The company Colloredo-Mannsfeld manages the property of Dipl. Ing. Jerome Colloredo-Mannsfeld based on concluded lease agreements. Five separate forest districts (forest production centres), divided into three forest management units (LHC), provide care for 17,189 ha of forest.
LHC JCM Zbiroh (12,380 ha) includes the Vlastec, Trhoň and Lhota forest districts. LHC JCM Dobříš (4,520 ha) manages the St. Anne Forest District. The third forest management unit is LHC Terešov (289 ha), which was attached to the property in October 2020. It currently forms its own forest district.
01 — Forest District
St. Anne Forest District
The name of the forest district originates from St. Anne’s Chapel, which stands by the road between Dobříš and Rosovice. The headquarters of the forest district is near the chapel. The St. Anne Forest District is territorially separated from the major Zbiroh part of the Forest Administration, and is managed by a separate forest management unit. Most of the forest area is located northwest of Dobříš, where it forms part of the extensive Brdy forests. Another segment of the forest surrounds the English garden of Dobříš Chateau and its south-eastern promontory stretches as far as the village of Kozí Hory near Nový Knín.
The total area of the forest is approximately 4,520 ha. The land of the forest district is located mainly in the cadastral zoning of the town Dobříš and the municipalities of Rosovice, Buková, Kozí Hory, and Stará Huť. The highest points are the peaks of Studený vrch (660 m above sea level), Hradec (648 m above sea level), and Roudný (637 m above sea level).
Almost the entire forest belongs to the Natural Forest Area 7 – Brdská vrchovina, and a smaller part belongs to the Natural Forest Area 10 – Středočeská pahorkatina. Spruce forest of the same age, founded after the calamity in the 1920s caused by the black arch moth, dominates the St. Anne Forest District. The aim of forest management in these areas is to increase the share of ameliorative trees, support natural regeneration, and ensure forest stability. The deciduous forests are mainly represented by oak and hornbeam (in lower locations) and beech. A place of interest is the Hradec Nature Reserve, with its occurrence of old beech trees. Pine is also significantly represented.
02 — Forest District
Vlastec Forest District
The Vlastec Forest District is situated on 4,391 ha north of Zbiroh. Its perimeter is bordered by the villages of Žebrák, Hředle, Knížkovice, Kublov, Podmokly, Ostrovec, Lhotka, Drahoňův Ujezd, Jablečno, Líšná, Týček and Drozdov. The altitude ranges between 300 m above sea level (Valley of the Zbiroh Stream) to 617 m above sea level (Těchovín).
The whole forest district belongs to the Forest Area 8 – Křivoklátsko. Most of the area is part of the PLA Křivoklátsko. The 1st zone covers 1,093 ha of the forest’s total area and includes a gene base of beech and oak (392 ha), the Kohoutov National Nature Reserve (30 ha), and the Lípa Nature Reserve (25 ha). A large portion of the area is part of the Křivoklátsko Forest Park.
Forest management is characterized by support for stand-friendly ameliorative and strengthening woody plants, use of natural regeneration, and the sensitive regeneration of forest cover.
03 — Forest District
Trhoň Forest District
The Trhoň Forest District is situated on 4,177 ha northeast of Rokycany and its perimeter is bordered by the villages of Volduchy, Těškov, Mýto, Kařez, Jivina, Olešná, Strašice, Dobřív, Hůrky and Svojkovice.
The altitude ranges from 400 m above sea level (Svojkovice) to 624 m above sea level (Trhoň).
The predominant woody plant species in the forest is spruce, in stands affected by water. A characteristic feature of the forest in these stands is reduced stability against stormy winds.
The extensive calamity caused by black arch moths in the 1920s is the reason for the uneven age distribution of the trees. Salvage logging represents a high share of the total amount of logging. It is essential to plant ameliorative and strengthening woody plants (30–35%) with the support for the stability of the future forest.
04 — Forest District
Lhota Forest District
The Lhota Forest District is situated on 3,928 ha northeast of Rokycany and southwest of Zbiroh, its perimeter is bordered by the villages of Volduchy, Osek, Březina, Sklenná Huť, Skomelno, Sebečice, Drahoňův Újezd, Zbiroh, Kařez and Těškov. The altitude ranges from 370 m above sea level (Valley of the Zbirožský Stream) to 721 m above sea level (Radeč – the highest peak). The Radeč Nature Park covers most of the forest area, while the smaller northern part extends into the Křivoklátsko Protected Landscape Area. One place of interest is the Natural Monument Rumpál in the eastern part of the district.
Most of the forest district belongs to Forest Area 7 – Brdská vrchovina, and its smaller northern part belongs to Forest Area 8 – Křivoklátsko. Spruce management of the middle positions predominates. The most frequently represented economic group is HS 43, followed by HS 45, 47, and 41.
Spruce of exceptional quality predominates in the forest. Stands are often affected by water, which jeopardizes the stability of the forest. Management aims to increase the stability and resilience of the forest while supporting its productive function and increasing the share of natural regeneration.
05 — Forest District
Terešov Forest District
LHC Terešov was attached to the forest portfolio in October 2020. It is a comprehensive forest management unit with an area of 289 ha, bordered by the villages of Hlovičky, Terešov, Třebnuška, Ostrovec – Lhota, and Mlečice. The terrain of the forest is mainly flat to slightly sloping, part of the property consists of steep slopes above the Vejvanov Stream west of Terešov, and also slopes belonging to the Zbiroh Stream and above the Terešov Stream. The lowest locality is above the Zbiroh Stream (340 m above sea level), the highest point is the area around St. Vojtěch’s Chapel (492 m above sea level). The whole forest is located in Natural Forest Area 8 – Křivoklátsko a Český Kras.
Conifers dominate the LHC Terešov. The main woody plant species are spruce and pine, while there is also a scattering of larch and fir. A curiosity is the occurrence of red yew, represented in this district by over 3,000 specimens. This population is located in the Nature Reserve “V Horách”, west of Terešov, and is one of the biggest yew groves in Central Europe. A monument to Jan Tetřev, the original owner of a large estate in Terešov, stands on the edge of the nature reserve. He significantly contributed to the improvement of Terešov and the local forests.