The Republic of Palau’s Bureau of Public Works desired to make important decisions concerning required facility repairs, replacement, and other operational issues associated with 41 pump stations that are associated with its Koror wastewater system.  American Samoa Power Authority was retained by the ROP Bureau of Public Works to make an evaluation of the 41 sewer pump stations in its Koror system.  Pedersen Planning Consultants (PPC) was one of five consultants that comprised the ASPA project team. 

Pedersen Planning Consultants was responsible for the forecast of future wastewater flows for 41 pump station service areas in Koror State.  To accomplish this, PPC initially developed a geographical information system (GIS) for the Koror wastewater system using ArcView GIS software .  The GIS generally included spatial layers for gravity sewer and force mains, manholes, service area boundaries, and other relevant geographical information. 

PPC conducted a field survey of each service area to document the type and location of existing land uses, and to evaluate the availability of lands for future land use expansion.  Water meter records were also examined and used to calculate actual water consumption for various types of land use.

Selected national and community leaders were interviewed in Koror State to gain community insights of future economic development, land use, and infrastructure development trends.  From these discussions, planned private and public investments were identified for each service area.  These evaluations analyzed trends associated with the international fishing fleet, garment manufacturing, tourism, retail trade, and other economic sectors of the regional economy.

Demographic characteristics within Koror State were also examined to evaluate and forecast anticipated natural growth rates, migration, average household size and other relevant factors influencing the future growth of the resident population.  Information gained from the economic and demographic analyses was used to forecast anticipated land use expansion to 2014 and related wastewater generation rates for various types of land uses within each pump station service area.  A related statistical model was developed by PPC to calculate anticipated wastewater flows for the 2004-2014 period using assumptions concerning anticipated land use and wastewater generation.