Stell’s biologists, ecologists, and environmental scientists are proven leaders in their fields and have logged thousands of field hours conducting in-depth and comprehensive surveys and assessments on flora and fauna, wetlands, and invasive and sensitive species and their associated habitats. Our natural resources specialists have conducted Endangered Species Act (ESA) Section 7 consultations and mitigation negotiations, ESA Section 10 surveys, biological assessments, monitoring surveys, habitat assessment, ecological risk assessments, wetland delineations in accordance with the U.S. Army Corps of Engineers Wetland Delineation Manual and appropriate Regional Supplements, Chapter 105/404 permitting, General Permits, and field survey oversight.


Successful Projects:

Small Whorled Pogonia Survey, Marine Corps Base (MCB) Quantico, VA (U.S. Marine Corps)

The small whorled pogonia (SWP) is a federally threatened plant of the orchid family. Habitat loss, primarily from development, continues to threaten populations of the SWP across its range. Using a U.S. Fish and Wildlife Service (USFWS)-approved SWP surveyor, we conducted an SWP survey over 330 acres of training lands on MCB Quantico. A preliminary evaluation of suitable habitat focused the scope of the survey and allowed us to complete it within a USFWS-recommended survey window. The SWP survey report will inform forest management actions in support of planned roadway and operational access improvements on the Base, including an associated National Environmental Policy Act study and any necessary Endangered Species Act Section 7 consultation requirements for the SWP.


Wildlife Management, Yakima Training Center, WA (U.S. Army)

Stell conducted habitat monitoring, inventories, species surveys, protective measure recommendations, compliance monitoring, restoration planning, and implementation to support the Yakima Training Center’s wildlife management.

  • Sage grouse lek monitoring, ground and aerial lek searches
  • Stream assessments and presence/absence surveys to document distribution and occurrence for Chinook salmon, steelhead, and redds
  • Implementation of Integrated Natural Resources Management Plan (INRMP) actions and Endangered Species Management Plans to monitor and maintain population and land management goals

We conducted rare plant surveys, population inventories, and habitat monitoring,

  • Monitored noxious weed populations in accordance with metrics such as species, locations, density, and relevant surrounding resource information.
  • Developed effective control management strategies (including monitoring of biological control agents) using trend analysis.
  • Prepared monitoring reports and a Migratory Bird Management Plan.

Our multi-resource crew identified two extremely invasive plant species. Their early identification has allowed initiation of control measures early to eradicate the species. This will reduce control costs and allow for reduced impact of these measures on training schedules and land accessibility, maintaining training lands as mission focused.

Stell has been one of the very best contractors I have had the pleasure to work with.  They strive for excellence…” – Project Manager, U.S. Army Corps of Engineers, Seattle District


State Route 611 Section 04S Scotrun/Swiftwater Corridor Improvement Project (Pennsylvania Department of Transportation)

Stell provided environmental support services to the project design team. We were responsible for environmental clearance during preliminary engineering, including a wetlands identification and delineation, a Phase I bog turtle habitat assessment, threatened and endangered species coordination and habitat assessments, wetlands and waterways permitting support including a preliminary jurisdictional determination and regulatory agency coordination, and off-site riparian buffer stream mitigation review and assessment.