Simsbury

Project Team

Date: Fall 2023
UConn Students: Lily Adamo, Emily Duzy
UConn CLEAR: David Dickson, Michael Dietz, Alec Janis


The Runoff Reduction Report

This report includes recommendations for green stormwater infrastructure practices at 6 sites in the town of Simsbury. Each site is displayed with a design of the recommended practice, detailed description of our recommendations, and an informational table. Each table shows an estimated drainage area, our recommended green infrastructure, annual gallons of runoff treated, nitrogen and phosphorus pollution reduction amounts, and the suggested size of each practice. These estimations were calculated based on the drainage area, annual rainfall estimates specific to Connecticut, and literature export values.


GSI Summary Table

The following calculations display the potential pollutant-reducing benefits if the practices identified within the report were implemented:

 

Site Location GSI Suggestion Drainage Area (sq. ft.) Annual Gallons Treated Annual Nitrogen Reduction (lb. N/yr) Annual Phosphorous Reduction (lb. P/yr) Suggested Practice Size [6 in depth] (sq. ft.)
1 Simsbury High School Bioswale 1 29,011 763,950 6.35 0.81 5,758
Bioswale 2 62,726 1,877,013 13.72 1.74 16,309 (5 in depth)
2 Town Hall Rain Garden 1 2,309 60,795 0.51 0.06 500
Rain Garden 2 4,400 115,854 0.96 0.12 953
Rain Garden 3 4,661 122,737 1.02 0.13 1,010
3 Simsbury Farms Recreation Rain Garden 1 3,006 79,157 0.66 0.08 868 (4.5 in depth)
Rain Garden 2 3,006 79,157 0.66 0.08 868 (4.5 in depth)
4 Housing Authority Rain Garden 1 1,481 39,000 0.32 0.04 321
5 Central School Rain Garden 1 697 18,354 0.15 0.02 181 (5 in depth)
Rain Garden 2 566 14,905 0.12 0.02 147 (5 in depth)
Rain Garden 3 479 12,618 0.10 0.01 208 (3 in depth)
Rain Garden 4 653 17,206 0.14 0.02 283 (3 in depth)
Rain Garden 5 610 16,059 0.13 0.02 396 (2 in depth)
6 Eno Memorial Hall Permeable Pavement 9,540 285,464 2.09 0.26 1,893

Totals

Total IC Disconnected (sq. ft.) Annual Gallons Treated Annual Nitrogen Reduction (lb. N/yr) Annual Phosphorous Reduction (lb. P/yr)
Total 124,625 3,277,719 27.25 3.44