_id	code	acronym	validFrom	effectiveFrom	effectiveTo	weir_code	shmu_id
1	109000001	1	1800-01-01T00:00:00	1800-01-01T00:00:00	""	1	1
2	109000002	2	1800-01-01T00:00:00	1800-01-01T00:00:00	""	2	2
3	109000003	3	1800-01-01T00:00:00	1800-01-01T00:00:00	""	3	3
4	109000004	99	1800-01-01T00:00:00	1800-01-01T00:00:00	""	99	4