The reconstruction of the Eleyele Dam which is one of the major hydrological devices ravaged by the 2011 flood will see a rehabilitation of the spillway weir; rehabilitation of the spillway channel
to Ologuneru Bridge; rehabilitation and raising of the existing embankment by about 1.8 meters; and rehabilitation of the intake tower, scour channel and scour tunnel.
"It simply does not seem possible to meet the requirements of the reservoirs' legislation by adapting the existing spillway channel
without completely destroying what MAKEs it special.
All vegetation and debris in the bywash channel (the channel that carries water around the reservoir to prevent it filling), the spillway channel
and the channel downstream of the outlet tunnel should be removed and flows directed into the bywash channel rather than the reservoir.
Also considered safety hazards were: seepage near the downstream toe of the dam; upstream slope protection; a depression in the downstream face of the dam and debris in the spillway channel
; and trees on the embankment.
If floodwater was to pour over the top of the dam, or overwhelm the spillway channel
, it would wash away the dam's earth embanKment and put the whole structure at risK of collapse, releasing the contents of the reservoir into Marsden and further down the Colne Valley.
An inspection in 2008 suggested Yorkshire Water take action to improve safety to the existing overflow spillway channel
of Butterley Reservoir, Wessenden Road, Marsden.
along the road mill is used to derive the flood.
And improvements will see reinforcements made to the crest of the dam wall, as well as the spillway channel
Tenders are invited for Construction of PCC drain along the toe of hill side slope d/h of spillway channel
and across proposed land to tail race channel to drain off surface water to Lidder Nallah at MHP Pahalgam.
Tenders are invited for Cutting and opening sand bar at the mouth of thottappally spillway channel
for the year 2016
Tenders are invited for The work includes spillway channel
upgrades, single spillway construction, existing service spillway (riser & conduit) abandonment, upstream embankment erosion protection, filling animal burrows, and other incidental construction necessary for completion of the project.
The ongoing interventions include: treatment of leak age through masonry and concrete dams and reduction of seepage through earth dams; improving dam drainage rehabilitation and improvement of spillways, head regulators, draw - off gates and their operating mechanisms, stilling basins, and downstream spillway channels
; improving approach roads; improving office and housing accommodation; and improving dam safety instrumentation.