B--TWIN CREEK ROCK ART INVENTORY SURVEY

U.S. BUREAU OF LAND MANAGEMENT WIND RIVER/BIGHORN BASIN DISTRICT LANDER FIELD OFFICE, WYOMING Cultural Resources Inventory (Class II) and Re-recording of Rock Art Sites in the Lower Twin Creek Sub-watershed, FY2026 STATEMENT OF WORK I. Introduction and Background The purpose of this project is to conduct a Class II inventory (probabilistic field survey) to identify and record previously unidentified rock art sites and to re-record 18 known rock art sites within the Lower Twin Creek sub-watershed, which, on Bureau of Land Management (BLM) Lander Field Office (LFO) managed surface largely falls within the Twin Creek Area of Critical Environmental Concern (ACEC) and encompasses the Johnny Behind the Rocks Special Recreation Management Area (JBR SRMA). The objective is to assess the number, type(s), and traits of rock art sites present within this high-use area of the LFO, which will in turn assist in future predictive model creation, land use planning decision-making, tribal consultation, and individual project review. The JBR SRMA will be excluded from inventory, but rock art previously recorded within it should be re-recorded and discussed in the report. Sites previously recorded in areas of surface management other than BLM (e.g., State or private) should be discussed in the report but not inventoried or re-recorded. The contractor shall develop a Class II inventory strategy that identifies specific areas totaling 325 acres within the Lower Twin Creek sub-watershed. The goal of the inventory strategy should be to identify previously unidentified rock art on BLM- managed surface. The inventory strategy shall be subject to BLM review and approval. The contractor will also perform a full site re-recording for 18 previously identified rock art sites in the Lower Twin Creek sub-watershed. Inventory strategy and fieldwork should meet the definitions and requirements of probabilistic field survey from the WY SHPO-BLM Protocol (“Protocol”) and BLM Handbook 8110. Upon completion of the fieldwork, a report shall be submitted that discusses the findings of the fieldwork and makes recommendations of site eligibilities for both new and updated sites. For the purposes of this project, “rock art” refers to any petroglyph and/or pictograph created on any type of rock surface, regardless of bedrock and surface geology or the landform type the feature is on (e.g., boulder, cliff, outcrop), whose approximate or precise age predates the arrival of Euro-American settlers in the area and whose style and/or approximated or precise age indicate a Native American cultural affiliation. In instances where style, age, or other qualities of a rock art feature cannot yield a definitive cultural affiliation, the resource should be treated as if it meets the definition discussed -- 1 of 7 -- here, and the lack of definitive affiliation should be discussed in its site form and the report. II. Project Location and Scope The geographic area for this project is the boundary of the Lower Twin Creek sub- watershed. The boundaries of the sub-watershed encompass the following legal locations: Township 32 North, Range 99 West: sections 24, 25 Township 32 North, Range 98 West: sections 17, 18, 19, 20, 21, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36 Township 32 North, Range 97 West: sections 19, 20, 21, 28, 29, 30, 31, 32, 33 Township 31 North, Range 99 West: sections 13, 23, 24, 25, 26, 36 Township 31 North, Range 98 West: sections 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 26, 27, 28, 29, 30, 31, 32, 33, 34 Township 31 North, Range 97 West: sections 5, 6, 7, 8, 16, 17, 18, 19, 20, 21, 29 Township 30 North, Range 99 West: section 1 Township 30 North, Range 98 West: sections 4, 5, 6 The Lander Field Office (LFO) is located in west-central Wyoming. The Twin Creek sub-watershed is located in Fremont County, whose western edge is approximately 10.25 miles southeast of the town of Lander. The elevation within the sub-watershed is variable, ranging from approximately 5,400 feet above sea level (asl) to 7,100 feet asl. The sub- watershed totals 33,300 acres. The sub-watershed encompasses lands whose surface ownership may be Bureau of Land Management – Lander Field Office (BLM LFO), State (may include Office of State Lands & Investments [OSLI], Wyoming Game & Fish [WGF], or other entities), or private. Although literature reviews should include sites recorded on all surface ownership statuses, and such sites should also be discussed in the inventory strategy and report, inventory and site re-recording efforts will only occur on BLM LFO surface. Access to sites and inventory areas will be variable, but will include a mix of paved, improved, and two-track/unimproved roads. Use of a 4WD, high clearance vehicle is required to access many areas, and in some instances, the use of a UTV or an ATV may be more suitable. The contractor will need to use georeferenced access maps, county roads and land data map servers, and other mapping technologies to identify which travel routes are viable and accessible; the contractor will be responsible for obtaining private landowner permission to cross properties on existing roads, if absolutely necessary. Terrain within the sub-watershed is variable, ranging from sagebrush dominated basins -- 2 of 7 -- and drainages to steep cliff bands. Additionally, while encounters are rare, the project area may have habitats suitable for mountain lions, wolves, black bears, and/or grizzly bears. The contractor should follow best practices (such as those recommended by the Interagency Grizzly Bear Committee: https://igbconline.org/be-bear-aware/) for hiking and working in predator habitat. Broadly, the contractor is responsible for identifying appropriate inventory strategies per the conditions that will ensure the safety of all fieldgoing personnel. III. Statement of Work The contractor shall first conduct a literature review (background research) of known rock art sites in an…