Consent Item 4g
STAFF REPORT
City Council Consent Item
DATE: October 17, 2022
TO: Honorable Mayor and Council Members
FROM: Brendan Byrd, Public Works Director/City Engineer SUBJECT: Public Works/Engineering Department Monthly Report STAFF RECOMMENDATION:
Receive report as an informational item.
EXECUTIVE SUMMARY:
Public Works Director/City Engineer:
City Engineer/Public Works Director activities for the past month will be included in the November staff report.
Utilities Division- Utility Lead
Service Call Summary
In the month of September the utilities division completed 114 service calls by operators.
Figure 1 below shows the distribution of service calls by type. The division completed 59 Underground Service Alert (USA) mark and locates with zero miss-marks, resulting in zero broken utilities.
Figure 1. Utility division service calls by type in September.
Water Distribution System
Read water meters and completed meter worksheet.
0 5
10 15
20 25
30 35
40 Connect Disconnect Occupant Change Service Action
Number of Calls
Service Call Type
Consent Item 4g
The utilities team installed three new services to the system in the month of September. In September, three water leaks resulted in an estimated 6,960 gallons of water lost. That amount is considered low for the Utilities Department.
In the month of September the utilities team changed out four dead water meters. Continued to check service lines for lead per EPA compliance guidelines. Continued to perform annual Backflow Prevention Device (BPD) testing. Installed a new air relief valve on Kelli way, and turned the PRV back on at Kenmar and Kelli way.
Repaired one fire hydrant hit by a vehicle, and waiting for parts to repair another one hit by vehicle.
Table 1. Water leak rate and water loss estimates for September 2022.
Wastewater Collections System
The utilities team had two sewer plugs in the month of September with no overflows. Utilities cleaned 4,000 feet of sewer main.
Repaired broken sewer connection on 13th Sttreet along with roughly nine feet of main line.
Miscellaneous Tasks
The Utilities Division performed monthly maintenance on the division’s heavy equipment, including greasing and checking all fluids.
Date Location Pipe
Information
Estimated
Leak Rate
(Gallons per
Minute)
Leak
Duration
Total
Estimate
Leak
Volume
(Gallons)
9/12/2022 Hillras and Airport
Rd
4’’ Blue Bell 0.5 4 Days 2,880
9/17/2022 Smith Ln 2’’ Brass
Nipple
4 2 Hours 480
9/19/2022 Boone St 1’’ Blue
Plastic
0.25 10 Days 3,600
Consent Item 4g
Water Treatment/Wastewater Division- Chief Plant Operator Wastewater Treatment Plant Upgrade:
Staff and senior management met virtually with members of the Regional Water Quality Control Board to discuss a Basin Plan Triennial Review. This came as a result of recent engineering studies that found discharging across the river to a new percolation field may result in overall impacts equivalent to the City’s existing percolation ponds. Alternative proposals will be presented to the Board such as flow augmentation and enhanced (tertiary) treatment, so that the City can possibly continue discharging to the existing percolation ponds.
Staff met with representatives of Tesco Controls Inc. regarding a proposal for a potential CIP project to upgrade the wastewater treatment plant’s computer control SCADA and PLC systems. These important data acquisition and automated operational control systems are crucial for proper plant functioning. The City’s versions are aged and obsolete.
Emergency Generator Project:
Colburn Electric worked at both Kenmar and Drake Hill booster pump stations, installing new conduit and excavating the pads for the new, emergency generators.
Staffing:
Three staff members of the Wastewater Treatment Plant Division attended CPR and First Aid training this month.
Wastewater Treatment
Table 2. September wastewater plant effluent flows for the past five years in Million Gallons (MG) and Million Gallons per Day (MGD).
0 5
10 15
20 25
30 0
0.2 0.4
0.6 0.8
1 1.2
2018 2019 2020 2021 2022
Total Flow, MG
Flow, MGD
Total Monthly Flow, MG MAX Daily Flow, MGD AVG Daily Flow, MGD Year 2018 2019 2020 2021 2022
Total Monthly Flow, MG 26.643 27.775 22.840 25.590 26.330 Maximum Daily Flow, MGD 1.073 1.079 0.925 0.980 1.140
Average Monthly Flow, MGD 0.888 0.926 0.761 0.853 0.878 Consent Item 4g
Figure 2. September wastewater plant effluent flows for the past five years in Million Gallons (MG) and Million Gallons per Day (MGD).
Wastewater Events & Maintenance Tasks Completed:
Staff worked on dewatering one of the side-stream process tanks at the wastewater treatment plant. This semiannual to annual maintenance task is important to keep previously processed solids rich in ammonia from
the main treatment system.
Staff drained, cleaned, and returned the chlorine
contact basins to service and the plant water
hydropneumatic tank.
Staff conducted preparatory work on rebuilding
components of the grit channel, replacing wearshoes on the flights. This system went down in May after a catastrophic failure. Parts were
ordered, but not all have been received yet. Plans
are to hopefully have the rehabilitation work
complete before winter.
Staff spent a great deal of time on rehabilitating
submerged metal in one of the plants secondary
clarifiers (see photo inset right). The suction rake
arm was badly pitted and rusted with deteriorating
truss rod supports. The supports were replaced and the arm was cleaned up and re-coated, which will provide many more years of service life.
Staff replaced a 4” isolation valve and a pump stator for one of the three primary sludge pumps. The existing valve was inoperable and the previous pump stator was worn beyond proper operability.
Water Treatment
Table 3. September potable water production for the past five years in Million Gallons (MG).
Year 2018 2019 2020 2021 2022
Total Production, MG 40.375 39.503 45.218 40.281 36.360 Maximum Daily, MG 1.798 1.708 2.078 1.938 1.677
Average Daily, MG 1.346 1.317 1.507 1.343 1.212
Consent Item 4g
Figure 3. September potable water production for the past five years in Million Gallons (MG).
Table 4. Average September depth-to-groundwater static levels in the City’s active wells for the past five years in feet.
Figure 4. Average September depth-to-groundwater static levels in the City’s active wells for the past five years in feet.
Water Events & Maintenance Tasks Completed:
0 0.5
1 1.5
2 2.5
0 10
20 30
40 50
2018 2019 2020 2021 2022
Flow, MGD
Production, MG
Production Max Daily Avg Daily
0 10
20 30
40 2018 2019 2020 2021 2022
Static Level, ft
Well #1 Well #2 Well #4 Well #5
Year 2018 2019 2020 2021 2022
Well #1 30.0 28.7 28.2 30.4 30.9
Well #2 27.1 25.8 25.2 27.5 28.6
Well #4 32.6 19.6 30.7 33.3 33.7
Well #5 33.4 32.0 32.6 34.7 35.6
Consent Item 4g
Two, large bull pine trees were removed at the
Water Wells Site (see photo inset right). These trees
had large branches hanging low over Eel River
Drive, and one of them was leaning precariously
toward the Tesla battery packs, the emergency
generator, and the main booster pump building.
Plans are to grind the stumps next and fill in the area with grass, which the Eel River Trap Club will
assist in mowing.
Staff completed rehabilitation work on the Well #4
building, tiling an interior wall to prevent water rot
caused by flushing and sampling operations.
Staff replaced one of the two exhaust fans in the
chlorine building at the Water Wells Site.
Staff trouble-shot a pump trip-out problem at the
Water Wells Site. All well pumps and the main
booster pump would shut off and then immediately
turn on again at random during their pump cycle for no apparent reason. Staff found and fixed a frayed wire, which resolved the issue.
General Services and Streets - General Services Superintendent The following is a list of scheduled assignments completed by the General Services staff in September:
Staff prepared and assisted in setting traffic
control measures for the last First Friday’s
event of the season. Traffic detours were
between Ninth Street and Twelfth Street.
Staff prepared traffic control measures for
Apple Harvest Festival prior to the event on
October 1, 2022.
Staff finished repairing the siding on the
kennel building at the Corporation Yard. A
forty-foot storage container was placed next
to the kennel that took the place of a carport awning.
Consent Item 4g
Staff prepared, cleaned, and swept in
preparation of the micro slurry
project. The contractor applied the
slurry mix in the greater Kenwood
area. (Picture of Brandi Lane shown
upper right).
Staff restriped the parking lot on the
east side of City Hall.
Staff weed eat the Hillside Creek
drainage in between Fortuna
Boulevard and the mini storage.
Staff removed young alder trees to keep the channel clear from any obstruction during the wet season. (Pictured of Hillside Creek shown right)
Staff assisted the Utility staff on a new Twelfth Street water crossing. Staff assisted the Parks staff on preparation of the rodeo grounds for a California High School Rodeo Association event. Staff replaced broken boards in the grandstands, weed eat and mowed the arena area.
Staff ground out three tree stumps that caused damage to sidewalks on Baxter Lane. Staff placed form boards and graded with rock in preparation of new sidewalks.
In addition to the special tasks noted above, staff also engaged in the following regular routine maintenance activities including USA’s, street sweeping, recycling and trash management, road maintenance, vegetation management, and safety training and inspections. Staff is available for questions, requests, and emergency responses to the community.
RECOMMENDED COUNCIL ACTION:
Receive Public Works Department Monthly Report. Consent Agenda vote.