2017 Annual Report: Cultural Resources Surveys Conducted for 30 Anadarko Petroleum Corporation Projects on General Land Office Property in Reeves County, Texas

During the 2017 calendar year, Horizon Environmental Services, Inc. (Horizon) conducted intensive cultural resources surveys for 30 proposed Anadarko Petroleum Corporation (Anadarko) projects located on property owned by the Texas General Land Office (GLO) in Reeves County, Texas (Project Areas). These projects included well pads, access roads, and pipeline rights-of-way (ROWs). All 30 projects were privately funded and did not require any federal permitting or coordination. However, as the GLO is considered to be a political subdivision of the State of Texas, the portions of the 30 projects on GLO property all fell under the regulations of the Antiquities Code of Texas (ACT). At the request of Whitenton Group, Inc. (Whitenton), Horizon conducted the cultural resources surveys of the Project Areas on behalf of Anadarko in compliance with the ACT. The purpose of the surveys was to determine if any archeological sites were located within the 30 Project Areas and, if any existed, to determine if the projects had the potential to have any adverse impacts on sites considered eligible for formal designation as State Antiquities Landmarks (SALs). The cultural resources surveys were conducted under Texas Antiquities Committee (TAC) annual permit number 7883. The cultural resources surveys of the 30 Project Areas resulted in the documentation of 3 new archeological sites (41RV116, 41RV119, and 41RV120). Site 41RV116 was documented as a moderate-density prehistoric lithic scatter on a small rise to the north of Halamicek Draw within Anadarko’s Block 55 (Area C) Gas, Oil, and SWD Pipeline ROW project. The presence of early-stage lithic reduction debris on the site, coupled with the lack of formal tools, features, or fire-cracked rock (FCR), suggests that the site functioned as a lithic procurement area rather than a campsite. Based on (1) the surficial nature of the observed cultural deposits; (2) the lack of buried, stratified cultural deposits; and (3) the lack of any temporally diagnostic materials on the site, it was Horizon’s opinion that site 41RV116 was ineligible for formal designation as a SAL. With this in mind, Horizon recommended that no additional investigations were warranted on site 41RV116 in connection with the Block 55 (Area C) Gas, Oil, and SWD Pipeline ROW project. The Texas Historical Commission (THC) concurred with this assessment on 16 May 2017. Site 41RV119 was documented as a moderate-density prehistoric lithic scatter within a generally featureless desert upland to the south of a tributary of Smith Draw within Anadarko’s Mako State 2-34 Frac Pond to Laramie 55-4-7 Frac Pond Water Transfer Pipeline ROW project. The presence of early-stage lithic reduction debris on the site, coupled with the lack of formal tools, features, or FCR, suggests that the site functioned as a lithic procurement area rather than a campsite. Based on (1) the surficial nature of the observed cultural deposits; (2) the lack of buried, stratified cultural deposits; and (3) the lack of any temporally diagnostic materials on the site, it was Horizon’s opinion that site 41RV119 was ineligible for formal designation as a SAL. With this in mind, Horizon recommended that no additional investigations were warranted on site 41RV119 in connection with the Mako State 2-34 Frac Pond to Laramie 55-4-7 Frac Pond Water Transfer Pipeline ROW project. The THC concurred with this assessment on 6 June 2017. Finally, site 41RV120 was documented as a low-density prehistoric lithic scatter on the gradual slope of a small rise to the northwest of Horsehead Draw within Anadarko’s Reeves Oil Pipeline Phase I and Block 56 (Area B) to Block 55 (Area C) Gas, Oil, and SWD Pipeline ROW project. The presence of early-stage lithic reduction debris on the site, coupled with the lack of formal tools, features, or FCR, suggests that the site functioned as a lithic procurement area rather than a campsite. Based on (1) the surficial nature of the observed cultural deposits; (2) the lack of buried, stratified cultural deposits; and (3) the lack of any temporally diagnostic materials on the site, it was Horizon’s opinion that site 41RV120 was ineligible for formal designation as a SAL. With this in mind, Horizon recommended that no additional investigations were warranted on site 41RV119 in connection with the Reeves Oil Pipeline Phase I and Block 56 (Area B) to Block 55 (Area C) Gas, Oil, and SWD Pipeline ROW project. The THC concurred with the site assessment and Avoidance Plan on 26 July 2017. The cultural resources surveys conducted on the remaining 27 projects all produced negative results. Based on the negative survey results, it was Horizon’s opinion that the construction of the remaining 27 projects would have no adverse effect on significant cultural resources designated as or considered eligible for designation as SALs. Horizon therefore recommended that Anadarko be allowed to proceed with the construction of these projects relative to the jurisdiction of the ACT. The THC concurred with these recommendations

An Intensive Cultural Resources Survey of a Segment of Plains All American Pipeline, LP’s Proposed China Draw Expansion Project Located on GLO Property in Reeves County, Texas

On 26 September 2017, Horizon Environmental Services, Inc. (Horizon) conducted an intensive cultural resources survey of a segment of Plains All American Pipeline, LP’s (Plains) proposed China Draw Expansion pipeline right-of-way (ROW) located in northwestern Reeves County, Texas (Project Area). The development of the pipeline ROW will be privately funded and will not require any federal permitting or coordination. However, a 1.0-mile (1.6-kilometer [km])-long segment of the proposed ROW is located on property owned by the Texas General Land Office (GLO). As the GLO is considered to be a political subdivision of the state, the portion of the undertaking on GLO property falls under the regulations of the Antiquities Code of Texas (ACT). At the request of Whitenton Group, Inc. (Whitenton), Horizon conducted the cultural resources survey of the Project Area on behalf of Plains in compliance with the ACT. The purpose of the survey was to determine if any archeological sites were located within the Project Area and, if any existed, to determine if the project had the potential to have any adverse impacts on sites considered eligible for formal designation as State Antiquities Landmarks (SALs). The cultural resources survey was conducted under Texas Antiquities Committee (TAC) permit number 8170. Overall, the entire proposed ROW measures 6.7 miles (10.9 km) long by 30.0 feet (9.1 meters [m]) wide, with a total area of approximately 24.4 acres. However, the Project Area (i.e., the segment of the proposed ROW that crosses GLO property) measures only 1.0 mile (1.6 km) long by 30.0 feet (9.1 m) wide, with a total area of approximately 3.6 acres. The cultural resources survey of the Project Area resulted in entirely negative findings. No cultural materials were observed on the surface of the Project Area or within any of the 17 excavated shovel tests. Based on the negative survey results, it is Horizon’s opinion that the construction of the proposed China Draw Expansion Project across GLO property will have no adverse effect on significant cultural resources designated as or considered eligible for designation as SALs. Horizon therefore recommends that Plains be allowed to proceed with the construction of the proposed pipeline relative to the jurisdiction of the ACT

An Intensive Cultural Resources Survey of Brazos Electric Cooperative, Inc.’s Proposed 22.0-acre Railport Substation Property in Ellis County, Texas

On 24 March 2015, Horizon Environmental Services, Inc. (Horizon) conducted an intensive cultural resources survey of Brazos Electric Cooperative, Inc.’s (Brazos) proposed 22.0-acre Railport Substation property in northwestern Ellis County, Texas (Project Area). The Project Area is located on private property, and its development will be funded by private sources. Additionally, no state or federal permitting is currently anticipated in connection with the proposed undertaking. As such, no identifiable regulatory requirements exist regarding cultural resources management. At the request of Brazos, Horizon conducted the cultural resources survey of the Project Area as part of Brazos’s due diligence process. Brazos intends to develop only 5.0 acres of the overall 22.0-acre parcel into a new electric substation. As the exact location of the proposed substation within the 22.0-acre parcel has yet to be determined, the entire 22.0-acre Project Area was assessed. The purpose of the survey was to determine if any cultural resources were located within the Project Area and, if any existed, allow Brazos the opportunity to make an informed decision regarding the development of the property. The cultural resources survey entailed intensive surface inspection and subsurface shovel testing efforts over the extent of the 22.0-acre Project Area. The Texas State Minimum Archeological Survey Standards (TSMASS) require a minimum of 1 shovel test per 2.0 acres for projects between 11.0 and 100.0 acres in size. As the Project Area totals 22.0 acres in size, a minimum of 11 shovel tests were necessary in order to comply with the TSMASS. Horizon exceeded the TSMASS by excavating a total of 22 shovel tests across the Project Area. The cultural resources survey resulted in entirely negative findings. No cultural materials were observed on the surface of the Project Area or within any of the 22 excavated shovel tests. Based on the negative survey results, it is Horizon’s opinion that the development of the proposed 22.0-acre Railport Substation property will have no adverse effect on significant cultural resources listed on or considered eligible for listing on the National Register of Historic Places within the Project Area. Horizon therefore recommends that Brazos be allowed to proceed with the development of the Project Area

An Intensive Cultural Resources Survey of American Midstream Partners, LP’s Proposed Ajax UL6-31 Lateral Project Located on UT Land in Andrews and Martin Counties, Texas

On 12 October 2017, Horizon Environmental Services, Inc. (Horizon) conducted an intensive cultural resources survey of American Midstream Partners, LP’s (AMP) proposed Ajax UL6-31 Lateral pipeline right-of-way (ROW) located in northeastern Andrews and northwestern Martin counties, Texas (Project Area). The development of the pipeline ROW will be privately funded and will not require any federal permitting or coordination. However, it is located entirely on land owned by the University of Texas (UT Land). As UT Land is considered to be public property, the undertaking falls under the regulations of the Antiquities Code of Texas (ACT). At the request of Venado Environmental, LLC (Venado), Horizon conducted the cultural resources survey of the Project Area on behalf of AMP in compliance with the ACT. The purpose of the survey was to determine if any archeological sites were located within the Project Area and, if any existed, to determine if the project had the potential to have any adverse impacts on sites considered eligible for formal designation as State Antiquities Landmarks (SALs). The cultural resources survey was conducted under Texas Antiquities Committee (TAC) permit number 8193. The Project Area measures approximately 2.3 miles (3.8 kilometers [km]) long by 100.0 feet (30.5 meters [m]) wide (approximately 27.9 acres). The entire length of the proposed ROW is located on UT Land. The cultural resources survey of the Project Area resulted in entirely negative findings. No cultural materials were observed on the surface of the Project Area or within any of the 35 excavated shovel tests. Based on the negative survey results, it is Horizon’s opinion that the construction of the proposed Ajax UL6-31 Lateral Project across UT Land will have no adverse effect on significant cultural resources designated as or considered eligible for designation as SALs. Horizon therefore recommends that AMP be allowed to proceed with the construction of the proposed pipeline relative to the jurisdiction of the ACT

An Intensive Cultural Resources Survey of the USACE Jurisdictional Areas within Chesapeake Energy Corporation’s Proposed San Lorenzo Creek Bridge ROW in Dimmit County, Texas

On 13 January 2015, Horizon Environmental Services, Inc. (Horizon) conducted an intensive cultural resources survey of the US Army Corps of Engineers (USACE) jurisdictional areas within Chesapeake Energy Corporation’s (Chesapeake) proposed San Lorenzo Creek bridge right-of-way (ROW) in southwestern Dimmit County, Texas (Project Area). Although the Project Area will be located entirely on private property and will be developed with private funds, its construction will require the usage of a Nationwide Permit (NWP) issued by the USACE. As a result, the portions of the undertaking within the USACE’s purview also fall under the regulations of Section 106 of the National Historic Preservation Act (NHPA) of 1966, as amended. Horizon conducted the cultural resources survey of the USACE jurisdictional areas on behalf of Chesapeake in compliance with Section 106 of the NHPA. The purpose of the survey was to determine if any archeological sites were located within the USACE jurisdictional areas and, if any existed, to determine if the project had the potential to have any adverse impacts on sites eligible for inclusion on the National Register of Historic Places (NRHP). The cultural resources survey resulted in the reassessment of a small portion of previously recorded site 41DM190. This site, an extensive prehistoric campsite, was found to possess dense surficial deposits of lithic debris, stone tool fragments, and fire-cracked rock (FCR). It was also found to possess subsurface cultural deposits extending to depths of at least 27.6 inches (70.0 centimeters [cm]) below surface. As Horizon’s investigations were limited to only a small portion of the site and its full horizontal and vertical extent have not been thoroughly assessed, it is Horizon’s opinion that the NRHP eligibility status of site 41DM190 is currently undetermined. Based on the extensive size of the site, previous impacts to the immediate area of the proposed bridge ROW, as well as construction methods that will pose minimal impacts to any cultural deposits contained within the terraces of the site, it is Horizon’s opinion that the construction of the proposed San Lorenzo Creek bridge will have no adverse effect on significant cultural resources listed on or considered eligible for listing on the NRHP within the USACE jurisdictional area. Horizon therefore recommends that Chesapeake be allowed to proceed with the construction of the proposed bridge, relative to the jurisdiction of the USACE and Section 106 of the NHPA

An Intensive Cultural Resources Survey of Anadarko Petroleum Corporation’s Proposed University Lands 19-7 B 2H Well Pad Project in Loving County, Texas

On 19 January 2016, Horizon Environmental Services, Inc. (Horizon) conducted an intensive cultural resources survey of Anadarko Petroleum Corporation’s (Anadarko) proposed University Lands 19-7 B 2H Well Pad Project located in south-central Loving County, Texas (Project Area). The development of the Project Area will be privately funded and will not require any federal permitting or coordination. However, it is located on property owned by the University of Texas (UT). As UT is considered to be a political subdivision of the state, the undertaking falls under the regulations of the Antiquities Code of Texas (ACT). At the request of Whitenton Group, Inc. (Whitenton), Horizon conducted the cultural resources survey of the Project Area on behalf of Anadarko in compliance with the ACT. The purpose of the survey was to determine if any archeological sites were located within the Project Area and, if any existed, to determine if the project had the potential to have any adverse impacts on sites considered eligible for formal designation as State Antiquities Landmarks (SALs). The cultural resources survey was conducted under Texas Antiquities Committee (TAC) permit number 8326. The Project Area consists of: 1) a drill pad measuring 3.4 acres in size; 2) an attached production pad measuring 1.4 acres in size; 3) an attached reserve pit measuring 0.4 acres in size; and 4) an access road totaling 1657.0 feet (505.2 meters [m]) in length and 30.0 feet (9.1 m) wide (1.1 acres). Overall, the Project Area totals approximately 6.3 acres situated entirely on UT Land. The cultural resources survey of the Project Area resulted in entirely negative findings. No cultural materials were observed on the surface of the Project Area or within any of the 17 excavated shovel tests. Based on the negative survey results, it is Horizon’s opinion that the construction of the University Lands 19-7 B 2H Well Pad Project will have no adverse effect on significant cultural resources designated as or considered eligible for designation as SALs. Horizon therefore recommends that Anadarko be allowed to proceed with the construction of the proposed well pad project relative to the jurisdiction of the ACT

An Intensive Cultural Resources Survey of a Rerouted Alignment of Plains All American Pipeline, LP’s Proposed Earthstone Benedum CTP to Tie-In Line Project Located on UT Land in Upton County, Texas

On 30 September 2020, Horizon Environmental Services, Inc. (Horizon) conducted an intensive cultural resources survey of a rerouted alignment of Plains All American Pipeline, LP’s (Plains) proposed Earthstone Benedum CTP to Tie-In Line Right-of-way (ROW) Project located on University of Texas property (UT land) in southeastern Upton County, Texas (Project Area). Overall, the proposed rerouted alignment on UT land measures 3.4 miles (5.5 kilometers [km]) long by 100.0 feet (30.5 meters [m]) wide, with a total area of approximately 41.2 acres. However, as the majority of the rerouted alignment follows the same general path as the original alignment, the Texas Historical Commission (THC) indicated that only the southeasternmost portion of the rerouted alignment where it extends away from the original project terminus would require a cultural resources survey. As such, the new Project Area measured approximately 1.2 miles (1.9 km) long by 100.0 feet (30.5 m) wide within an overall area of approximately 14.5 acres. The cultural resources survey of the Project Area was conducted under Texas Antiquities Committee (TAC) permit number 9616 in compliance with the Antiquities Code of Texas (ACT). The purpose of the survey was to determine if any archeological sites were located within the Project Area and, if any existed, to determine if the project had the potential to have any adverse impacts on sites considered eligible for formal designation as State Antiquities Landmarks (SALs). The cultural resources survey resulted in entirely negative findings. No cultural materials were observed on the surface of the Project Area or within any of the 23 excavated shovel tests. Based on the negative survey results, it is Horizon’s opinion that the construction of the rerouted alignment of the proposed Earthstone Benedum CTP to Tie-In Line Project across UT land will have no adverse effect on significant cultural resources designated as or considered eligible for designation as SALs. Horizon therefore recommends that Plains be allowed to proceed with the construction of the proposed pipeline relative to the jurisdiction of the ACT. All records produced during the investigations have been curated at the Texas Archeological Research Laboratory (TARL) in accordance with the TAC Permit-Terms and Conditions and the Texas Administrative Code Title 13, Part 2, Chapter 26.C.26.17