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Ministry of Energy Mines and Responsible for Core Review

Prince George Aggregate Potential Map 

by P.T. Bobrowsky, N.W.D. Massey and A. Matheson


Open File 1996-24

Aggregate Resource Potential of the Prince George Area

Prince George location map
Location of the Prince George pilot study for aggregate potential maps.


Aggregate potential maps provide guidelines for testing, evaluating and managing aggregate resources within a defined area.  The maps provide first approximation estimates of broad, regional aggregate distribution and are suitable for use by municipal and landuse planners as well as the aggregate industry.


A pilot study was undertaken in the Prince George area, covering five 1:50 000-scale map sheets (Red Rock 093G10, Isle Pierre 093G14, Prince George 093G15, Wansa Creek 093G16, Salmon River 093J02) forming a cross, centred on the city of Prince George and including the major transportation corridors in the area.  The study area has a reasonable endowment of aggregates but suffers from problems in the management of the resource and conflicts with other land uses.  Methodologies developed here should also be applicable elsewhere in British Columbia.  The project had the support and cooperation of the Ministry of Transportation and Highways, the Ministry of Forests, the City of Prince George, the Regional District of Fraser - Fort George, and faculty members of the University of Northern British Columbia.  These partners were invaluable sources of relevant technical data, and also provided input on the effectiveness of the presentation format of final products.


Within the Prince George area, 321 individual areas (polygons) have been identified as significant for hosting potential natural aggregate resources. The polygons are based on soil and landform units identified and delineated by Farstad (1976a,b,c,d,e) and Dawson (1989).  The potential was assessed by compiling data pertaining to important geological factors for each of the original 1107 landform polygons within the study area.  Parameters used were landform type, soil type, area of polygon, presence/absence of historical aggregate extraction, thickness of overburden, gravel thickness and volume.  


Each factor was subdivided into several classes and ranked. The rankings were used to eliminate unfavourable polygons, and to subdivide the remainder into areas of primary, secondary or tertiary significance.  For the project area, 61 polygons are of primary, 207 of secondary and 53 of tertiary potential. These comprise 11.8%, 9.2% and 6.0%, respectively, of the total map area. All other polygons are unclassified (class = U).


The resulting aggregate potential maps have been released as:


P.T. Bobrowsky, P.Geo, N.W.D. Massey, P.Geo., and A. Matheson, P.Geo. (1996); Aggregate Resource Potential of the Prince George Area, B.C. Ministry of Employment and Investment, Open File 1996-24.


Digital versions of the maps are also available for free download or can be viewed on MapPlace.


All printed publications of the BC Geological Survey are available digitally, free of charge, from this website.


For questions or more information on geology and minerals in British Columbia contact BCGS Mailbox or call toll free (BC Residents only).