I-70 Guidelines for Enhancing Wildlife Permeability
The link address is: http://www.coloradodot.info/projects/i70twintunnels/plt-technical-team/issued-task-forces/wildlifeitf/I-70%20Guidelines%20for%20Enhancing%20Wildlife%20Permeability.pdf
The link address is: http://www.coloradodot.info/projects/i70twintunnels/plt-technical-team/issued-task-forces/wildlifeitf/I-70%20Guidelines%20for%20Enhancing%20Wildlife%20Permeability.pdf