environmental solutions

Collapsing Range of an Endemic Great Plains Minnow, Peppered Chub Macrhybopsis tetranema

January 23, 2017

The authors of this white paper entitled “Collapsing Range of an Endemic Great Plains Minnow, Peppered Chub Macrhybopsis tetranema,” examine range-wide declines in both abundance and distribution of the Peppered Chub from habitat loss and fragmentation.

Habitat loss and fragmentation include dams, loss of perineal flows, and alteration of flow regimes (flooding). These habitat alterations impact the spawning needs of pelagic-spawning fish and jeopardize the survivability of this species within its historical range. It is estimated that the Peppered Chub has been extirpated from more than 90% of its historic range.

A recovery plan for the Peppered Chub might consider restoration and maintenance of adequate seasonal fluctuating river flows, removal of barriers, and repatriation to river reaches that have experienced extirpation.

The authors suggest repatriation or supplemental stocking as is done elsewhere for small- bodied cyprinids as a necessary first step in recovery, but this alone might not be sustainable or sufficient without taking the proper actions to remedy habitat deficiencies. Specifically, removing or modifying to allow fish passage the remaining barriers impeding upstream recolonization of rivers throughout the species’ historical range and maintaining adequate seasonal river flows to support juvenile survival is likely necessary for recruitment.

Construction of a fish passage structure on the Arkansas River in Wichita, Kansas was recently completed in 2010. This fish passage was built with the passage of small-bodied fishes as a primary function and has already allowed for the recolonization of Emerald Shiner Notropis atherinoides into a reach of river from which the species was previously extirpated. This suggests that fish passage structures such as this can restore upstream connectivity for small-bodied Great Plains fishes.

Take me to the whitepaper.


The Authors:

Division of Biology, Kansas State University, Manhattan 66506

Department of Biology, Tennessee Technological University, Cookeville 38505

SCS Engineers, Wichita, Kansas 67226

U.S. Fish and Wildlife Service, New Mexico Fish and Wildlife Conservation Office, Albuquerque 87109

New Mexico Department of Game and Fish, Santa Fe 87504


Posted by Diane Samuels at 3:00 am

Los Angeles Business Journal Posts 2015 Largest Environmental Firms List

December 9, 2015

Downtown Los Angeles with San Gabriel Mountains in the background.
Downtown Los Angeles with San Gabriel Mountains in the background.

SCS Engineers ranks 4th on the Los Angeles Business Journal’s list of the top 25 largest environmental services firms in the Los Angeles region. “We’re very proud of our environmental work in California and across the nation,“ stated Pat Sullivan, BCES, CPP, REPA, and a Senior Vice President of SCS Engineers. “It’s especially rewarding to know that we make a positive difference in our backyard and for the regional economy.”

See the Los Angeles Business Journal List

Posted by Diane Samuels at 3:23 pm

Nathan Hamm of SCS Elected to Lead the Kansas Sunflower SWANA Chapter

November 5, 2015

The Solid Waste Association of North America – SWANA, is the largest member-based solid waste management association in the world.

Nathan Hamm, PE at SCS Engineers

SCS Engineers proudly announces Nathan Hamm, P.E., is the recently elected President of the Kansas Sunflower SWANA chapter. Members of the chapter voted to elect Hamm to continue the leadership of John Hawk, the former chapter President and the General Manager of the McPherson Area Solid Waste Utility. Hamm’s term began on October 22, 2015, and will run for two years.

Nathan Hamm is a registered professional engineer in Kansas and five surrounding states with nearly two decades of experience in the field of environmental engineering. He is a Vice President at SCS and currently serves as the Overland Park –Kansas City Office Manager. As Office Manager, he is responsible for managing the technical and support personnel and the office’s financial performance and business development efforts. He also manages complex projects, maintains client relationships, and provides technical guidance.

“An environmental solution mandates innovative thinking and broad resources, “stated Hamm. “ Our Kansas SWANA chapter provides these and stays true to our principles; that’s how we remain effective and helpful to our members.”

Hamm’s career has concentrated on environmental solutions in solid waste management, alternative energy, power generation, and in agricultural production industries. He is a skilled leader developing and managing multi-disciplinary teams to achieve critical objectives.

Congratulations Nathan!

Posted by Diane Samuels at 6:00 am