• Ecosystem Factors
    • Changes in flow and hydrology related to drainage from agricultural lands and impervious surfaces
    • Changes in channel form and function, which result in an instability and disequilibrium that affect diversity and quality of habitat
    • Thermal impacts
    • Excess nutrients in-stream (from agricultural and stormwater runoff and nutrient-rich groundwater)
    • Excess sediment in-stream (from legacy sediment, unstable stream banks and runoff)
    • Limited organic (and nutrient) processing in-stream
    • Poor wastewater infrastructure
    • Presence of endocrine disrupting chemicals
    • Toxicity of effluent generated by resource extraction (e.g., acid mine drainage, fracking)
    • Road de-icing practices (e.g., applications of salt)
    • Loss of riparian forest buffers and the benefits provided by shading
    • Presence of invasive species
  • Policy and Administrative Factors
    • Common watershed, stressor and stream assessment and restoration guidelines
    • Review and approval of stream restoration projects
    • Cooperative Extension infrastructure that provides adequate technical assistance and knowledge-sharing
    • Financial resources that provide adequate support to local implementation efforts
    • In urban areas, land available for retrofitted and new upland best management practices (BMPs)
    • Integration of water quality and living resource goals
  • Scientific Knowledge and Application of Research
    • Stressor identification and prioritization
    • Metrics that correlate with priority stressors
    • Research to guide the selection of achievable reference conditions and design approaches
    • Monitoring that evaluates the functional lift(s) or improvement(s) that could result from best management practice implementation
    • Lag times that could affect our ability to evaluate the effects of BMPs on stream health
    • Time frame for recognizing new BMPs or adjusting BMP credits
    • Research to refine nutrient credits
    • Identification of nutrient hotspots in stream valleys where soils and other erodible geologic materials contain excess nutrients
    • Data to develop a Chesapeake Bay-wide fish-based indicator to complement the Chesapeake Bay-wide Index of Biotic Integrity (Chessie BIBI)
    • Limitations of the applicability of the Chessie BIBI and other ecological data to streams on which restoration work is being conducted annually