Rocky Hill

Project Team

Date: Fall 2023
UConn Students: Cindy Osorio, David Shaffer
UConn CLEAR: David Dickson, Michael Dietz, Alec Janis


The Runoff Reduction Report

This report includes recommendations for green stormwater infrastructure practices at 5 sites in the town of Rocky Hill. 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  (sq. ft.)
1 Cora J. Belden Library Rain Garden 2,200 47,933 0.48 0.06 275 (10 in depth)
Rain Garden 2 8,350 219,882 1.83 0.23 1,400 (8 in depth)
Rain Garden 3 2,400 63,199 0.52 0.07 260 (10 in depth)
2 Senior Center Rain Garden 2,700 63,199 0.59 0.07 400 (9 in depth)
3 West Hill Elementary School Rain Garden 26,700 703,094 5.84 0.74 3,800 (9 in depth)
4 Rocky Hill High School Rain Garden 30,000 789,994 6.56 0.83 4,050 (10 in depth)
5 Rocky Hill Middle School Rain Garden 1 6,700 176,432 1.47 0.19 900 (9 in depth)
Rain Garden 2 14,500 380,514 3.17 0.40 1950 (10 in depth)
Rain Garden 3 4,350 114,549 0.95 0.12 700 (8 in depth)

Totals

Total IC Disconnected (sq. ft.) Annual Gallons Treated Annual Nitrogen Reduction (lb. N/yr) Annual Phosphorous Reduction (lb. P/yr)
Total 103,700 2,568,796 23.43 3.03