The Reservoirs Act 1975 (Capacity, Registration, Prescribed Forms, etc.) (Wales) Regulations 2016

Regulations 4 and 6

SCHEDULE 1 Information to be given in Welsh registers of large raised reservoirs

1.  Name and situation of reservoir.

2.  National grid reference of reservoir.

3.  Name and address of all undertakers with responsibility for the reservoir.

4.  A summary of the contents of all certificates or reports made under the 1975 Act, or the 1930 Act, including—

(a) the name and address of the engineer giving the certificate or making the report;

(b) the section of whichever Act the certificate is given under or the report is made;

(c) where no final certificate has been given under the 1975 Act, a statement of that fact;

(d) where no final certificate was given under the 1930 Act because the construction or alteration of the reservoir was completed before the commencement of that Act, a statement of that fact.

5.  The following information if it is revealed by any certificate, report or statement—

(a) the category of the reservoir (whether impounding or non-impounding);

(b) year(s) in which the dam(s), reservoir walls or embankments(s) were completed;

(c) the construction of the dam(s), reservoir walls or embankments(s) (i.e. whether constructed of earth, rockfill, gravity, buttress or by other means);

(d) the level of the top of the dam(s), reservoir walls or embankments(s) of the reservoir with reference to Ordnance Datum;

(e) the top water level of the reservoir with reference to Ordnance Datum;

(f) the maximum height of the dam(s), reservoir walls or embankments(s) measured in metres from the lowest natural level of the surrounding land, to the top of the dam(s), reservoir walls or embankments, excluding the height of the wave wall;

(g) the capacity of the reservoir;

(h) the water surface area of the reservoir at top water level (in square metres or square kilometres).

6.  Name and business address of the supervising engineer or, if the reservoir is under the supervision of the construction engineer, of that engineer.

7.  Date when the next inspection is due under the 1975 Act or any date recommended for the next inspection under the 1975 Act by the supervising or inspecting engineer.

8.  Particulars of any appointment made by the NRBW under section 15 of the 1975 Act.

9.  Particulars of any appointment made by the NRBW under section 16 of the 1975 Act, including the date on which they were taken.

10.  Whether the large raised reservoir is designated as a high risk reservoir.

Regulation 8

SCHEDULE 2 Prescribed form of record for a high-risk reservoir

Regulation 8

SCHEDULE 3 Prescribed matters relating to high-risk reservoirs of which an undertaker is to keep a record

Interpretation

1.  In this Schedule “fetch” (“cyrhaeddiad”) means the effective length of the reservoir over which wind can build up waves.

Prescribed matters

2.  An undertaker of a high risk reservoirs must keep a record of the following matters—

(a) any person who has acted as an undertaker or engineer under the 1975 Act;

(b) flood plan details;

(c) means of access to the reservoir;

(d) category of the reservoir (i.e. whether impounding or non-impounding), its use, the certified level up to which it may store water, its surface water area, capacity and fetch;

(e) structural character of the dam(s), reservoir walls or embankments, their date of completion, height, level of the top of the dam(s), reservoir walls or embankments and of the wave wall above Ordnance Datum;

(f) details of draw off works, bottom outlets, or any other means of lowering the water level, together with their maximum rates of discharge;

(g) physical characteristics of direct and indirect catchment areas of the reservoir and method of filling from indirect catchment area;

(h) standard average annual rainfall on direct and indirect catchment areas of the reservoir;

(i) spillway works, their type, location and level and the safety provisions made in connection with their operation;

(j) measures taken in the interests of safety on the recommendation of a qualified civil engineer;

(k) supervising engineer directions and recommendations;

(l) unusual events which could affect the safety of the reservoir;

(m) certificates given under the 1975 Act or under the 1930 Act;

(n) reports made under the 1975 Act or under the 1930 Act;

(o) directions made under the 1975 Act;

(p) appointment of referees under the 1975 Act;

(q) re-use, abandonment and discontinuance;

(r) drawing register;

(s) instrumentation at the reservoir;

(t) records of extent of opening of valves, gates and penstocks, related information and directions by an engineer.

Regulation 9

SCHEDULE 4 Certificates

The italicised letters in the forms of certificates in this Schedule indicate the information to be included as follows—

(a) name of engineer;

(b) address of engineer;

(c) name of panel to which engineer is appointed;

(d) name of undertakers;

(e) name of reservoir;

(f) situation of reservoir, with sufficient detail to identify it (including the National Grid Reference of the approximate centre of the reservoir);

(g) level above Ordnance Datum to which water may be filled, excluding the allowance made for flood conditions;

(h) level above Ordnance Datum to which water may be stored, excluding the allowance made for flood storage;

(i) date of preliminary or interim certificate as appropriate;

(j) conditions subject to which the reservoir may be filled with water or water may be stored up to the level specified;

(k) date of report, certificate, direction, as appropriate;

(l) date of completion of works;

(m) period recommended in the report within which the next inspection should be made;

(n) date of inspecting engineer’s report;

(o) name of inspecting engineer;

(p) name of referee;

(q) address of referee;

(r) date of referee’s decision;

(s) name of person appointing referee;

(t) volume of water that makes a reservoir a “large raised reservoir” under the Act;

(u) the time by which the water level must be reduced.

In these forms of certificates, square brackets and the words within them are not to be included where they are inappropriate.

Regulation 10

SCHEDULE 5 Reports

In this Schedule references to an engineer’s findings and recommendations include—

(a) confirmation that the undertaker has recorded the information required under section 11 of the 1975 Act;

(b) particulars of any directions given by the engineer specifying the dates and times at which, or the manner in which information is to be recorded under section 11 of the 1975 Act;

(c) details of any recommendations regarding alterations or additions to works or the installation of instruments or gauges for measuring leakage, deflections, settlement, uplift, pore pressures or similar matters;

(d) details of any movement of the surrounding land observed which might affect the stability of the reservoir;

(e) findings as to the adequacy and condition of the waste weir or overflow and any channels connected with it;

(f) a statement of any alterations the engineer has observed which affect the level to which water may be stored or to the level of the overflow sills since construction or since last inspection;

(g) a statement as to the adequacy of the margin between dam(s), reservoir walls or embankments level and overflow level;

(h) findings as to the efficiency of the scour pipe or discharge culvert or other means of lowering the level of the water in, and any means of controlling the inflow of water to, the reservoir.

In these forms of reports, square brackets and the words within them are not to be included where they are inappropriate.

Regulation 11

SCHEDULE 6 Directions

The italicised letters in the form of directions in this Schedule indicate the information to be included as follows—

(a) name of engineer;

(b) address of engineer;

(c) name of panel to which engineer is appointed;

(d) name of undertakers;

(e) name of reservoir;

(f) situation of reservoir, with sufficient detail to identify it (including the National Grid Reference of the approximate centre of the reservoir);

(g) level above Ordnance Datum to which water may be filled, excluding the allowance made for flood conditions;

(h) level above Ordnance Datum to which water may be stored, excluding the allowance made for flood storage;

(i) date of preliminary or interim certificate as appropriate;

(j) conditions subject to which the reservoir may be filled with water or water may be stored up to the level specified;

(k) date of report, certificate, direction as appropriate;

(l) date of completion of works;

(m) period recommended in the report within which the next inspection should be made;

(n) date of inspecting engineer’s report;

(o) name of inspecting engineer;

(p) name of referee;

(q) address of referee;

(r) date of referee’s decision;

(s) name of person appointing referee;

(t) volume of water that makes a reservoir a large raised reservoir under the 1975 Act.

In these forms of directions, square brackets and the words within them are not to be included where they are inappropriate.

Regulation 12

SCHEDULE 7 Information to be given in a notice under section 21(1) of the 1975 Act

1.  Name and address of undertakers serving notice.

2.  Name and situation of reservoir.

3.  National grid reference of approximate centre of the reservoir.

4.  Whether the undertakers intend—

(a) to construct a new large raised reservoir; or

(b) to bring a large raised reservoir back into use after that use has been abandoned.

5.  The date when it is intended that construction will commence or the date when it is intended the reservoir will be brought back into use, as the case may be.

6.  Name and address of the construction engineer or, in the case of re-use, of the engineer appointed for the purposes of section 9 of the 1975 Act.

7.  The following information about the reservoir as it will be when constructed, or brought back into use as proposed—

(a) category (i.e. whether impounding or non-impounding);

(b) date(s) or approximate date(s) of completion of the dam(s), reservoir walls or embankments(s);

(c) construction of the dam(s), reservoir walls or embankments(s) (i.e. whether constructed of earth, rockfill, gravity, buttress or by other means);

(d) maximum height of the dam(s), reservoir walls or embankment(s) (in metres), measured from the lowest natural level of the surrounding land contiguous to it, to the top of the dam(s), reservoir walls or embankment(s), excluding the height of the wave wall;

(e) the height of the dam(s), reservoir walls or embankment(s) (in metres) measured from the lowest natural level of the surrounding land contiguous to it to top water level;

(f) the level of the top of the dam, the walls or embankment of the reservoir with reference to Ordnance Datum;

(g) the top water level of the reservoir with reference to Ordnance Datum;

(h) capacity (in cubic metres), measured from the lowest natural level of the surrounding land contiguous to it to top water level;

(i) the water surface area at top water level (in square metres or square kilometres).