D.C. Water proposes 100-year green bonds to pay for tunnels

The D.C. Water and Sewer Authority has proposed taxable, fixed-rate Green Century Bonds, so named because of their 100-year maturity. The bonds will be used to finance a portion of the D.C. Clean Rivers Project, a $2.6 billion project to construct tunnels to transport combined sewer overflows to D.C. Water’s Blue Plains treatment plant.

The utility plans to offer $300 million in bonds on or around July 14 with a final maturity date of Oct. 1, 2114. Goldman Sachs & Co. and Barclays have been named as underwriters. The bonds are rated Aa2 by Moody’s Investors Service, AA+ by Standard & Poor’s and AA by Fitch Ratings. The interest payments on the bond issue will be subject to federal income tax but exempt from District taxation.

For information, go to www.dcwater.com.

Gray appoints interim Human Services director

Mayor Vincent C. Gray (D) recently appointed Deborah Carroll as the interim director for the D.C. Department of Human Services.

Carroll has served as the administrator for the DHS Economic Security Administration for the past five years. She has a BS degree in therapeutic recreation from Temple University and a JD degree from Temple University Law School. She succeeds David Berns, who retired June 28.

As an administrator at Human Services, Carroll supervised the overhaul of the service delivery framework for the Temporary Assistance for Needy Families program.

For information, go to dhs.dc.gov.

King Library redesign is subject of online chat

The D.C. Public Library will have a one-hour online chat exploring the renovation and design of the Martin Luther King Jr. Memorial Library at noon Thursday. Panelists include Francine Houben of the Dutch architecture firm Mecanoo, and Tom Johnson of Martinez and Johnson Architecture. Washington Post art and architecture critic Philip Kennicott will serve as moderator.

The first 30 minutes will be a conversation among Kennicott, Houben and Johnson. They will take audience questions during the second half of the chat. To submit questions in advance, e-mail mlkfuture@dc.gov.

Casey Trees seeks volunteers for study of tree monitoring

Casey Trees, a D.C.-based nonprofit urban forestry group, is seeking volunteers to monitor the collection of local tree data as part of a national study to standardize urban forest monitoring. Although several groups in different cities monitor tree data, none of their efforts have ever been fully coordinated.

The study will collect and compare standardized data — mostly collected by volunteers — related to tree mortality, growth, longevity and health. The field data will help assess the success of planting campaigns locally and nationwide. Casey Trees is conducting the study in conjunction with the Urban Tree Growth and Longevity Working Group, a national partnership of scientists.

A training class will be held from 6 to 9 p.m. next Thursday at Casey Trees, 3030 12th St. NE. On July 19 from 9 to 11 a.m., participants will measure 100 trees near Eastern Market and later will record the data at a time and date of their choosing.

To register, visit www.caseytrees.org or call 202-349-1907.

D.C. Library employee to serve on presidential committee

Ricardo Thornton, a D.C. Public Library employee, has been appointed by President Obama to the President’s Committee for People with Intellectual Disabilities.

Thornton has worked at the DC Public Library since 1978. He belongs to Project ACTION!, a coalition of adults with disabilities and the D.C. Developmental Disabilities Council, is an international ambassador with the Special Olympics and acts with the theater group Players Unlimited. Thornton and his wife Donna were the subjects of “Profoundly Normal,” a 2003 Lifetime channel movie.

Established in 1966 by President Lyndon B. Johnson, the committee advises on topics that impact people with intellectual disabilities and is made up of 34 members, including 19 citizen members and thirteen federal members. Citizen members serve for two years.

— Compiled by Terence McArdle