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Newport News Interim Local Resilience Plan
Sea Level Rise Ordinance Integration Technical Memorandum
CFPF Resilience Plan Element Document’s Relationship to CFPF Resilience Plan Element
9 Best Science & Mapping This report uses the best available science and incorporates climate change and sea level rise.
The Sea Level Rise Ordinance Integration Technical Memorandum provides specific language recommendations to incorporate climate change and sea level rise
considerations into local ordinances (Table 1: Recommended updates to the Newport News Code of Ordinances). These proposed language changes meet new
sea-level rise requirements in Virginia state laws. These changes in City ordinances will enhance and create strategies, programs, and policies that address future
flooding conditions and protect new and existing developments from sea level rise.
Stormwater Modeling Technical Memorandum
CFPF Resilience Plan Element Document’s Relationship to CFPF Resilience Plan Element
3 Social Equity Stormwater modeling needs were partially based on the social vulnerability of populations within a watershed (Figure 3:
Newport News Social Vulnerability Risk Index).
4 Flooding / Repetitive Loss Stormwater modeling needs were partially based on areas with a history of flooding and repetitive loss.
9 Best Science & Mapping Stormwater modeling needs were partially based on future watershed characteristics, which incorporate the effects of
climate change and sea level rise.
The Stormwater Modeling Technical Memorandum analyzes the City's current stormwater inventory (Table 2: Evaluation of Current Stormwater Model Inventory)
and identifies and prioritizes watersheds where more detailed stormwater modeling is needed (Table 3: Evaluation of Future Stormwater Modeling Needs). The
watersheds identified were prioritized based on current watershed characteristics, including current flooding conditions and stormwater infrastructure, projected
future watershed characteristics, which factored in planned drainage improvement projects and future population and development, and social vulnerability.
Studies and modeling of the areas recommended in this memorandum will allow the City to understand better the current state of the City's stormwater system
and to better prepare for the future.
Stream Assessment Technical Memorandum
CFPF Resilience Plan Element Document’s Relationship to CFPF Resilience Plan Element
1 Project Based This memorandum identifies and prioritizes specific stream restoration projects.
2 Nature Based Restoration projects that incorporate nature-based techniques and infrastructure are prioritized.
The Stream Assessment Technical Memorandum identifies eroding streams and sediment sources that are candidates for restoration projects to reduce the
amount of sediment in the City's waterways (Figure 4/Table 8: Sites Selected for Inclusion in the SWM Masterplan). Candidates were selected using aerial
imagery and applying factors such as accessibility, utility conflicts, potential forest loss, and stream segment slope were considered, and streams were evaluated
in the field by a surveyor. The City will prioritize these projects to reduce streambank erosion and the minimize flooding along streams and neighboring properties.
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