Environmental Protection Agency (EPA)
The EPA states that TDA is a "viable" and "useful" alternative for some engineering applications, including some of the engineered designs that use ASTM 6270-B TDA (sometimes called shredded tires or recycled tire derived aggregate), and recognizes that TDA has sustainable and valuable engineering properties, and is usually a substantial cost-saving option for these projects. See EPA's statement.
Minnesota Pollution Control (MPCA)
Civil engineering projects were recognized by the Minnesota Pollution Control Agency as a sustainable aggregate replacement. In fact, the MPCA has developed rules to include a Standing Beneficial Use of tire aggregate in roadways and any engineered aggregate replacement project.
A Standing Beneficial Use determination means that the generator or end user of a material can do so in accordance with these subparts without contacting the agency. Under Minn. R. 7035.2860, Subp. 4., no permit is needed for TDA when:
G. used as a lightweight fill in the construction of public roads in accordance with Minnesota Statutes, section 115A.912. Subd. T.
H. used as a substitute for conventional aggregate in construction applications when the ratio of the substitution is no greater than 1:1 by volume.
Minnesota Department of Transportation (MnDOT)
MnDOT has used TDA for Light Weight Fill projects (Highway 35, Pine City); Slope Stabilization Projects (Highway 8, Taylors Falls) and Frost Heaving Prevention Projects (Carlton County). The DOT has also sponsored research reports on TDA use.