U.S. Department of the Interior Bureau of Land Management FiNAL Burns District, Oregon November 1985 __ - .-- ,- . L. -- IN REPLY REFER TO United States Department of the Interior BUREAU OF LAND MANAGEMENT BURNS DISTRICT OFFICE 74 S. Alvord Street Burns, Oregon 97720 November 27, 1985 Dear Diamond Craters User : The final Diamond Craters Recreation Management Plan has been completed and a copy is enclosed for your use. This document outlines the management direction the Bureau of Land Management will be taking in the coming years for the Diamond Craters Outstanding Natural Area. These decisions are the result of written and personal public comments received during the 30-day comment period on the draft document. After another 30-day public review period from this publication date, the decisions outlined in this final document will be implemented. All comments should be sent to the Burns District Manager, BLM, 74 S. Alvord St., Burns, Oregon 97720 by December 30 , 1985. Thank you for your interest and support in BLM's Diamond Craters Outstanding Natural Area. Sincerely yours, Warburton District Manager Recreation Area Management Final Plan for the Diamond Craters Outstanding Natural Area Oregon U.S. Department of the Interior Bureau of Land Management Burns District, Oregon Recommended by David E. Vickstrom, Outdoor Recreation Planner Accepted by Malcolm T. Shrode, Three Rivers Resburce Area Manager Approved by DIAMOND CRATERS VICINITY MAP Bureau of Land Management Burns District Oregon -French&m Table of Contents Page PART I - INTRODUCTION. ................................................. 1 BACKGROUND .......................................................... 1 Purpose and Scope ............................................ 1 Relationship to Bureau Planning. .................................. 2 Historical Perspective. ........................................... 1 Recent Secretarial Actions. ....................................... 2 SETTING AND MULTIPLE RESOURCE VALUES ................................ 2 Location and Access ............................................ 2 Area Size and Ownership ......................................... 2 Landscape Character .. : ......................................... Climate ....................................................... Geology ....................................................... t3~EE-ology.. .................................................. Miner&, ‘&I,’ &as; .&othermal.. ...................................................................... Water ......................................................... Vegetation ..................................................... Wildlife.. ..................................................... Cultural Resources .............................................. Recreation/Natural Area Values. ....................... 1 ........... Wilderness Study Areas. ......................................... Range (Livestock and Wild Horses) ................................ USER PROFILE AND VISITATION ESTIMATES ................................. 6 MAJOR ISSUES . ........................................ 8 PART II - MANAGEMENT OBJECTIVE AND CONSTRAINTS. ..................... 9 Management Objective . Management Constraints. ........................................ i PART Ill - MANAGEMENT PLAN. ............................................ IO PART IV - IMPLEMENTATION PHASING AND COST ESTIMATES.. 16 PART V - APPENDICES . 18 Appendix A Planning Participants and Cooperators ................... 18 Appendix B Applicable Federal, State Laws and Regulations. ........... Appendix C Management Program Alternatives. ...................... :: Appendix D Writings of Interest. 22 Part I-Introduction Little Red Cone Background Historical Perspective Diamond Craters were known to the early settlers of eastern Oregon and were named about 1875 for their Purpose and Scope proximity to the Diamond Ranch. This ranch took its The purpose of this recreation plan is to identify specific name from the diamond-shaped cattle brand used by actions and their sequence for implementation to Mace McCoy, an early settler. The name Diamond was manage Diamond Craters as an Outstanding Natural also given to a small community and post office nearby. Area (ONA) and Area of Critical Environmental Concern (ACEC). The main interest shown in the area was as a source for cinders and building stone. The pahoehoe lava from The scope of this issue-oriented document is limited to Diamond Craters has been used for construction since a discussion of those actions required to resolve issues the late 1800’s. Many of the local roads and driveways and utilize the opportunities available in the area. Detail- are covered with Diamond Craters cinders. Numerous ed site planning and facility designing will be con- buildings, including the well-known Round Barn, are sidered following approval of the specific management faced with slab lava from the Craters. actions. More recently thin slabs of basalt attracted the atten- Relationship to Bureau Planning tion of rock dealers who removed the lava without Diamond Craters is a special management area iden- authorization to sell for decorative facing stone. The tified in the Drewsey Resource Area Management trespasser’s heavy equipment shattered the pahoehoe Framework Plan (now part of the Three Rivers Resource to powder, which left permanent scars, while the Area) in the Burns District. Its designation as an ONA removal of the basalt destroyed features necessary for and as an ACEC is consistent with the District’s land interpretation of the geology. It was not until the mid use recommendations and decisions. 1960’s that a significant number of educators and students became knowledgeable and concerned about the natural resources of the Craters. Few realized what outstanding values it held. Courses offered at the 1 Malheur Field Station stimulated interest in Diamond Landscape Character Craters which led to the protective designations and The most striking visual characteristic of this landscape management direction followed today by the Bureau. is the geologically recent volcanic activity. The expos ed lava flows, vents, craters, and domes interspersec with pockets of vegetation are the dominant features. Recent Secretarial Actions The landform is gently rolling to nearly flat, interrupted The Bureau designated Diamond Craters as an Area by vents and craters that usually appear as depressions of Critical Environmental Concern on December 2, rather than cones. The landform has no strong linear 1980. This designation declared special management qualities. Course textured rock outcrops are frequent, attention be given to protect and prevent irreparable as the vegetation has not developed to completely cover damage to the geologic features and ecosystems of the the recent volcanic flows. area. The dark colored volcanic rocks intermix with the tans Public Land Order 5822 withdrew 16,656.18 acres of and greens of the vegetation to create a subtle contrast public lands on January 22, 1981, from the operation in color and texture. Grasses and sagebrush are the of the general land laws including the mining laws, but common vegetative cover. Water is seldom visible in the not from leasing under the mineral leasing laws for the landscape. protection and preservation of geologic and biological resources of exceptional scientific, educational, scenic and recreational values. Climate Summers are hot and dry. Most of the precipitation falls Diamond Craters was designated as an Outstanding during the cold winters and early spring; mean annual Natural Area on April 1, 1982, under the general precipitation varies between 6 and 16 inches. Sunshine category of Recreation Lands, which identifies lands occurs approximately 225 days per year. Daily max- where recreation is expected to be a major use. As imum and minimum temperatures can be extreme dur- Class IV Recreation Lands, Outstanding Natural Areas ing a single day and frosts may occur any night of the are “areas of outstanding scenic splendor, natural year. wonder or scientific importance” that merit special at- tention and care in management to ensure their preser- vation in their natural condition. Geology Diamond Craters is geologically unique in the United States. A great variety of basaltic igneous-volcanic Setting and Multiple structures representing a complex series of geologic events are present within a small geographic area. Resource Values Preservation of volcanic features is excellent due to a lack of erosion (Peterson and Groh, 1964). The unusual concentration of igneous features is related to the Location and Access geologic environment occurring at the junction of the Diamond Craters is located near the center of Harney High Lava Plains Province and the Basin and Range County in southeast Oregon’s high desert country. The Province at the time of volcanic activity. area lies about 40 air miles southeast of Burns in Township 28 and 29 South, Range 32 East. It is remote The geology of the area illustrates a sequence of in- from population centers but access is not difficult. One trusive, extrusive and pyroclastic igneous activity route is southeast from Burns on Oregon State Highway resulting in complex eruptions associated with unusual 78 to the junction at New Princeton, then south and west localized doming. These eruptions display the entire by well-marked all-weather roads that skirt the eastern range of explosive and collapse activity which can oc- and southern parts of the Craters. Another route is south cur in conjunction