Mineral & Land Records System (MLRS)

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MLRS Overview

The Bureau of Land Management (BLM) is developing the Mineral & Land Records System (MLRS) to replace the Legacy Rehost 2000 (LR2000) case management system, Alaska Land Information System (ALIS), and land status records (e.g., Master Title Plats, Historical Indices, Tract Books).

MLRS is a customer-centric, geospatially enabled land information system that employs nationally standardized business processes, ensuring the quality and accuracy of land and mineral records and data while securely delivering land records information to relevant BLM staff, customers, and the public.

MLRS is currently available for mining claims, oil and gas, and geothermal cases. Over the next two years, additional MLRS modules will be released in support of land use authorizations and realty billing; coal and other mineral development; land and mineral title; and withdrawals, classifications, and other actions on Federal lands and mineral estate.


Notice to MLRS Users

Updated Feb. 21, 2023

The MLRS Community site is back online with system changes that limit access to Personally Identifiable Information (PII), based on whether a customer is logged in to MLRS. This is to ensure Privacy Act compliance and protect customer data from unauthorized use. Here are the changes that will impact customers:

  • Logged in (i.e., “authenticated”) users will need to answer a brief survey providing the purpose of their system usage.
  • Users with existing BLM cases who wish to create an MLRS person account will need to enter a Customer ID and a serial number (either legacy SN or MLRS SN) from one of their cases. (Users must contact the BLM to receive their Customer ID.)
  • Only logged in users will be able to access the name and address of person accounts as well as case files and case action remarks.
  • All users will no longer be able to see case operator and creator data.

Visit the MLRS Community site at https://mlrs.blm.gov to get started.

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Frequently Asked Questions

Note: The following FAQs are focused on the new MLRS Fluid Minerals & Geothermal module. For FAQs and other support related to the Mining Claims module, visit the MLRS Help Center by clicking on the following button:




What can I do as a registered user in MLRS for Oil & Gas and Geothermal case types?

MLRS enables you to view your cases through the online portal. You can:

  • Track your case status
  • View and bookmark current and historic land information on the research map
  • Access a custom view of your leases and agreements
  • Create and modify your MLRS profile

Please note: to create and track lease nominations, you will continue to use the National Fluids Lease Sale System (NFLSS).

When will Oil & Gas and Geothermal cases be available in MLRS?

Oil & gas and geothermal cases are available in MLRS as of March 14, 2022.

Does the introduction of MLRS change anything for Oil & Gas and Geothermal businesses or individual lessees?

The MLRS system does not change processes but enhances how you interact with case data online. Businesses and individual lessees have transparency into tracking and viewing their leases and agreements with the MLRS system from the convenience of a computer or mobile device. 

I heard the BLM's serial numbers are changing. What is the new format and what else do I need to know?

With MLRS, the BLM is transforming the standardized serial number format nationwide. The new format is: two-letter abbreviation for the geographic state, two letters for the BLM administrative state, and nine digits. For example, NMNM12345789. With MLRS, you can view and search for existing cases with the new unique MLRS-generated serial number or your current legacy serial number. New cases will not have a legacy serial number.

Will Operators need to change anything on the ground because of the new serial number?

Operators will not need to change anything on the ground. They will be able to keep the legacy serial number on all existing signage with BLM.

How does MLRS interact with NFLSS? Is NFLSS going away?

MLRS and NFLSS will share data. NFLSS will not be shut down; rather it will work with MLRS by automatically sending updated information to MLRS. All pre-leasing activities will still use NFLSS. Post-leasing actions will be handled by BLM staff in MLRS, and will be viewable by customers in MLRS too.

Where can I find more information on the MLRS Fluid Minerals & Geothermal module?

For more information on the new module, check out our Fluid Minerals & Geothermal Release Information for Operators and Lessees brochure.

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Related Resources


BLM is using a phased, modular approach to transition all case types into MLRS.

Icon of a mining cart filled with stone
Mining Claims
Now live!
Fluid and geothermal icon
Fluid Minerals & Geothermal
Now live!
Natural landscape with mountains, tree, dirt road, sun
Remaining LR2000 Cases
Icon of a solid color in the shape of the State of Alaska
Remaining ALIS Cases
Icon depicting land layers
Next Generation Master Title Plats

Contact Info

General MLRS inquiries:

MLRS technical support: