Project Outputs Target Planning Horizon Intermediate Planning Horizon Percentile Return Period Tier Sea Level Rise/Storm Surge Water, sewer, driveway, sidewalk to serve affordable housing Extreme Precipitation Water, sewer, driveway, sidewalk to serve affordable housing 2070 25-yr (4%)Tier 2 Extreme Heat Water, sewer, driveway, sidewalk to serve affordable housing 2070 50th Tier 2 Scoring Rationale - Exposure Sea Level Rise/Storm Surge This project received a "Not Exposed" because of the following: Not located within the predicted mean high water shoreline by 2030No historic coastal flooding at project site Not located within the Massachusetts Coast Flood Risk Model (MC-FRM) Extreme Precipitation - Urban Flooding ■  ■  ■  ■  ■  Page 1 of 5 This project received a "High Exposure" because of the following: Increased impervious area Maximum annual daily rainfall exceeds 10 inches within the overall project's useful lifeNo historic flooding at project siteExisting impervious area of the project site is between 10% and 50% Extreme Precipitation - Riverine Flooding This project received a "High Exposure" because of the following: Part of the project is within a mapped FEMA floodplain, outside of the Massachusetts Coast Flood Risk Model (MC-FRM)Part of the project is within 100ft of a waterbody No historic riverine flooding at project site Project is not likely susceptible to riverine erosion Extreme Heat This project received a "High Exposure" because of the following: 30+ days increase in days over 90 deg. F within project's useful life Increased impervious area Existing trees are being removed as part of the proposed project Existing impervious area of the project site is between 10% and 50% Located within 100 ft of existing water body Scoring Rationale - Asset Risk Scoring Asset - Water, sewer, driveway, sidewalk to serve affordable housingPrimary asset criticality factors influencing risk ratings for this asset: Asset may inaccessible/inoperable for more than a day but less than a week after natural hazard event Loss/inoperability of the asset would have impacts limited to the location of infrastructure onlyThe infrastructure provides services to populations that reside within Environmental Justice neighborhoods or climate vulnerable populations.Inoperability of the asset would not be expected to result in injuries Cost to replace is less than $10 million Impact on natural resources can be mitigated naturally with the inoperability of the asset Project Design Standards Output Asset: Water, sewer, driveway, sidewalk to serve affordable housing Infrastructure Sea Level Rise/Storm Surge Low Risk Applicable Design Criteria Projected Tidal Datums: No Projected Water Surface Elevation: No Projected Wave Action Water Elevation: No Projected Wave Heights: No Projected Duration of Flooding: NoProjected Design Flood Velocity: NoProjected Scour & Erosion: No Extreme Precipitation High Risk Target Planning Horizon: 2070 Return Period: 25-yr (4%) Applicable Design Criteria Tiered Methodology: Tier 2 Projected Total Precipitation Depth & Peak Intensity for 24-hr Design Storms: Yes Asset Name RecommendedPlanning Horizon Recommended ReturnPeriod (Design Storm)Projected 24-hr TotalPrecipitation Depth (inches)Step-by-Step Methodologyfor Peak Intensity Page 2 of 5 Asset Name Recommended Planning Horizon Recommended Return Period (Design Storm) Projected 24-hr Total Precipitation Depth (inches) Step-by-Step Methodology for Peak Intensity Water, sewer, driveway, sidewalk to serve affordable housing 2070 25-Year (4%)8.5 Downloadable Methodology PDF Limitations: While precipitation depth is useful for project planning and design, rainfall distribution and peak intensity of the design storm is recommended to also be considered. Lower-intensity, longer-duration storms allow time for infiltration and reduce the load on the infrastructure system over the duration of the storm. Higher-intensity, shorter-duration storms often have higher runoff volumes because the water does not have enoughtime to infiltrate and infrastructure systems (e.g., catch basins) and may overflow or back up during such storms. In the Northeast, short -duration highintensity rain events are becoming more frequent, and there is often little early warning for these events, making it difficult to plan operationally. These events can result in the rapid inundation of the asset project location. Design should consider both short- and long-duration precipitation events and how they may impact the asset. The precipitation values provided by this Tool (version 1) are recommended to inform planning and design, but they do not guarantee that the asset will be protected from or be able to withstand an extreme precipitation event. The planning, design, and review guidance accompanying these values is general and projects are encouraged to do their own due diligence to understand the vulnerability of their asset. Projected Riverine Peak Discharge & Peak Flood Elevation: No Extreme Heat High Risk Target Planning Horizon: 2070 Percentile: 50th Percentile Applicable Design Criteria Tiered Methodology: Tier 2 Projected Annual/Summer/Winter Average Temperatures: Yes Projected Heat Index: Yes Projected Growing Degree Days: No Projected Days Per Year With Max Temp > 95°F, >90°F, <32°F: Yes Projected Number of Heat Waves Per Year & Average Heat Wave Duration: Yes Projected Cooling Degree Days & Heating Degree Days (base = 65°F): No Project Inputs Core Project Information Name:Northampton Housing Choice Given the expected useful life of the project, through what year do you estimate the project to last (i.e. before a major reconstruction/renovation)? 2123 Location of Project:Northampton Estimated Capital Cost:$367,000 Who is the Submitting Entity?City/Town Northampton Wayne Feiden(wfeiden@northamptonma.gov)Is this project identified as a priority project in the Municipal Vulnerability Preparedness (MVP) plan or the local or regional Hazard Mitigation Plan (HMP)? Yes Is this project being submitted as part of a state grant application?Yes What stage are you in your project lifecycle?Design Is climate resiliency a core objective of this project?Yes Is this project being submitted as part of the state capital planning process?NoIs this project being submitted as part of a regulatory review process or permitting?No Brief Project Description:Design and construction of infrastructure for four different affordable housing projects Project Submission Comments:Affordable housing, by definition, serves environmental justice and climate vulnerable populations. In providing infrastructure to support new housing within the urban core area, and not onbrownfields site, the project is providing more resilience benefitsthan even the most climate focused project in greenfield developments or projects serving other populations. Project Ecosystem Benefits Factors Influencing Output ✓ Project reduces storm damage ✓ Project promotes decarbonization ✓ Project recharges groundwater ✓ Project filters stormwater using green infrastructure ✓ Project protects fisheries, wildlife, and plant habitat ✓ Project provides recreation ✓ Project prevents pollution Page 3 of 5 Factors to Improve Output ✓ Incorporate nature-based solutions that may provide flood protection ✓ Protect public water supply by reducing the risk of contamination, pollution, and/or runoff of surface and groundwater sources used for human consumption ✓ Incorporate nature-based solutions that improve water quality ✓ Incorporate nature-based solutions that sequester carbon carbon ✓ Preserve, enhance, and/or restore coastal shellfish habitats ✓ Incorporate vegetation that provides pollinator habitat ✓ Identify opportunities to remediate existing sources of pollution ✓ Increase plants, trees, and/or other vegetation to provide oxygen production ✓ Mitigate atmospheric greenhouse gas concentrations and other toxic air pollutants through nature-based solutions ✓ Incorporate education and/or protect cultural resources as part of your project Is the primary purpose of this project ecological restoration? No Project Benefits Provides flood protection through nature-based solutions NoReduces storm damage Yes Recharges groundwater Yes Protects public water supply No Filters stormwater using green infrastructure Yes Improves water quality No Promotes decarbonization YesEnables carbon sequestration No Provides oxygen production No Improves air quality No Prevents pollution Yes Remediates existing sources of pollution No Protects fisheries, wildlife, and plant habitat YesProtects land containing shellfish NoProvides pollinator habitat No Provides recreation Yes Provides cultural resources/education No Project Climate Exposure Is the primary purpose of this project ecological restoration?No Does the project site have a history of coastal flooding?No Does the project site have a history of flooding during extreme precipitation events(unrelated to water/sewer damages)?No Does the project site have a history of riverine flooding?No Does the project result in a net increase in impervious area of the site?Yes Are existing trees being removed as part of the proposed project?Yes Project Assets Asset: Water, sewer, driveway, sidewalk to serve affordable housing Asset Type: Utility InfrastructureAsset Sub-Type: WastewaterConstruction Type: New Construction Construction Year: 2023 Useful Life: 100 Identify the length of time the asset can be inaccessible/inoperable without significant consequences. Infrastructure may be inaccessible/inoperable for more than a day, but less than a week after natural hazard without consequences.Identify the geographic area directly affected by permanent loss or significant inoperability of the infrastructure.Impacts limited to location of infrastructure only Identify the population directly served that would be affected by the permanent loss or significant inoperability of the infrastructure. Less than 5,000 people Identify if the infrastructure provides services to populations that reside within Environmental Justice neighborhoods or climate vulnerable populations. The infrastructure provides services to populations that reside within Environmental Justice neighborhoods or climate vulnerable populations.Will the infrastructure reduce the risk of flooding? No If the infrastructure became inoperable for longer than acceptable in Question 1, how, if at all, would it be expected to impact people's health and safety? Inoperability of the infrastructure would not be expected to result in injuries If there are hazardous materials in your infrastructure, what are the extents of impacts related to spills/releases of these materials?There are no hazardous materials in the infrastructureIf the infrastructure became inoperable for longer than acceptable in Question 1, what are the impacts on other facilities, assets, and/or infrastructure? Minor – Inoperability will not likely affect other facilities, assets, or buildings If the infrastructure was damaged beyond repair, how much would it approximately cost to replace? Less than $10 million Does the infrastructure function as an evacuation route during emergencies? This question only applies to roadway projects. No Page 4 of 5 If the infrastructure became inoperable for longer than acceptable in Question 1, what are the environmental impacts related to natural resources? Impact on natural resources can be mitigated naturally If the infrastructure became inoperable for longer than acceptable in Question 1, what are the impacts to government services (i.e. the infrastructure is not able to serve or operate its intended users or function)? Loss of infrastructure may reduce the ability to maintain some government services, while a majority of services will still exist What are the impacts to loss of confidence in government resulting from loss of infrastructure functionality (i.e. the infrastructure asset is not able toserve or operate its intended users or function)?Reduced morale and public support Report Comments Affordable housing, by definition, serves environmental justice and climate vulnerable populations. In providing infrastructure to support new housing within the urban core area, and not on brownfields site, the project is providing more resilience benefits than even the most climate focused project in greenfield developments or projects serving other populations. Page 5 of 5