This excerpt taken from the DYN 10-K filed Feb 28, 2008.
We have included descriptions of the location and general character of our principal physical operating properties by segment in Item 1. Business for further discussion, which is incorporated herein by reference. Substantially all of our assets, including the power generation facilities we own, are pledged as collateral to secure the repayment of, and our other obligations under, the Fifth Amended and Restated Credit Facility. Please read Note 15Debt for further discussion.
Our principal executive office located in Houston, Texas is held under a lease that expires in December 2017. We also lease additional offices or warehouses in the states of California, Colorado, Illinois, Indiana, New York and Texas.