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Tuesday, March 17, 2015

From the Rearview Mirror: Green Dirt

Blog-2015-0317-rearview With hundreds of blog posts in our archives, we understand if you haven’t had a chance to read them all.

However, there’s a lot of interesting content in those early posts and we don’t want you to miss out. That’s why we’re looking back and highlighting some of our favorites in a new series called, “From the Rearview Mirror.”


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We like dirt, here on the ADOT Blog and we’ve written a lot about it over the years. From testing it, to moving it and everything in between, dirt has been an outstanding topic. Originally published on March 16, 2012, this post talks about why ADOT sometimes “paints” dirt green…

Green dirt has nothing to do with St. Patrick's Day

Blog-2015-0317-Green This dirt isn't green for St. Patrick's Day, but there is a good reason for its hue! We won’t blame you if you see this green slope at the Loop 303 and US 60 (Grand Avenue) and think it's part of a St. Patrick’s Day stunt, but we promise this is no gimmick!

The mound of dirt is green for good reason, albeit one that has nothing to do with the holiday…

ADOT crews just seeded it with a wonderful mix of desert flowers and groundcover plant material.

The seed mixture is actually sprayed on and has an all-natural green dye in it. This dye helps whoever is doing the spraying make sure they get full coverage. In time, the dye will fade, so the slope won’t be green forever!

If we get some nice spring rains, we should see things blooming and growing on the slope in about 45 days.

About now, you might be wondering what this dirt mound is doing ... just sitting there. Maybe you're also asking why ADOT goes to the trouble of seeding slopes like this one.

Well, as part of the Loop 303 Improvement Project, crews had to excavate and haul about 150,000 cubic yards of dirt away from the roadway alignment south of US 60 so bridges could be built at Waddell and Cactus roads.

They hauled the dirt to this location just for the time being.

In the future when it comes time to build the interim traffic interchange at US 60 and Loop 303, this dirt will be used during construction.

But by seeding it now ADOT is able to control dust. The vegetation that grows will cover the soil and prevent dust (landform graphics work in a similar manner). Seeding also helps prevent erosion.

So, even though there’s no St. Patrick’s Day connection, we’ll take this chance to wish you a little luck of the Irish anyway!
Posted by Angela DeWelles   |  Labels:  Dirt, From-the-Rearview


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Pursuant to Title VI of the Civil Rights Act of 1964, and the Americans with Disabilities Act (ADA), ADOT does not discriminate on the basis of race, color, national origin, age, sex or disability. Persons that require a reasonable accommodation based on language or disability should contact ADOT’s Civil Rights Office at civilrightsoffice@azdot.gov. Requests should be made as early as possible to ensure the State has an opportunity to address the accommodation.

De acuerdo con el título VI de la Ley de Derechos Civiles de 1964 y la Ley de Estadounidenses con Discapacidades (ADA por sus siglas en inglés), el Departamento de Transporte de Arizona (ADOT por sus siglas en inglés) no discrimina por raza, color, nacionalidad, edad, género o discapacidad.  Personas que requieren asistencia (dentro de lo razonable) ya sea por el idioma o por discapacidad deben ponerse en contacto con la Oficina de Derechos Civiles en civilrightsoffice@azdot.gov. Las solicitudes deben hacerse lo más pronto posible para asegurar que el equipo encargado del proyecto tenga la oportunidad de hacer los arreglos necesarios.