WATERVILLE — Not a penny of the $100 million Colby College plans to spend on programs and capital improvements, including a new sports complex and performing arts venue, will have to come out of its endowment. Interest rates are so low the school plans to issue bonds to supplement private donations for its biggest strategic initiative in more than a decade, following the lead of other schools across the country taking advantage of low interest rates to borrow for projects and to refinance debt. Colby President David A.