1. Garnet Abrams Faculty Advisor: Dr. Eileen Zerba Princeton Environmental Institute Summer 2010

2.  Nutrients – Nitrogen and Phosphorous  YSI – Temperature, pH, salinity, turbidity, dissolved O 2, chlorophyll, and blue-green algae  Primary inputs – Stony Brook and Millstone River  Smaller inputs – Elm Stream, Washington Stream, storm drain networks

3.  Dillon pool filters backwashed into Elm Stream and Lake Carnegie  Chlorine tolerance of different species  Installation of UV filtration system will reduce chlorine concentrations in backwash

4.  Construction of new chemistry and neuroscience buildings alters nutrient levels and turbidity  Urban watershed results in quick and high flood peaks. Also increases pollution stored in and on the ground that is concentrated in initial rain events

5.  Primary objective to redirect the stream from undercutting Washington Road  Secondary to build a healthier environment that will be better able to filter pollutants and recycle the high nutrients into the ecosystems instead of concentrating in Lake Carnegie  Adding meanders lengthens stream and slows current  Diversifying ecology  Altering streambed to incorporate more step-pools

6.  Current streambed is unstable in a state of transition and reconfiguring its floodplain  Upper narrow, steep, and straight run extreme focus of restoration Blue – bedrock Green – boulders Yellow – mixed large gravel and boulders Orange – mixed sand and large gravel Red Lines - Undercutting