| Table 3B / Row 8 - Total bursts |
Bursts
Mod of Table 11 line 13 |
Marginal |
6000 |
7710 |
8254 |
We have out turned at 8254 mains repairs. This is an increase on last years figure of 6858 and is 544 mains repairs above the high level of 7710. |
Mains bursts have increased this year to 8254. This is above the reference level of 6000 and also the high level of 7710. The increase is due to the increased temperatures we have experienced in 2018/19 in comparison to previous summers over the last 5 years. The monthly trend shows the majority of bursts occured in Q2,Q3 and Q4. Also, due to our commitment to reducing leakage, we have significantly increased the number of leakage technicians, whose principle job is to find leaks, which inevitably resulted in more mains repairs being carried out. |
| Table 3B / Row 9 - Interruptions >12 hours |
DG3
Mod of Table 2 line 15 |
Stable |
220 |
659 |
414 |
There were 414 properties that received a supply interruption of greater than 12 hours in 2018/19 |
There were 418 properties that had an interruption to supply of greater than 12 hours. This is above the reference level of 220 but below the high level of 659. This is an increase from last year where we out turned at 320. Overall, when considering this against the number of mains repairs carried out, we believe that this shows resonable performance. There have been more smaller property number events than one large event which has contributed to performance in 2018/19 |
| Table 3B / Row 10 - DG2 low pressure |
DG2 – (pressure)
Mod of Table 2 line 9 |
Stable |
15 |
67 |
9 |
The properties below reference at year end has decreased from 11 to 9 and is below reference of 15 |
There have been 20 Properties added to the register and 22 properties removed. 17 properties were identified from analysis of the pressure data and violations.3 properties were identified from customer contacts. |
| Table 3B / Row 11 - Customer contacts for discolouration (nr per 1,000 population) |
Customer contacts (Discolouration) |
Stable |
1.18 |
1.57 |
0.699 |
Performance in 2018/19 was 0.699/1000 per 1000 population. This is a slight increase as last years out turn of 0.674 |
Performance in 2018/19 is still well below the reference level of 1.18/1000 population. The slight increase from the previous year is related to the warm summer of 2018 and the increased demand, which increased flows around the network, therefore mobilising previously deposited sediment. The targeted DMA flushing programme has enabled strong performance within this measure and further focus on trunk main conditioning should also have a positive impact. |
