Half the Mississippi River. Almost as long as the Snake River. Longer than the St. Lawrence River, the Ohio, the Green, and the White. Maybe in more relatable terms, it’s farther than a plane flight from LA to Denver. This is the scope  of the initiative being undertaken by Trout Unlimited and Orvis, who are joining forces to open up 1,000 miles of fishable habitat across the US. The 1000 Miles Project is one that is easy to rally behind. Too many fights in the environmental realm seem to succeed in making people angry but fail in channelling emotion into action. This campaign is all about action, with an identifiable target and attainable goals. The target? Culverts. As stated on the TU Blog: “Culverts–those big…