Construction of Water Reservoirs “Pod Okny”

Work begins on the “Pod Okny” reservoirs in Nepomuky na Moravě

Construction of the “Pod Okny” water reservoirs started this summer in the cadastral area of Nepomuky na Moravě. The investor is Ing. Tomáš Kučera. The project is a small cascade of landscape water bodies on a local stream, not a large dam. The coordination plan was prepared by Natura Koncept s.r.o. of Prague / Jindřichův Hradec. The responsible designer is Ing. Tomáš Sobotka; the drawing was prepared by Ing. Alena Špičková.

What is being built

• Reservoir No. 1, the main basin

  • The storage basin.

Dam length	220.60 m
Reinforced upstream slope	89.60 m
Crest at the overflow edge	650.50 m a.s.l.
Normal water level (Hn)	649.70 m a.s.l.
Maximum water level (Hmax)	650.15 m a.s.l.
Overflow crest	649.70 m a.s.l., 5.1 m long
Surface at Hn	3,490 m²
Surface at Hmax	4,490 m²
Storage at Hn	4,774 m³
Total volume at Hmax	6,551 m³
Flood / retention volume	1,777 m³
Shallow littoral (to 0.5 m)	580 m² — 14% of the Hn surface

• Sedimentation pool on the incoming stream

  • A shallow oval pool that takes the stream before it reaches the reservoir. It is designed to drop sediment and to create a wide planted margin.

Plan area	780 m²
Length / width	42.5 m / 22.8 m
Normal water level (Hn)	650.39 m a.s.l.
Surface at Hn	617 m²
Volume at Hn	563 m³
Maximum water level (Hmax)	650.53 m a.s.l.
Surface at Hmax	662 m²
Maximum volume	730 m³
Shallow littoral (to 0.5 m)	221 m² — 35.8% of the Hn surface

Each structure has an outlet arrangement and a safety overflow. The reservoir also has a dam, a stilling basin and a waste channel.

Site work started in summer 2026. The planned completion of construction is September 2026. The reservoirs are expected to fill with water in winter 2026/27.