I-25 and Arapahoe EA and FONSI
August 2012 - This Environmental Assessment (EA) was prepared under requirements of the National Environmental Policy Act (NEPA) to determine if the Action Alternative could have significant impacts on the human environment. The purpose of the project was to reduce congestion and improve traffic operations and safety for the traveling public within the I-25 and Arapahoe Road interchange complex.
Environmental Assessment August 2012
Environmental Resource Technical Memoranda July 2012
Traffic Noise & Vibration Impact Assessment Tech Report April 2012
Air Quality Evaluation March 2012
Biological Resources Tech Memo July 2012
Hazardous Materials Assessment May 2012
Historic Resource Evaluation Tech Memo April 2012
Visual Resources Tech Memo April 2012
Technical Design Documentation July 2012
Existing Conditions Tech Memo November 2011
Structure Selection Report November 2011
Arapahoe Road Pedestrian Grade Separation Evaluation February 2012
Design and Utilities Tech Memo November 2011
Drainage Tech Memo/Water Quality and Detention Storage Analysis February 2012
Construction Phasing Tech Memo November 2011
Improved Partial Cloverleaf Cost Estimate April 2012
Eagle Hardware/Gart Highway Access Appeal Court Decision February 1997
Final Travel Forecasting Summary May 2012
Final Interchange & Supplemental I-25 Crossing Alternatives Tech Report August 2011
Final Safety Assessment Summary August 2011
Walnut Hills Neighborhood Traffic Study July 2011
EA Newsletter #1 April 2010
EA Newsletter #2 September 2011
EA Newsletter #3 September 2012
February 2013 - This Finding of No Significant Impact (FONSI) was prepared under requirements of the National Environmental Policy Act (NEPA). Preparation of this FONSI was a cooperative effort by the Federal Highway Administration (FHWA) and the Colorado Department of Transportation (CDOT) as joint lead agencies; Arapahoe County as project sponsor; and City of Centennial and City of Greenwood Village as cooperating agencies.
Finding of No Significant Impact FONSI February 2013
Also included:
Final System Level Feasibility Study June 2008
