The Gagera branch of the Lower Chenab Canal--the left-hand branch in fig. 27--was found to silt. It was proposed to make a divide wall (fig. 27) extending up to full supply level. The idea is unintelligible. The silt does not travel by itself but is carried or rolled by the water. As long as water entered the Gagera branch, silt would go with it. The authorities, who had apparently accepted the proposal, altered the estimate when they received it, and ordered the wall to be made as shown dotted and of only half the height. This was done. The idea seems to have been that the wall would act as a sill and stop rolling silt. This is intelligible, but such sills do not always have much effect on rolling silt. Moreover, there was a large gap, A B, in the wall. The work is said to have proved useless, and proposals have been made to continue the wall from A to B. In this form it is conceivable that it may be of use. APPENDIX B. SPECIFICATION FOR MAINTENANCE OF CHANNELS. (See page 138.) I. ROADS AND BANKS. 1. =Filling Holes.=--Holes to be all dug out and thoroughly opened and inspected, then to be filled in with rammed earth. Never to be filled in a hurry or without digging out. 2. =Dressing.=--Heavy soil to be dressed even. Light sandy soil to be disturbed as little as possible, and grass in such soil not to be removed except when in large tufts. When dressing is done, the road to be given (as far as possible) a transverse slope from the canal side of about 1 in 50. 3. =Trees.=--Branches to be lopped so as not to obstruct riders. Great care is needed to see that the men do not lop needlessly high. Roots, if projecting on road, to be covered up or cut out. 4. =Petty Repairs.=--Settlement or wearing down, if slight, should be made good on maintenance estimates, otherwise on special estimates. Cracks should be dug out and filled in and rammed. Old “dead men” or walls of earth should be utilised or at least levelled down. 5. =Sand or “Reh” Soil.=--Can be dug out to a depth of 9 inches and removed to a distance, and (the places having been inspected by the Subdivisional Officer) replaced by good soil got from pits or berms, the places being selected with care. If the lead is slightly askew, the stuff removed can be put in the same pits from which earth is got. 6. =Laying long coarse Grass on Road.=--This can be done in cases where the removal of sand or “reh” is not practicable or has proved ineffective. The grass is laid crosswise to prevent wheels sinking in. II. JUNGLE AND TREES. 1. =Jungle.=--To be cut close to the ground or to be dug out by the roots when ordered. To be burned as soon as dry. Dead branches, twigs, etc., to be burned or removed to rest-houses, and not left about on canal land. Precautions to be taken against damage by fire to forests, etc. Clearance to include the channel[56] and both roads, and any jungle on the slopes of the spoil which obstructs the roads.[57]