LIST OF REFERENCES

In regard of lenght:

year	location	obstacle	lenght of the borehole (m)	kind of the pipe	number of pipes
2005	Mszana	marshland	286	HDPE Φ 225 mm	1
2005	Poznań	river	292	HDPE Φ 180 mm	1
2005	Mszana	marshland	333	HDPE Φ 225 mm	1
2006	Świerklany	cultivated field	288	HDPE Φ 315 mm	1
2006	Bieleckie Młyny	Czarna Nida river	290	steel 219 mm	1
2006	Kiełczynek	forest	309	steel 273 mm	1
2007	Szczecin	Odra river	300	HDPE Φ 160 mm	1
2007	Racibórz	Ulga canal	417	HDPE Φ 225 mm	1
2008	Rzeszów	Wisłoka river backwater	344	HDPE Φ 225 mm	1
2008	Wincentowo	forest	467	steel 355 mm	1
2008	Stary Białcz	marshland	478	steel 355 mm	1
2008	Gołanice	forest	546	steel 355 mm	1
2008	Bytów	river	659	steel 323,9 mm	1
2009	Kędzierzyn - Koźle	shoulder	361	HDPE Φ 280 mm	1
2009	Pińczów	marshland	783	steel Φ 323mm	2
2009	Stare Serby	Odra river	828	steel 355 mm	2
2010	Pińczów	river and railway	632 in rock	steel 323 mm	2

In regard of the amount of pipes:

year	location	obstacle	lenght of the borehole (m)	kind of the pipe	number of pipes
1998	Wrocław	road	21	HDPE Φ 110 mm	9
2006	Katowice	A4 highway	78	HDPE Φ 110 mm	9
2006	Wrocław	road	154	HDPE Φ 110 mm	10
2006	Ruda Śląska	road	96	HDPE Φ 110 mm	11
2009	Malczyce	droga	15	HDPE Φ 110 mm	8

In regard of the pipe diemeter:

 

year	location	obstacle	lenght of the borehole (m)	kind of the pipe	number of pipes
2005	Wrocław	embankment of railway	60	HDPE Φ 500 mm	1
2005	Wrocław	river	57	HDPE Φ 500 mm	1
2005	Poznań	Warta river	144	spheroidal iron DN 200	1
2006	Kędzierzyn - Koźle	river	50	HDPE Φ 500 mm	1
2006	Kędzierzyn - Koźle	flood bank	93	HDPE Φ 500 mm	1
2006	Kędzierzyn - Koźle	road	64	HDPE Φ 500 mm	1
2007	Racibórz	river	159	HDPE Φ630 mm	2
2008	Opole	Odra river	237	HDPE Φ 800 mm	1
2009	Kraków	Drwina river	66	HDPE Φ 630 mm	1