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�/ Building a world of differences. Executive Summary , .
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2010-1806
METRO WASTEWATER
Cr RECLAMATION DISTRICT
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Aregional wastewater treatment facility serving the northeastern portion of the Denver
metropolitan area has been a part of the Denver Regional Council of Governments'
(DRCOG's) Clean Water Plan since 1982. The Metro Wastewater Reclamation
District (Metro District) plans to construct the Northern Treatment Plant (NTP) to be that
regional facility. The NTP will provide reasonable, feasible and economical wastewater
treatment service to the Metro District's northeastern service area.
This Wastewater Utility Plan documents the NTP's potential impacts on the water quality of
the receiving waters and outlines the Metro District's plans for meeting environmental standards.
This document will be used to gain approval of the facility through local agencies, regional
planning agencies, and the Colorado Department of Public Health and Environment (CDPHE).
The information presented demonstrates that the NTP will allow the Metro District to fill a
critical regional need with a facility that includes the following features:
• Meet the needs of economic development and growth.
• Build advanced facilities, using proven technology and practices.
• Provide safe, reliable, and cost-effective treatment and transmission services.
• Extend environmental stewardship.
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Metro District's northeastern
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The Metro District has actively engaged
in environmental stewardship of the - -
South Platte River for decades. . t. -
Northern Treatment Plant Wastewater Utility Plan 1 - 1 Chapter 1- Executive Summary • June 2010
METRO WASTEWATER
lir ! RECLAMATION DISTRICT
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1 .1 General Planning
The NTP will be capable of providing wastewater treatment for portions of the City of Aurora
(Aurora), the City of Brighton (Brighton), Commerce City served by South Adams County Water
and Sanitation District (South Adams County), the City and County of Denver (Denver), and the
City of Thornton (Thornton), as well as potential future service areas. It will be constructed with
an initial average day annual flow (ADAF) capacity of 24 million gallons per day (mgd) on
a 90-acre site located in Weld County. The NTP site will be annexed into Brighton prior to
construction.
The South Platte Interceptor will be constructed as part of this project to convey flows from the
service area to the new treatment facility, and an Effluent Pump-Back System is planned to be
constructed to return a portion of Thornton's flow back into the South Platte River upstream of
the NTP discharge.
1 .1 .1 CONSOLIDATION OF FACILITIES
The NTP will result in significant consolidation of wastewater treatment facilities and
conveyance structures in the northeastern Denver metropolitan area, as listed in Table 1 -1 . The
NTP will augment and ultimately replace the Brighton Wastewater Treatment Plant (WWTP),
reduce flows to the Metro District's Robert W. Hite Treatment Facility (RWHTF), and reduce
future capacity requirements for the South Adams County Williams-Monaco WWTP. The NTP
also will allow the decommissioning of multiple wastewater lift stations at various locations,
resulting in an overall improvement to the reliability and safety of the conveyance systems.
The location of the facilities to be decommissioned is shown in Figure 1 - 1 .
TABLE 1.1
Facilities Planned to Be Decommissioned After NIP Startup
OWNER FACILITY
• Highpointe Lift Station
Aurora • First Creek Lift Station
• Second Creek Lift Station (planned, but not constructed)
Brighton • Brighton WWTP (within 20 years)
Denver • Gateway Lift Station°
Metro District • Brantner Gulch Lift Station
South Adams County • Lift Station No. 2
• Lift Station No. 1°"
Thornton • Todd Creek Lift Station
Private Agency • Sylmar Manor Mobile Home Park WWTP
"'These facilities potentially could be decommissioned in the future, but currently are not planned to be decommissioned.
Northern Treatment Plant Wastewater Utility Plan 1 -2 Chapter 1— Executive Summary • June 2010
METRO WASTEWATER
'i '._ 1 RECLAMATION DISTRICT
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1 .1 .2 ENVIRONMENTAL COMPONENTS EVALUATION
Metro District staff has been rigorously -r-
4 - . L k .rA . bit
firevaluating the environmental impacts of
P ,.
the NTP project components to ensure the Manor Ciffig 41; ; 4.
location, construction, and operation of Brighton .
Todd eon we
these facilities will have minimal impacts kta1r Brighton ,_ _ _.
to the environment. To date, this effort has I Thornton r i kw ., . lit. f.. . s
included a Phase I Environmental Site tirantnerCmml r
Assessment (ESA) of the NTP site and 60023 rj L
hazardous materials surveys of the �r South Adams county
pipeline routes. In addition, the NTP site ,,, OttCa Denver
and routes of the pipelines that are part of IP" International Airport
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this project have been evaluated for gere : � 4.. . �� Rocky
MountainI
wetlands, threatened and endangered Arsenal
; i • OHighpointe LS
species, and cultural resources. 1 . tic 0Gateway LS
Aurora
Addressing potential environmental Denver
QFirstCreek LS
impacts early in the planning stage
ensures that project decisions reflect the
Metro District's environmental values, FIGURE 1-1
avoids potential delays later in the Facilities to be decommissioned after the NTP is commissioned
process, and reduces conflicts. (LS = LIFT STATION)
1 .2 Northern Treatment Plant Siting
The site selection process for a regional WWTP began in 2001 . Two comprehensive site
evaluation studies have evaluated 11 sites for this facility. The site recommended by both of
these studies is located at the northwest corner of Highway 85 and 168th Avenue, which is the
site for the NTP. This site was chosen for the following reasons:
• Proximity to the South Platte River.
• Large enough site to have sufficient room for buffering, setbacks, future expansion
and other needs.
• Ability to be served by a gravity pipeline and minimization of wastewater pumping.
• Environmental suitability of the site and ability to obtain required permits.
• Avoidance of conflicts with other major utilities, drinking water facilities and
gravel mining/water storage facilities.
• Avoidance of unnecessary acquisition of productive agricultural land.
Northern Treatment Plant Wastewater Utility Plan 1 -3 Chapter 1— Executive Summary • June 2010
METRO WASTEWATER
RECLAMATION DISTRICT ;l
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1 .2.1 PUBLIC PARTICIPATION
Since 2001 , the Metro District's public participation efforts pertaining to siting a regional WWTP
have been extensive. Outreach efforts as of June 16, 2010, included three public meetings and
80 meetings with other stakeholders. The majority of the concerns voiced during these outreach
efforts include odor control, aesthetics and location. These concerns have been addressed with
the NTP concepts presented in this Wastewater Utility Plan.
1 .2.2 SITE CONSIDERATIONS
The NTP site is located and will be managed to minimize adverse effects on public health,
welfare, and safety. The Metro District is making a concerted effort to plan the NTP to blend in
with and bring additional benefits to the community. Current planning efforts include providing
natural buffers—such as trees and grassy areas, as well as a wetlands and natural channel—
between the treatment processes and the public. These measures, along with installing advanced
odor control systems, will help the Metro District operate the NTP relatively unobtrusively with
respect to odor, noise, and visual impacts. In addition, more than half of the treatment processes
at the NTP site will be enclosed or covered.
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architectural themes will reflect the current architecture " ' �_
The building '�
of nearby commercial developments.
The layout of the NTP is designed to minimize adverse effects on traffic. The public entrance will
be off 168th Avenue, rather than the more heavily traveled Highway 85. Conceptual plans for the
NTP site include a campus-style layout, with buildings designed to be architecturally similar to
current development in the surrounding community (in particular, the newly constructed Brighton
Pavilions commercial development located southeast of Highway 85 and Highway 7).
The Administration Building/Visitor's Center will provide opportunities for public education,
including information about the benefits of wastewater treatment. In addition, the Metro District
currently plans to extend or construct trails along the South Platte River and adjacent to the South
Platte Interceptor. Figures 1 -2 and 1 -3 depict conceptual site plans at Phase 1 and buildout,
respectively.
Northern Treatment Plant Wastewater Utility Plan 1 -4 Chapter 1- Executive Summary • June 2010
METRO WASTEWATER
RECLAMATION DISTRICT
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1 .3 Service Area FIGURE 1-2
Conceptual Site
and Projections Plan at Phase 1
(2015)
In order to effectively plan for the
facilities required, the quantity and 2.cr A ,,�
quality of the wastewater that will e� u
c..morrter no
be treated at the NTP must be
projected. The NTP is planned to ,,, ,
serve portions of the following I i Haadwo&s Plinr
areas: Aurora, Brighton, Denver, _ �.'" Prt ' la- .
South Adams County, and -
�! fti� * 'OAF
Thornton. Projections for these a, o
e i if Oenlutficnaton
areas were developed based on p«w,wrino st g° ii
information from Metro District
sfaucm ,
Member Municipalities that will a•�- •., I'S;le v.1
r;t ono D unfw:uan • •
uv
be served by the NTP, information
provided by DRCOG, and influent '
{_ I isis- _
wastewater data collected by the Enw•�t �t
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Metro District for the years 2000 • n:uWon ,
,
through 2008. The Metro District q W. .nKL
aliOnal
developed population and j - ci
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employment projections and Cwm itl{t.. pm .
otdnr Ink'Italian
corresponding wastewater flow ' .. BulWk►q ,t men3 ktihialll%.d*
and loading projections for the ,... I t
1St es.-: :
new NTP to ensure the facility has - ` ,� , _ ,; ;,t,,,, „
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adequate capacity throughout the
planning period. MD • t
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1 .3.1 SERVICE AREA �„mot arras
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With the addition of Brighton and South Adams County as Member • .1 , ,j,
Municipalities in June 2009, the Metro District's service area
increased from 615 to 715 square miles, with a corresponding INF it al $ N
increase in population from 1 .6 million to 1 .7 million. The initial f „/
Inn.
Gams
Croat at me
minasins
. iii char
FIGURE 1-3
Conceptual Site Plan at "'
buildout (after 2045)
Northern Treatment Plant Wastewater Utility Plan 1 -5 Chapter 1— Executive Summary • June 2010
METRO WASTEWATER
RECLAMATION DISTRICT
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service area for the NTP is shown on Figure 1 -4. !
Portions of the Metro District drainage basins \ Northern Treatment Plant Metro District
Service Area
that will be tributary to the NTP when it is [k Northern
Boundary
=righton
'
commissioned include the following: , , omt•nq
• The area approximately north of 118th Avenue ( - ms
encompassing the northern portion of Thornton. s ,; :u r„ Denver
41n
Robert W.Hi,- Al
• The area proximate to First, Second, and Theabne .F il•a
Third Creek Basins encompassing portions x •
---1
of Aurora and Denver. ?jig -161
• The area serving Brighton and South
Adams County that can flow by gravity [nib bah' 4
to the NIP. ekO
FIGURE 1-4 I j
Initial Northern Treatment Plant service area _ .
1 .3.2 1 .3.2 POPULATION AND EMPLOYMENT PROJECTIONS
Population and employment projections were used to forecast future wastewater conveyance and
treatment capacity requirements. Population and employment projections were developed by
each of the Metro District's Member Municipalities tributary to the NTP in five-year increments
from 2010 through 2035, as well as the buildout condition. Population equivalents were
determined from the population and employment projections using this formula:
Population Equivalent = Population + (17/85) * Employment
The resulting population equivalent forecast for each of the Member Municipalities for the
planning period is listed in Table 1 -2.
TABLE 1-2
Population Equivalent Projections for the NTP
MEMBER MUNICIPALITY 2010 2015 2020 2025 2030 2035 Buildout
Aurora 11 ,000 20,000 29,500 39,500 40,000 70,500 193,500
Brighton 29,000 33,500 36,500 42,000 49,000 56,000 86,500
Denver 500 500 500 1 .000 1 ,000 I 1 ,500 2,000
South Adams County 26,500 34,500 50,500 67,000 83,000 99,500 247,500
Thornton 60,500 69,500 87,500 105,500 114,000 122,000 172,000
Total 127,500 158,000 204,500 255,000 287,000 349,500 701,500
Northern Treatment Plant Wastewater Utility Plan 1 -6 Chapter I- Executive Summary • June 2010
METRO WASTEWATER
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1 .3.3 FLOW AND LOAD PROJECTIONS
Wastewater flow and load projections were developed for the NTP to ensure the facility has
adequate capacity throughout the planning period and will not be overloaded. ADAF and average
day annual load (ADAL) projections that were used for the facility planning of and sizing for the
NTP processes are presented in Table 1 -3. Peaking factors for flows and loads were developed to
adjust these average values for seasonal and daily peaks.
TABLE 1-3
Flow and Load Projections for the NTP
PARAMETER 2015 2020 2025 2030 2035 Buildout
ADAF"' (mgd) 13.4 17.3 21 .8 24.5 29.8 59.6
Biochemical Oxygen Demand (BOD)'=' 26,800 34,800 43,600 49,000 59,680 119,300
(pounds per day [ppd])
Total Suspended Solids (TSS)'=' (ppd) 26,800 34,800 43,600 49,000 59,680 119,300
Total Kjeldahl Nitrogen (TKN)'z' (ppd) 3,900 5,100 6,400 7,200 8,700 17,400
"'The ADAF projections are calculated based on a unit flow contribution of 85 gallons per day (gpd) per population equivalent.
"'The BOD, TSS, and TKN projections are ADALs. Projections were generated based on data from Member Municipalities and the
recent ADALs recorded at the RWHTF.
1 .4 Water Quality Characterization
ill
Anticipated federal, state, and local water quality regulations for
Proven technologies the streams and lakes that will receive treated effluent from the
and practices at the NTP NTP have been incorporated into this planning effort so that the
will protect the South,40 objectives of these regulations will not be adversely affected.
Platte River's aquatic HI These regulations will drive the level of treatment that will be
and will be adaptable required at the NIP and are expected to become more stringent
for future treatment in the future. This careful planning will ensure that the treatment
requirements. processes at the NTP will be protective of designated downstream
eisuses and water supplies.
Northern Treatment Plant Wastewater Utility Plan 1 -7 Chapter 1— Executive Summary • June 2010
METRO WASTEWATER
RECLAMATION DISTRICT
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1 .4.1 WATERSHED ISSUES
The impact of nutrients on the watershed will greatly influence the design and operation of the NTP.
The U.S. Environmental Protection Agency (EPA) first established nutrient water quality criteria in
1998 as a means to reduce excessive algae growth and the accelerated, cultural eutrophication that is
caused by it. CDPHE is developing criteria specifically for water bodies in Colorado, including total
nitrogen (TN) and total phosphorus (TP) limits. Milton Reservoir is located downstream of the NTP
and is on the State's 303(d) list of impaired water bodies. One recent study suggests strict limits for TP
discharges to the South Platte River are required to suppress algae production in the reservoirs so that
pH standards can be met. These regulations will require a significant investment in NTP processes to
remove TN and TP.
1 .4.2 PRELIMINARY EFFLUENT LIMITS
Treated effluent from the NTP will be discharged to Segment 15 of the South Platte River.
Extensive river modeling was used to determine the water quality-based effluent limits
(WQBELs) needed to maintain compliance with in-stream standards and to establish preliminary
effluent limits (PELs) that will be the basis for the discharge permit for the NTP. CDPHE issued
formal PELs in April 2010, and this information was used to develop the design criteria for
Phase 1 of the NTP. Potential discharge permit requirements for Phases 2 and 3 were then
forecast based on industry trends.
t
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ore—
The_
NTP will
protect the South
Platte River and
aquatic life.
Northern Treatment Plant Wastewater Utility Plan 1 -8 Chapter 1— Executive Summary • June 2010
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1 .4.3 CAPACITY STAGING
In order to construct the NTP in a cost-
effective manner, treatment processes will 65 _
be staged to provide adequate capacity for ss /
�,
a minimum 10-year period. The relationship , as '�
between the projected flows and the sa I
ga ��'�
proposed staging of the NTP is shown on u ss �'
Figure 1 -5. The projected flows and those o 25 , ''',�
"
parameters that are expected to have the 1540
greatest impact on the facilities required
5
at the NTP are included in Table 1 -4. §
FIGURE 1-5 t Year
Projected flow and proposed I --ADAF — Plant Capacity
treatment plant capacity
TABLE 1-4
Anticipated Plant Capacity and Permit Limits
PHASE 1 PHASE 2 PHASE 3
PARAMETER 2015-2025 2025-2035 BEYOND 2035"'
ADAF capacity (mgd) 24 32 48
Carbonaceous biochemical oxygen 17 17 17
demand (CBOD) (milligrams per liter [mg/L])
TSS (mg/L) 30 30 30
E. coli (No./100 milliliters [mLs]) 126 126 2.2
Protozoan cysts (No./100 liters [L]) — 7.5
Maximum chlorine residual (mg/L) 0.011 0.011 0.011
pH range (standard units) 6.5-9.0 6.5-9.0 6.5-9.0
Minimum dissolved oxygen (mg/L) 3 3 3
Total ammonia (mg/L as nitrogen [mg/L-N])
Daily maximum 2.28-24. 17 2.28-2.9 2.28-2.9
30-day average 1 .95-12.5 0.26 0.26
Daily maximum nitrate (plus nitrite) (mg/L-N) 10.0 10.0 10.0
Total nitrogen (mg/L-N)
Phasing assumption 6 3 3
Assumed range 3-8 3 3
Total phosphorus (mg/L as phosphorus [mg/L-P]) 0.5 0. 1 0.04
("Anticipated level of treatment was not estimated for buildout.
Northern Treatment Plant Wastewater Utility Plan 1 -9 Chapter 1- Executive Summary • June 2010
METRO WASTEWATER
RECLAMATION DISTRICT
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1 .5 Conceptual Design of Facilities
Alternatives analyses were completed for several liquid and solids stream treatment processes, as
well as potential interceptor alignments. The following is a summary of the selected alternatives
for each element of the project.
1 .5.1 RECOMMENDED LIQUID STREAM TREATMENT PROCESS
A schematic of the recommended liquid stream treatment processes that will be included in
Phase 1 of the NTP is shown on Figure 1-6. Subsequent phases will include expansions of these
unit processes and the addition of other treatment processes as required to meet future discharge
limits. Table 1-5 describes the proposed Phase 1 liquid stream treatment processes.
.�. v Discharge
_k :,,,---ii. -- �' _ —P _Lwit.._► to South
�� Platte River
Influent `_ Intermediate
Mechanical Pump Pump �� *'� Clearwell Ultraviolet
Grit Primary Aeration Secondary Disinfection
Screens Station Clarifiers Basins Clarifiers Station
Removal Deep-Bed
Filters
Centrate and Return
Activated Sludge
Reaeration Basins
FIGURE 1-6 Liquid stream process schematic for Phase 1
TABLE 1-5
Liquid Stream Treatment Processes for the NTP Phase 1 Construction
UNIT PROCESS DESCRIPTION PURPOSE
Mechanical Screens Remove inorganic solids that could harm downstream
Preliminary
Treatment Influent Pumps processes; raise the hydraulic gradient required for the NTP
Vortex Grit Chambers processes
Primary Clarifiers Remove organic and inorganic solids to reduce loading on
Primary Treatment
Primary Sludge Pumps secondary treatment
Aeration Basins
Secondary Secondary Clarifiers Remove BOD and nutrients utilizing an activated sludge
Treatment Return Activated Sludge biological nutrient removal (BNR) process
(RAS) Pumping
Side Stream Centrate and RAS Reaeration Convert ammonia from the sludge dewatering process
Treatment Basins (CaRRB) (centrate) to nitrate
Conventional Remove additional solids from secondary effluent and
Filtration
Deep-Bed Filters phosphorus that is precipitated after addition of a metal salt
Disinfection Low-Pressure/High-Output Neutralize pathogens in final effluent
Ultraviolet (UV) Lamps
Northern Treatment Plant Wastewater Utility Plan 1 - 10 Chapter 1- Executive Summary • June 2010
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, METRO WASTEWATER
RECLAMATION DISTRICT
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Finished effluent from the NTP will flow through a
constructed wetlands and an extended natural _ _ _ _ _ _
channel along the south end of the site to mimic I.
the natural waterway of the South Platte River. . - '
' i fi it
The wetlands and channel will improve habitat and ' • _, • 1° ' 'i� ' "i4 4"
'
will act as a natural buffer to minimize odor, noise, #. , ' ';
y
and visual impacts along Highway 85 and 168th 1: ;'
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Avenue. As the flow exits the natural channel and - .
joins the South Platte River, it will have the appear-
ance of a natural waterway when viewed from the p 4 -,1-.re- - 9 .+ S
tip ,trail that runs adjacent to the river. L r
Extended channel will mimic NA*, it
iti't it k -
a natural waterway. -
1 .5.2 RECOMMENDED SOLIDS STREAM TREATMENT PROCESS
A schematic of the recommended solids stream treatment processes that will be included in
Phase 1 of the NTP is shown on Figure 1 -7. Subsequent phases will include expansions of these
unit processes and addition of other treatment processes as required to meet future biosolids
beneficial reuse goals. Table 1 -6 lists the proposed Phase 1 solids stream treatment processes.
Primary
Sludge Secondary
Sludge
I■i -
• W •
\/ • - •
oe • • •
• • •
Gravity - I _
Thickeners \...... - ;t" q'.�...�. •M• ............. ... Land
........%%%%%%% W
............... . Application
or Private
Sludge Sludge Gravity Belt Dissolved Pm-Digestion Anaerobic Post-Digestion centrifu es Composter
g
Screens Fennenters Thickeners Air Flotation Storage Digesters Storage
Thickeners
FIGURE 1-7
Solids stream process schematic for Phase 1
Northern Treatment Plant Wastewater Utility Plan 1 - 11 Chapter 1- Executive Summary • June 2010
METRO WASTEWATER
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InTABLE 1-6 Nu
Solids Stream Treatment Processes for the Northern Treatment Plant Phase 1 Construction
UNIT PROCESS DESCRIPTION PURPOSE
Primary Sludge Gravity Thickeners Thicken primary sludge prior to digestion and to minimize
Thickening Primary Sludge Pumps volume of fermenters required
Fermenters
Primary Sludge Gravity Belt Thickeners (GBTs) Produce carbon source to recycle back to the liquid stream
Fermentation Thickened Sludge Pumps process and enhance biological phosphorus removal
Dissolved Air Flotation Thicken the waste activated sludge (WAS) prior to
Secondary Sludge
Thickeners (DAFTs) digestion to reduce the volume of digesters required and
Thickening
Thickened Sludge Pumps ensure the digestion process is viable
Pre-Digestion Storage Tank Allow uniform feeding of the digesters
Storage Digester Feed Pumps
Produce biosolids through reduction of volatile solids;
Digestion Anaerobic Digesters
generate methane gas
Post-Digestion Storage Tank Allow uniform feeding of centrifuges
Storage Centrifuge Feed Pumps
Biosolids Centrifuges Dewater biosolids to cake; provide storage of cake
Dewatering Storage Tank prior to land application or private composter
1 .5.3 SOUTH PLATTE INTERCEPTOR
The preferred alignment for the South Platte Interceptor is shown on Figure 1-8. The alignment
is approximately 7 miles in length and ranges in diameter from 42 to 84 inches. The preferred
alignment follows Riverdale Road from the Brantner Gulch Lift Station to 136th Avenue. The
alignment then proceeds east and crosses the South Platte River just south of Highway E-470.
As the interceptor continues north, it follows the east side of the South Platte River, crosses
Highway 7, and enters the NTP site. This preliminary alignment will allow wastewater flows
from Member Municipalities to be collected in an efficient and cost-effective manner and
conveyed to the NTP site by gravity.
Northern Treatment Plant Wastewater Utility Plan 1 - 12 Chapter I— Executive Summary • June 2010
METRO WASTEWATER
RECLAMATION DISTRICT
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Northern,
Treatment
Plant
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168th County Rd-2
�asellne Pump Station
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0160th 1Brid i
- 180th i 14 i jll -4r�1 ' C '71
i southern hi tts
152nd
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2
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South PlatteI
�y `� `
Interceptor ( , r
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1 h
Existing Brantner Gulch Lift Station / - f-
;ti _04 E Existing Brantner i'
i i_ Gulch Interceptor / /�
o )1280 C. f , , — TrT
4,it ----z-----7---", \et — - 4!) /).
-(11 ;a* IP
Effluent Pump- ac , T 120th \�-, . IForce Mein i ' � xv1-
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ta I I j / ( . I ( LS-.)"
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4l:.rs'►c1j t/f / % Legend
2 Pipelines Roads
44 I ®South Platte Interceptor(New) = Limited Access
-. ' ®Effluent Pump Back Force Main (New) Highway
ac. , , 2 Fulton Ditch /
Headgate >Brantner Gulch Interceptor Major Road
WdI-_1 Facilities Minor Road
NTP I I Water Bodies
96th i •
/ Effluent Pump Station
�,. $ NI Existing Lift Station
ti N
W�E 0 7,000 1a 1000
t 1 T1 I Feet
4/ 1111 1
FIGURE 1-8
Preliminary alignment of the South Platte Interceptor and Effluent Pump-Back Force Main
Northern Treatment Plant Wastewater Utility Plan 1 -13 Chapter 1— Executive Summary • June 2010
METRO WASTEWATER
RECLAMATION DISTRICT
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1 .5.4 EFFLUENT PUMP-BACK SYSTEM
In order to mitigate the water rights impact of moving the point of discharge for a portion of
Thornton's flows from the RWHTF to the NTP site, an Effluent Pump-Back System has been
planned as part of this project. The system would consist of a 30-cubic feet per second pump
station located at the NTP site and an approximately 11 -mile force main. Thornton's portion of
NTP effluent would be pumped through the force main and discharged at a point above the
Fulton Ditch Headgate on the South Platte River (near 100th Avenue and Brighton Road). The
remainder of the NTP effluent would be discharged to the South Platte River.
The force main alignment is shown on Figure 1-8. From the NTP, the force main shares the same
alignment as the proposed South Platte Interceptor south to approximately Highway E-470. At
that point, it continues south along Brighton Road to the Fulton Ditch Headgate. A potential
effluent swap between Aurora and Thornton could provide an alternative water rights solution
and eliminate the need for this Effluent Pump-Back System.
1 .6 Management and Financial Plan
The Metro District is responsible for the management and operation of the NTP. Since 1961 ,
the Metro District has relied upon sound financial and management strategies to fund capital
improvements, operate facilities to the highest standards, and maintain its facilities in excellent
working order. Inclusion of the NTP within the framework of assets owned and operated by the
Metro District will ensure that the required capital improvements are constructed in a timely
manner consistent with the projected flows and loads. The existing management, legal and financial
planning expertise of the Metro District will be employed to ensure that the necessary resources
are available to operate and maintain these facilities effectively once they are constructed.
The Metro District conducts
financial planning on an annual basis
for each fiscal year's anticipated
expenditures and revenues. In
addition, the Metro District relies on
facility-specific plans for long-term 39% LESS
forecasting of capital expenditures.
This Wastewater Utility Plan will
Comparable
serve as such a plan for the NTP sk U.S.
Program by outlining the required Wastewater
facilities, the capital budget required Treatment
by y ear, and the anticipated = 2008 . Utility Rates � asirts
operating costs. Metro
District Rates
The Metro District charges rates that are
significantly lower than the national average.
Northern Treatment Plant Wastewater Utility Plan 1 - 14 Chapter 1— Executive Summary • June 2010
r'4ETRO YVASTErl/ATER'
RECLAMATION 0/ST Rl 1'
J o
O nal;
INA
Total project cost estimates (TPCEs) were developed for each of the major elements of the
NTP Program—the treatment facility, South Platte Interceptor and Effluent Pump-Back
System. The costs developed as part of this Wastewater Utility Plan are considered Class 4
TPCEs as defined in Metro District's Cost Estimating Guide. This level of estimate is
generally referred to as Facility Planning and is expected to be accurate to between plus
50 percent and minus 30 percent of the actual construction cost. The TPCEs for each element
are summarized in Table 1 -7. These costs will be refined to a greater level of accuracy as each
element progresses through the design phases.
TABLE 1-7
Total Project Cost Estimate for the NTP Program
PROGRAM ELEMENT TPCE (million)
Northern Treatment Plant Site Preparation $3
Northern Treatment Plant Phase 1 $362
South Platte Interceptor $71
Effluent Pump-Back System $37
Total $473
The Metro District's Ten-Year Capital Expenditure Schedule has been updated to reflect
scheduling and cost projections for the NTP Program.
The Metro District is committed to providing advanced,
cost-effective facilities for its communities while extending its history
of environmental stewardship.
Northern Treatment Plant Wastewater Utility Plan 1 - 15 Chapter 1— Executive Summary • June 2010
METRO WASTEWATER `r
RECLAMATION DISTRICT
i
Se lir'
1 .7 Implementation Plan
Construction of the first phase of the NTP and its associated conveyance infrastructure is
scheduled to be completed by December 31 , 2015. This completion date is required to meet the
treatment and conveyance needs of the Metro District and its Member Municipalities, since some
of the facilities which will be taken out of service when the NTP is commissioned will be
reaching capacity by this date.
As part of the planning for the NTP and its associated conveyance infrastructure, the Metro District
has evaluated project delivery alternatives for project implementation. Based on this analysis, an
implementation schedule was developed for the NTP site that uses a design-build approach to
delivering the treatment plant. This approach was chosen to construct this complex facility in a
relatively short time frame, with early definition of the total project costs and the flexibility to
select equipment and materials based on factors other than lowest first cost. As part of the delivery
analysis, the Metro District has concluded that the South Platte Interceptor and Effluent Pump-Back
Force Main could be delivered using a more traditional design-bid-build approach.
Timeline of Starting Dates
2010 2011 ,E p. " ► r ' '�� % fJ
. n ins
Desiin
Plant Construction
Pile Construction
The implementation plan for the NTP Program. Sta rtu
Northern Treatment Plant Wastewater Utility Plan 1 - 16 Chapter 1— Executive Summary • June 2010
Elizabeth Strong
From: Vicky Sprague
Sent: Wednesday, July 28, 2010 1:00 PM
To: Dacono City Hall (euckert@ci.dacono.co.us); Dacono Mayor; Joe Wilson; Nancy Parker,
Town Clerk; Firestone Mayor; Firestone Town Hall; Barbara Rodgers; T Holton; Frederick
Mayor; nfornof@frederickco.gov; clerk@hudsoncolorado.org; Hudson Mayor; Brighton City
Hall; Brighton mayor ; Platteville mayor and manager; heneger@plattevillegov.com;
mary.kent@cityofthornton.net; Thornton Mayor; Northglenn City Hall (jsmall@northglenn.org);
Northglenn Mayor
Cc: Commissioners; CTB; Trevor Jiricek; Kim Ogle; Mark Thomas; Mark Wallace; Biggs, Barbara;
Bruce Barker; Monica Mika
Subject: Metro Wastewater Reclamation District
Dear Mayors of Dacono, Erie, Firestone, Ft. Lupton, Frederick, Hudson, Brighton, Platteville,Thornton, and Northglenn:
The Board of Weld County Commissioners invites you to a presentation by representatives of the Metro Wastewater
Reclamation District concerning their proposed wastewater treatment plant. They will discuss the Utility Plan and Site
Application submitted to the North Front Range Water Quality Planning Association for the wastewater treatment plant
proposed to be located near the intersection of WCR 2 and Highway 85. The presentation is scheduled during our board
meeting August 9, 9:00 a.m., in the first floor hearing room of the Weld County Centennial Center, 915 10th Street,
Greeley.
If you have questions, please call Weld County Planning and Zoning Director Trevor Jiricek at 970-304-6415, Extension
2214. We hope you can attend.
Vicky Sprague, Office Manager
Board of Weld County Commissioners
915 10th Street, 3rd Floor
P. O. Box 758
Greeley CO 80632
Telephone: 970-336-7204
Fax: 970-352-0242
vspraque(a)co.weld.co.us
1
PUBLIC NOTICE
The County of Weld will conduct a public hearing at 9:00 a.m., on Wednesday,
August 11, 2010, in the Chambers of the Board of County Commissioners of Weld County,
Colorado, Weld County Centennial Center, 915 10th Street, First Floor, Greeley, Colorado. The
purpose of the hearing is to allow citizens to review and comment on the Northern Treatment
Plan Wastewater Utility Plan and Site Application submitted by the Metro Wastewater
Reclamation District.
Written comments are also welcome and must be received by August 10, 2010, in the
office of the Clerk to the Board, 915 10th Street, P.O. Box 758, Greeley, Colorado 80632.
Information and records regarding the above described project are available at the office of the
Clerk to the Board of County Commissioners, located in the Weld County Centennial Center,
915 10th Street, Third Floor, Greeley, Colorado, Monday through Friday, 8:00 a.m. to 5:00 p.m.
Advance notice is requested.
Please contact the Clerk to the Board's Office at phone (970) 356-4000, Extension 4225,
or fax (970) 352-0242 prior to the day of the hearing so that reasonable accommodations can
be made if, in accordance with the Americans with Disabilities Act, you require special
accommodations in order to participate in this hearing as a result of a disability.
BOARD OF COUNTY COMMISSIONERS
WELD COUNTY, COLORADO
DATED: August 6, 2010
POSTED: August 6, 2010, on the Weld County Website
Elizabeth Strong
From: Biggs, Barbara [BBiggs@mwrd.dst.co.us]
Sent: Thursday, August 19, 2010 12:58 PM
To: Elizabeth Strong
Subject: RE: Presentation given on 8/9 to Weld County Commissioners
Elizabeth,
The Metro speakers were Bill Brennan, Northern Treatment Plant Program
Manager, and me, Barbara Biggs, Governmental Affairs Officer. Renee
Paplow, Comprehensive Planner, assisted with the program.
I will need to follow up with Bill on the presentation, but one of us
will get back to you with a copy.
Original Message
From: Elizabeth Strong [mailto:estrong@co.weld.co.us]
Sent: Thursday, August 19, 2010 12:49 PM
To: Biggs, Barbara
Subject: Presentation given on 8/9 to Weld County Commissioners
Ms. Biggs,
I was the clerk at the public input hearing conducted on August 9 for
the Metro Wastewater Reclamation District and I am hoping you might be
able to help me with a couple matters. The first thing I am hoping you
can help me with is providing a list of the names of the people who
spoke at the meeting so I can be sure I am spelling each name correctly
in the minutes, and the other thing is that I am hoping you can either
e-mail a copy of the presentation to me or mail a copy of a cd
containing the presentation. Trevor Jiricek gave me a cd which he
believed the presentation had been recorded on, but the cd ended up
being blank when I tried to review its contents so the presentation was
not successfully recorded. Please let me know if you have any questions
and thank you for your time!
Elizabeth Strong, Deputy Clerk to the Board N e
(970) 356-4000 extension 4219
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