On Edit: These are the states with "blight" laws.
"But for decades, the court has been expanding the definition of public use, allowing cities to employ eminent domain to eliminate blight.
Arkansas, Florida, Illinois, Kentucky, Maine, Montana, South Carolina and Washington already forbid the taking of private property for economic development except to eliminate blight.All of these states have laws about eminent domain except in cases of "blight". And they get to define blight. "
"Illinois state Sen. Steve Rauschenberger, a Republican who is considering a run for governor, said the state's blight laws need to be more restrictive.
"The statutory definition of blight in Illinois is broader than the Mississippi River at its mouth," he said. "They have taken everything from underdeveloped lakefront property to open green-grass farmfields as being defined as blighted."
http://www.boomantribune.com/story/2005/7/21/17420/3340Florida's definition of "blight", and if only two conditions exist, an area qualifies.
8) "Blighted area" means an area in which there are a substantial number of deteriorated, or deteriorating structures, in which conditions, as indicated by government-maintained statistics or other studies, are leading to economic distress or endanger life or property, and in which two or more of the following factors are present:
(a) Predominance of defective or inadequate street layout, parking facilities, roadways, bridges, or public transportation facilities;
(b) Aggregate assessed values of real property in the area for ad valorem tax purposes have failed to show any appreciable increase over the 5 years prior to the finding of such conditions;
(c) Faulty lot layout in relation to size, adequacy, accessibility, or usefulness;
(d) Unsanitary or unsafe conditions;
(e) Deterioration of site or other improvements;
(f) Inadequate and outdated building density patterns;
(g) Falling lease rates per square foot of office, commercial, or industrial space compared to the remainder of the county or municipality;
(h) Tax or special assessment delinquency exceeding the fair value of the land;
(i) Residential and commercial vacancy rates higher in the area than in the remainder of the county or municipality;
(j) Incidence of crime in the area higher than in the remainder of the county or municipality;
(k) Fire and emergency medical service calls to the area proportionately higher than in the remainder of the county or municipality;
(l) A greater number of violations of the Florida Building Code in the area than the number of violations recorded in the remainder of the county or municipality;
(m) Diversity of ownership or defective or unusual conditions of title which prevent the free alienability of land within the deteriorated or hazardous area; or
(n) Governmentally owned property with adverse environmental conditions caused by a public or private entity.
"However, the term "blighted area" also means any area in which at least one of the factors identified in paragraphs (a) through (n) are present and all taxing authorities subject to s. 163.387(2)(a) agree, either by interlocal agreement or agreements with the agency or by resolution, that the area is blighted. Such agreement or resolution shall only determine that the area is blighted. For purposes of qualifying for the tax credits authorized in chapter 220, "blighted area" means an area as defined in this subsection."