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Mailing Address:  P. O. Box 2265, Granby, CO 80446-2265
Office:  97 Forrest Drive, Granby, Colorado
Tel: 970-887-3759 ∙ Cell:  307-760-2922 ∙ Cell: 307-760-6890
e-mail:  pedersenplanning@gmail.com

Project Experience

Location: Selected Sites, Island of Tutuila, American Samoa
Client: American Samoa Government, Environmental Protection Agency
Pago Pago, American Samoa  96799
Contact: Mr. Togipa Tausaga and Ms. Sheila Wiegman
Year Completed: 1999
Project Scope:

Pedersen Planning Consultants evaluated potential stormwater detention opportunities in six watersheds on the Island of Tutuila, as well as land use recommendations associated with future resource management. Investigations were made in the following watershed planning areas: Leone, Nuuuli, Tafuna, Pago Pago Bay, Vatia, and Tula where historical flooding was common, significant coral communities characterized the nearshore water environment, or other stormwater issues were evident. 

Existing and future stormwater characteristics in each of the watersheds were evaluated using TR-55 software.  Hydrographs developed from application of the software were used to determine the size and volume of potential detention ponds that could be used to reduce flood potential and downstream discharge of surface water and sediments into the nearshore waters. 

Conceptual site plans were developed for selected sites in each watershed.  Specific stormwater management issues and opportunities were identified.  Proposals included the location and type of proposed detention facilities, as well as improvements to existing stormwater management facilities such as inlet structures, storm drains, culverts, and drainage ditches.  Order-of-magnitude costs were developed for all new construction, repairs, as well as long-term operation and maintenance.

Conceptual land use plans were also prepared to facilitate discussions with traditional village leaders concerning future land uses in the four watersheds. Since communal land ownership is a significant part of the Territory, PPC developed a creative, interactive process to help influence future land use decisions by traditional leaders.  This process was carried out with ASEPA and coordinated with appropriate land management agencies of the Territory.