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

STARS v2.1

Colby College
OP-6: Clean and Renewable Energy

Status Score Responsible Party
Complete 3.00 / 4.00 Sandy Beauregard
Director of Sustainability
Sustainability Office
"---" indicates that no data was submitted for this field

Total energy consumption (all sources, excluding transportation fuels), performance year :
212,912.08 MMBtu

Total clean and renewable electricity generated on site during the performance year and for which the institution retains or has retired the associated environmental attributes:
9,495.61 MMBtu

A brief description of on-site renewable electricity generating devices :

Colby installed a co-generation turbine in 1999, producing about 10 percent of Colby’s electrical demand as a by-product of generating heat and hot water for the campus. There is a geothermal heating system that provides heating to two buildings on campus. Additionally, there is a 28 kW rooftop solar array on the Alumni Center and a new 1.8 MW solar array that went live in September 2017.


Non-electric renewable energy generated on-site, performance year:
106,080.48 MMBtu

A brief description of on-site renewable non-electric energy devices:

At the time of its construction, the biomass plant replaces approximately 1 million gallons of heating fuel with about 22 thousand tons of locally sourced wood chips and forest waste annually. Now, Colby does not burn any oil and instead uses natural gas and biomass to fuel the Biomass/Cogeneration plant. The plant produces steam used for heat, hot water, cooking, and cogeneration of electricity. There is also a geothermal heating system for the Alumni Center and the Davis Science Center.


Total clean and renewable electricity generated by off-site projects that the institution catalyzed and for which the institution retains or has retired the associated environmental attributes, performance year:
0 MMBtu

A brief description of off-site, institution-catalyzed, renewable electricity generating devices:

N/A


Total third-party certified RECs, GOs and/or similar renewable energy products (including renewable electricity purchased through a utility-provided certified green power option) purchased during the performance year:
43,920.94 MMBtu

A brief description of the RECs, GOs and/or similar renewable energy products, including contract timeframes:

The College purchases Green-E Renewable Energy Credits that are 100% wind for all campus electricity needs.


The website URL where information about the programs or initiatives is available:
Additional documentation to support the submission:
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Electricity use, by source (percentage of total, 0-100):
Percentage of total electricity use (0-100)
Biomass 6
Coal 0
Geothermal 0
Hydro 0
Natural gas 2
Nuclear 0
Solar photovoltaic 10
Wind 82
Other (please specify and explain below) 0

A brief description of other sources of electricity not specified above:

Colby has a geothermal system, however it is not metered. All purchased electricity comes from wind RECs.


Energy used for heating buildings, by source::
Percentage of total energy used to heat buildings (0-100)
Biomass 74
Coal 0
Electricity 0
Fuel oil 1
Geothermal 1
Natural gas 21
Other (please specify and explain below) 3

A brief description of other sources of building heating not specified above:

Propane


Percentage of total energy consumption from clean and renewable sources:
74.91

Although the geothermal system is not metered, it services only two buildings, so we used the area of these two buildings as a percentage of total building area to estimate the total percent of geothermal energy used to heat buildings.

The information presented here is self-reported. While AASHE staff review portions of all STARS reports and institutions are welcome to seek additional forms of review, the data in STARS reports are not verified by AASHE. If you believe any of this information is erroneous or inconsistent with credit criteria, please review the process for inquiring about the information reported by an institution and complete the Data Inquiry Form.