Guidelines for Safety Inspection of Dams - Central Water Commission

3.6 Stability, evidence and clues
(1) In concrete and steel structures – tilting, tipping, sliding &
over-turning
(2) In embankment structures, cutslopes natural slopes – bulging,
sloughing, slumping, sliding, cracks & escarpments
(3) In rock cutslopes, foundation and unlined tunnels – slumps,
slides, rockfalls, bulges & cracks
4. OPERATION AND MAINTENANCE
4.1 Service reliability of outlet, spillway sump pump mechanical –
electrical features
(1) Broken or disconnected lift chains and cables
(2) Test operation including auxiliary power sources
(3) Reliability and service connections of primary sources
(4) Verification of operators understanding and ability to operate
(5) Case and assurance of access to control stations
(6) Functioning of lubrication systems
4.2 Gate chamber, galleries, tunnels and conduits
(1) Ventilation and heat control of damp, corrosive environment of
mechanical-electrical equipment.
4.3 Accessibility and visibility
(1) Obscuring & vegetal overgrowth
(2) Galleries-access ladders & lighting
(3) Access roads and bridges
(4) Communication and remote control lines, cables and
telemetering systems
4.4 Control of vegetation and burrowing animals
(1) Harmful vegetation in embankments-oversize & dead root
channels
(2) Harmful vegetation in structural concrete joints
(3) Obstructing vegetal growth in hydraulic flow channels
(4) Ground squirrels, rats and beavers
5. BEHAVIOUR
5.1 Every attempt should be made to anticipate and have engineerobservers
present on site at items of large spillway and outlet
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