Block Boundary Suggestion Project
Phase 1 of the 2020 Census Redistricting Data Program is the Block Boundary Suggestion Project (BBSP), which provides state liaisons the opportunity to submit suggestions for the 2020 Census tabulation block inventory. Phase 1 is conducted in two parts, an initial identification of the updates needed, and a verification stage to ensure the suggested updates were accurately applied.
The Census Bureau periodically adds new features and modifies their existing block boundary lines based on geography corrections and changes to landmarks and boundary lines that may no longer meet the block boundary line requirements. BBSP allows states the opportunity to review these additions and modifications, as well as suggest new block boundary lines in areas of growth or in areas that limited the creation of voting precinct and legislative district shapes in the past. In addition, Phase 1 offers the opportunity to suggest new legal boundary updates as well as updates to other geographic areas.
The Secretary's Office worked with city and town liaison's in 2016-2017 to preserve block lines as needed and helped to reduce block lines where not necessary (such as such as water blocks or traffic medians). As part of this process, we requested local assistance with the review of all block lines, and subsequent identification of block boundary lines that had to remain, including challenging any lines that the U. S. Census Bureau intended to eliminate.