This is a database of abandoned Uranium mines referred to as the Colorado (BLM) Abandoned Mine Land Inventory database.
The purpose of this data set is to become a part of a growing compendium of abandoned Uranium mine data for the Midwestern and Western United States.
publication date
none
Unknown.
Inconsistencies between county and coordinate information may be suspect.
Complete as per original data source.
Point locations matches quadrangles very well. A high percentage of mines from the EPA data set matched mine name from the quadrangle maps. Point locations generally matching within 100 to 200 meters.
NA
This table was exported from Microsoft Excel to a dbase format.
Unique Identifier, this field is used to identify and join each record in the separate databases, ur2001, and in the Access database.
ICF Consulting, Inc.
Unique BLM identification number.
URS Corporation
This field is 2 characters wide and is the State abbreviation as identified in ORCA data dictionary 1656
BLM
The entry is five spaces in length and is a sequential number within the Resource Area, which is unique for the site.
BLM
Enter the local mine name if known from literature research, knowledge of the area, or mine name given on the topographic map for the mine site. This field is 25 characters in length.
BLM
County name where AML site is located.
BLM
Watershed where AML site is located.
URS Corporation
Enter the State of Utah Abandoned Mine Reclamation number for the site. This field is 11 characters in length.
BLM
The entry is a numeric field with 3 spaces provided. Enter the primary commodity being mined from ORCA Commodity Code Data Dictionary 2303
BLM
UTM zone number.
BLM
AML site coordinate reference.
BLM
AML site coordinate reference.
BLM
Enter the meridian code from ORCA Data Dictionary 1703
BLM
Enter cumulative or total acres of surface disturbance rounded to the nearest tenth excluding the access acreage. Acreage is calculated by multiplying the length by the width of the disturbance due to mining and then dividing by 43,560.
BLM
If there is evidence of recent mineral activity (within the last year) select Y from the menu list. If there is no evidence of recent mineral activity then select N from the menu list. If it is unknown whether there is evidence of recent mineral activity then select U from the menu list.
BLM
Describe the evidence of recent mineral activity observed (e.g., fresh cuts on working face of an open pit, new filled sample bags left behind, fresh drill cuttings, fresh ore pile, etc.).
BLM
Enter the number of open adits found within the site. An adit is a horizontal or nearly horizontal passage (0-10 degrees) from the surface into the mine. Examples of an open adit include when the lock on a gated entry is broken, when the entry has collapsed but there is a crawl space large enough to allow a small child to enter the adit, or when the workings appear to be caved-in 6 to 10 feet from the portal. Fences are not adequate closures for mine openings. Note location(s) of all open adits on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of closed adits found within the site. A closed adit is an adit that restricts the general public from entering the mine or that has been reclaimed. A closed adit may be gated, blasted shut, sealed with concrete blocks, backfilled, etc. Fences are not adequate closures for mine openings. The reason to record the number of closed adits is that it could reopen in the future (e.g., subsidence, earthquake in the area, vandalism, etc.). Note location(s) of all closed adits on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of open inclines found within the site. An incline is a sloped passage (11-65 degrees) from the surface into the mine.
BLM
Enter the number of closed inclines found within the site. A closed incline is an incline that restricts the general public from entering the mine or that has been reclaimed. A closed incline may be gated, blasted shut, sealed with concrete blocks, backfilled, etc. Fences are not adequate closures for mine openings. The reason to record the number of closed inclines is that an incline could reopen in the future (e.g., subsidence, earthquake in the area, vandalism, etc.). Note the location(s) of all closed inclines on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of open shafts within the site. A shaft is a vertical excavation through which a mine is worked (66 to 90 degress). Examples of an open shaft include when debris bridges the shaft 5 to 10 feet down from the collar and/or the collapsed opening cannot be easily climbed, when the grate or other closure method has been vandalized, or when the shaft has been closed by subsidence but there is a crawl space large enough to allow a small child to enter. Fences are not adequate closures for mine openings. Note location(s) of all open shafts on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of closed shafts found within the site. A closed shaft is a shaft that restricts the general public from entering the mine, or that has been reclaimed. A closed shaft may be grated, backfilled, covered, capped, or plugged. The reason to record the number of closed shafts is that it could reopen in the future (e.g., subsidence, earthquake in the area, vandalism, etc.). Note location(s) of all closed shafts on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of stopes found within the mine site. A stope is an underground excavation formed by the removal of ore that has opened to the surface. Note location(s) of all stopes on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of other openings found within the mine site. Other openings are glory holes, ventilation holes, tunnels, drifts, etc. Note location(s) of these openings on the sketch map.
BLM
List the type of other openings counted. This entry is 20 characters long.
BLM
Enter the number of trenches that are greater than 3 feet
BLM
Enter the number of prospects found within the mine site. A prospect is an area that has been explored in a preliminary way but has not given evidence of economic value. A prospect is commonly a shallow excavation (equal to or less than 10 feet deep and less than or equal to 15 feet diameter), or an adit/incline that is less than 5 feet in length. Note location(s) of all prospects on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of open drill holes found within the mine site. A drill hole is a circular hole made by drilling. There are many drilling methods. Three common methods are percussion, rotary, and diamond drill. The equipment may range in size and complexity from simple, hand-operated augers to small-scale versions of the rigs similar to those used in the oil field.
BLM
Enter the number of pits greater than 30 feet deep found within the mine site. A pit is an excavation generally circular in outline, with vertical or nearly vertical walls. Note location(s) of all pits greater than 30 feet deep on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of pits equal to or less than 30 feet deep that occur within the mine site. A pit is an excavation generally circular in outline, with vertical or nearly vertical walls. On the sketch map, use the appropriate symbol from page 6 of the Checklist to depict pit(s). Make a notation to the side of this feature that it is less than 30 feet deep.
BLM
Enter the total circumference of all pit highwalls greater than 10 feet deep
BLM
Enter the number of waste dumps that are less than 0.1 ac in size within the mine site. A waste dump is the area where barren or low-grade material is discarded. This material is usually dumped just beneath the level of the adit portal or shaft collar. In mountainous terrain, where access is difficult, the dumps are usually located in or near stream bottoms. Include ore stockpiles in this entry. Note location(s) of all waste dumps on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of waste dumps that are 0.1 - 5 ac in size within the mine site. A waste dump is defined above under WASDMP_L01. Include ore stockpiles in this entry. Note location(s) of all waste dumps on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of waste dumps that are greater 5 ac in size within the mine site. A waste dump is defined above under WASDMP_01. Include ore stockpiles in this entry. Note location(s) of all waste dumps on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of tailings that are less than .1 ac in size within the mine site. Mine tailings are residual materials after the ore-grade materials have been washed, concentrated, or treated. This material is considered too poor a grade to treat any further. Note location(s) of all tailings on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of tailings that are greater .1 but less than 5 acres in size within the mine site. Mine tailings are defined above under TAILS_l_01. Note location(s) of all tailings on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of tailings that are greater than 5 acres in
BLM
Enter the number of heap leach pads found within the site.
BLM
Number of locations within the site where dredging was used to extract ore. Two methods of dredging are bucket-line and suction. A bucket-line dredge is a dredge in which the material excavated is lifted by a chain of buckets. The bucket-line dredge operates in a pond and, in some cases, is capable of digging more than 100 feet below the water. The machinery is mounted on a shallow-draft hull and the dredge backfills its working pit as it advances. Also known as connected-bucket dredge. A suction dredge is a dredge in which unconsolidated stream-bottom materials are picked up and carried to a gold recovery device, usually riffles. Note location(s) of all dredging areas on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of ponds found within the site. A pond is a man-made surface depression holding a body of water. A pond can be lined or unlined. They can also contain fresh water, pregnant solution, or barren solution. Note location(s) of all ponds on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of dams found within the site. A dam is a man-made feature constructed to create a pond for storage of water, divert water from a watercourse into a conduit, or channel or create a hydraulic head that can be used to generate power at the mill. Note location(s) of all dams on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of mills found within the site. Note location(s) of all mill sites on the sketch map using the symbol for structures on page 6 of the Checklist with an M inside the symbol.
BLM
Enter the appropriate number(s) for the type of mill or mills found on the mine site. The numbering convention for the types of mills found at the site is given below. If there are multiple mills at the site they are enter sequentially with no spaces nor commas between entries.
BLM
Enter the number of locations where mining equipment or machinery has been left or stored on the site. Note location(s) of all mining equipment or machinery on the sketch map using the directions on the lower right side of page 6 of the Checklist.
BLM
Enter the number of headframes found within the site area. A headframe is a steel or wood frame at the top of a shaft which carries the pulley for the hoist. Note location(s) of headframes on the sketch map using the symbol for structures on page 6 of the Checklist with a H inside the symbol.
BLM
Enter the number of trestles and tramways found within the site. A trestle is a framework of timbers, piles, or steelwork for carrying a railroad over a depression. A tramway can be either a suspended cable system used to transport ore or waste in suspended buckets or it can be a roadway having plates or rails on which wheeled-vehicles run. Note location(s) of trestles/tramways on the sketch map using the symbol for structures on page 6 of the Checklist with a T inside the symbol.
BLM
Enter the number of powerlines found within the site. Powerlines would be used to bring electrical power to the mining operation. These may be aviation hazards. Note location(s) of the powerlines on the sketch map using the appropriate symbol from page 6 of the Checklist.
BLM
Enter the number of other structures that occur within the site. All abandoned structures except for mills, headframes, and trestles/tramways are counted and recorded under this heading. Typical structures found at mining operations: garage for maintenance of vehicles, night watchman's quarters, bunkhouse, tool shed, outhouse, etc. This category includes concrete foundations. Note location(s) of structures on the sketch map using the appropriate symbol on page 6.
BLM
Describe what the other structures were used for if known.
BLM
Enter the number of structures used as a homesite within the site. A homesite is a structure that is used as living quarters and is currently being occupied. Note the location(s) of all homesites on the sketch map.
BLM
Enter feature found on the site which is not described above.
BLM
Tailings are washed or milled ore that is too poor a grade to be treated further. Select from the menu options the appropriate description of the tailings configuration. The options provided are Confined, Unconfined, or Unknown. Confined tailings are tailings that are bound above and below and are, therefore, held in place (e.g., tailings pond, tailings dam, etc.). Unconfined tailings are tailings that are deposited on the surface with no intent of restricting where they flow or tailings which have become unrestricted due to erosion or other causes. Unknown is if the inspector is unsure as to whether the tailings are confined or unconfined. NONE is if the inspector is sure there are no tailings present at the site.
BLM
Enter the number of water samples taken for analysis.
BLM
Background is the overall reading of the ore host rock formation of the area being investigated. Enter the background gamma reading in milliroentgen per hour.
BLM
Enter the highest gamma reading taken for all the adits and inclines within the site.
BLM
Enter the corresponding working level reading for the adit or incline recorded above under ADIT_RAD.
BLM
Enter the highest gamma reading taken for all the shafts for all the shafts within the mine site.
BLM
Enter the corresponding working level reading for the shaft recorded above under SHAFT_RAD.
BLM
Enter the highest gamma reading taken for all the other features found within the mine site.
BLM
Enter the corresponding working level reading for the other feature recorded above under OTHER_RAD.
BLM
The datalogger will automatically generate the date the information is collected in the field.
BLM
Federal Information Processing Standards Code
URS Corporation
Date record was created in database.
URS Corporation
User name or process by which the record was added to the database.
URS Corporation
A numeric reference to identify each record with its original database.
ICF Consulting, Inc.
db2: Colorado (BLM) Abandoned Mine Land Inventory
URS/Techlaw
internal ID field
ICF Consulting, Inc.
7500 N. Dreamy Draw Drive Suite 145