HomeMy WebLinkAboutComplete WRAB packet 1-27-14WATER RESOURCES ADVISORY BOARD MEETING
MEETING DATE: Monday, 27 January 2014
MEETING TIME: 7:00 p.m.
MEETING LOCATION: Yards Conference Room
5050 E. Pearl
Agenda Highlights:
1. Call to Order (7:00 p.m.)
2. Approval of the 16 December 2013 Meeting Minutes (7:00 p.m.)
3. *Public Comment (7:15 p.m.)
4. Information Item – Review of 2013 Operations. (8:00 p.m.)
5. Information Item - Water Utility CIP Preview (8:40 p.m.)
6. Matters (9:30 p.m.)
a. From the Board
b. From Staff
7. Future Schedule (9:40 p.m.)
8. Adjournment (9:45 p.m.)
* Public Comment Item
Information: Contact the WRAB Secretary, Laurel Olsen-Horen (303) 441-3203 or
olsenl@bouldercolorado.gov . Packets are available in the reference section of the Main
Library and on-line at http://www.bouldercolorado.gov, Departments, Public Works,
Utilities, Water Resources Advisory Board. Agenda item times are approximate.
WATER RESOURCES ADVISORY BOARD
Upcoming Agenda Items – All Items Tentative
Revised 1-2014
January 27, 2014
• Matters Item – Flood Recovery Update
• Information Item – Review of 2013 Operations
• Update on AWWA Benchmarking (Harberg/Baird)
February 24, 2014
• Matters Item – Flood Recovery Update
• Wastewater Treatment Asset Management (Douville)
• Matters Item – City Council Retreat Follow Up
March 17, 2014 (Chuck’s last meeting)
• Matters Item – Flood Recovery Update
• Information Item Water Supply/Climate Change (Taddeucci)
• Pre and Post Fire Watershed Planning (Taddeucci/Linenfelser)
April 21, 2014
• Swear in new board member
• Information Item – Overview of Water Supply & Drought Response Triggers
(Taddeucci/Skeie)
• Information Item – Overview of 2015 Capital Improvement Program
Upcoming Items/Not Scheduled
• Public Works Design and Construction Standards (Schum)
• Commercial/Industrial/Institutional Water Budgets (Sands)
• EcoDistricts Project (Sands)
• Water Conservation Futures Study (Sands)
WRAB Minutes
16 December 2013
Page No. 1
CITY OF BOULDER, COLORADO
BOARDS AND COMMISSIONS MEETING MINUTES
Name of Board / Commission: Water Resources Advisory Board
Date of Meeting: 16 December 2013
Contact Information of Person Preparing Minutes: Laurel Olsen-Horen 303.441.3203
Board Members Present: Chuck Howe, Dan Johnson , Vicki Scharnhorst, Mark Squillace, Ed Clancy
Board Members Absent:
Staff Present: Jeff Arthur, Director of Public Works for Utilities
Bob Harberg, Principal Engineer – Utilities
Bret Linenfelser, Water Quality and Environmental Services Manager
Annie Noble, Flood and Greenways Engineering Coordinator
Katie Knapp, Engineering Project Manager
Ken Baird, Financial Manager
Laurel Olsen-Horen, Board Secretary
Meeting Type: Regular
Agenda Item 1 – Call to Order [7:05 p.m.]
Agenda Item 2 – Approval of the 18 November Meeting Minutes: [7:05 p.m.]
Motion to approve the 18 November meeting minutes as amended: Squillace; Seconded by: Clancy
Motion Passes; 4:0 – board member Johnson abstained
Agenda Item 3 – Public Participation and Comment [7:11 p.m.]
Public Comment:
Scott Hoffenberg: Mr. Hoffenberg gave a power point presentation (with a focus on the current
engineering of the creek bed) which began with photos of culverts starting with Flagstaff Road and
following downstream of Gregory Creek from there. Many of the trash racks on the culverts are what
caused such catastrophic flooding in homes along the creek.
Justin Hoffenberg: Mr. Hoffenberg continued the power point presentation showing the difference in
sizing of the culverts (from Flagstaff Road to Boulder Creek) shown in the previous public comment.
Along the upper and lower sections of Gregory Creek, the culverts are rather small whereas the culverts in
the middle section are much larger and since flows increase as water moves downstream it doesn’t make
sense to have small culverts near the lower end of the creek. The angle of the trash racks on some of the
culverts is too steep (and not angled to current flood mitigation standards of 3:1) which added to the
buildup of debris during the flood event. Also the trash racks are to have clear opening at least three-times
the culvert opening area, which the ones on Gregory creek do not. In the 2010 LOMR, were the affects of
sediment transmission considered during the revision? The answer was no as sediment was not consider to
be an issue for Gregory Creek due to the steepness and speed of the creek. However, the sediment was a
huge issue along the creek.
Roger Koenig: Mr. Koenig continued the power point presentation given by the above presenters with a
focus on the big picture of flood hazard in the State of Colorado and how it affects Gregory Canyon Creek.
Mr. Koenig provided a copy of the Flood Hazard Mitigation Plan for Colorado which summarizes CO’s
vulnerability to flooding and outlines strategies to manage and reduce the impact of flood hazards. Boulder
has a continuing history of flooding. Mr. Koenig read some statistics from the Flood Hazard Mitigation
document. Gregory Creek is known to have engineering problems. WRAB has a responsibility of
advocating to City Council embrace the two-step plan of action (provided in the presentation) as a priority.
First to maintain and repair and second, fund bottom up flood mitigation for Gregory Creek.
Ed von Bleichert: Mr. von Bleichert continued the power point presentation given by the above presenters.
The neighborhood is aware of the on-going recovery efforts the city is facing. Mr. von Bleichert discussed
the financial aspect in regards to the funding issues faced by the city for use on recovery. There are five
funding sources within Utilities, three of which are enterprise funds; water, wastewater and stromwater and
flood management. Neighbors would like to know more about how the fees could be used to raise some
money needed to work on mitigation. Some next steps for how the Gregory Creek neighbors can be of use
to the city and assist in the process. Gregory Creek is primarily a CIP issue, but are there other sources of
funding available? The neighbors have been working together to collect information and would like for
WRAB to work with the community to demonstrate that need. When can we see significant funding in the
CIP for Gregory Creek?
Stewart Machle: Thank you for removing the stump from the creek. The neighbors would like to find
WRAB Minutes
16 December 2013
Page No. 2
ways to work with the city. Mr. Machle’s major concern surrounds erosion issues which impact safety, and
something needs to be done prior to spring run-off. The residents are being tasked with paying for and
repairing damaged structures as part of the recovery, but are being told they must do any mitigation to the
city’s standards; that seems unfair. One safety concern is the rock wall near Mr. Machle’s property is
falling down. There is a large erosion patch occurring on private property, but working with the city to
build to city standards is a difficult process.
Helen El Mallakh: Ms. El Mallakh provided a power point presentation on what went wrong on
Willowbrook Road. The culvert failed so catastrophically and by doing so, there was no water in the creek
due to water flows being diverted to properties rather than the creek bed. The Gregory Canyon Gulch is not
taken into consideration for mitigation. If there is a large spring runoff and no maintenance done to this
gulch, more water is going to adversely affect the neighborhood.
The boar d asked staff to answer some of the questions presented during public comment.
General Staff Response:
Council is prioritizing maintaining the drainage ways prior to spring run-off. The actual restoration of some
of the areas in the city will take longer. The city is currently working on a bid to get sediment removed
from the drainage ways. The city’s focus will be on city owned and maintained land. Private property
owners impacted with a drainage way running thru their property would need to apply for a floodplain and
wetland permit.
Community dialogue in response to staff:
The neighbors would like to know specifically, what is the responsibility of the residents vs. what is the
city’s responsibility. The neighbors are planning to convene after the new year and will be discussing the
issue of granting easements to the city.
Agenda Item 4 – Public hearing and WRAB Consideration of a Recommendation to City Council
Regarding the 2014 City Council Work Plan and Goals [8:14 p.m.]
Jeff Arthur presented the item to the board.
Executive Summary from the Packet Materials:
City Council has requested that each city board and commission respond to three questions related to 2014
work program and goals. Responses will be considered during the annual City Council retreat scheduled
for January 12-13, 2014. The questions were forwarded to WRAB members with a request to provide input
for inclusion in the December agenda materials. Responses are included as Attachment A and are intended
to allow for more efficient discussion and consensus building around a recommended motion.
Public Comment:
None
WRAB Discussion Included:
• Develop a brochure or outreach tool to provide people basic information on how to deal with flood
recovery (i.e. permitting process, public vs. private responsibilities)
• What is the city doing with the vast amount of information collected at the open houses and from
various forms of communication with community members? Staff response: The data collected
will help us calibrate floodplain modeling and mapping.
• How will the modelers use the information gathered around sediment? Staff response: The city has
never done debris-flow modeling. The modeling is probability based analysis and what the
probability of deviation for water flow is.
• Board members amended the provided draft document as part of their discussion.
Motion: Made by: Squillace; Seconded by: Clancy: Motion to approve the draft document as
amended.
Vote: 5:0
Agenda Item 5 – Matters [9:22 p.m.]
From the Board:
Board member Howe brought up the below matter(s):
• The annual Natural Hazards conference in June will have a preliminary session on lessons learned
from the Boulder flood.
• Foundation for Water Education has a sequence of pamphlets for everything from conservation to
water law.
WRAB Minutes
16 December 2013
Page No. 3
Board member Scharnhorst brought up the below matter(s):
• City of Boulder was featured in the American Water Works Association Opflow magazine and it
speaks to the resiliency of our water system and how we had only 10 of the city’s 28,600 metered
customers loose water during the flood. Kudos to staff!
Board member Johnson brought up the below matter(s):
• The city finally has appeased the FERC in testing a gate up at Barker.
From Staff: [9:26 p.m.]
• Impacts of cost escalation are becoming apparent and trends may be clearer as more of the
recovery occurs throughout the state.
• Sump pumps are continuing to run due to an elevated ground water table. The city may be more
flexible in allowing for residents to resolve any icing issues caused by pumping.
Agenda Item 6 – Discussion on Future Schedule [9:31 p.m.]
Jeff Arthur presented the item to the board.
Executive Summary from the Packet Materials:
As part of the Nov. 18, 2013 WRAB packet, staff provided a memorandum outlining flood impacts, capital
improvement plan considerations, policy issues, and financial considerations for each of the three utilities
enterprises (Attachment A) to help guide a discussion of future schedule. This memorandum is intended to
provide additional information regarding upcoming items that are expected to require WRAB consideration
in 2014. Staff is seeking input on the potential items and any additional items that may warrant
consideration next year.
WRAB Discussion Included:
• What is the likely turnout from the public for the CIP discussions? Staff response: There is an
assumption the 2015 CIP discussion will involve more public interaction due to individuals
wishing to bring up flood recovery issues.
• WRAB meetings at various water treatment plants would help to better understand the items on
the CIP.
• Meetings in the neighborhoods to bring in more public input.
• Board members shared topics which carry priority weight for items to discuss in the CIP.
Agenda Item 9 – Adjournment [9:53 p.m.]
There being no further business to come before the Board at this time, by motion regularly adopted, the
meeting was adjourned at 9:53 p.m.
Motion to adjourn by: Squillace; Seconded by: Scharnhorst
Motion Passes 5:0
Date, Time, and Location of Next Meeting:
The next WRAB meeting will be Monday, 27 January 2014 due to the Martin Luther King Jr. Holiday at
7:00 p.m., in the West Conference Room, 1st floor of the municipal building, 1777 Broadway unless
directed by staff or the board.
APPROVED BY: ATTESTED BY:
_________________________________ ___________________________________
Board Chair Board Secretary
_________________________________ ___________________________________
Date Date
An audio recording of the full meeting for which these minutes are a summary, is available on the Water
Resources Advisory Board web page.
AGENDA ITEM #___IV_____PAGE____1____
C I T Y O F B O U L D E R
WATER RESOURCES ADVISORY BOARD
INFORMATION ITEM
MEETING DATE: January 27, 2014
AGENDA TITLE: Information Item – 2013 Year in Review
PRESENTER/S:
Jeff Arthur, Director of Public Works for Utilities
Bob Harberg, Utilities-Principal Engineer
Joe Taddeucci, Water Resources Manager
Bret Linenfelser, Water Quality Environmental Services Manager
Ken Baird, Utilities Financial Manager
Steve Folle, Co-Acting Water Treatment Manager
Mike Emarine, Co-Acting Water Treatment Manager
Joe Cowan, Utilities Maintenance Supervisor
Peter Rosato, Transportation Maintenance Supervisor
Russ Sands, Water Conservation Program Manager
Joanna Crean, Public Works Project Coordinator
I. PURPOSE
A significant portion of the work performed by the Utilities Division relates to the day-to-day
operations and maintenance of existing infrastructure. While the WRAB has a very limited role
in these activities, recommendations on capital improvements, master plans, and policy issues
have a significant impact on operations. This memorandum provides an overview of 2013
operations to provide the WRAB with additional context for upcoming agenda items where the
board will be asked to make recommendations.
II. OVERALL MISSION
The mission of the Utilities Division of the Public Works Department is to provide quality water
services, as desired by the community, in a manner which protects human and environmental
health and emphasizes sound management of fiscal and natural resources. This includes the
following services:
• Potable Water Treatment and Distribution
• Water Resources and Hydroelectric Management
• Wastewater Collection and Treatment
• Stormwater Collection and Conveyance
• Water Quality Protection and Enhancement
AGENDA ITEM #___IV_____PAGE____2____
• Infrastructure Planning, Construction and Maintenance
• Administration and Emergency Planning/Response
III. PRECIPITATON AND TEMPERATURE
Boulder experienced record breaking precipitation in 2013. Total snowfall was 125.6 inches,
compared to an average of 90.7 inches. Early to mid-winter was very dry, and March snowpack
readings in the North Boulder Creek watershed were significantly below average. Most of the
2013 snowfall occurred during the months of April and May. Boulder’s reservoirs filled and
spilled, and no drought stage declarations were needed during 2013. At the beginning of the
2013-2014 winter (September – December), the snow water equivalent at the University Camp
Snotel site was 5.8 inches which is the historical average.
Total Boulder precipitation for the year was 30.14 inches, compared to an average of 20.69
inches. The previous record for annual total precipitation (29.93 inches) was set in 1995.
Although low rainfall for May – September indicated Boulder could experience a year of lower
than average precipitation, almost 15 inches of rain were recorded in Boulder between
September 9 and 13. This eclipsed the previous record of precipitation from a single storm event
of 7.37 inches of rain on May 5-8, 1969. Over half of Boulder’s 2013 precipitation fell between
September 9 and 16.
The historical rains of September 2013 also had unprecedented effects on the city’s source water
system. With a peak inflow to Barker reservoir of 408 cubic feet per second (cfs) on September
13, Barker Reservoir refilled and spilled on September 15. This is the first recorded incidence of
Barker Reservoir spilling in September and the first recorded incidence of Barker Reservoir
spilling more than once per year.
The National Oceanic Atmospheric Administration (NOAA) reported Boulder’s mean
temperature for 2013 was 50.73 degrees compared to a high of 56.02 in 1954 and a low of 48.91
in 1993.
IV. FINANCIAL OVERVIEW
Water Use Based on Billed Consumption
Billed water consumption in 2013 was the second lowest in over 20 years. Compared to 2012,
consumption decreased by over twelve percent. This was due to the unusually hot and dry year in
2012 and record precipitation in 2013. Specifically, precipitation in 2013 was the highest it has
been in over 100 years due to the September flood and also a wetter than normal springtime.
Because of the flood, it appears that outdoor watering stopped after early September. While it
changes from year to year depending on weather, it’s estimated that people stopped outdoor
watering around one month earlier than usual. As a result, consumption for the month of October
was down 35 percent compared to the average of previous years. These trends are demonstrated
in Figure 1 comparing yearly consumption by month.
AGENDA ITEM #___IV_____PAGE____3____
Figure 1: Billed Monthly Water Usage in 2013
Revenues
The lower billed consumption resulted in revenue for water use coming in $1.1M less than
anticipated. Fortunately, Plant Investment Fees (PIFs) were at about $1.5M more than projected.
This was due to large development projects such as 3100 Pearl and the Peloton. Both the
Wastewater and Stormwater/Flood Management Funds were also helped by the higher than
expected PIFs, and all the utilities funds ended the year slightly above revenue projections.
Expenses
In December 2013, an adjustment was made to the budget to increase available funds, mostly
due to the flood response. These appropriations came from fund balance. A portion of these
expenses should eventually be reimbursed by FEMA. The remainder will be covered through
rates or re-prioritizing of operating or capital expenses.
V. OPERATION OVERVIEW: WATER RESOURCES
Operations
Snowpack
The city relies upon snowmelt runoff to fill and store water in its upper Boulder Creek basin
reservoirs each year. As of March 1, 2013 the snow water equivalent readings (SWE)1
1 Snow Water Equivalent (SWE) is the amount of water contained within the snowpack. It can be thought of as the
depth of water that would theoretically result if you melted the entire snowpack instantaneously.
were
almost 40 percent below average. However, heavy late spring snows in April and May improved
the SWE to normal conditions as shown in Figure 2.
AGENDA ITEM #___IV_____PAGE____4____
Figure 2: 2013 March – May North Boulder Creek Watershed Snow Water Equivalent
Streamflows
Figure 3 includes 2013 and historical average stream flow conditions upstream of Barker
Reservoir. The 2013 peak snowmelt runoff season greatly exceeded the historical average.
During the September flood streamflows at Nederland were less than during spring runoff but
were still noticeably higher than average. Peak flood flows reached 408 cubic feet per second
(cfs) at 2 a.m. on Sept 13.
The September flood also resulted in an unusual water rights administration situation on Boulder
Creek. With the exception of a brief period from Nov. 7-Dec 1, a prolonged “free river”
condition has existed since the flooding, which means water availability has exceeded active
water rights diversions.
AGENDA ITEM #___IV_____PAGE____5____
Figure 3: 2013 Middle Boulder Creek Streamflows at Nederland
Reservoir Storage Levels and Colorado Big Thompson (CBT) Water Usage
The snowfall and runoff from the 2012-2013 winter allowed the city to fill its mountain storage
reservoirs during the spring. After being partially drawn down, Barker Reservoir again filled and
spilled during September. This is the only recorded incidence of Barker Reservoir spilling more
than once in a single year or spilling in September. Due to the reservoir refill late in the year, the
city’s total mountain reservoir storage on December 31, 2013 was 16,120 acre-feet, compared to
13,790 acre-feet on December 31, 2012.
The city used a total of 10,307 acre-feet of CBT water in water year 2013 (October 1, 2012 to
September 30, 2013).
Figure 4: 2013 Water Supply Conditions in Comparison to 2012
DATE BOULDER MOUNTAIN RESERVOIR STORAGE (ACRE-FEET)
05/29/2013 15,673
05/29/2012 15,814
Difference in 2013 -141
BOULDER MOUNTAIN RESERVOIR STORAGE (ACRE-FEET)
10/25/2013 17,133
10/25/2012 13,160
Difference in 2013 +3,973
COLORADO-BIG THOMPSON SYSTEM STORAGE (ACRE-FEET)
05/29/2013 487,167
05/29/2012 646,480
Difference in 2013 -159,313
COLORADO-BIG THOMPSON ANNUAL ALLOTMENT (ACRE-FEET)
April 2013 12,609 (60%)
April 2012 21,015 (100%)
Difference in 2013 - 8,406
SNOW WATER EQUIVALENT AT UNIVERSITY CAMP SNOTEL SITE
05/29/2013 11.6
05/29/2012 5.4
Difference in 2013 +6.2
AGENDA ITEM #___IV_____PAGE____6____
Hydropower, Irrigation Ditches and Agricultural Leasing
The city received $1,944,812 in hydropower revenue for 2013 compared to projected revenue of
just over $2 million. Total generation for 2013 was about 42 million kilowatt hours (kWh) or
enough to meet the average annual needs of approximately 7,000 households.
Boulder Canyon Hydroelectric (BCH) resumed commercial operation on June 12, 2013 under a
new power purchase agreement with Tri-State Generation and Transmission Association. Actual
generation and revenue from BCH was about 12 million kilowatt hours and $460,000. The
September flood actually increased BCH generation in subsequent months because more water
than usual was available for power generation.
During the September 2013 flood, all eight hydroelectric plants were tripped off-line and
temporarily ceased generation. The BCH power plant office flooded, but no significant
equipment damage occurred at any of the facilities.
The Water Utility is a shareholder in several irrigation ditch companies. Sections of most of the
irrigation ditches in and around the city were damaged or compromised as a result of the
September flooding. Anderson and Farmers Ditch Companies, which include Utilities staff as
board members, are taking the lead in flood related repairs for their respective ditches. The work
will be done during the 2013-2014 winter with the goal of being operational for the 2014
irrigation season.
In 2013, the city leased 5,600 acre-feet for agricultural uses and no drought-related curtailment
was required in the city’s leasing program.
Water Conservation
Although water use restrictions were not required in 2013, regional drought conditions resulted
in substantial public concern, particularly prior to the late spring snowfalls. Staff participated in a
drought panel presentation to Water Congress, created a new ad campaign, targeted mailing to
high water users and designed a “drought meter” for a newly launched Colorado Water
Conservation Board drought webpage. The city also continued to collaborate regionally, issuing
joint water conservation press releases and placing joint ads. The city was recognized with a
2013 EPA WaterSense Excellence award for a “Drought Busters” program developed with the
Center for Resource Conservation (CRC) and subsequently adopted by other cities.
Capital Improvements
In 2013, capital improvements projects in the source water system primarily focused on the
Barker facilities, including continued maintenance work on the Barker Gravity Pipeline and
performing a pressurized test and inspection of outlet gate number 7 at Barker Dam. At Albion
Dam, a temporary solution to unplug one of two clogged outlet pipes was achieved using divers
during the late summer. A planned fall inspection of the Albion outlet works had to be delayed
until 2014 as the September rainfall prevented the complete draining of the reservoir prior to
winter freezing and icing. The Kossler south dam refacing project also had to be delayed until
2014 to allow time for required design revisions. Using updated topographic survey data,
AGENDA ITEM #___IV_____PAGE____7____
computer modeling of design flood conditions revealed that higher water elevations needed to be
accommodated in the Kossler design.
Upcoming Key Issues
Completion of the Albion Dam outlet works inspection and the Kossler south dam refacing
projects that were delayed in 2013 are now planned for completion in 2014. Another key focus
for 2014 will be revisiting impacts of climate change on water supply including an update to the
Water Conservation Futures Study.
In the city’s hydroelectric program, five of the city’s existing power purchase agreements (PPAs)
will expire between 2015 and 2017. The city has the option to extend these agreements, most of
which are for a 30-year term. Staff will research potential hydropower sale options, including
city use of the power under a municipilization scenario, to make sure the city obtains the most
favorable PPA terms in the future. Evaluation of specific PPA options will begin in 2014.
VI. OPERATION OVERVIEW: WATER TREATMENT & DISTRIBUTION
Operations
Due to the record breaking precipitation, the total water production during 2013 was 5,733
million gallons (MG), which is the second lowest total water production in the last 10 years. The
Betasso Water Treatment Facility (Bessato), which has a capacity of 40 million gallons per day
(MGD) and treats water from the Boulder Creek watershed, treated 75 percent of the total water
use in the city. The Boulder Reservoir Water Treatment Facility (BRWTF), which has a capacity
of 16 MGD and treats water from the Colorado Big Thompson (CBT) water system, treated 25
percent of the total water used in the city.
BRWTF operations were significantly impacted by the September flooding. The facility
experienced a power outage early in the storm event and ultimately remained offline until
October 1 due to turbidity issues in Boulder Reservoir and damage to the Boulder Feeder Canal
from Carter Lake. Following a 10-day testing period to ensure operability, the facility was shut
down due to low demand. The facility is expected to resume operation in early 2014.
Betasso suffered minimal damage due to the 2013 flood, although it operated on the emergency
generator for approximately three days before power was restored. Power and communications
to the SCADA system were lost at seven critical reservoirs and flow control stations for weeks,
however no water quality or quantity disruptions or violations occurred due to the flood (or in the
whole of 2013). Obtaining chemical deliveries and emergency generator fuel posed great
challenges, and many deliveries and plant personnel were re-routed through Nederland via 1-70
and down Sugarloaf Rd (which is hazardous for 18 wheelers) until CO Highway 119 was re-
opened.
In 2013, the drinking water system met all regulatory compliance requirements. Staff distributed
the required Consumer Confidence Report electronically for the first time and conducted
regulatory monitoring for 30 unregulated contaminants (UCMR3) to provide occurrence data and
basis for future regulations. Staff initiated a collaborative pre- and post-fire watershed planning
project that includes a systematic analysis for forest/watershed protection. Boulder Reservoir
AGENDA ITEM #___IV_____PAGE____8____
water quality thresholds were developed to integrate with Parks and Recreation Site Management
Plan. Staff implemented the IWLive model for real-time water distribution system modeling
capabilities and made improvements to remote monitoring at storage tanks and pump stations.
Maintenance activities in the distribution system were increased this year by adding a contractor
to assist with fire hydrant maintenance and valve operations. During the post-flood period, a
contractor was able to perform inspection and maintenance services to 931 fire hydrants and
1,441 fire hydrant and mainline valves. Increased construction activity in 2013 had a significant
impact on the demand for utility locates with approximately 12,000 requests.
Capital Improvements
During 2013, several improvements and studies were done at the BRWTF. One was
implementing improvements and modifications to the carbon dioxide system to provide more
consistent acid feed capabilities. Another was performing an Arc Flash Hazard Analysis and
Relay Coordination assessment of the electrical system. A study and final design of a flash mix
pumping system for the combined filter effluent was completed and submitted to the Colorado
Department of Public Health and Environment (CDPHE) for review and approval. Receiving
approval in late 2013, bidding and installation of this system will take place in 2014.
At Betasso, the consulting firm Brown and Caldwell (BC) was selected to perform a study to
identify options to alleviate the residuals issues. The first phase of work performed included
reviewing existing reports and process data in order to fully characterize current residuals
production. General descriptions of each alternative were presented together with sizing and cost
information by various equipment manufacturers. On-site pilot trials will be conducted in 2014
following study recommendations.
In 2012, the city contracted with Malcolm Pirnie, the Water Division of ARCADIS (ARCADIS)
to assist in the investigation of methods to improve the Betasso filter productivity during high
color events. In 2013, the priority was to set up a pilot for these trials. In 2014, the goal is to
utilize the pilot for identification of future filter improvements, assessment of ferric chloride for
arsenic removal, and spring runoff optimization.
Upcoming Key Issues
Water quality conditions at Boulder Reservoir after the flood have significantly diminished,
requiring additional attention to the quality of water delivered to the BRWTF. When the facility
resumes operations, a weekly taste and odor test will be conducted. Information will then be used
to answer questions from the public or make changes to the treatment processes.
For the near-term, the upcoming issues related to Betasso include finalizing the residuals study
(Brown and Caldwell), the filter performance study (ARCADIS), and continuing to identify and
prioritize plant needs for the 2016 capital project.
Related to water quality, CDPHE is initiating a stakeholder process to update the Colorado
Primary Drinking Water Regulations and city staff will be part of the process. City staff will also
work on implementing an online form for backflow prevention reporting directly by customers
AGENDA ITEM #___IV_____PAGE____9____
and testers, and further implementing utility standard operating procedure document
management in Laserfiche.
VII. OPERATION OVERVIEW: WASTEWATER TREATMENT & COLLECTIONS
Operations
The Wastewater Treatment Facility (WWTF) operated with no effluent permit violations in
2013, treating an average of 15 MGD of wastewater. Due to the extreme precipitation and
associated flooding in September, the WWTF flows were unprecedented and significantly
increased the overall annual average. Staff successfully transitioned away from gaseous chlorine
and sulfur dioxide for disinfection as the new UV disinfection system was commissioned.
Throughout the year, the UV system has been optimized and a dose of 1/3 to 1/2 of the original
value has been accomplished, which should yield ongoing operations and maintenance savings.
A $1,080,000 grant from the State of Colorado was received to help fund planning, optimization,
design, and construction of nutrient removal improvements, specifically nitrogen. The third full
year of using electric power generated from Solar PV occurred during 2013 at the WWTF, with
the overall system production to date exceeding 5 million kWh. When combining solar power
with power generated by the cogeneration system, approximately 1/3 of the electrical power
needs for the WWTF were generated by renewable technology in 2013.
The September flood had a significant impact on the wastewater collection system including
surcharges and deposition of sand, rock, and debris throughout the nearly 400-miles of collection
system piping. Utilities engineering and maintenance staff continue to work closely with
contractors to assess and inspect (TV) the collection system to determine maintenance and
cleaning priorities to prevent blockages and backup events. In late 2013, staff began using
localized Cast in Place Pipe (CIPP) repairs to address isolated breaks and holes in city
mains. Each repair can be done at a third of traditional costs, in half the amount of time. In
addition, staff has also started to use an injectable grout in manholes to reduce infiltration and
inflow. Staff has completed the Pipe Assessment and Certification Program (PACP) and will be
re-evaluating problematic root and grease lines for the purpose of prioritizing cleaning efforts.
This should help optimize the frequency of cleaning and minimizing future backups.
Regulatory efforts focused on Boulder Creek data collection to address future nutrient regulatory
requirements, refinement of restrictive ammonia effluent limits and compliance with Boulder
Creek aquatic life criteria. Staff actively participated in multiple State-directed work groups
focusing on implementation of future nutrient regulations, implementation and modification of
arsenic water quality standards, implementation of the impaired waters listing for the next 303(d)
list and revised sediment criteria. Efforts continued to regulate industrial discharges through the
Industrial Pretreatment Program through the renewal of permits for major dischargers such as the
University of Colorado. The WWTF and BRWTF laboratories continued to expand in-house
analytical capabilities and completed over 50,000 analyses in 2013.
Capital Improvements
The $8M upgrade project to modernize the headworks and digester facilities, and install the UV
disinfection system, was completed in 2013. This project was a significant step forward in
addressing a major safety risk (the use of chlorine gas and sulfur dioxide gas), and replacing
AGENDA ITEM #___IV_____PAGE____10____
aging mechanical and electrical infrastructure. Additionally, a Strategic Plan for the Process
Automation System (PAS) at the WWTF was completed to serve as a roadmap and
implementation tool to upgrade the hardware and software components to the instrumentation
and control systems.
Within the wastewater collection system, approximately 19,700 feet of 8”, 12”, 21”, and 24”
mains were lined by a contractor at a cost of $547,000. City crews were able to rehabilitate 281
manholes. Additionally, the manholes in Arapahoe Avenue from 14th Street to Folsom Street
were rebuilt in conjunction with the transportation project in that corridor.
Upcoming Key Issues
With adequate hydraulic and process capacity, the focus moving forward for the WWTF will be
regulatory issues and aging infrastructure. Regulatory drivers in 2014 include nitrogen (daily
maximum ammonia and nitrate, as well as Regulation 85 total inorganic nitrogen), and an
associated design project will identify treatment modifications to meet these limits. Two other
key capital issues are upgrades at the IBM Lift Station to address several concerns including
emergency flow storage, as well as a determination of the path forward for the aging
cogeneration system. The status of city-wide electric utility municipalization may factor into
decisions about cogeneration. Key operational issues for 2014 will involve organizational
changes and associated technology to support unattended operation at night as a departure from
24/7 coverage.
The city is moving forward with the development and implementation of a more aggressive,
proactive wastewater collection system operations, maintenance, and renewal plan. Part of this
approach will include using significant contractor resources to perform sewer cleaning and
inspection as part of a new condition assessment program. Typically, such a condition
assessment is scheduled with a five-year recurrence interval; however, due to the September
2013 flood the initial condition assessment cycle will need to be expedited to two years in order
to assess flood damage.
Additional water quality studies will be conducted in 2014 focusing on sources of arsenic, fate
and transport of nutrients in Boulder Creek and evaluation of ammonia toxicity in Boulder
Creek. These efforts are necessary to support future compliance requirements of the WWTF
integrated into state-directed regulatory work groups.
VIII. OPERATION OVERVIEW: STORMWATER & FLOOD MANAGEMENT
Operations
The city’s stormwater and flood management utility prepares the city for significant rainfall
events through floodplain mapping, risk assessments, floodplain regulations, public education,
flood insurance, flood preparedness, master planning, stormwater quality programs, and
maintenance. Operations were significantly impacted and reprioritized to respond to the
September flood.
Flood control maintenance operations include vegetation control in and around waterways,
mowing of native grass channels and embankments, as well as cleaning and inspection of trash
AGENDA ITEM #___IV_____PAGE____11____
racks for ditch company agreements and culverts under roadways. This work includes both
planned and responses to calls from the community. The 2013 year was a busy season due to the
late and wet spring conditions which made for a shortened window of maintenance before water
began flowing in creeks and ditches. The wet weather also increased the mowing cycle
frequency and added to the growth of vegetation. Due to the September flood, the number of
calls for service from the community significantly increased. Staff responded by removing
sediment and debris from trash racks, culvert, channels, paths, bridges and other structures
throughout the system. In 2013, the city implemented a new Constituent Relationship
Management (CRM) tool called Inquire Boulder to track service requests which will enable the
city to improve data comparison from year to year.
City Council approved a “Critical Facilities” ordinance requiring certain land uses to meet higher
regulatory standards for development in floodplains. This ordinance was the result of a multi-
year process that removed numerous requirements contained in initial drafts to address concerns
from potentially regulated businesses.
The state-issued Municipal Separate Storm Sewer System (MS4) stormwater permit was
substantially revised in a draft released by the state in late 2013. Substantial effort was spent on
providing comment and revisions to the draft revised permit. A new MS4 permit is expected in
mid-2014 and will likely include additional regulatory requirements for stormwater discharges.
The development of a more robust drainageway asset management system integrated with the
existing maintenance management system, along with updated condition assessments was
fortuitously completed prior to the September 2013 flood disaster. This documentation should
prove valuable in applying for damage reimbursement from FEMA as well as the planned on-
going use of this information from planning purposes.
Capital Improvements
Floodplain mapping studies to identify hazards and support mitigation efforts generally involve a
multi-year study and process prior to submittal to FEMA for review and adoption. For instance:
• New topographic base mapping using LiDAR technology was recently completed and
will be used in future mapping projects.
• Twomile Creek/Upper Goose is currently being remapped.
• A mapping study of Boulder Creek is currently in review by FEMA.
• Mitigation planning for South Boulder Creek is ongoing.
• The Goose Creek Restoration Project was implemented to improve wildlife habitat and
water quality along Goose Creek between 47th St. and Boulder Creek.
• A mitigation project on Wonderland Creek, upstream of the Kings Ridge neighborhood,
had been designed and slated for construction prior to the flood.
In 2013 the city installed approximately 3,500 feet of new stormwater collection and conveyance
sewers under Arapahoe Avenue from 14th Street to Folsom Street and approximately 1,000 feet
of storm sewers along Pearl Street as part of the Boulder Junction Project.
Upcoming Key Issues
AGENDA ITEM #___IV_____PAGE____12____
The September 2013 flood will continue to influence both operations and capital efforts for
2014. Significant sediment and debris removal will be required to restore capacity of both local
and major drainage systems. Longer term efforts will be required to restore habitat and features
such as drop structures and sediment traps. Additional key issues will include prioritization and
funding of mitigation projects, consideration of property acquisition to reduce hazards and/or
allow mitigation, and consideration of changes to regulations and design standards to provide a
higher level of protection from future floods.
A new MS4 stormwater permit will be issued in 2014 and staff will continue to actively
participate in the state-directed permit development process. Additional regulatory requirements,
including reporting, water quality monitoring and stricter enforcement will likely be part of the
new permit. As a result, changes will need to be made to the Boulder Revised Code, city
ordinances and city Design and Construction standards in order to comply with new permit
requirements.
AGENDA ITEM # V; PAGE 1
C I T Y OF B O U L D E R
WATER RESOURCES ADVISORY BOARD
INFORMATION ITEM
MEETING DATE: January 27, 2014
AGENDA TITLE: Informational Item –Water Utility Capital Improvement Program (CIP)
Preview
PRESENTERS:
Jeff Arthur, Director of Public Works for Utilities
Robert Harberg, Principal Engineer-Utilities
Steve Buckbee, Engineering Project Manager
Kevin Clark, Engineering Project Manager
EXECUTIVE SUMMARY
This information item is intended to provide an update regarding Water Capital Improvement
Program (CIP) issues ahead of the formal budget process by providing:
Background information
Flood update
Project updates
Schedule of key milestones
The formal CIP budget discussion will begin in April with a WRAB recommendation scheduled in
June. Therefore, no formal action by the WRAB is requested at this time.
BACKGROUND
The Utilities Division’s primary focus is to provide quality water services, as desired by the
community, in a manner which emphasizes efficient management of fiscal and natural resources,
and protects human and environmental health. Capital investment in infrastructure is core in
carrying out the utilities’ mission of delivering safe and reliable water to our customers and
ensuring that water is available for fire protection.
In October 2011, the city developed a consolidated Water Utility Master Plan (WUMP) that
addresses source water, water treatment, and the distribution system. The WUMP incorporates an
evaluation of the treated and source water system conditions and recommendations for the next 20-
year planning period.
The 6 year Water CIP relies on the WUMP for guidance along with evaluation of other issues
identified during routine operation and inspection of the City’s water system. Several issues have
AGENDA ITEM # V; PAGE 2
been identified along with a preliminary identification of potential impacts to the CIP. Most of the
changes are unrelated to the 2013 flood since the damages have already been repaired or are in the
process of being repaired using money that was appropriated in 2013..
ANALYSIS
Distribution System Rehabilitation
The City of Boulder has been systematically replacing undersized and corroded water mains for a
number of years. Most of the undersized mains that were providing water transmission have now
been replaced with 6 and 8-inch pipe so the emphasis has shifted to replacing corroded and break
prone pipes.
The Utilities Project Management staff is using a data based decision method to determine which
pipes should be replaced. The data based decision method considers pipe age, material, break
history, size, pressure, location, if a water dependent business is affected, difficulty of repair, and
soil type as factors in determining which pipes to replace. Numeric values assigned to each factor
are summed for each pipe segment to determine its rating. Those pipes with the highest totals are
considered for replacement. The final decision on whether or not to replace a pipe segment still
depends upon engineering judgment. Unique social and environmental factors that are not easily
quantified must be taken into consideration in determining the pipes segments to renew. This tool
continues to evolve and adapt each year.
With the passage of ballot question 2 D last November, Transportation has received a multi-
million dollar budget increase to inspect, restore and rehabilitate transportation infrastructure
through 2029. In order to replace problematic mains prior to roadway improvements, an annual
increase of $1 million in the Water Utility budget for additional water main replacement is being
considered.
Transmission System Inspection and Rehabilitation
Several leaks occurred on water transmission lines during 2013. Of note is the 26” main between
Sunshine Hydroelectric Facility and 4th & Mapleton that carries about half of the City’s treated
water on an annual basis. Another is an 18” line that connects 101 Pearl PRV station and
Chautauqua Reservoir. After an inspection of the 26” main, money for rehabilitation/inspection of
the upper 30” section of main between Betasso Water Treatment Facility and Sunshine
Hydroelectric Facility has been re-prioritized to the lower 26” section. Additional CIP money is
being considered for the problem 18” main and continued inspection of the upper 30” section of
main between Betasso Water Treatment Facility and Sunshine Hydroelectric Facility.
Area II Annexation Infrastructure
Annexation of Boulder Valley Comprehensive Plan Area II properties that have been affected by
the flood is being considered. Preliminary estimates of $5-$6 Million would allow construction of
utilities necessary to serve the nearly 200 properties that are currently lacking City water and/or
sanitary sewer service along with any needed transportation infrastructure upgrades. This funding
is being considered for the years 2015 and 2016.
AGENDA ITEM # V; PAGE 3
Treated Water Stranded Facilities
Gunbarrel water storage tank painting was scheduled for this year. An inspection of the tank this
fall revealed steel corrosion issues inside the tank. An increase to the project scope and budget will
be requested in 2014 to address the budget shortfall.
The above grade walls for Kohler water storage tank were replaced in 2013. As a result, funding
for the roof replacement in 2015 and 2016 will likely be reduced.
Betasso Water Treatment Facility (BWTF)
Preliminary design for the BWTF capital improvement project will begin in mid 2014.
Construction is scheduled to begin in 2016 and extend through 2017. Some problems to be
addressed are:
• At flows in excess of 30 to 35 MGD, the pretreatment is inadequate to sustain effective
treatment.
• During periods of high concentrations of color and total organic carbon in the source water, the
filter run time is limited due to turbidity breakthrough.
• The residuals thickening, dewatering, and drying processes are insufficient to treat the dilute
concentration of the solids.
• Replacement of assets at the end of their useful life.
• Increased chemical storage.
• A new backup generator and increased fuel storage.
Two studies were initiated to evaluate a couple of the major problems listed above. In 2012,
Malcolm Pirnie/ARCADIS began working on the capacity issues encountered during spring runoff
when color is high. Staff is currently working with the consultant, Brown & Caldwell, to follow
through on the 2012 report recommendations and assist with pilot plant tests through mid 2014.
The initial assessment has been completed and thickening technologies will be selected for pilot
testing in 2014. The results and recommendations from these two studies will be used to help
inform and develop the overall scope of the upcoming CIP project at the BWTF.
The schedule for the BWTF planning and improvements over the next year include completing the
two studies in progress and selection of the Capital Improvement Project design consultant, along
with refinement of the scope and cost. Some dates have been pushed back since the July 15, 2013
WRAB meeting. The timeline has been pushed back to accommodate possible reprioritization
associated with the flood and effort and resources need to address flood repairs.
• Spring Runoff Optimization Study - Late Summer 2014
• Preliminary Residuals Study (recommendations for pilot project) - Late 2013
• Selection of BWTF Capital Improvement Project design consultant – Summer 2014
• Revised cost estimate and WRAB check in on preliminary design direction - Winter 2014
• Final Residuals Study Report - Fall 2014
AGENDA ITEM # V; PAGE 4
Boulder Reservoir Water Treatment Facility (BRWTF)
A backup power generation study is currently underway to determine the feasibility of providing
for and contracting a temporary generator on site during emergencies or when treatment cannot be
interrupted by a power outage. Plant electrical deficiencies were also found during and an
electrical study in 2013 and will be addressed in 2014 with existing funding.
The proposed 2020 BRWTF bond projected is slated to address canal intake improvements,
pretreatment improvements for taste and odor, increased chemical storage, standardized
instrumentation, assets at the end of their useful life and permanent backup power facilities.
Wittemyer Ponds
In terms of the source water system components, the only city owned facility significantly
impacted by the September 2013 flood was the Wittemyer Pond facility. The flood waters
breached numerous embankment berms and significant repairs will be required to allow for storage
and delivery of water through the system including repairs to the Howell Ditch component. The
cost of the repairs is estimated to be about $125,000 and these will be completed in 2014. The
repair work should be eligible for FEMA reimbursement.
Barker Dam Outlet
During the recent lower outlet gate test and inspection at Barker Dam (December 2013), it was
discovered that pin-hole leakage though a corrosion nodule is occurring through the Gate No. 10
frame. This gate is the lowest outlet gate having the greatest hydraulic head pressure bearing upon
it and is also the oldest gate which was not replaced in the 1947 Barker Dam Rehabilitation (i.e.
this gate is 1907 vintage making it over 105 years old.). The gate will be inspected from the
downstream side on a quarterly schedule (i.e. dewatered and inspected every 3 months) to monitor
the overall leakage and track the progression of the corrosion pin-hole as applicable until a
removable bulkhead can be designed and installed.
Additional budget is being considered to investigate and repair the newly discovered leak in the
Gate No. 10 Gate Frame. Current budget estimates are $50,000 in 2015 for alternative bulkhead
design and $100,000 in 2016 for installation of a removable bulkhead.
Kossler Dam
The city completed the Hazard Classification study for Kossler Dam and has confirmed that it has
moved from a Low Hazard Dam to a High Hazard Dam due to development in the downstream
inundation areas. In addition, a newly completed topographic survey has discovered that there is a
backwater effect on the spillway hydraulic capacity caused by the county road being
approximately 1 foot higher than the spillway crest. The city is updating the Kossler Dam Face
Rehabilitation Project design drawings to reflect the additional freeboard allowance to meet dam
safety requirements for a high hazard structure. Construction has been delayed from the originally
scheduled fall 2013 completion to the winter of 2014/2015.
An additional $150,000 budget is being considered to complete the spillway study and update the
planned Dam Rehabilitation design.
AGENDA ITEM # V; PAGE 5
Albion Dam Outlet Repair
The Albion Dam outlet was plugged in the winter of 2012 due to concrete material falling off (i.e.
concrete spalling) the upstream face of the dam above the trash rack and outlet pipe system. In
2013, divers successfully removed the concrete debris and placed a pipe stub to allow the outlet
system to properly function until the reservoir can be drained for a more permanent repair.
Unfortunately, the September 2013 flood event filled the reservoir to overflowing and thus the next
phase of the repair was not implemented. An additional $150,000 budget is being considered for
this repair work in 2014.
Silver Lake Dam Outlet Inspection
The State Engineer Office has requested the city to perform an inspection of Silver Lake Dam
outlet. Since this is a very important source, the city does not want to drain the reservoir and lose
valuable water supply storage in order to perform this inspection in the dry and will therefore
schedule a diving consultant to perform the inspection of the upstream components with the
reservoir at operational level. An additional $75,000 budget is being considered to perform this
inspection in 2015.
Goose Lake Outlet Inspection
The State Engineer Office has requested the city to perform an inspection of Goose Lake Dam
outlet. Since this reservoir is fairly small, the city can drain the reservoir with close coordination of
supply and demand on the system in a typical year with proper planning. Once drained, the city
can perform this inspection in the dry. An additional $20,000 budget is being considered to
perform this inspection in 2015.
Lakewood Hydro
Reprioritization of repairs to the Lakewood Hydro turbine and generator system are being
considered including moving the $100,000 currently budgeted in 2015 out to the year 2016. An
additional budget augmentation of $30,000 in year 2016 is also being considered for more
extensive part replacements.
Silver Lake Hydro
Due to ongoing repair requirements in keeping the Silver Lake Hydro b ypass valve operational,
$150,000 of funding in 2015 for a major rebuild of the valve is being considered.
Betasso Hydro
In 2013 the lower needle on the Betasso Turbine assembly was determined to be non-operational.
An additional budget of $100,000 in year 2014 is being considered for immediate repairs to allow
for a full range of operational flows and power generation. Considering the age of the unit
scheduled refurbishment of the major mechanical items may be required by the year 2017. An
additional budget of $250,000 is being considered in year 2017 for the major items.
AGENDA ITEM # V; PAGE 6
NEXT STEPS
Budget Schedule
The current schedule of major budget milestones is provided below. Elements involving the
WRAB are highlighted in bold italics.
WRAB Preliminary CIP Budget Discussion - April 21, 2014
Budget Guidelines to Departments - April 2014
WRAB Draft CIP Review - May 19, 2014
Proposed Budget Submittal to City Manager - May 2014
WRAB Recommendation on CIP/Budget - June 16, 2014
Departmental Budget Review by City Manager - May/June 2014
Planning Board Recommendation on CIP - August 2014
City Council Study Session on CIP - August 2014
City Council Study Session on Budget - September 2014
City Council Consideration/Adoption of Budget – October/November 2014