The Irpin’ or Irpen’ (Ukrainian: Ірпі́нь; Russian: Ирпе́нь) is a river in Ukraine, a right tributary of the Dnieper.
It is 162 km in length and flows through the city of Irpin'. The location where Irpin' enters the Dnieper river falls into the Kiev Reservoir which the Dnieper forms because of the Kiev Hydro-Electric Power Plant dam. Thus, the Dnieper water level at this location is lifted artificially by about 6.5–7 meters above the natural level. Therefore, the water of Irpin' is pumped into the Kiev Reservoir by powerful electrical pumps, making Irpin' the river that literally flows upwards.
The lands around Irpen' were the heartland of Kievan Rus and the chronicles mention the river in connection with several important historic events, such as the Battle on the Irpen' River of 1321 in which the Grand Duke of Lithuania Gediminas (Gedemin) gained control over the lands of what is now central Ukraine.
Coordinates: 50°27′41.18″N 30°31′47.6″E / 50.4614389°N 30.529889°E / 50.4614389; 30.529889
Irpin (Ukrainian: Ірпі́нь), or Irpen (Russian: Ирпе́нь) is a city located on the Irpin River in Kiev Oblast (province) of northern Ukraine. Administratively, it is incorporated as a city of oblast significance. It serves as he administrative center of Irpin Municipality, which includes the city of Irpin and three urban-type settlements. Population: 42,924 (2013 est.).
The city has a railway station, built in 1899. From 2003, the "Irpen Film Festival" for alternative cinematography takes place every year.
Irpin was first founded in 1899, during construction of the Kiev—Kovel railway line. Railway workers founded the town near the railway road along with other localities such as Bucha and Vorzel. The city's name (along with the city of Vorzel) was chosen due to its location on the Irpin River.
In 1956, Irpin's status was changed to that of a "city of raion (district) subordination," subordinate to the Kiev-Sviatoshyn Raion (district).
On December 30, 1962, the Presidium of the Verkhovna Rada of the Ukrainian SSR issued a decree changing the status of Irpin to that of a "city of oblast subordination," thus being directly subordinate to the oblast authorities rather than the city administration housed within the city. Also mentioned within the decree were the inclusion of the urban-type settlements of Bucha (a city since 2007), Vorzel, Hostomel, and Kotsiubynske within the city limits.