MMG Metalline Mining Company Common Stock

COEUR D'ALENE, Idaho, Nov. 21 /PRNewswire-FirstCall/ -- Metalline Mining Company (AMEX:MMG) announced the status of its current drilling at the Sierra Mojada Project, Coahuila, Mexico. During the first part of 2007, from January through mid-April, Metalline conducted a program of diamond drilling in the western part of the San Salvador mine with the principal objective of evaluating relatively shallow silver mineralization in that area. A parallel program of longhole drilling was conducted from old workings elsewhere on our concessions where preliminary sampling had indicated silver mineralization. Longhole sampling uses percussion drills mounted on hydraulic supports ("jacklegs") to obtain samples at distances of 10 to 20m outward from old mine workings. Total core drilling during this period was 2074 meters and longhole drilling added 2981m of samples. A large number of longhole samples returned encouraging silver values and several exploration targets were defined for future drill testing. Some of these targets have been drilled, but as discussed below, we have no assay results from these holes. One of the more interesting holes from drilling into the area to the west of the San Salvador shaft was drill hole D1061106. This hole was drilled from a drill base adjacent to the shaft on the 3 level of the San Salvador mine, approximately located at UTM coordinates 631,466E; 3,017,102N; elevation 1395 meters. The hole was oriented on an azimuth of 300 degrees and on a +25 degree dip. Between 38 and 43 m, the hole crossed a 5 meter zone that averaged 347 gm/tonne silver (11.1 ounce/tonne) and 0.55% Cu. A 95 m interval between 84 and 179m averaged 166 gm/tonne silver (5.3 ounce/tonne) and 0.16% copper. Within this zone, the 40 meter interval from 90 to 130m averaged 229 gm/tonne silver (7.3 oz/tonne) and 0.2% copper. The zinc and lead content of all of these intercepts is economically insignificant. The true thickness of the zone is unknown. The mineralized intercept is within 100 meters of the surface in this area. Analytical results will be posted on the Metalline web site in the news releases section (http://www.metalin.com/news_release.html). This work came to a halt in mid-April when the geotechnical drilling program began, but after geotechnical drilling was completed in early August, diamond drilling was resumed from drill bases in the Encantada mine. We are currently operating two drills on a double shift basis, and have drilled 3194.55 m in the period 9 August through 10 November. Part of that drilling was for training new operators using our smaller Termite drills. We have processed and shipped pulps for assay on 2372 core samples and 124 longhole samples, representing about 2620 meters of samples, during the period since early October. Unfortunately it is currently taking more than 6 weeks for shipments from Mexico to reach our commercial laboratory in Vancouver, and none of the samples that have reached the laboratory have yet advanced to begin analysis. We do not know how long it will be before we have assay results from the samples that have been shipped, but we anticipate a flow time of at least 8-10 weeks from the time we ship samples until we receive results. Indications are that the normal winter season reduction in mining exploration activity in Mexico is not occurring this year and that the pace of external activity may even be accelerating. We had anticipated many of these developments and implemented a plan in early 2007 to deal with the difficulties. During the pause in normal drilling activities for geotechnical drilling, a major upgrade of our sample preparation laboratory was performed. This improved both equipment and facilities as recommended by our consultants. This project was largely completed by late August. We placed orders for two addition drills, an additional Onram 1000 in March and an improved Termite in April. The Onram arrived at the Mexican border in late October but had been damaged in transit by the shipping company and was returned to the manufacturer for inspection and repair. The improved Termite is at the border awaiting import. We have trained crews to operate for all four drills (two Onram 1000 and two Termites) on a double shift basis. Suppliers of drill rod, drill bits, and drilling supplies are failing to meet their delivery commitments, with slides in delivery dates on the order of many months, but we have adequate supplies on hand to put all of our drills in operation. When logging core at Sierra Mojada it is not possible to visually estimate the grade of silver mineralization. Silver assays are vital to using the results of previous drilling to direct new holes. A delay of 8-10 weeks is unacceptably long for this purpose. We recognized this limitation early in the year and began construction of an on-site chemistry laboratory capable of giving us assays to screen our samples and provide timely feedback to operations. We have just completed installation of a Varian model 240-FS atomic adsorption spectrophotometer (AA unit) and are completing fume hood and sample digestion facilities in the laboratory. The technicians have completed training on the AA unit and will be perfecting laboratory procedures using our standard sample suite. We expect to have the analytical laboratory in production by the first of the year. Drilling continues with two objectives. The primary objective is to resolve issues raised by our engineers and consultants in completion of the feasibility study on the oxide zinc mineralization. This includes providing "piercing points" that better define the top of the mineralized zone, increasing confidence in some areas where more data points are required, and refining knowledge of the geology and orebody continuity adjacent to major faults. The second objective is to provide additional data on silver mineralization so that a resource model can be constructed for silver. About the Company Metalline Mining Company is an exploration stage enterprise engaged in the business of mining. The Company currently owns mining concessions in the municipality of Sierra Mojada, Coahuila, Mexico. The Company conducts its operations in Mexico through its wholly owned Mexican subsidiaries, Minera Metalin S.A. de C.V. and Contratistas de Sierra Mojada S.A. de C.V. To obtain more information on Metalline Mining Company, visit the Company's web site (http://www.metalin.com/). Forward-Looking Statements This news release contains forward-looking statements regarding future events and Metalline's future results that are subject to the safe harbors created under the Securities Act of 1933 (the "Securities Act") and the Securities Exchange Act of 1934 (the "Exchange Act"). These statements are based on current expectations, estimates, forecasts, and projections about the industry in which Metalline operates and the beliefs and assumptions of Metalline's management. Words such as "expects," "anticipates," "targets," "goals," "projects," "intends," "plans," "believes," "seeks," "estimates," "continues," "may," variations of such words, and similar expressions, are intended to identify such forward-looking statements. In addition, any statements that refer to projections of Metalline's future financial performance, Metalline's anticipated growth and potentials in its business and other characterizations of future events or circumstances are forward-looking statements. Readers are cautioned that these forward-looking statements are only predictions and are subject to risks, uncertainties, and assumptions that are difficult to predict, including those identified elsewhere herein and Metalline's Annual Report on Form 10-KSB for the fiscal year ended October 31, 2006 under "Risk Factors." Therefore, actual results may differ materially and adversely from those expressed in any forward-looking statements. Metalline undertakes no obligation to revise or update any forward-looking statements for any reason. DATASOURCE: Metalline Mining Company CONTACT: Metalline Mining Company, +1-208-665-2002, fax, +1-208-665-0041, Web site: http://www.metalin.com/

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