when was deep tunnel in chicago built

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was deep tunnel in chicago built	1.95	0.3	5815	65	37
when	0.99	0.6	4627	4	4
was	0.95	0.4	3808	26	3
deep	0.12	0.3	2844	98	4
tunnel	1.01	0.1	9184	32	6
in	0.81	0.6	7556	90	2
chicago	0.71	0.3	6881	80	7
built	1.52	0.9	80	22	5

Keyword	CPC	PCC	Volume	Score
when was deep tunnel in chicago built	0.03	0.1	7544	9
chicago deep tunnel design and construction	0.61	0.5	3625	27
chicago deep tunnel project	0.62	0.4	3064	17
chicago deep tunnel map	0.31	0.3	384	16
chicago deep tunnel project map	1.95	0.8	8717	12
chicago deep tunnel system map	1.9	0.7	5284	32
chicago deep water tunnel project	1.44	0.2	5708	27
underground tunnels in chicago	1.1	0.4	3376	6
chicago underground tunnel system	0.82	0.8	9957	94
when was the channel tunnel built	0.17	0.4	3188	97
when was the first tunnel built	0.83	0.4	6742	93
when was the channel tunnel completed	1.52	0.6	8144	35
when was lincoln tunnel built	0.93	0.5	6589	56
chicago underground tunnels map	0.86	0.8	1917	23
when was the channel tunnel finished	0.16	0.5	2439	99
when was the channel tunnel opened	0.17	0.5	7233	60
are there tunnels under chicago	0.08	0.9	715	40
chicago underground tunnel flooding	1.73	0.8	1345	60
chicago underground freight tunnels	1.81	0.9	4401	85
washington street tunnel chicago	1.38	0.3	8403	2
what year was the channel tunnel opened	0.28	0.4	3868	61