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Northfield Partners, LLC <br />Northfield Fxploratton Project <br />BASELINE HYDROLOGY MONITORING PLAN -SUPPLEMENTAL INFORMATION <br />Response: <br />The two ponds aze used for temporary storage of irrigation water according the landowner. Water <br />is supplied to the ponds, from a water source approximately 1 '/z miles to the northwest, via a 12 <br />inch diameter pipe. The~ponds have not been used for several yeazs due to a break in the supply <br />pipe. <br />Field observations confirmed that the natural drainage southwest of the ponds flows azound the <br />ponds and enters the Fawn Hollow drainage. Surface runoff entering the ponds originates only <br />from the limited hillside azea directly south of the ponds. <br />Additional Baseline Hydrologic Information <br />A spring/seep was found approximately 900 feet southeast of the Section 12 (S 12-SP) <br />spring/seep monitoring location while monitoring S 12-SP on June 22, 2005. This spring seep <br />flows from a 4 feet diameter culvert originating in the side of a hill. A conversation with the <br />landowner (Carlsson) provided the further details. Cazlsson explained that the culvert is situated <br />at the location of an abandoned coal mine portal. In 1984, the portal azea collapsed accompanied <br />by a significant dischazge of water from the old mine works. Soon after the event, the State of <br />Colorado stabilized the portal azea and placed the section of culvert in the mine opening to allow <br />water drainage. Since that time, water has continued to flow from the culvert except during some <br />recent dry weather periods. <br />Northfield has reseazched mining records and determined that the referenced portal is part of the <br />Golden Quality No. 3 Mine portal azea. The No. 3 Mine is connected to the Golden Quality No. <br />2/ Chandler Creek/Griffiths coal mine complex. These workings aze primarily in the Ocean <br />Wave coal seam. <br />The Plan explains that the source of water for the S 12-SP spring/seep is from the same above <br />mine complex. Northfield will proceed to sample flows from both spring/seep areas in order to <br />determine if the groundwater source is the same. If Northfield determines that the water source is <br />similaz, then only one of the two spring/seep locations will then be monitored for baseline <br />hydrologic data. <br />- 4 - 06/30/05 <br />