City of Durango -Wastewater Treatment Plant Environmental Assessment

Improvements at the City of Durango Wastewater Treatment Plant
ERO prepared an environmental assessment for upgrades to the existing City of Durango Wastewater Treatment Plant located on the Animas River in La Plata County, Colorado. Working with the CDPHE, ERO addressed several environmental issues for the project, including:
• Public scoping and outreach
• Section 7 compliance-Endangered Species Act
• Development of facilities within the 100-year floodplain
• Concerns on water quality voiced by the Southern Ute Indian Tribe
• Emergency preparedness in the event of a flood or sewer overflow event
• Summarizing the City’s public outreach and evaluation of alternative sites for the plant
• Section 106 compliance-National Historic Preservation Act

Management Plan for Developed Water Sources

California’s Mojave National Preserve is a desert environment with a long history of human development of water sources to support mining, ranching, and wildlife. The management of these developed water sources has presented a dilemma for the National Park Service (NPS) as most are located within designated wilderness and raise questions about human intervention in native ecological processes. ERO has worked closely with the interdisciplinary NPS planning team to understand the issues and trade-offs, develop alternative management strategies, and analyze the impacts and benefits of different strategies on wildlife, cultural resources, and wilderness character. These efforts culminated in a plan to improve the management and placement of developed water sources, while supporting native species conservation and reducing the number of water developments in wilderness.

Southern Delivery System EIS, El Paso and Pueblo Counties, Colorado

Wetlands Delineation for SDS
ERO assisted the Bureau of Reclamation with an Environmental Impact Statement for the proposed Southern Delivery System (SDS) Project, a water supply project for Colorado Springs, Fountain, and Security. The study area covered nearly 25,000 acres and consisted of about 40 miles of water conveyance pipeline routes and multiple proposed and alternative reservoir sites. ERO was responsible for data collection and impact assessment of vegetation, wildlife, threatened and endangered species, visual resources, recreation, hazardous materials, and geology.  ERO assessed all wetlands in the study area and produced detailed wetland maps for analysis. The final EIS was completed in 2009.

Colorado Springs Utilities On-Call Environmental Services, El Paso and Pueblo Counties, Colorado

Migratory Bird Surveys along Utility Corridor
Since 2008, ERO has provided on‐call vegetation and natural resource services to Colorado Springs Utilities for a variety of infrastructure projects, including construction of a 96-inch raw water pipeline for the Southern Delivery System. Services include preparing habitat assessments, biological surveys, resource mapping, and wetlands design/oversight for electricity generation and transmission, water supply and distribution systems, sanitation systems, and stormwater control. ERO has worked closely with Utilities to conduct pre‐ and post‐construction assessments and develop avoidance, minimization, and mitigation recommendations for water pipeline and electrical transmission line construction, sewer line repairs and solar array construction. Specifically, these services include compliance with the Endangered Species Act, Migratory Bird Treaty Act, Bald and Golden Eagle Protection Act, and Section 106 of the National Historic Preservation Act.

Windy Gap Firming Project

View of Windy Gap Reservoir
ERO prepared an environmental impact statement for a new water supply reservoir and transbasin diversion from the Colorado River to the East Slope of Colorado.

Southeastern Colorado Water Conservancy District Boundary True‐Up

When the City of Colorado Springs became aware of discrepancies between its boundaries and the Southeastern Colorado Water Conservation District boundaries, they retained ERO to implement a boundary “true‐up.” ERO conducted an initial environmental review of the parcels to be included in the District. Where data gaps existed, ERO conducted field surveys of the parcels and gathered information to assist in preparing NEPA documentation for each parcel. ERO also performed a Class I file search and pedestrian survey of cultural and historic resources, and is currently initiating a treatment plan for the eligible cultural resources identified.

Northern Integrated Supply Project

Glade Reservoir Site

ERO is a third-party contractor working under the direction of the U.S. Army Corps of Engineers for preparation of an environmental impact statement for a project that would provide a new water supply to 15 participants in northeastern Colorado. The Final EIS is expected to be finalized in early 2018.

Water and Wastewater Treatment Facility Upgrades

Wetlands near planned Olathe wastewater treatment plant

ERO has assisted several communities with preparation of environmental assessments and environmental reports required by the Colorado Department of Public Health and Environment and/or United States Department of Agriculture-Rural Development for improvements to drinking water and wastewater facilities.  Recent projects include a new lagoon and sewer line for the Town of Olathe and a pump station and pipeline for the Parkville Water District, which delivers drinking water to Leadville, Colorado.

Eastern New Mexico Regional Water Supply Project

Ute Reservoir
To provide municipal and industrial water to eight New Mexico communities, ERO prepared an environmental assessment for delivery of water from Ute Reservoir. Project facilities included an intake structure, a water treatment plant, more than 150 miles of water conveyance pipelines, and other related facilities.

Arkansas Valley Conduit

Arkansas River

ERO assisted the Bureau of Reclamation with preparation of an environmental impact statement for a component of the Fryingpan-Arkansas Project that involves more than 200 miles of new pipeline and a new water treatment plant to serve 40 eastern Colorado municipalities. ERO is currently conducting cultural and hazardous materials surveys of the pipeline corridor as part of project implementation.

Trans-Canyon Water Distribution Pipeline – Grand Canyon National Park

Garden Creek, Grand Canyon National Park
ERO is preparing an environmental assessment for replacement of the trans-canyon water distribution pipeline in Grand Canyon National Park. The 12.5 mile long trans-canyon pipeline provides potable water to the South Rim of the canyon, as well as all inner canyon facilities.