Other guests and residents of the coppiced willows and the trees lining the banks of the river are white wagtail, Icterine warbler, spotted flycatcher, nightingale and golden oriole. Economy Until the early 20th century timber rafting was an important branch of the economy in the Black Forest. Like its neighbouring rivers, the Murg and Nagold, the Enz was used for transporting tree trunks and, especially, logs. Schwallungen (storage ponds that were drained for rafting), such as the Poppelsee and Kaltenbachsee at Gompelscheuer, recall this activity. In the Black Forest section of the Enz valley today forest products and tourism dominate the economy. In the muschelkalk area of the river, agriculture has a certain significance, and viticulture is practised on steep, terraced vineyards of the Enz valley. Industry and service are concentrated in Pforzheim (jewellery, precious metals, watches, commercial and administration), but can also be found in smaller centres in the catchment area of Stuttgart (especially Bietigheim-Bissingen). Since the 5th century; B.C. (the Early La Tène period) iron ore mining has been carried out in the Enz region. The visitor mine of Frischglück Pit is an example of an individual mine. Water sports The upper reaches of the Enz are mainly used by white water canoeists. The most famous section is the challenging Kurparkstrecke in Bad Wildbad. Water sports are restricted on some sections of the river in order to protect the ecosystem: Enzkreis: traffic lights on the weir at Mühlhausen: no boating on the mill's loop when there is a red light Ludwigsburg county: Enter from the riverbank and landing stages only at the marked entry and exit points. Keep off pebble islands and shoals; no camping, barbecues or fires on the waterfront, except at signed and equipped places. 1 May to 30 September 30: Roßwag (river km 34.12) closed as far as the Vaihingen Seemühle (km 29.94)Same period, but to Bietigheim-Bissingen Sawmill (km 13.16): at water levels below 65 cm (Vaihingen Gauge) Boating only with trained guide; prohibited at levels less than 45 cm. References Literature Max Scheifele: Als die Wälder auf Reisen gingen. Flößerei im Enz-Nagold-Gebiet. Verlag G. Braun, Karlsruhe, 1996, . External links Map of the course of the Enz at: High Water Forecast Office with gauge data etc. on the Enz Enz Valley Cycleway Teilbearbeitungsgebiet 45 Enz below Nagold to its confluence with the Neckar Boating information at kajaktour.de Rivers of Baden-Württemberg Rivers of the Black