Overall Rating Gold
Overall Score 83.20
Liaison Mina Amundsen
Submission Date Nov. 5, 2018
Executive Letter Download

STARS v2.1

Colby College
OP-23: Rainwater Management

Status Score Responsible Party
Complete 2.00 / 2.00 Dale DeBlois
Environmental Program Manager
Physical Plant Department
"---" indicates that no data was submitted for this field

Which of the following best describes the institution’s approach to rainwater management?:
Comprehensive policies, plans or guidelines that require LID practices for all new projects

A brief description of the institution’s green infrastructure and LID practices:

Colby has a network of 6 multi-level stormwater ponds that service different regions of campus. These networks collect runoff in swales, where pollutants are able to fall out. When the water gets high enough, the filtered water overflows into the next level for further filtration, or overflow onto a level spreader. Lip spreaders and z-shape flow passages are present to slow the flow of water and reduce erosion. All the stormwater ponds are designed to accommodate 25 year flooding, and future campus development. Stormwater ponds are inspected two times per year, typically in the spring after heavy rains and in the fall before winter sets in. Sediments and contaminants are removed as needed. Diligent records are kept of each year's inspection criteria and results. The stormwater management system treats all stormwater from the existing campus and construction before it reaches the Arboretum, which is a conservation area.


A copy of the institution’s rainwater management policy, plan, and/or guidelines:
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A brief description of the institution’s rainwater management policy, plan, and/or guidelines that supports the responses above:

Our Low Impact Development practices also apply to ongoing campus operations. In addition to our eight storm water runoff locations as described above, we have vegetated swales, stone swales, and planting barries to manage stormwater runoff around Johnson Pond.


The website URL where information about the programs or initiatives is available:
Additional documentation to support the submission:
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