Recent development and adoption of water clarity criteria and their tidal water clarity standards regulations for protection in the Shallow Water Bay Grass Designated Use (SAVgrow zone) areas of the Bay have placed a significant emphasis on the effect of sediment loads on Bay water clarity. Furthermore, previous modeling results indicated that sediment reductions from the watershed alone and nutrient reductions called for in the Tributary Strategies would not be sufficient to meet the new state water clarity-submerged aquatic vegetation (SAV) acreage water quality standards. Success in achieving the states' water clarity-SAV acreage water quality standards will require recognition of the many factors affecting water clarity and their origin within the Bay and watershed. The Chesapeake Bay Program's Sediment workgroup was assigned the task of developing sedimentsheds. The purpose of the sedimentsheds is that they would be applied to determine the source of sediment that is contributing to water clarity violations in a SAV grow zone with the intent of using these results in the 2010 sediment reallocation process. The concept is expected to be similar to that of the previous determination of the airsheds which were used to determine the spatial extent of atmospheric nutrient sources affecting critical regions of the Bay.