The Arizona Department of Transportation, the Arizona Game & Fish Department and the Arizona State Parks Board are required to conduct a study every three years on watercraft fuel consumption and recreational watercraft usage. The fuel consumption data is collected to determine the allocation of motor vehicle fuel tax to the State Lake Improvement Fund. The information on recreational watercraft usage patterns on Arizona’s lakes and rivers is necessary, in part, to determine the distribution of SLIF funds to applicants.

Study in preparation for updating the Yuma County 2010 Comprehensive Plan, analyzing: topography and climate; vegetation; soil types; prime farm land and hydrology; transportation; demographics; change in population; population change by age; commute time/previous place of residence; housing; new housing statistics; land ownership; land use designations; zoning districts; employment; and Yuma Proving Ground expansion.

Study in preparation for updating the Yuma County 2010 Comprehensive Plan, analyzing topography and climate; soil types; vegetation; prime farm land and hydrology; communities; community facilities; transportation; demographics; housing; location of residential building permits; new housing statistics; land ownership; land ownership statistics; Wellton-Mohawk Title Transfer Act; land use designations; zoning districts; employment; income; business establishments; agriculture statistics; proposed oil refinery; joint land use study; Town of Wellton; and City of Yuma annexation.

Study in preparation for updating the Yuma County 2010 Comprehensive Plan, analyzing: race and ethnicity; population by Census block map; age cohorts by percentage of population; Census block groups; language statistics; commuting and prior residency statistics; employment by sector; employment by industry; income statistics; type of housing; community facilities; State Route 195; soil and groundwater; soil type map; depth to groundwater map; airport noise zones; land use designations established in Yuma County; zoning district map; rezonings; and housing units added.

Study in preparation for updating the Yuma County 2010 Comprehensive Plan, analyzing: topography and climate; soil types; vegetation; population, race, and ethnicity; age of population; housing occupancy; owner occupancy; land ownership; Fisher's Landing lease auction; building/placement permit activity; location of added housing units; zoning districts; land use designations; rezoning Case #02-39; wildlife refuges; and Yuma Proving Ground.

Study in preparation for updating the Yuma County 2010 Comprehensive Plan, analyzing: irrigation districts; vegetation; soil; Mittry Lake State Wildlife Area; Yuma Proving Ground; population by census block, race, and ethnicity; age cohorts by percentage of population; housing statistics; land ownership; land use designation map; changes to land use designations; zoning map; rezonings; and building permits.

Study in preparation for updating the Yuma County 2010 Comprehensive Plan, analyzing: race and ethnicity; population by census block map; population change; age cohorts by percentage of population; housing statistics; vacancy statistics; census tracts; language statistics; commuting and prior residency statistics; highest level of education completed; income statistics; employment by sector; employment by occupation; type of housing; soil and groundwater; soil type map; depth to groundwater map; community facilities; Avenue B and C Colonia Improvement District; land use designation map; changes in land use designations; zoning districts established in Yuma County; zoning district map; rezonings; and housing units added.