Digital database of selected aggregate and related resources in Ada, Boise, Canyon, Elmore, Gem, and Owyhee counties, southwestern Idaho

UTM coordinates were verified by comparing source tabular data to our Site locations as they were displayed in our ArcView 3.2 GIS. Site locations are considered to be accurate to within 1320 feet (1/4 mile). Location data from USGS, unpub. data, 2003 was determined by GPS and are considered to be accurate to within 50 feet.

Location and geotechnical data from unpublished Idaho Transportation Department hardcopy records.

BLM spatial database was used to identify surface ownership, also known as land status, of 680 material source sites.

These Digital Line Graphs (DLG's) provided road and stream data for ArcView map layouts.

These data (polygons) provided a boundary of the Snake River Birds of Prey National Conservation Area for ArcView map layouts.

These data provided county boundaries for Arcview map layouts.

Used Digital Raster Graphic (DRG) in ArcView 3.2 to correlate each material source site location description of township-range-section to its corresponding UTM location on the appropriate DRG.

These data provided additional material source site locations and geotechnical data to the database.

These data provided additional material source site location and geotechnical data to the database.

These data provided additional site locations and geotechnical data to the database.

These data provided a list of aggregate material types (base, concrete, &/or plantmix) of ITD qualified producers.

These data provided geologic unit descriptions to polygons that were used from Othberg and Stanford, 1993.

(1998 - 2000) Idaho Transportation Department source records were researched and compiled by Phillip Moyle, USGS, and Rikka Bothun, student. Other students from University of Arizona entered sample location information (containing spatial data) and geotechnical information into two separate Microsoft Excel tables. These two tables would later be "joined" together in a "many to one" operation in ArcView 3.2.

(2002 - 2003) Phillip Moyle and John Wallis reviewed the preliminary spatial and geotechnical data tables, made revisions as necessary, and added additional qualitative and quantitative ITD data. Additional sample location and/or geotechnical data from Army Corps of Engineers (ACE), Bureau of Land Management (BLM), and the U.S. Geological Survey (USGS) were also added to the data set.
In order to provide a dBASE4 file as the final product of this GIS, the following steps were used in the compilation process of the digital tabular data of this dataset. Two preliminary tables (spatial and geotechnical data) were compiled in Microsoft Excel. The spatial and geotechnical data tables were saved as Tab-delimited text files for easy import into ArcView 3.2. The spatial data were then "joined" to the geotechnical data in a "many to one" procedure using the Site_Id as the common field. A shapefile was created from the "joined" table producing a preliminary dBASE4 file. After some organizational changes, the final dBASE4 file was produced (of2004-1067.dbf).

(2003) ArcView query was used to identify polygons (geologic units) that have point locations (material source sites) within them. This geologic coverage encompasses only a small portion of the study area and therefore not all material source sites are assigned a geologic unit name. Once identified, the geologic units were added to the database to provide additional qualitative information to each material source site located within a geologic polygon.

(2003) ArcView query was used to identify polygons (land ownership) that have point locations (material source sites) within them. Once identified, the land ownership status types were added to the database (of2004-1067.dbf) to provide additional qualitative information to each material source site. Originally the land ownership coverage was larger than the study area. In order to eliminate unnecessary data, the land ownership was "clipped" to include only the 6 county study area of southwest Idaho.

(2003) In ArcView 3.2 UTM coordinates were determined by correlating material source site township-range-section data with its associated UTM location on a Digital Raster Graphic (DRG). In ArcView the cursor was placed over the described location on the DRG and UTM coordinates were then annotated from the on-screen display into the database (of2004-1067.dbf). UTM coordinates are considered to be accurate to within 1320 feet (1/4 mile).

(2003) Latitude and longitude were determined by importing a copy of the preliminary database into Arcview 3.2 and reprojecting it from UTM NAD 1927, zone 11 to decimal degree Geographic Coordinate System. Then ArcView script addxycoo.ave (ESRI) was run on the database to append decimal lat/lon coordinates to each material source site in the database. The lat/lon coordinates were then annotated into the database (of2004-1067.dbf).

(2003) Road and river spatial data files for each of the 16 DLGs were merged into two (road and river) files. Next, each file was "clipped" to match the geographical extent of our six county study area that greatly reduced file size. The merged-clipped river and roads were used in ArcView map layouts.

Metadata imported.

Metadata imported.

Metadata imported.

Internal feature number.

ESRI

Unique identification number assigned by U.S. Geological Survey (USGS) to identify the various material source sites.  Since most of the material source data were derived from Idaho Transportation Department (ITD) records, naming nomenclature for that agency was selected as the standard for their site records.  In the ITD system, the first two letters designate the county (OW = Owyhee, EL = Elmore, BO = Boise, GM = Gem, AD = Ada, CN =Canyon), and a 4-digit number designates the site, generally in chronological sequence.  For example, BO-0001 is a depleted ITD sand and gravel pit that first operated in 1935.  Material source site data from other agencies, for instance, the Army Corp of Engineers (ACE), Bureau of Land Management (BLM) or USGS, were each assigned an alphanumeric (county-number) sequence so long as it did not conflict with the established ITD system.  USGS sites were labeled with a two-letter county code followed by a number in the 5000 range, ACE sites were labeled with a two-letter county code followed by a number in the 6000 range, and Bureau of Land Management (BLM) sites were labeled with a two-letter county code followed by a number in the 7000 range.

User Defined

Six types of sites were identified.  Two broad classifications - "sand & gravel" or "rock quarry" - were assigned by the compilers to reflect material of either alluvial origin (sand & gravel, lacustrine clay, etc.) or in-place rock (quarry rock).  Also recognized were four less common types of sites - "placer tailings," "mine waste rock," "cinder quarry," and "talus" - that did not fit easily into the two broad classifications.  Placer tailings, or dredge tailings, are alluvial materials that have been disturbed by mining in search of gold or other heavy metals, and mine waste rock is a product of surface or underground mining of in-place rock for valuable minerals or metals.  A question mark "?" follows the type of site name if the classification is uncertain.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1990; BLM,unpub. data, 2003

County in which material source site is reported to occur - Ada, Boise, Canyon, Elmore, Gem, & Owyhee.

ITD, unpub. data, 2002; ACE, 1990; BLM, unpub. data, 2003; USGS, unpub. data, 2003; IDWR, 1990

Private, state, BLM, FS, or other designation of surface ownership based on BLM spatial database acquired from Geographic Sciences at the BLM Idaho State Office, 1387 S. Vinnell Way, Boise, ID 83709 through a data sharing agreement (BLM Memorandum of Understanding ID-423).  Ownership of mineral estate is not available at this time.   In addition, any material source sites that are within the boundaries of the Snake River Birds of Prey National Conservation Area are noted by the acronym "SRBPNCA" in the field.

BLM, unpub. data, 2003

The Idaho Transportation Department (ITD) assigns one of three classifications - Active (A), Inactive (I), or Depleted (D) - to each material source record.  In general, the status reflects the currency or importance of the site, either "Active" or "Inactive," or whether it is determined that the site lacks material resources, "Depleted."  Status may change if ITD has renewed need for aggregate resources from a long-inactive site or discovers additional resources at a site previously classed as depleted.

IDT, unpub. data, 2002

Local name of material source; generally an informal name reflecting a local geographic feature, the name of the operator or landowner, or a name assigned by the administering agency.  NR is entered into the field if a name is not known or reported in the records.

ITD, unpub. data, 2002; ACE, 1990; BLM, unpub. data, 2003; USGS, unpub. data, 2003

This site/company meets standards to be included in the Idaho Transportation Department (ITD) Qualified Aggregate Materials Supplier List for ITD projects:  Base (base material); Concrete; and/or Plantmix. This list is frequently updated by ITD and is considered accurate only as of October 1, 2003.

ITD, unpub. data, 2002

Listed by Idaho Transportation Department as a Qualified Aggregate Materials Supplier for the indicated aggregate - Base, Concrete, &/or Plantmix - until expiration of the term.

ITD, unpub. data, 2003

Expiration date for inclusion on the Idaho Transportation Department list of Qualified Aggregate Materials Suppliers.  Maximum time is two years before renewal is required.

ITD, unpub. data, 2002

Geologic descriptions/terms, found in the agency file or geotechnical laboratory report, that describe the types of rocks or minerals observed at the material source site or in the sample(s).

ITD, unpub. data, 2002, ACE, 1990; USGS, unpub. data, 2003; BLM, unpub. data, 2003

Geologic unit on which the material site is shown to occur only for those sites in the area covered by Othberg and Stanford's (1992, 1993) mapping of the Boise River Valley.  Geologic unit codes for polygons were taken from Othberg and Stanford (1993), and geologic names and unit thicknesses were taken from Othberg and Stanford (1992).  A blank field indicates that the site is outside of the area mapped and reported by Othberg and Stanford.

Othberg and Stanford, (1992,1993)

Earliest production date known for site (as described in the material source record).

ITD, unpub. data, 2002; ACE, 1990

Resource estimate (volume in cubic yards) as reported in the material source record; rounded to two significant figures.

ITD, unpub. data, 2002

Resource estimate (weight in tons) as reported in the material source record; rounded to two significant figures.

ITD, unpub. data, 2002

Terms that describe the geologic or physiographic unit that hosts the source material as reported in the material source record.  For instance, site AD-0012 is in the Boise River sand and gravel, whereas BO-0023 consists of placer (or dredge) tailings.

ITD, unpub. data, 2002, ACE, 1990; USGS, unpub. data, 2003; BLM, unpub. data, 2003

The number of samples from the material source for which geotechnical data are reported in the geotechnical data set.

The primary agency that provided the material source data.  Most of the material source data in this database were derived from ITD records maintained at the District 3 Office (8150 Chinden Blvd., Garden City, ID 83707).  Other sources included the BLM Lower Snake River District (3948 Development Avenue, Boise, ID 83705), an ACE technical report (1990), and USGS field and project notes (Phillip R. Moyle, Spokane Field Office, 904 W. Riverside Ave., Rm. 202, Spokane, WA  99201).

ITD, unpub. data, 2002, ACE, 1990; USGS, unpub. data, 2003; BLM, unpub. data, 2003

Alpha-numeric identifier assigned by agency providing material source data.  Agency numbers include (see Agency):  Idaho Transportation Department (ITD) source number, for instance "AD-1"  for Ada County site number 1, were assigned by county and sequence number; Bureau of Land Management (BLM) permit numbers, for instance "IDI-034214," were assigned in sequence; Army Corps of Engineers (ACE) source numbers, for instance "ACE BO 1 (rev)," were assigned in sequence by 1:100,000 quadrangle map and county; and U.S. Geological Survey (USGS)  source numbers, for instance "GS-99.01," were assigned by year and sequence.

ITD, unpub. data, 2002, ACE, 1990; USGS, unpub. data, 2003; BLM, unpub. data, 2003

Does the agency's material source record contain a CAD or other digital map, yes (Y) or no (N)?

ITD, unpub. data, 2002

Alpha-numeric identifier assigned by land administering agency permitting use of the site as a material source and/or the agency approving a reclamation plan.  May be federal, state, or local permit number; for example, a Bureau of Land Management (BLM) Free Use Permit (FUP) or Right-of-Way (ROW), a Forest Service (FS) Special Use Permit (SUP), or an Idaho Department of Lands (IDL) reclamation permit for state or private lands.  Idaho Transportation Department (ITD) source sites owned by them are labeled as "ITD owned."  Assigned numbers are subject to change as permits are periodically revised or renewed.  Information is presented in this column as it appears in the agency source record, thus it may not list the administering agency.  In addition, permit numbers were often not recorded in the agency material source record.

ITD, unpub. data, 2002

Alpha-numeric tracking code assigned by the Idaho Department of Lands (IDL), the state agency that reviews and approves reclamation plans for mine sites.  For example, site BO-0048 is assigned reclamation plan number RP-549. These numbers are subject to change as plans are periodically revised or renewed.  Many of the agency material source records did not report the IDL reclamation number.

ITD, unpub. data, 2002

Date Idaho Department of Lands reclamation plan approved as reported in the agency material source record.

ITD, unpub. data, 2002

Number of acres occupied by the site based on agency file (rounded to nearest whole acre).

ITD, unpub data, 2002; BLM, unpub. data, 2003

Name of USGS 7.5-minute topographic quadrangle map covering the area in which the material source is located.

USGS DRGs

U.S. Geological Survey identifier code for the 7.5-minute topographic quadrangle map Digital Raster Graphic (DRG) image (see Quad Map Name above).  The alphanumeric identifier is a composite of the latitude and longitude degrees followed by a letter (A-H) and a number (1-8), which provide the grid location of the map.  For instance, the identifier (43116E2) for the Boise South 7.5-minute topographic quadrangle map, which covers the area that includes material source site AD-0003, represents grid location E, the fifth quadrangle map north of, 2, second quadrangle map west of, the coordinate 43 degrees north and 116 degrees east.

USGS DRGs

Public land survey - township number north (N) or south (S) of Boise Baseline - as reported in the material source record or as determined by the compilers based on general location information in the material source record.  If property overlaps multiple townships, it is indicated by a semicolon separating multiple entries, for instance 2S; 3S.

ITD, unpub. data, 2002; ACE, 1990; BLM, unpub. data 2003; USGS, unpub. data, 2003

Public land survey - range number east (E) or west (W) of Boise Meridian - as reported in the material source record or as determined by the compilers based on general location information in the material source record.  If property overlaps multiple ranges, it is indicated by a semicolon separating multiple entries, for instance 2E; 3E.

ITD, unpub. data, 2002; ACE, 1990; BLM, unpub. data 2003; USGS, unpub. data, 2003

Public land survey - number of the section in which the majority of the material site is located - as reported in the material source record or as determined by the compilers based on general location information in the material source record.  If property overlaps multiple sections, it is indicated by a semicolon separating multiple entries, for instance 17; 18.

ITD, unpub. data, 2002; ACE, 1990; BLM, unpub. data 2003; USGS, unpub. data, 2003

Public land survey - portion(s) of section (called alloquate by the BLM) that host the material source - as reported in the material source record or as determined by the compilers based on general location information in the material source record.  Descriptive terms used include:  N, north; S, south; E, east; W, west; C, center; NW, northwest; SW, southwest; NE, northeast; and SE, southeast.  These terms may be used in sequences to describe, from smallest, the portion(s) of a section included in the material source site.  Multiple parcels in a section are separated by commas (for instance NWSW, SWNW), and parcels in multiple sections are separated by a semicolon.

ITD, unpub. data, 2002; ACE, 1990; BLM, unpub. data 2003; USGS, unpub. data, 2003

Distance in meters east (E) on the Universal Transverse Mercator (UTM) grid, North American Datum (NAD) 1927 Zone 11, determined in ArcView 3.2 by compilers.

USGS DRGs

Distance in meters north (N) on the Universal Transverse Mercator (UTM) grid, North American Datum (NAD) 1927 Zone 11, determined in ArcView 3.2 by compilers.

USGS DRGs

Longitude calculated with ESRI ArcView script (addxycoo.ave) using UTM NAD 27 Zone 11.

ESRI

Latitude calculated with ESRI ArcView script (addxycoo.ave) using UTM NAD 27 Zone 11.

ESRI

Additional information on the site location or qualifiers on selection of the UTM of the material source site; for example whether the location assignment was based on a PLS description, a map, or merely the center point of a described parcel or section.  May also contain selected information about material use.

User defined text field.

An alphanumeric identifier assigned by the geotechnical laboratory to each sample as it is submitted for analysis.  Laboratory numbers were entered into the database as reported in the material source record.  Some duplication of laboratory numbers occurred because data in the material source records are from a variety of laboratories reporting on analyses conducted from the 1930s to the late 1990s.  In the event of duplicate lab numbers, the number was modified by addition of sequential letters, for instance, A, B, etc., to distinguish the samples for data sorting purposes.

ITD, unpub. data, 2002, ACE, 1990; USGS, unpub. data, 2003; BLM, unpub. data, 2003

General location of the sample taken, for example:  pit, pit face, stockpile, or auger hole, from which the sample was collected at the material source (as described in the material source records). Sample location IDs contain many different acronyms such as: TP, Tr, AH, Bor, DLH and many others. The meaning of these are uncertain or unknown, but were considered useful and included in this dataset.

ITD, unpub. data, 2002, ACE, 1990; USGS, unpub. data, 2003

Volume of material represented by sample, reported in cubic yards (as described in the material source record).  These numbers were often duplicated on a series of analytical reports from the same site suggesting that the number may represent the estimated resource for the site rather than the volume (or weight) represented by the sample.  However, very little correlation was found to occur between the site resource estimate and the sample volume (or weight).

ITD, unpub. data, 2002

Weight of material represented by sample, reported in tons (as described geotechnical analysis report).  These numbers were often duplicated on a series of analytical reports from the same site suggesting that the number may represent the estimated resource for the site rather than the volume (or weight) represented by the sample.  However, very little correlation was found to occur between the site resource estimate and the sample volume (or weight).

ITD, unpub. data, 2002

Material type such as sand, gravel, borrow, soil that was collected and analyzed by the geotechnical laboratory. This field contains over 150 of different types of material descriptions taken directly from ITD field notes and many of their attributes are ambiguous, uncertain or unknown. However, these data are considered useful in the dataset.

ITD, unpub. data, 2002, ACE, 1990; USGS, unpub. data, 2003

Date on the geotechnical sample analysis report.  At various times and on various records, this represented the date of collection, the date submitted to the lab, or the date on which analyses began or were completed.  The compilers selected the earliest date reported for each sample for which a date was available.

ITD, unpub. data, 2002; USGS, unpub. data, 2003

Top of sample (depth) interval reported in feet (as reported in the material source record).

ITD, unpub. data, 2002; USGS, unpub. data, 2003

Bottom of sample (depth) interval reported in feet (as reported in the material source record).

ITD, unpub. data, 2002; USGS, unpub. data, 2003

The weight percent of aggregate grains passing through 6 inch sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003

The weight percent of aggregate grains passing through 4 inch sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1990

The weight percent of aggregate grains passing through 3 inch sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through 2.5 inch sieve.

ITD, unpub. data, 2002

The weight percent of aggregate grains passing through 2 inch sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through 1.5 inch sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through 1 inch sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through 3/4 inch sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through 5/8 inch sieve.

ITD, unpub. data, 2002

The weight percent of aggregate grains passing through 1/2 inch sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through 3/8 inch sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through 1/4 inch sieve.

ITD, unpub. data, 2002

The weight percent of aggregate grains passing through NO. 4 sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through NO. 6 sieve.

ITD, unpub. data, 2002

The weight percent of aggregate grains passing through NO. 8 sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through NO. 10 sieve.

ITD, unpub. data, 2002

The weight percent of aggregate grains passing through NO. 16 sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through NO. 20 sieve.

ITD, unpub. data, 2002

The weight percent of aggregate grains passing through NO. 30 sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through NO. 40 sieve.

ITD, unpub. data, 2002

The weight percent of aggregate grains passing through NO. 50 sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through NO. 100 sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The weight percent of aggregate grains passing through NO. 200 sieve.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

The sand equivalent (SE) test, conducted according to AASHTO T-176 or ASTM D 2419 standards, measures the relative proportion of plastic fines and dust to sand size particles in granular soil and fine aggregate that pass the No. 4 sieve.  Sand equivalent expresses the concept that most granular soil and fine aggregate are mixtures of desirable coarse particles, cohesionless sand and dust, and generally undesirable plastic fines, so SE is a measure of the clay-like or plastic fines in granular soils and fine aggregate.  Through a series of steps to separate, disperse and then flocculate the sample, the SE score is determined as the ratio of the height of sand to the height of plastic fines reported as a percentage.

ITD, unpub. data, 2002; USGS unpub. data 2003

Formally named the Los Angeles Degradation Test and also called the LA abrasion or LA wear test, this procedure, conducted according to AASHTO T-96 or ASTM C 131 (fine) or D 535 (coarse) standards, measures the resistance of a coarse aggregate to degradation by abrasion and impact (Barksdale, 1991, p. 3-43).  A steel drum with a 5,000-gm pre-sieved and reconstituted sample and 6 to 12 steel balls is rotated 500 revolutions.  After the rotation and drying, the percent sample passing a No. 12 (1.70 mm, 0.077 in.) sieve is the Los Angeles Degradation value, sometimes termed the percent wear or percent loss.  Data ranges from lows of 10-17 for basalt and 13-21 for diabase to as high as 27-49 for granite and 33-57 for gneiss.  All LA Degradation Test data reported in the geotechnical analyses in the material source records were considered to be by the 500-revolution test method unless otherwise documented.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

Aggregates are classified for various end uses based on ranges of their LA Degradation Test (percent wear) score: Class A = max 40; Class B = max 45; and Class C max = 50.  Several older (mid-1950s) geotechnical analyses in the ITD records report the LA Degradation class as "B non-Std." rather than merely the letter B.  No information was found to document the meaning (whether non-standard test protocol or results) of this term; however, it was entered into the database as shown in the laboratory report.

ITD, unpub. data, 2002

This test measures the resistance to deformation expressed as a function of the ratio of transmitted lateral pressure to that of an applied vertical pressure of 160 pounds per square inch.  Resistance R values vary from 0 for water to approximately 100 for stiff, nearly rigid material; 80s and 90s for dense graded, high density crushed stone base course down to the 50s and 60s for less well graded and higher fines content gravelly materials.  R-Value is currently determined by the AASHTO T-190, or ASTM D-2844, test procedures.

ITD, unpub. data, 2002

Maximum diameter in inches of grain (particle) reported in the geotechnical analysis.  This size represents the minimum screen opening through which 100% of the material will pass.  Data were recorded in this database to a maximum accuracy of tenths or hundredths of inches as reported in laboratory report or as converted from metric measure; otherwise recorded in whole inches.

ITD, unpub. data, 2002

Specific gravity of the size fraction greater than the No. 4 sieve (0.187 in).  CA is currently determined by the AASHTO T-85 or ASTM C 128 test procedures.  Specific gravity (SG) is the relative weight of an object (particle or aggregate sample) compared to the weight of an equal volume of water.  SG was reported in several different ways in geotechnical laboratory analyses in ITD and other agency records.  Four types are included in this database (see below):  1) SG Coarse Aggregate (CA); 2) SG Fine Aggregate (FA); 3) Bulk SG; and 4) SG of the + 3/4-inch fraction.  The various types of specific gravity were often poorly documented or entered into the geotechnical analyses reports, especially older ones, therefore, only clearly presented data were recorded in this data set.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

Specific gravity of fine aggregate (FA), or the size fraction equal to or less than the No. 4 sieve (0.187 in).  FA is currently determined by the AASHTO T-84 or T-100, or ASTM C 127 test procedures.

ITD, unpub. data, 2002; USGS, unpub. data, 2003; ACE, 1999

Bulk specific gravity is the ratio of the dry aggregate weight to the weight of water having a volume equal to the volume of the aggregate including both its permeable and impermeable pores.

ITD, unpub. data, 2002

Specific gravity of the +3/4-inch size fraction (greater than or equal to) was rarely recorded in geotechnical analyses reports.  All of the SG +3/4-inch data was in analyses dating from the early-1960s to the early-1970s.

ITD, unpub. data, 2002; ACE, 1999

Coating and penetration of liquid, usually water, onto the surface of and into aggregate particle pores, which result in an increase in particle weight.  The property is closely associated with specific gravity and is determined by the same AASHTO/ASTM procedures.  Absorption, reported as percent, ranges from near zero to over 30% of the dry aggregate weight.  A water absorption value greater than 2 to 2.5 % is considered absorptive

ITD, unpub. data, 2002; ACE, 1999

The Sulfate Soundness Test, conducted to AASHTO T-104 or ASTM C 88 standard, provides an estimate of the resistance of aggregate to the weathering action that occurs in concrete or other applications.  Both coarse aggregate (CA = > No. 4 sieve) and fine aggregate (FA = < No. 4 sieve) are tested, and results are given in percent for CA and FA, and sometimes total.  The results of this test are not precise and should be confirmed by other tests.

ITD, unpub. data, 2002; USGS, unpub. data, 2003

The Sulfate Soundness Test, conducted to AASHTO T-104 or ASTM C 88 standard, provides an estimate of the resistance of aggregate to the weathering action that occurs in concrete or other applications.  Both coarse aggregate (CA = > No. 4 sieve) and fine aggregate (FA = < No. 4 sieve) are tested, and results are given in percent for CA and FA, and sometimes total.  The results of this test are not precise and should be confirmed by other tests.

ITD, unpub. data, 2002; USGS, unpub. data, 2003

The Sulfate Soundness Test, conducted to AASHTO T-104 or ASTM C 88 standard, provides an estimate of the resistance of aggregate to the weathering action that occurs in concrete or other applications.  Both coarse aggregate (CA = > No. 4 sieve) and fine aggregate (FA = < No. 4 sieve) are tested, and results are given in percent for CA and FA, and sometimes total.  The results of this test are not precise and should be confirmed by other tests.

ITD, unpub. data, 2002

The pH of a solution is the negative logarithm of the hydrogen-ion concentration.  Generally 7 is neutral, less than 7 is acidic, and greater than 7 is basic.  Idaho uses the AASHTO T-289 procedure to measure pH which, in addition to resistivity, is used to determine if wall backfill material meets electrochemical requirements.

ITD, unpub. data, 2002

Resistance of rock to the passage of an electrical current; the opposite (or inverse) of electrical conductivity.  Massive rock generally is highly resistive to electrical current, whereas, porous rock, especially with mineralized pore fluids or metallic minerals, commonly exhibits low resistivity (or high conductivity).  Idaho uses the AASHTO T-288 procedure to measure resistivity which, in addition to pH, is used to determine if wall backfill material meets electrochemical requirements.  Resistivity data are in units of ohm-centimeters as reported in the agency material source record

ITD, unpub. data, 2002

This comment field contains additional data and explanations regarding the sample and analyses.

User Defined text field

Cross reference listing of material source sites that are 1) the "same site,"for instance multiple operations or multiple reports by different agencies [i.e., Idaho Transportation Department (ITD), Bureau of Land management (BLM), Army Corps of Engineers (ACE), or U.S. Geological Survey (USGS)] on the same site, or 2) are "related to," for instance a pit extension or a pit adjacent to, the source listed.  A blank field indicates no demonstrated relationship.

User defined

This Report is available in an electronic format at the following URL =
http://pubs.usgs.gov/of/2004/1067/