Special-Status Species’ Surveys

Ventura River Steelhead Habitat Assessment, Ventura, California

Project Name: Ventura River Steelhead Habitat Assessment, Ventura, California
Services: Special Status Species Survey
Client: Hopkins Groundwater Consultants (under contract to the City of Ventura)

Padre conducted a steelhead habitat assessment as part of a surface water/groundwater interaction study conducted within the City of Ventura’s water well field at Foster Park. Padre biologists utilized the rainbow trout Habitat Suitability Index (HSI) model developed by the U.S. Fish and Wildlife Service, as modified by Thomas R. Payne & Associates. The study reach was classified according to the California Department of Fish and Game Level II stream habitat classification system, which identified 11 percent pools, 43 percent runs and 46 percent riffles within the 8,850 foot-long study reach. Six sample units were randomly selected from each of three habitat types, yielding 18 sample units (6 pools, 6 runs, and 6 riffles). The 18 units were sampled during each of 24 sampling events selected to encompass the dry season decline in surface flow, May to September. Most of the data was collected during periods of normal groundwater pumping by the City (as required to meet seasonal demands). However, groundwater pumping was manipulated prior to several sampling events to observe the effect of groundwater pumping at Foster Park on surface water flow rate and steelhead habitat. The assessment indicated that HSI values for adult steelhead declined drastically as the average water depth over the dry season declined below 25 cm.

Chevron McKittrick Gas Line Upgrades, Kern County, California

Project Name: Chevron McKittrick Gas Line Upgrades, Kern County, California
Services: Special Status Species Survey
Client: Chevron Pipe Line Company

Padre conducted biological assessments to identify any threatened, endangered, or otherwise sensitive (TES) plant and animal species that may be present within or surrounding the project sites. Padre biologists performed reconnaissance level biological surveys to identify suitable areas for project activities including access routes, staging, and work areas. The field surveys were conducted to determine presence of TES species as well as document existing biological conditions at the project sites prior to construction. The coverage area of the survey included a 100-foot radius around the project sites. Pedestrian surveys were conducted for the planned work, staging, and access areas in an effort to identify suitable habitat for TES species and/or signs (e.g. nests, burrows, scat, tracks, prey remains, etc.) of their presence. TES species anticipated to inhabit the area include San Joaquin kit fox (Vulpes macrotis mutica), San Joaquin antelope squirrel (Ammospermophilus nelsoni), giant kangaroo rat (Dipodomys ingens) and blunt-nosed leopard lizard (Gambelia sila).

Proposed Cellular Tower Site - Camp Roberts, San Luis Obispo County, California

Project Name: Proposed Cellular Tower Site - Camp Roberts, San Luis Obispo County, California
Services: San Joaquin Kit Fox Survey
Client: Crown Castle USA Inc.

Padre conducted a walkover survey for a proposed lattice cellular tower project site at Camp Roberts in San Luis Obispo County, California. The survey was conducted to identify active, potential, and atypical San Joaquin kit fox den sites. The inspection included walking transects through the 3.3-acre project cellular tower site as well as an additional 200-foot buffer to ensure 100 percent visual coverage. All burrows that were at least four-inches in diameter were flagged and mapped, and inspected for signs of SJKF occupancy (scat, tracks, prey remains, hair, etc). A total of three potential dens were located and reported to base staff for further analysis.