diff --git a/src/matrFacility.ttl b/src/matrFacility.ttl
index f995b9c..2504acf 100644
--- a/src/matrFacility.ttl
+++ b/src/matrFacility.ttl
@@ -147,6 +147,38 @@ somaf:Mine rdf:type owl:Class ;
            rdfs:label "mine"@en .
 
 
+###  http://sweetontology.net/matrFacility/Adit
+somaf:Mine rdf:type owl:Class ;
+           rdfs:subClassOf somaf:MiningFacility ;
+           rdfs:label "adit"@en ;
+           skos:definition "A horizontal or inclined tunnel driven from the surface for exploration, extracting ore or for dewatering a mine; also referred to as a tunnel or prospect tunnel"@en ;
+           prov:wasDerivedFrom "ISBN 0-922152-36-5" .
+
+
+###  http://sweetontology.net/matrFacility/BorrowPit
+somaf:Mine rdf:type owl:Class ;
+           rdfs:subClassOf somaf:MiningFacility ;
+           rdfs:label "borrow pit"@en ;
+           skos:definition "An area where materials including soil, clay, sand, or gravel have been excavated for use in construction at another location"@en ;
+           prov:wasDerivedFrom "ISBN 0-922152-36-5" .
+
+
+###  http://sweetontology.net/matrFacility/Quarry
+somaf:Mine rdf:type owl:Class ;
+           rdfs:subClassOf somaf:MiningFacility ;
+           rdfs:label "quarry"@en ;
+           skos:definition "An open or surface mineral excavation usually for the extraction of stone"@en ;
+           prov:wasDerivedFrom "ISBN 0-922152-36-5" .
+
+
+###  http://sweetontology.net/matrFacility/GypsumQuarry
+somaf:Mine rdf:type owl:Class ;
+           rdfs:subClassOf somaf:Quarry ;
+           rdfs:label "gypsum quarry"@en ;
+           skos:definition "An open or surface mineral working for the purpose of extracting gypsum"@en ;
+           prov:wasDerivedFrom "ISBN 0-922152-36-5" .
+
+
 ###  http://sweetontology.net/matrFacility/MiningFacility
 somaf:MiningFacility rdf:type owl:Class ;
                      rdfs:subClassOf somaf:Facility ;