In recent times the Republic of Srpska government finished the project named The Upper Horizons (), a large hydroelectric project that diverted underground waters in the Neretva watershed to the Trebišnjica plant and others in the Trebišnjica basin. This project was opposed by NGO's in Bosnia and Herzegovina and Croatia. They argued that the project would increase salinity levels of every surface and underground water on the right bank of the Neretva, damage internationally recognized Ramsar sites, a protected Nature Park Hutovo Blato in Bosnia and Herzegovina, protected Neretva Delta in Croatia, and important reservoirs of freshwater, plus agricultural lands in the lower Neretva valley. Cultural and historical significance Early history During antiquity, the Neretva was known as Narenta, Narona and Naro(n), and was the inland home to the ancient Illyrian tribe of Ardiaei. They became ship builders, seafarers and fishermen. Archaeological discoveries of Illyrian culture dealt both with daily and religious life such as the discovery of ancient Illyrian shipwrecks found in Hutovo Blato, in the vicinity of the Neretva River. After intense excavations in the area of Hutovo Blato in the autumn of 2008, archaeologists from Bosnia and Herzegovina University of Mostar and Sweden University of Lund found traces of an Illyrian trading post that was more than two thousand years old. The find is unique in a European perspective and archaeologists have concluded that Desilo, as the location is called, was an important trading post of great significance for contact between the Illyrians and the Romans. Archaeological finds include the ruins of a settlement, the remains of a harbour that probably functioned as a trading post, as well as many sunken boats, fully laden with wine pitchers – so-called amphorae – from the 1st century BC. Archaeologist Adam Lindhagen claimed that it was the most important Illyrian ruin. Roman period One of the most significant monuments of Roman times in Bosnia and Herzegovina is Mogorjelo. Located 1 kilometer south of the town of Čapljina, Mogorjelo remnants of the old Roman suburban Villa Rustica from the 4th century represents ancient Roman agricultural production and estate, mills, bakeries, olive oil refinery and forges. The Villa was destroyed in the middle of the 4th century, during the invasion of western Goths. Surviving residents did not restore it to its original splendor. The name of Mogorjelo is thought to be derived either from the Slavic word for "burn" (Slavic – goriti)