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Welcome to the PLSC Website!

PLSC is dedicated to the improvement of land surveying education and practice. We encourage land surveying professionals and individuals interested in our profession to participate in our upcoming events, visit our Chapter websites and get involved! This is a great profession, and PLSC is here to support the profession to continually improve the practice within Colorado.

Need a Land Surveyor?

PLSC cannot recommend one surveyor over another. If you need a land surveyor, please review a list of our members under our membership tab or go to the Colorado Department of Regulatory Agencies (DORA) and download the list of Colorado licensed surveyors and also check for any disciplinary actions against a particular surveyor under the "Verify License Tab" on the DORA site. Certified Federal Surveyors are listed at Be sure to check references for the surveyor you are considering hiring.


ALTA/ACSM questions
Posted December 08, 2014

NSPS Thanks to all who have commented on the series of questions that have been posted about the ALTA/ACSM Land Title Survey Requirements. From time to time, we receive requests for access to the entire series of questions. Access can be achieved through the link, and in the search box type in ALTA. NSPS also plans to provide this link directly from their soon-to-be-completed new website.

Highline CBL Notice of Construction
Posted February 24, 2014

CDOT has an active construction project underway at the Highline CBL located at Tower Road and I-70rendering it unusable.Please do not attempt to access this baseline until further notice.To locate another CBL please refer to:


Want to Become a Certified Federal Surveyor?
Posted March 28, 2013

Co-administered by the Department of the Interior's Bureau of Land Management and the National Society of Professional Surveyors (NSPS), the Program provides extensive training for Professional Land Surveyors in dealing with federal survey processes.


Classified Ads

TitleEmployerPost Date
Survey Instrument Person IMerrick & Company12/30/14
Survey Manager 01/12/15
Survey Project Manager 01/08/15


Member Spotlight

PLSC would like to introduce you to our members. If you would like to submit your photo and information for a future Spotlight, email the information to

Earl F. Henderson, PLS,  ended his career as a "young salt"/professional sailor when he started his survey career with a brief term of employment at Greenehorne & O'Mara in Annapolis, MD.  He then gratefully spent the next nine years in the colloquial system of surveying in the shadow of the Blue Ridge Mountains at Hurt & Proffitt, Inc. in Lynchburg, VA while building a timberframe home on his wife's family farm.  In 1999 he and his wife decided to move to Boulder, CO and the PLSS.  After five years of employment at Drexel, Barrell & Co. he started his own business, Zenith Land Surveying,Inc. (ZLS) in 2004.  He worked happily as a “solo surveyor” until recently when he began to expand the business.  He has been a staff writer for Professional Surveyor Magazine since 2004 writing fictional stories under the byline “The Humor in Surveying” and “Gigglebytes”, although most of those contributions were prior to 2010.  He was active in and on the Board of the CCPS until 2011 when Gov. John Hickenlooper saw fit to appoint him to the State Board of Licensure for Architects, Professional Engineers and Professional Land Surveyors (AES Board) where he currently serves as the Board Chair.  He has a regular column in Sideshots where he discusses the intricacies of the Colorado State Statutes and Board Rules pertaining to land surveying.  Some land surveyors even agree with his ideas.  Earl and the ZLS staff specialize in the art of retracement land surveying.

PLSC would like to thank our Sustaining Members and Sponsors:

  Encompass Services, LLC
 PWSI Land Surveyors
SKLD Information Svcs.
Professional Land Surveyors of Colorado
PO Box 441069
Aurora, CO 80044
Phone - (303) 551-3266 Fax - (720) 230-4846
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Check out our chapters:
Central Colorado Professional Surveyors | Colorado Spatial Reference Network | Northern Chapter - PLSC | Northwest 1/4 Colorado Land SurveyorsSouthern Chapter Professional Land Surveyors | Southwestern Chapter - PLSC, Inc. | Western Colorado Land Surveyors