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Central Valley Chapter
California Land Surveyors Association

Promoting the professional practice of land surveying in the California Central Valley.
Serving the greater Merced, Stanislaus and San Joaquin County Area."

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Prevent Monument Destruction Before It Is Too Late!

Monument Conservation Webinar (From November 14, 2012)

Panelists: Ric Moore, BPELSG Executive Officer; Ray Mathe, BPELSG Staff Land Surveyor; Larry Kereszt, BPELSG Enforcement

View or Download Here

Larry Kereszt

Questions or concerns regarding possible monument preservation issues should be directed to BPELSG Enforcement Analyst Larry Kereszt by email at Larry.Kereszt@dca.ca.gov or by telephone at (916) 263-2240.


Monument Preservation Outreach

The CLSA Central Valley Chapter oversees an ongoing effort to improve monument preservation efforts in the California Central Valley. This web page explains what monument preservation is, discusses why monument preservation is important to the land surveying profession and the public, and provides details on the Chapter's outreach efforts in this area.

Survey Monuments are Protected by the Law

The law protects monuments which are critical to the infrastructure of California. Below are some relevant sections of law pertaining to survey monuments.

What is monument preservation?

Land surveyors set physical monuments for two reasons. The first reason is to mark the location of property boundaries. These monuments are often call property corner monuments. The second reason is to help establish the horizontal and vertical location of the features above, below, or on the earth's surface they map. These monuments are known as survey control monuments or benchmarks. Groups of survey control monuments form survey control networks.

Once a monument is set it can be used again by the same surveyor or by other surveyors working in the area. It is common for a single survey monument to be visited by many different surveyors over the span of several decades. In some cases, a well preserved surveying monument may be visited by a land surveyor over 100 years after it was first set.

There are several factors that can contribute to the destruction or invalidation of a land surveying monument. The physical monument can be destroyed by construction or erosion. It can be moved by geologic forces that raise, sink, or shift the land in which the monument has been set. The monument can be buried or placed underneath buildings and other structures. The most common cause of monument destruction is construction.

Monument preservation is the effort to save surveying monuments from the forces that can destroy, damage, or move them. In particular, California state law requires that government agencies take steps to protect and preserve surveying monuments when they are completing construction projects or funding them.

Why is monument preservation important?

When an existing monument is destroyed the cost of surveys for private citizens, companies, governments, and other organizations increases. Valuable information is lost forever. Ultimately the costs of this lost information and of replacing these destroyed surveying monuments is carried by society as a whole. It is much more efficient, and economical to preserve surveying monuments once they are set.

How is the CLSA Central Valley Chapter helping with monument preservation efforts?

The Chapter has appointed volunteer representatives to coordinate monument preservation efforts with local government agencies. This includes county governments and city governments in the California Central Valley. These governments have a responsibility under California law to ensure that survey monuments are preserved during their construction projects. The Chapter representatives work with their contacts in these governments to make sure that monument preservation is taken care of properly, and to support these governments with their monument preservation efforts whenever possible.

Below is a list of CLSA Central Valley Chapter members who have volunteered to assist with this monument preservation outreach and the government entity they are working with:

  • Landon Blake - San Joaquin County
  • Zachary Wong - City of Stockton
  • Mike Quartaroli - City of Manteca, City of Lathrop, and City of Tracy
  • Mike Turnrose - City of Escalon and City of Ripon
  • Bill Koch - City of Lodi
  • Rich Fultz - City of Turlock
  • Tom DeLaMare - City of Ceres and City of Riverbank
  • Larry Fontana - City of Hughson and City of Waterford
  • Keith Spencer - City of Modesto and City of Patterson

Information and Resources

In and effort to assist the land surveying profession, CLSA has developed resources for Land Surveyors, Public Agencies and Contractors to ensure monument preservation.

Documents Related To Monument Preservation

The list below contains documents that are related to monument preservation. These documents include letters from the Board of Professional Engineers and Land Surveyors related to the monument preservation requirements.

Chapter News:

Mike Durkee,
Land Use Navigatiors
Subdivision Map Act Seminar

April 26, 2017


Our Newsletter "The Prism" May 2017

California Surveyor: "Fall 2016"

BPELSG News:

BPELSG New corner_record_instructions

"It is important to understand that effective April 1, 2017, all new Corner Record submittals must use the new form."

BPELSG Example CBT Examination Questions:

BPELSG Bulletin:Winter 2016


New in the Library:

Tuolumne County - Updated Record Maps and Corner Records, added Mineral Surveys
San Joaquin County - added Filed Map Footprints
updated February 2016 Guide to the Preparation of Maps
updated ROS, PM, M&P, Corner Records
Madera County - updated Record maps
Santa Clara County - updated Record maps and Corner Records
Sacramento County - added link to Geographical Map Index
Fresno County - updated record maps
Stanislaus County - updated record maps


CLSA Chapter Website of the Year - 2012-2014