LTBiržų miesto (A 18P) Rotušės g. teritorijoje, tarp pastatų, priklausančių UAB „Litesko“ – Rotušės g. 20 ir prekybos centro „Senukai“ – Rotušės g. 24, 2006 m. rugpjūčio mėnesį buvo pradėti šilumos tinklų modernizavimo ir renovavimo darbai [p. 273].
ENIn 2006 heating routes, which were 2.5–3 m wide, 1.9 m deep, and about 120 m long (a total area of 335 m²) were excavated on Rotušės St. in Biržai. Radvila manor and brewery stood at this site in the 17th century. 17th–19th century stone paving, which marked the courtyard surface at that time, and the remains of the 19th century brewery were discovered at the site of the routes.