Descriptive Attribute	Value(s)
Top (m)	Opening depth: 899.131 m at west; 899.047 m at east.
Definition	Curbstone.
Phase Description	Phase IV: Nabataean Grand Design: 1st c. BCE to CE 1st c. The remainder of the subterranean canalization is...
Stage	Stage 2
Description	Locus 20 is a poorly-preserved curbstone laid east-west just to the north of the Retaining Wall, Locus 15. It is damaged along its length and missing many stones. The space between Loci 20 and 15 was most likely filled with a length of lead pipe, preserved as Locus 13. The curb continues west in front of the staircase, Locus 7, and may in fact have served as the first step here.
Stage Description	Construction of the West Staircase and Lower Temenos Retaining wall.
Bottom (m)	Closing depth: 898.936 m at west; 898.916 m at east.
Phase	IV
Architectural or Soil Locus?	Architectural