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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.


COFPAES/NSPS promotes benefits of professional licensure
Posted September 18, 2014

The Council on Federal Procurement of Architectural & Engineering Services (COFPAES), of which NSPS is a member, has written the Chairman of the Small Business Committee in the U.S. House of Representatives, Rep. Sam Graves (R-MO), explaining the rationale and history of licensure of architects, engineers and surveyors. The COFPAES letter is in response to a request Rep. Graves has made to the Small Business Administration's office of advocacy to conduct a study of the economic impact of such state licensing regulations. Critics have pointed out that states now license an increasing number of occupations, some of which have little impact on public health, welfare and safety, and serve only to limit competition in the marketplace. The COFPAES letter points out that public health, safety and welfare benefit from architecture, engineering and surveying licensure.

Georgia Museum of Surveying Mapping Faces Closing
Posted September 15, 2014

Georgia Museum of Surveying Mapping Faces ClosingThe Georgia Museum of Surveying and Mapping (GAMOSAM), located in Warrenton, GA, faces closing in the very near future unless a new home for the museum is located very soon. The museum was started in the late 2000's by Mr. Dan Crumpton, a local historian, land surveyor and forester in Warrenton, GA. Dan has always had a passion for the history of the land surveying profession, and he has directed this passion into the creation of this museum. The museum was officially incorporated in 2009 and a board of directors was established at that time. The museum is currently housed in a store front in downtown Warrenton, GA, and has well over 100 valuable survey related artifacts. These artifacts include a wide range of items, including antique land surveying equipment, computers, plotters, maps, etc. Most of these artifacts were donated to the museum from land surveyors throughout the state of GA.Mr. Crumpton has announced his impending retirement from land surveying and from the museum to the museum's board of directors and has expressed his strong desire to hand off the museum to another person or entity for care and management. The Board and Mr. Crumpton are seeking someone to house and manage this museum, preferably within the state of GA. This museum is a valuable asset to our profession and our state and would have a bright future if it were to be kept together and managed appropriately. The museum's board of directors is seeking ideas for possible locations for the museum. We are asking all land surveyors within the state to please consider your community and local resources and let any member of the board of GAMOSAM know if you or someone in your community are interested in housing this museum. If we are not able to locate a new home for the museum by early 2015, we will likely lose this asset to our profession and state forever!If you are interested in this opportunity, or if you know a person or entity that may be interested, please contact Mr. DanCrumpton directly via phone at 706-465-9919 or via email at

BLM Manual of Surveying Instructions
Posted September 04, 2014

Manual of Surveying Instructions (2009) is now Available in Digital format


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:


Classified Ads

TitleEmployerPost Date
Land Surveyor Party Chief 09/25/14
Land Surveyor Technician 09/25/14
Project Surveyor/Land Surveyor 09/25/14
Survey Sales SpecialistGeoShack North America, Inc.09/29/14
Transporation SurveyorCalifornia Department of Transportation09/08/14


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

Dennis Shellhorn, PLS, a founder and past principal of River City Consultants, has been in the surveying profession since 1975 and licensed in Colorado since 1981.  He has been involved in a wide range of surveying projects including mining, highway construction, residential development, cadastral surveying for the U.S. Forest Service, GPS control surveying, boundary surveying and extensive design and topographic surveys in that time. 
Among his memorable projects is the French Creek Tunnel on I-70 in Glenwood Canyon. Dennis was the Project Surveyor for the highway tunnel and six other major phases of the Glenwood Canyon I-70 over a period of eight years. He relocated to Grand Junction where he managed crews and performed surveys for highway and airport construction, residential subdivisions and most enjoyably cadastral surveys for the Forest Service.
Colorado companies that have enjoyed Dennis’ expertise and professionalism include Armstrong Associates, Western States Surveying, Thompson-Langford Corporation and of course River City Consultants from which Dennis retired in December 2012. He seems to have settled well into retirement although he is still helping out at River City when his special talents are needed.
Dennis is an avid golfer, outdoorsman, fisherman and hunter and has enjoyed the first few months of full retirement golfing and doing some fishing.  Bird hunting season is just around the corner and Dennis has been helping out at a local hunting club. His participation there resulted in being featured last year on the cover of the Orvis hunting catalog.

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 460022
Denver, Co 80246
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