| | AL_NORTHCENTRAL_B26_H | MERRICK-SURDEX JOINT VENTURE LLP | $287,332 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Jun 1, 2026 | Jun 1, 2026 | Oct 31, 2028 |
| | NE_SOUTHERN_D26 | MERRICK-SURDEX JOINT VENTURE LLP | $3,999,887 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | May 21, 2026 | May 21, 2026 | Jun 30, 2029 |
| | MO_SOUTHWESTCOUNTIES_B26 | MERRICK-SURDEX JOINT VENTURE LLP | $354,413 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Feb 19, 2026 | Feb 19, 2026 | May 30, 2028 |
| | MO_SOUTHCENTRAL_B25 | MERRICK-SURDEX JOINT VENTURE LLP | $3,726,884 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Sep 15, 2025 | Sep 15, 2025 | Nov 30, 2028 |
| | AK_ILIAMNA_D25_H | MERRICK-SURDEX JOINT VENTURE LLP | $1,387,962 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Sep 11, 2025 | Sep 12, 2025 | Dec 31, 2028 |
| | OR_BLUE MOUNTAINS_MAG_RAD_D25 | MERRICK-SURDEX JOINT VENTURE LLP | $1,966,145 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Aug 13, 2025 | Aug 13, 2025 | Feb 1, 2028 |
| | MT_PORPHYRYBELT_MAG_RAD_D25 | MERRICK-SURDEX JOINT VENTURE LLP | $6,068,425 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Aug 5, 2025 | Aug 5, 2025 | May 31, 2028 |
| | GA_HURRICANEHELENE_D25 | MERRICK-SURDEX JOINT VENTURE LLP | $2,264,666 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Jun 6, 2025 | Jun 6, 2025 | Oct 31, 2027 |
| | KS_3COUNTYDUALSENSOR_D25 | MERRICK-SURDEX JOINT VENTURE LLP | $523,978 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Jun 6, 2025 | Jun 6, 2025 | Apr 30, 2028 |
| | AL_12COUNTY_D25 | MERRICK-SURDEX JOINT VENTURE LLP | $2,399,554 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Apr 17, 2025 | Apr 17, 2025 | Jun 30, 2028 |
| | IL_22COUNTY_D25 | MERRICK-SURDEX JOINT VENTURE LLP | $2,628,263 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Jan 22, 2025 | Jan 22, 2025 | Jul 31, 2027 |
| | AL_19COUNTY_B24 | MERRICK-SURDEX JOINT VENTURE LLP | $2,955,379 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Aug 19, 2024 | Aug 19, 2024 | Mar 30, 2027 |
| | GA_9COUNTY_D24 | MERRICK-SURDEX JOINT VENTURE LLP | $711,717 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Jul 9, 2024 | Jul 9, 2024 | Mar 30, 2027 |
| | AK_TOGIAK_D24_H | MERRICK-SURDEX JOINT VENTURE LLP | $890,876 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Jul 6, 2024 | Jul 6, 2024 | Sep 30, 2027 |
| | WY_LARAMIEMOUNTAINS_MAG_RAD_D24 | MERRICK-SURDEX JOINT VENTURE LLP | $2,810,394 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Jun 27, 2024 | Jun 27, 2024 | Dec 15, 2026 |
| | IL_19COUNTY_D24 | MERRICK-SURDEX JOINT VENTURE LLP | $2,363,370 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | May 29, 2024 | May 29, 2024 | Feb 28, 2027 |
| | NM_USFSENCHANTEDCIRCLE_D24 | MERRICK-SURDEX JOINT VENTURE LLP | $669,448 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Apr 24, 2024 | Apr 24, 2024 | Nov 30, 2026 |
| | MO_SE11COUNTY_B24 | MERRICK-SURDEX JOINT VENTURE LLP | $1,550,032 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Mar 7, 2024 | Mar 7, 2024 | Aug 30, 2026 |
| | NE_STATEWIDE_D23 | MERRICK-SURDEX JOINT VENTURE LLP | $5,994,539 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Sep 6, 2023 | Sep 7, 2023 | Dec 1, 2025 |
| | UT_IRONAXISPIOCHE_MAG_RAD_D23 | MERRICK-SURDEX JOINT VENTURE LLP | $1,619,164 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Aug 16, 2023 | Aug 17, 2023 | Nov 22, 2025 |
| | CO_DUALSENSOREVAL_ORTHOLIDAR_D23 | MERRICK-SURDEX JOINT VENTURE LLP | $107,322 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Aug 15, 2023 | Aug 15, 2023 | Sep 30, 2025 |
| | NE_OUTLETTURKEYCREEK_D23_H | MERRICK-SURDEX JOINT VENTURE LLP | $67,911 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Aug 15, 2023 | Aug 2, 2023 | Jan 31, 2026 |
| | IL_10COUNTYNRCS_D23 | MERRICK-SURDEX JOINT VENTURE LLP | $1,685,960 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Jun 6, 2023 | May 18, 2023 | Jul 31, 2026 |
| | AZ_SOUTHWEST_D23 | MERRICK-SURDEX JOINT VENTURE LLP | $2,885,686 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | May 16, 2023 | May 16, 2023 | Nov 30, 2025 |
| | AK_LOWERNUSHAGAK_D23_H | MERRICK-SURDEX JOINT VENTURE LLP | $530,911 | US GEOLOGICAL SURVEY | US GEOLOGICAL SURVEY | — | 541360Geophysical Surveying and Mapping Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Apr 27, 2023 | May 1, 2023 | Dec 31, 2026 |