Arkansas Valley Conduit

Pueblo Area Recreation
ERO is evaluating impacts on natural and cultural resources, as well as potential impacts on reservoir and stream recreation for the alternative actions for construction of a new water supply pipeline from Pueblo Reservoir to Lamar.  This feature of the Fryingpan-Arkansas Project will supply water to 40 municipalities and water districts.  ERO’s GIS specialists digitized and assessed potential impacts on cultural resources, recreation, vegetation, wetlands, and wildlife resources for five potential pipeline alignments.

Pike San Isabel National Forest Hazardous Fuels Mitigation

Slope and Survey Classification
The Pike National Forest contracted ERO to complete two intensive cultural resource surveys from 2010 to 2012 for the forest’s hazardous fuels program.  Our GIS specialists used Spatial Analyst to generate slope profiles used in the development of a survey strategy plan for 21,937 acres across five counties in central Colorado.  Most of the nearly 200 documented cultural resource sites are historic and are related to mineral exploration, recreation associated with Pikes Peak, federal work programs, and early transportation. 

Chatfield Reallocation EIS

Illustration of Net Gain in EFUs

In support of NEPA and Corps of Engineers Civil Works requirements, ERO is assisting project proponents and regulators with developing a unique ecological functions-based approach (EFU) to impact assessment and mitigation for impacts on wetlands, Preble's meadow jumping mouse (including designated critical habitat), and birds for the proposed increase in the maximum pool elevation of Chatfield Reservoir. Project issues include demonstrating that adequate mitigation is available and developing an adaptive management plan for the 50-year life of the project.

Xcel Rifle to Parachute, CO Transmission Line

Viewshed Analyses

ERO is conducting natural and cultural resource surveys for Xcel Energy’s new 18-mile 230kV transmission line, as well as preparing the environmental assessment on behalf of the Bureau of Land Management for NEPA compliance.  For one component of this project, our GIS specialists conducted viewshed analyses for proposed new transmission line alignments in Garfield County to assess the visibility of the proposed towers from various locations along select transportation corridors, including Interstate 70.

Functional Assessment of Colorado Wetlands (FACWet) Method

FACWet Example

The Functional Assessment of Colorado Wetlands (FACWet) Method was developed to more accurately assess wetland functioning for the purposes of identifying appropriate compensatory mitigation for unavoidable wetland impacts in compliance with Section 404 (b)(1) of the Clean Water Act. ERO staff use FACWet to more efficiently identify wetland function and determine what effect certain ecological stressors have on eight fundamental variables that promote functioning wetlands. ERO uses GIS as a support tool for making FACWet evaluations more efficient and accurate. This assessment can assist clients in determining where restoration or enhancement at a site could occur and can also determine the appropriate level of mitigation for wetland impacts. Click here for more information on FACWet.