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Home My WebLink About20013411.tiff at Aa AREAWIDE WATER QUALITY MANAGEMENT PLAN 2001 UPDATE .1i, a :.1 .. ^. •�,:� ` b r .79.', b.S.\,C L 44 .if r.. Xr ft l� ;stir* 3�.. C y(1 iP,�1y; M.. : rlio Yi , ; - • F r)y�l��yay{ q w •,S '1' i : '• ' fi �l ,+ t .. ` J ALT� 1 , l` t j 11.1 ��'r \ .� ♦ 5 yT l.l 44$/*", I - '.'i 'r4. 5 s' i r` • "l. \ \ T I l ' I. r— NORTH FRONT RANGE WATER QUALITY PLANNING ASSOCIATION ,, C4Sr-y17— 4 Pnr✓ct Ii. ,-- 6,(--:--)C1 TABLE OF CONTENTS Chapter EXECUTIVE SUMMARY 1. MUNICIPAL POINT SOURCE DISCHARGES I-1 A.MUNICIPAL POINT SOURCE INVENTORY 1-2 ^ CACHE LA POUDRE RIVER BASIN 1-2 Ault 1-2 Goxelder Santation District I-4 Eaton 1-9 Fort Collins 1-10 Fox Acres 1-12 Greeley 1-13 ^ Severance 1-14 Satoh Fort Collins Sanitation District 1-15 Wellington 1-18 Windsor 1-17 BIG THOMPSON RIVER BASIN 1-18 Berthoud 1-18 .01 Berthoud Estates 1-21 Estes Park Sanitation District 1-21 Johnson's Corner 1-23 Johnstown 1-23 ^ - Lowland 1-24 Milliken 1-28 Riverglenn 1-27 Upper Thompson Sanitation District 1-27 Western Mini RanchesNaquero Estates 1-28 SAINT VRAIN CREEK BASIN 1-28 Dacono Sanitation District 1.30 Erie 130 Longmont k32 Mead 1-33 Saint Vrain Sanitation District 138 Weld County Tri-Area Sanitation District 1-37 SOUTH PLATTE RIVER BASIN 138 Evans 136 Fort Lupton 1- 41 Gallon Water and Santation District I-00 Gilcrest 1-41 ^ Grow 1-41 Hill-N-Park Santation District 1-42 Hudson I-42 Keenesburg I-C Kersey 1-44 La Salle 1-44 ^ Lachbuie 1-44 Pierce I-08 Platteville 1-08 Weld County School District RE-3J 1-47 BIG DRY CREEK BASIN(Weld County) 1-47 Broomfield 1-47 Nathglenn I-50 Regional Facility 163 B.DATA SHEETS 8 SERVICE AREA MAPS 1-56 II.INDUSTRIAL PERMITTED POINT SOURCE DISCHARGES it-1 APPENDIX A-ISDS SURVEY A-1 APPENDIX B-UTILITY PLAN GUIDANCE B-1 EXECUTIVE SUMMARY The 2001 Update of the Areawide Water Quality Management Plan (208 Plan)for Larimer and Weld Counties (Region 2) has been prepared by the North Front Range Water Quality Planning Association (NFRWQPA)as part of the continuing 208 Plan update process. The NFRWQPA has now been the responsible 208 Areawide Water Puality Management Agency for over fourteen years. This update addresses specific water quality topics which are a priority in the region and wastewater management issues which have changed since the last update was completed in 1999. A major feature of the 2001 208 Plan is a complete update of information on all municipal point source discharges, including a description of facilities and their status, data sheets describing the major statistics on each, and a service area map for each. The service area maps have been prepared using GIS technology and are much improved over those used previously. This section incorporates all amendments made to the Plan since 1999 up through October of 2001. The data sheets were revised to include all changes made through site approval applications and updated population projections. Also continued this year is a description of the operations and treatment facilities of the major permitted point- source industrial dischargers. Appendix A contains the results of the individual sewage disposal systems (ISDS) survey conducted in the Big Thompson River Basin above the mouth of the canyon. The object of the survey was to quantify the number of ISDS in use in the watershed above the point of diversion for the major domestic water supplies in this area. It was accomplished with the cooperation of the Larimer County Department of Environmental Health and the Big Thompson Watershed Forum. The survey concludes that there are about 1,800 permitted systems in use in the basin, with about 400 of those being designed as vault or contained systems. The next step should be to determine the proximity of the ISDS systems relative to surface waters in the watershed. ii .. In Appendix B, the Association's Utility Plan Guidance Document is presented. This guidance manual was adopted by NFRWQPA on June 22, 2000. It sets forth the planing steps, criteria, facilities and financial and service area issues that should be considered ^ by an operating entity in preparing a master plan for a wastewater utility. If an operating agency wishes to prepare such a master wastewater plan, NFRWQPA will review it, and if accepted, will use it for expediting consideration of future site approvals and plan amendments. gea .. "i,, r 2 _ Grover ; ) ' a Fox Acres �= .. -• y d1v ) Cache la Poudre I „ • L- 3 River Basin , �` . • ' • . . , is '' a €` + ,. r 'I ) ♦ 1 \ I ', 1 "'t \ ` 7 ,e • • 7. - el•) .,� Boxelder ''• , • ) ii. Pierce ) ,y+•'"M.. '`•.w,aU,,„uM.,y,„C Forth �« (s ' .. t^.,✓° .u.c Colllr . Ault Big Thompson 1iitaat" �_' • ' - • ; 9 P @ Severance �x �'� River Basin ''' - rr i a - •t. nnpunlq,r`nnP ♦ , M < 1 Galeton , ) South i� - • - • Fort o� Collins =' i �,t i 1Greeley5 l �PPer ' = South Platte 4rAli . ) Thompson 'Qhnst.wn River Basin Loveland '0'.% Estes1414410 - Park _ q4 ,,......„,„,, / reriej•at• Little Thompson'"'•'.,,,.1. .4 'ri ! vt' • La4all2 J ..ti River Basin ..t ,. # ,• �' *re ' - .+,u. ‘,,w�'+`� Berthoud _, . ) rimer Co . � Gilcrest = +FLa ' - u_ --- _.._-q _ +'„ Milliken Boulder County ��Y-0,714-- i•4o "'+n .,) a T b'' - f,•' tip : 1 _ • � 1 u • North Front Range Illir y, 1 • Water Quality Planning Association �< LARIMER-WELD REGION L.ngmont ♦/ " 5t. YEAR 2001-2002 Creek Basin • Vrain� i - Keecesburg SANITATION DISTRICTS lier t. Vrain . 7' e1 ,Weld Co. , Fort Lupton 12-3-01 LOCATION MAP Tri-Areata ,..' '",.,,. ". Drainage Basin Boundaries Mop Area 1 - ✓--_. • _ ' _! 1 s • a, - . :Lochbouie; ' Sanitation Districts • fr Colorado �� I I Broomfield -::-Jrr'^gienn -1 Adams County -� -- - 5 • 5 _ y • Weld County�.I 1 MILES I. MUNICIPAL POINT SOURCES AND MANAGEMENT AGENCIES Introduction - The status of each municipal point source discharge and management agency in the region is presented in this chapter, listed by river basin. A discussion of the facilities at each wastewater treatment plant is included, along with an updated point source inventory data sheet and a current service area map for each discharging entity. New or expanded facilities and treatment levels are listed as well as any anticipated near future needs. Projections of when the facilities will reach 80% and 95% of their design capacity are made. Oink The service area maps outline the boundaries of the areas for which the operating entity ^ will be responsible to provide wastewater service in the foreseeable future. Any change in these boundaries will require an amendment to the plan unless it is a minor adjustment involving less than ten acres. No overlaps in service area boundaries are allowed by the plan unless there is in existence an agreement between the involved service entities as to how service will be provided to the overlap areas. Loveland and the South Fort Collins Sanitation District have such an agreement as do Wellington and Boxelder Sanitation District. "" The information in this chapter updates that which is included in Chapter VI -"Point Source Status" in the 1985 water quality management plan and in Chapter I - "Municipal Point ... Sources" in the 1999 update of the plan. It therefore incorporates into the plan all amend- ments to the plan which have been made since the 1999 update through October 2001. The facilities are discussed in alphabetical order by river basin. - 1 A. MUNICIPAL POINT SOURCE INVENTORY CACHE LA POUDRE RIVER BASIN The Cache Ia Poudre River drains the major portion of Northern Larimer County and the northwest portion of Weld County. Municipal discharges in the basin include Ault, Eaton, Fort Collins, Fox Acres, Greeley, Severance, Wellington, Windsor and the Boxelder and South Fort Collins Sanitation Districts. Figure I-1 depicts the Cache Ia Poudre Basin and locates the major discharges. A study completed in 1998 investigated alternatives to cooperatively provide service to the regional area between Fort Collins and Windsor. Participants in the study were Fort Collins, Windsor, Timnath, Boxelder Sanitation District, South Fort Collins Sanitation District, and Larimer County. The study recommendations were that the individual entities expand their own facilities as additional capacity is needed in the short term, but that the Boxelder and South Fort Collins Districts may experience savings if they cooperated in a joint subregional plant in the long term. Ault Ault's treatment plant is located one-half mile south of town in the NW% of the SW % of Section 13. In addition to the collection system, wastewater facilities include a bar screen, grit chamber, Imhoff tank, a single-cell waste stabilization pond, and a percolation pond. Plant flows average approximately 90,000 gpd, and the design capacity of 0.12 mgd should be adequate for another year. With growth that is expected in the town, Ault plans to make interim improvements to the treatment plant in 2001 to increase the hydraulic capacity to 0.148 mgd and the organic capacity to 315 1 - 2 ) &S2B ' 1in FIGURE I-1. a T fl ' r 77 ° rli r! CACHE LA POUDRE RIVER BASIN ) •_� �'I I ' : l i � MUNICIPAL DISCHARGES > 1 • o z I I1: � 12-3-01 -\I I l',--E SERVICE AREA i,*l I WIlingtoni TREATMENT PLANT T • I it- r I � II ' r' l 1 0 5 ) I -0 I i MILES • . . I I ` G . I I � Ca, COLO-14 i ; �. • �, �i . j70 i it a. a ) \ 4_ � ,`� 1 '` • Boxelder Ault: '1II�I1- Fort Collins � ` I • i ,‘16 :71N: •°w _ Severance f ' \\\\\\� ~ � ♦ , Eaton / y ` A N 1 • 1'1" ! COLO-392 • Frt CIlins ;uth a . Windsori it C CHE 'l i ‘ 41- /.. _ _ _ _ _ _ . ill • •• U5 34 - ` ` • a Ma- 1 U5-34 1 if I-3 lbs./day. The Town plans to make additional improvements to increase the plant capacity to 0.250 mgd when needed, probably before 2005. Boxelder Sanitation District Since 1965, this special district has served an area located east and north of Fort Collins, along the east side of LeMay Avenue and east of the Cache la Poudre River. Currently, the existing Boxelder Sanitation District treatment plant is located alongside the confluence of Boxelder Creek and the Cache la Poudre River. This existing treatment plant will be utilized to serve a much larger area than in the past. The larger service area will extend north to the Town of Wellington's existing service area generally along LCR 58 to the easternmost area and LCR 60 on the west toward the foothills. It will overlap Wellington's service area in sections 7, 8, 4, 15, T8N, R68W and Section 12, T8N, R69W, as per an IGA with the Town of Wellington. The Boxelder Sanitation District service area will border, generally, the Cherry Hills Sanitation District and the City of Fort Collins on the west. On the east, the district service area extends into Weld County where there is not another service entity. On the south, the anticipated area to be served extends to LCR 38 & 40 and generally is expected to approach the Town of Windsor on the southeast. Through formal and informal arrangement, it is expected that there will be some consideration given to cooperative planning with possibly both the Town of Windsor and the South Fort Collins Sanitation District on the south and with the Town of Wellington on the north to determine the most I - 4 economical and expedient manner to serve properties of interest. The District will continue cooperation with other wastewater treatment entities. The District Board of Directors has determined that planning for a second treatment (WWfP), near the southern portion of the area the district has committed to serve, should proceed. Planning will include land control, site application submittals, and preliminary engineering in accordance with existing regulation and statues applicable to the approval process. This facility would be located so that it can provide wastewater treatment to properties in the vicinity of Harmony Road and the east side of 1-25, in accordance with the District's Utility Plan. The District Utility Plan was revised in 2001 to include a description of the existing treatment facility, anticipated upgrades and improvements, expansion of existing collection and treatment systems, and investigations of financing mechanisms to bring there expansions to fruition. The Utility Plan reaffirms the intention of the District to proceed with the process of review and approval of the WWfP#2 facility within the next two years. It ^ also considers the possibility of reuse of treated wastewater for landscape irrigation. .. As a result of Board actions, the District has the following projects planned: 1. Wastewater Pumping Stations: Wastewater pumping stations and accompanying pressure sewer systems may be constructed in the following locations: a. In the proximity of Section 24, Township 7N, Range 68W to serve properties in the Timnath Reservoir Watershed. 1 - 5 b. In the SEA, Section 8, Township 7N, Range 68W, to serve properties between Lake Canal and State Hwy. 14. - c. In the NE%, Section 2, Township 6N, Range 68W, to serve a set of properties in the vicinity of Larimer County Rd. 3 and Harmony Road. d. In the area east of Interstate 25 and west of Larimer County Road 5, south of the Poudre River near its 1-25 bridge, and north of Larimer County Road 34. e. In the area to the west of the Poudre River, north of Horsetooth Road, and east of Larimer County Road 9. Additionally, the existing wastewater pumping station at CDOT is to be enhanced for a larger hydraulic capacity. Other pumping stations may be needed at locations not readily served by gravity sewer. ^ 2. Treatment Plant Expansion: There will be an enhancement of the existing wastewater treatment facility located in Section 28, Township 7 N, Range 68W. This potentially includes, among other things, an experimental constructed wetlands treatment system, an additional chlorine contact basin, a revwrking of the influent works, additional aeration capability for the existing lagoons, a modification of the treatment process to treat wastewater for ammonia, nutrients and other pollutants—along with treatment of BOD, TSS and conventional pollutants—in anticipation of possibly more restrictive water quality -� regulations. Work on the enhancement of the electrical infrastructure at the plant, modification of the effluent structures and monitoring devices, potential removal of wastewater sludge from the lagoons, and construction of a 1 - 6 wastewater sludge from the lagoons, and construction of a maintenance building will be completed in the short term. 3. Collection System Enhancement: A study of the collection system and identification of potential sites of infiltration and inflow has been carried out. The District intends to build on this database a program for reduction, and possible elimination, of much of the infiltration/inflow for various segments of the collection system. This may include replacement and/or repairs to various segments of the collection systems and installation of alternative collection systems (e.g., vacuum systems) in hard-to-serve areas. Major new collectors are anticipated to be put into place to serve the existing plant. These include: a. Boxelder Interceptor extension (to serve East Basin) b. Poudre Interceptor extension ( to serve West Basin) c. Cooper Slough Interceptor extension (to serve West Basin) d. Prospect Collector (to serve East Basin and Timnath Lake Basin). e. Timnath Lake interceptor (to serve Timnath Lake Basin). In addition, collectors would be installed for the proposed (new) treatment plant to serve the New Timnath Basin, the Poudre Riparian Basin, and to serve as relievers to the CDOT Lift Station Basin. Force main replacement and/or expansions are also contemplated for some of the existing wastewater pumping stations. I - 7 4. New Treatment Plant: The District intends to exercise its option of siting a new wastewater treatment plan and obtaining an NPDES permit for a facility which would potentially serve the following areas: Properties in the vicinity of Harmony Road and on the east side of 1-25, on the basis of landowner petitions for inclusion into the district; and an area bounded on the south by(extended) Larimer County Road 34, and west by 1-25, extending north to State Highway 14 and generally east to Weld County Road 19. The siting of the new treatment plant would assist in the elimination of one or more of the lift stations presently contemplated for construction. The treatment plant, as presently envisioned, could potentially be a small temporary lagoon or a package plant that is designed in accordance with State requirements. As the flows increase to approximately 1 mgd, or if water quality considerations demand so, a full-fledged mechanical wastewater treatment plant is contemplated as a replacement for the package plant or lagoon. 5. District Infrastructure Protections; The District is likely to continue its work on the protection of its infrastructure (flood proofing plant site and collection systems components) that is described in the 1999 update to the North Front Range Water Quality Planning Association Management Plan. The District's existing treatment facilities consist of two aerated lagoons and two polishing ponds, followed by chlorination and dechlorination. Discharge is to Boxelder Creek just above its confluence with the Cache la Poudre River. The rated capacity of the plant is 2.34 mgd and 3,200 lb. BOD5/day. 1 - 8 Currently wastewater flows average about 1.7 mgd, and the District has adequate capacity for projected growth for 15 to 20 years for those parts of the service area that are north of Larimer County Road 40 and west of Weld County Road 17. r The District will submit a site application for enhanced treatment capacity at the existing plant, which will include upgrades of the existing treatment system, to increase the hydraulic capacity to about 4.5 mgd and organic capacity of up to 6,000 lb. BOD5/day. Eaton Sewerage facilities for the Town of Eaton consist of secondary treatment in an oxidation ditch, clarification, chlorination, and aerobic sludge digestion. The design capacity of the plant is 0.34 mgd, present flow is about 0.15 mgd, and capacity flows are not expected for about 10-15 years. The Town in- .. stalled locally funded improvements to the sludge handling facilities, includ ing additional sludge drying beds, and they improved aeration capability in a a the oxidation ditch. The discharge is to Eaton Draw, which is tributary to the Cache la Poudre River. The Town does provide service to the East Eaton Water and Sanitation District. The District contains 52 residences. Two new large subdivisions have been approved in the southern portion of Eaton, Govenors Ranch and Maplewood, and each will require a lift station for service. Site applications for those lift stations have been submitted. Eventually, the treatment plant will need to be expanded or replaced; and if it is relocated downstream, the Maplewood lift station would not be required. t - 9 Fort Collins The City of Fort Collins is the designated Management Agency for the area within its Urban Growth Area (UGA) Boundaries. An intergovernmental agreement between Larimer County and Fort Collins specifies the responsibilities of each in relation to approval of developments that are in the UGA and not within the city limits. Fort Collins and Larimer County accepted the responsibility of designated management agencies in 1978. The intergovernmental agreement (IGA) establishing the UGA was adopted on May 1, 1980, and last revised on September 7, 199. Interagency agreements have been adopted between the City and special districts in its area of jurisdiction. Fort Collins has two municipal sewage treatment plants. The Mulberry Water Reclamation Facility (MWRF) treatment processes include primary sedimentation, trickling filtration, intermediate clarification, and activated sludge secondary treatment in series, followed by secondary clarification, and disinfection. The plant has a permitted capacity of 6 mgd, and flows can be diverted to the Drake Water Reclamation Facility (DWRF) via an interceptor. Presently MWRF is being base loaded at a flow of approximately 4 mgd, and excess flows are diverted to DWRF. DWRF has a total permitted capacity of 23 mgd. DWRF can discharge effluent to the Cache la Poudre River, Fossil Creek irrigation ditch, or to an on-site pump station owned by the Platte River Power Authority for use as cooling water at the power plant 20 miles north of Fort Collins. DWRF treatment processes include primary sedimentation, biotowers, activated sludge, secondary clarification, chlorination, dechlorination, and biosolids thickening, dewatering, and composting. The sanitary waste transfer I -10 station originally located at MWRF was re-located to DWRF in 1995 as part of the upgrades at MWRF. Average combined summer flows to the two plants are currently approximately 19 mgd. There are no problems with meeting secondary treatment levels. Biosolids use options currently include 377 acres of City-owned irrigated farm land (the Resource Recovery Farm), and 26,000 acres of City-owned ranch land called Meadow Springs Ranch. The City currently produces approximately 1,900 dry tons of biosolids per year, and the majority of this is applied at the ranch. In 2000, about half of the Resource Recovery Farm was sold to the City of Fort Collins Natural Resources Department for open space. The city is currently developing an overall development plan for the remaining portions of the farm, with a farm closure plan intended to be implemented beginning in 2001. The ranch recently completed demonstration phase studies to determine the optimal equipment, timing, and methods, for beneficial application of biosolids to rangeland. Eventually, all biosolids will be applied at the ranch. In 1990 the City, in conjunction with James M. Montgomery Engineers, completed a "Master Plan for Wastewater Treatment Expansion". The plan outlines a 20-year program for the expansion of wastewater treatment capacity and improvement of treatment processes. Future capacity expansion may occur at a new site, located near the junction of the Cache la Poudre River and Colorado Highway 392; this site was purchased in 1990. Fort Collins recently cooperated with other nearby wastewater treatment entities to study treatment options to accommodate future growth. A regional plant at this site or some other site was one of 1 -11 the options studied by the entities. The final recommendation of the study was that Fort Collins expand the DWRF when additional capacity is needed in about 20 years. - es- Fox Acres Fox Acres is a recreationally-oriented development, primarily for second homes, located in Sections 22, 27, and 28, T10N, R73E, just north of the Red Feather Lakes area. It contains lots for home building, condominiums, and a golf course and clubhouse-restaurant. A PVC pressure sewer serves the subdivision, and wastewater collected is treated through the Community Services Corporation's facilities. Those facilities include an aerated lagoon, polishing pond, and chlorination. The aeration lagoon is partitioned into four cells, with six aerators in the first cell two in the second cell. These are submerged turbine-type aerators. The fourth cell is used for settling. Dis- charge is to an ephemeral tributary to Columbine Creek and then to North Lone Pine Creek in the SE % of Section 22. These waters are part of Segment 8 of the Cache la Poudre River. There are potentially 259 domestic connections to the sewer system at buildout plus the clubhouse. Build-out is not expected for more than 20 years. The company is currently in the process of applying for a re-rating of the plant capacity from 0.035mgd to 0.04 mgd. Greeley The City of Greeley expanded its Water Pollution Control Facility (WPCF) to a capacity of 14.7 mgd in 1996. The average effluent flow in 2000 was 1 -12 7.90 mgd. Plant processes include primary settling, activated sludge, Ara secondary clarification, chlorination, dechlorination, anaerobic sludge digestion and land application of biosolids. The plant now has the capability of nitrification and denitrification, as well. Greeley's discharge permit was renewed and became effective on Aug 01, 2000. The present ammonia limits vary by month and by effluent flow. The 30-day average permit limit for ammonia-nitrogen ranges as low as 5.0 mg/L. The WPCF has been able to meet the new limit. r -- Greeley has just completed a new Sanitary Sewer Master Plan. The purpose of this study was to provide an update to the city of Greeley's 1995 Sanitary Sewer Master Plan. This new Sanitary Sewer Master Plan includes modeling of the existing sanitary sewer system with a new hydraulic model. The model will then be used to identify deficiencies in the existing system and to provide planning for future growth of the system. The future system evaluation will also include evaluating the feasibility of regional wastewater treatment facilities and conceptual designs for the sanitary sewers for the ^ City's long range growth area. The long range planning horizon for this study is the 2050. The review of water rights return flow requirements under current water agreements/laws will also be accomplished. A Capital Improvements Program (CIP) list of projects will be developed based upon the work of this study. The City continues to invest approximately $750,000 annually in sewer system replacement and rehabilitation. r The key goals to be accomplished in this study were: 1) identify limitations of the existing sanitary sewer system through new hydraulic model, 2) identify collection system and treatment improvements needed to serve the 1 -13 0.1 long range growth area, and 3) complete a five and ten year CIP project list including description and cost. ^ Greeley is the designated management agency for the City and some adjacent areas. The City did accept the responsibility of designation, but there has been no formal agreement adopted between Greeley and Weld County pertaining to the respective responsibilities of each in the unincorporated areas that are within management agency boundaries of the City. The City does provide services to a very few accounts outside city limits. As the City grows, service agreements may be negotiate with adjacent municipalities and districts. ^ Severance In 1979 Severance constructed a sewage collection and treatment system. The treatment facility consists of an aerated stabilization pond and a polishing pond with chlorination prior to discharge. In 1999 the Town modified the plant to a three cell system with aeration in the first two cells followed by a settling cell, relined the existing ponds, and built a new - . chlorine contact basin and installed flow meters. It has a rated capacity of 0.094 mgd. Flow is currently about 0.044 mgd and is expected to reach 0.089 within the next four years. The discharge is to Law Ditch, which is unclassified. The Town's permit expired in 1999 and awaits re-issuance. Severance is contemplating the construction of a sanitary sewer interceptor -, to connect into the Town of Windsor's new East Side Interceptor sewer. The length of this sewer will be approximately 15,000 feet. The wastewater generated from Severance would then be treated by the Town of Windsor. I -14 If Severance connects to the Windsor wastewater system, the existing Severance wastewater treatment plant would be abandoned. South Fort Collins Sanitation District The South Fort Collins Sanitation District provides wastewater services to an area of about 30 square miles between the cities of Fort Collins and Loveland. In addition to providing services to the unincorporated areas of Larimer County; portions of each city's urban growth area is served. The District also contracts service with the Spring Canyon Water and Sanitation District for treatment of their wastewater. Design capacity of the existing facility is 3.0 mgd. Average daily flows in 2001 were 1.92 mgd. Activated sludge aeration and clarification provide secondary treatment, tertiary treatment is through multi-media filters, and disinfection is by Ultraviolet light before discharge to Fossil Creek Reservoir. Waste activated sludge is treated by aerobic digestion. Biosolids are disposed of by commercial hauler to a beneficial use site operated by the District. A Wastewater Master Plan was completed by the District in 2000. Recommendations in that study include expanding the system by the year 2006 to accommodate anticipated growth and maintain effluent water quality. The planned expansion will involve extended aeration activated sludge with final clarifiers, aerobic digestion, sludge dewatering and UV disinfection. This project will expand the facility's capacity from the current 3.0 mgd to 6.0 mgd as the first part of a 3-phase expansion which will culminate with a total capacity of 9.0 mgd. The last phase will replace the current 3.0 mgd system. The process planned will be capable of providing ammonia removal and phosphorus removal if required at that point in time. I -15 Wellington Town of Wellington facilities currently consist of two lagoons followed by chlorine disinfection. The first lagoon is fully aerated with the second pond divided between an aerated portion and a settling area, constituting a three stage system. The system is currently rated at 290,000 gpd for a 590 lb/day BOD load. r- In 2000 a Wastewater Master Plan was completed which recommended building a new mechanical facility to provide capacity for growth demand as well as to meet new effluent requirements which include ammonia removal. The new facility would fall under the classification of an extended aeration system with an activated sludge process to include a headworks pumping station, final clarifiers, sludge dewatering, aerobic digester and effluent disinfection using UV light. Solids treatment will be accomplished through the AADC process (Agitate Air Drying and Curing) which is expected to produce a Class A Biosolid for disposal on Town property, surrounding sod farms, and possibly the CSU ARDEC site. The new system will be sized for a design flow of 1.2 mgd with the first phase of construction completing a 0.6 mgd system that can be readily ^ expanded to 1.2 mgd by adding a second aeration basin. The Town intends to start construction of the first phase by spring of 2002 with completion by mid 2003. Recent information regarding I/I indicates that the Town, through ifs on going efforts, has reduced average I/I by about 30%, bringing per capita flows down to 93 gpcd in 2000. -16 As per terms of an IGA with Boxelder Sanitation District, the Town's service area will overlap that of the District in Sections 7, 8, 14, 15, 16, and 17, T8N, R68W, and in section 12, T8N, R69W. r Windsor The Town of Windsor presently treats municipal sewage from the Town, domestic sewage from the Kodak plant, and 0.1 mgd of pretreated industrial wastewater from the Metal Container Corporation in an activated sludge plant. Kodak's discharge amounts to about 30 percent of the flow. The process sequence at the Windsor plant consists of preliminary treatment followed by two parallel activated sludge process units, nitrification, possible denitrification, U.V. disinfection, discharge to the Cache La Poudre River, and biosolids handling. The treatment plant has a rated capacity of 2.8 mgd flow and 7,006#/day BOD5 organic load. Current loads are 1.04 mgd flow and 1,928 lbs/day BOD. • I -17 BIG THOMPSON RIVER BASIN r The headwaters of the Big Thompson River are in Rocky Mountain National Park between the Town of Estes Park and the Continental Divide. After leaving the Big Thompson Canyon, the river flows by Loveland, Johnstown, and Milliken before emptying into the South Platte River near La Salle. The Little Thompson River, a major tributary, converges with the Big Thompson at Milliken. Municipal discharges in the basin include the Estes Park, Upper Thompson, and Milliken Sanitation Districts and the City of Loveland to the Big Thompson River and Berthoud and Johnstown to the Little Thompson River. Figure 1-2 depicts the Big Thompson and Little Thompson River Basins and locates the major dischargers. a- Berthoud Berthoud presently provides sewerage service to the Town as well as some adjoining areas, including an area east of town to 1-25 and the area north of the Town that was formerly the South Loveland Sanitation District. That district was disbanded, and Berthoud assumed the responsibility of the service in 1986. The present population served by the Town is approximately 6,309 persons. Berthoud's treatment plant is an oxidation ditch type secondary plant with ^ aeration, secondary clarification, chlorination, and aerobic sludge digestion with discharge of effluent to an unnamed tributary of Segment 9 of the Little Thompson River. Digested sludge is applied to land by a contract hauler. In 2000, a new sludge handling facility was constructed on the site proposed for a new VVVVTP. Current average daily flows are about 0.6&-mgd, and the plant capacity is 0.9 mgd. Infiltration from high ground water during the 1 -18 ) w ? FIGURE I-2. >ill ' ` 4i BIG & LITTLE THOMPSON BASIN ) r '� * 1 MUNICIPAL DICHARGES �, 12-3-01 ly SERVICE AREA lb . O& if + � TREATMENT PLANT a 43 1 0 5 MFR MILES ) 'I. . • 1` ♦ N\ y Z-I€ . b1/4 _3 ) • ` G i , . I) I . Br NP-tVrH°Mps I. J % % . . •t Loveland / / �� _ le ) Estes Park ir II1 �. ,i �_ 1 I, + II IIII r 1 / �' //�� i%�%' /��---�. _i ce i ; ' ' : , � - + U534' i Milliken air. • , - — - — + Upper q A ' �,._ r ��. Thompson LIT Johnstown TCf T110Mp s \`�� \ \. _ . . .. — ON FP As i rz 1 . A • .. . V V I-19 irrigation season has been a problem in the past. Slip-lining the worst sections has been successful in reducing excessive infiltration. Additional line replacement and manhole reconstruction occurs on an ongoing basis. Organic treatment capacity is 1300#/day BOD5 and current loading is about ,_ 1,600 lbs. per day. Wastewater master planning was updated for Berthoud in 1996. In 1997, the Town requested a plan amendment to add new areas to their service area and to have a site designated as a new regional plant site. Approval was granted for a plan amendment to include 640 acres in the S'% Section 18 and the N%2 Section 19, T4N, R68W in the service area, and for the new plant site in S'/ Section of 19. The current needs of Berthoud have exceeded the capacity of the existing WWTP, and therefore a new facility is being designed. A new biosolids digester was completed at the new plant site in 2000, and the plant will be relocated to the new site in about 2003. It is projected that the new plant will be able to treat 2 mgd in 2003, and it will be designed to be expanded to 3 mgd by 2010. The new VWVTP will incorporate screening and grit removal, a lift station, activated sludge aeration basins, clarifiers, and UV disinfection with the aerated digester. Berthoud again requested an expansion of their service area in 1998 to include lands in the I-25/Highway 56 interchange vicinity. Those lands added include all or part of Sections 15, 22, 23, 25, 26, and 27 of T4N, R68W. The Town would then construct a lift station in the NW'A Section 23 and pump the wastewater through a force main constructed along Little Thompson River Basin corridor westward back to their new regional treatment plant site. r I -20 r Berthoud Estates r The treatment plant at Berthoud Estates originally consisted of two aerated lagoons, a polishing pond, and chlorination. In 1993, it was modified to make the center lagoon an intermittent sand filter. In the summer, wastewater is treated through the first aerated lagoon and then discharged through the sand filter in the second lagoon; while in the winter, wastewater is treated through the first and third aerated lagoons before discharge. Discharge is to the Little Thompson River via Dry Creek and an unnamed intermittent tributary of Dry Creek. The plant now serves 183 homes with a rated capacity of 0.052 mgd. There is the potential for another 8 homes to be connected. The discharge began in June, 1982 and has had some problems in meeting effluent limits for TSS. The plant has been granted a waver of the 30/45 mg/I TSS limits to 75/110 mg/I because it is a small lagoon system discharging to an intermittent stream. The current CPDES permit for this discharge expires on July 31, 2004. Estes Park Sanitation District The Estes Park Sanitation District was formed in 1940 and serves approximately 3,200 full time residents. During the summer peak of tourism, the overnight population increases by approximately 3,400 residents. The District has 1044 single-family dwellings/full size condominiums, 516 smaller multi-family units and 300 commercial taps. Peak flows associated with tourism occur in late July or early August. However, infiltration can cause the annual peak flow to occur during the spring runoff of May or early June. Peak flow in 2000 was .810 MGD or 54 percent of capacity. The lack of rain in the Estes Valley kept this I -21 number lower than usual. The District anticipates peak flow to be approximately 65 percent of capacity. An ongoing Ill program analyzes troublesome or aging collection lines, and approximately2,000 to 2,500 feet of these lines are replaced annually. The I/I program has steadily lowered peak flows associated with infiltration during the past ten years. New service extensions are performed on an as needed basis. The treatment facility was built in 1964 and includes plant processes of flow equalization, activated sludge secondary treatment, clarification, chlorination/ de-chlorination and aerobic sludge digestion. Biosolids removal is achieved through local land application and with contracts for land application in Larimer and Weld Counties. Discharge is to Segment 2 of the Big Thompson River, just above Lake Estes. The District has investigated possible treatment and operations improvements that target efficiency and flexibility, and they have begun implementing several of these improvements to meet more stringent effluent ammonia and pH limits. The District has also completed plans for the construction of buildings to house biosolids thickening equipment, allow for continuous chemical feed, and also cover the headworks of the facility. These improvements will address odor concerns in addition to efficiency and flexibility of operations. The target date for their completion is 2002. Chief among the District's concerns is the potential for more stringent metals restrictions in future discharge permits. These restrictions may require additional treatment improvements. A DAF pilot study was performed in 2000 in an effort to gather general information as well as effectiveness regarding metals removal. I -22 Johnson's Corner The development at Johnson's Corner, which includes a truck stop, motel, trailer park and several small businesses, is provided sewage service through a small private treatment plant. The plant discharges minimally to an unnamed gully tributary to Hillsboro Ditch. It consists of two aerated lagoons, a polishing pond, and chlorination, with a rated capacity of 0.04 mgd hydraulic and 99#/day BOD5 organic loading. The most recent improve- ments included the installation of larger aerators in the aeration lagoons, an electronic flow meter, and a new effluent polishing area in cell #2. Johnstown r-- In 1982 the Town of Johnstown completed a wastewater treatment plant construction project which provided the Town core with more than sufficient capacity for the planning period. Average daily flows are now 0.35 mgd, and the plant design capacity is 0.42 mgd. The plant consists of an aerated lagoon followed by a polishing pond and chlorination before discharge to Segment 9 of the Little Thompson River. Projections for town growth estimated that flows could double within the next ^ five years. Johnstown plans to expand the plant in 2001 to a design capacity of 1.5 mgd, consisting of a three-cell aerated pond system followed by dissolved air flotation and chlorination/dechlorination. Johnstown's comprehensive plan includes the need for two additional treatment plants; the Low Point and Cross Point Plants are planned for service areas northwest and southwest of the Town core, respectively. The I -23 Low Point Plant would discharge to the Big Thompson River and the Cross Point Plant would discharge effluent to the Little Thomson River. The Low Point Site Application was approved on May 4, 2001; The Cross Point Plant future development are uncertain at this time. Each of the two additional plants are sited to optimize effluent reuse as high in the watershed as possible and to do so in conjunction with Town raw/finished water resource features. Loveland The City of Loveland is the designated management agency for the area within its urban growth area (UGA) boundaries. An intergovernmental agreement (IGA) between Loveland and Larimer County was adopted on May 1, 1980 and most recently amended on February 7, 1984. This IGA sets forth responsibilities of both City and County concerning development in the urban growth area. Loveland accepted the designation as management agency in 1978 when this plan was originally adopted. Loveland's wastewater treatment facility has a rated hydraulic capacity of 8.0 mgd. Its treatment process consists of (1) a headworks facility including a bar screen to remove coarse solids, an odor control unit, and an aerated grit chamber, (2) primary clarifiers, (3) trickling filters, (4) aeration basins, (5) final clarifiers, (6) chlorination/dechlorination, and (7) anaerobic digesters. Sludge is stabilized by anaerobic digestion and utilized for land application through a contract with Liquid Waste Management. Current flows average 5.80 mgd (1997), with July 1998 flows of 7.65 mgd and January 1998 flows of 5.25 mgd. The current service population is approximately 47,000 and is expected to increase approximately 2% per I -24 ^ ,I1 year over the next few years. Approximately 2% of the flow volume comes from industrial dischargers. The City completed a major wastewater treatment plant modification during 1986-87. The plant operation has been improving steadily. A biomonitoring program has been underway since 1986. The City implemented a complete industrial pretreatment program during 1988. In 1998 CH2M Hill completed an Incremental Expansion Study of the wastewater treatment plant. This study identified 12 capital projects needed for the plant to achieve a rated capacity of 12.0 mgd. The first project is underway and will be completed in 2003, which will increase the rated plant hydraulic capacity to 10 mgd and rated organic capacity to 16,000 lbs/day BOD5. Loveland was issued its current NPDES permit in January 1996 with an expiration date of December 31, 2000. The NPDES permit has been extended until a new permit can be issued. Milliken The Town of Milliken operates a .35 mgd aerated lagoon wastewater treatment plant. The wastewater treatment plant was put online on September 1990. The system includes 2 aerated lagoons, a finishing pond, chlorination, and de-chlorination facilities. The plant discharges to Segment 5 of the Big Thompson River in SW %. of SE /of Section 1,T4N, R67W. The capacity limits in the plant's permit(which is under review) are 570 pounds of BOD5 per day and a flow of 0.35 mgd. With rapid growth on the horizon, the wastewater treatment plant should be expanded. The Colorado Dept. of Health and Environment notified the Town that its new .� permit would include ammonia standards on effluent. Previously, the Town I -25 r had submitted a proposed upgrade to the CDPHE for expansion of the existing lagoon system to accommodate near future growth projections prior to design and construction of a mechanical treatment system. Because the new ammonia limits will not allow the Town to effectively treat its wastewater with a lagoon system, it has discontinued design of the interim improvements and begun design for the construction of a mechanical plant. Because the design and construction process for this mechanical plant will take approximately 3 years to complete, the Town and CDPHE intend to include an implementation plan and schedule in the Town's new permit, which is scheduled to be issued in December 2001. Riverglenn The Riverglenn Subdivision south of Berthoud has a domestic sewage treatment system comprised of two aerated lagoons, an aerated polishing pond, and chlorination. The discharge from this 0.029 mgd rated capacity plant is to the Little Thompson River, and its current permit expires on January 31, 2003. The subdivision is nearly built out (one lot remaining of 61), and flows are approximately equal to 34-40% of the plant capacity. A new subdivision to the north of Riverglenn, consisting of 45 lots, will connect to the system when built and bring the flow to 72% capacity. Upper Thompson Sanitation District The Upper Thompson Sanitation District serves approximately 3,000 residences and 135 commercial establishments in an area of about 9 square miles around the Town of Estes Park. The District's flows average 0.6 mgd in the winter and 1.2 mgd in the summer. Discharge is to Segment 2 of the 1 -26 Big Thompson River. Two commercial connections account for 24 percent of the summer daily flows: Rocky Mountain National Park has 9% and the YMCA Camp has 15%. The treatment plant had an original design capacity of 1.5 mgd, and its facilities include activated sludge, secondary clarification, nitrification towers, tri-media filtration, and chlorination and dechlorination. Sludge is treated by aerobic digestion and disposed of on land by a contract hauler. The District has explored the option of transferring some of its raw sewage flow to the Estes Park Sanitation District and in exchange treating EPSD's biosolids for them. No further planning on such a possible exchange is now occurring, but it is still an available project at the appropriate time. The Upper Thompson Sanitation District plans to increase the capacity of their plant to 3.0 mgd in phases. Phase 1 has now been completed with the construction of a new clarifier, which now brings the Districts capacity to 2.0 mgd. Additional aeration basins will be constructed in subsequent phases as growth dictates. Western Mini Ranches/Vaquero Estates . ^ These two subdivisions numbering 84 homes southwest of Berthoud have a treatment plant consisting of two aerated lagoons, a polishing pond, and ^ a chlorine contact basin. The plant capacity is 0.025 mgd; and it discharges to Dry Creek, a tributary to the Little Thompson River. Current flows are about 0.018 mgd, and the subdivisions are built out. I -27 SAINT VRAIN CREEK BASIN The portion of the St. Vrain Creek Basin which lies within Weld County is in the NFRWQPA planning area. Because this is a relatively small portion of the basin at the lower end, there is little development in the area and few wastewater treatment entities. The entities in this basin have service area boundaries that are in close proximity to each other. Consolidation or regionalization of services should be considered when expanded services or treatment is planned. Figure 1-3 indicates the discharges in this basin. Dacono Sanitation District The Dacono Sanitation District (DSD) provides only wastewater collection service to the City of Dacono. The District contracts with the Weld County Tri-Area Sanitation District (WCTASD) for treatment and disposal of the wastewater. Dacono's existing population is approximately 3,300, and ^ sewage flows are about 0.3 mgd. The City, however, has annexed a large amount of developable land, and the Districts potential collection system area has increased significantly. Most of the additional development will be served by the existing WCTASD lagoon VWVTP or a new expanded WWTP. Residential growth in the southern portion of the service area is expected. There may be some development that borders the St. Vrain Sanitation District's (SVSD) service are that could be served by that District. An IGA between DSD and SVSD would speak to the details of such a service arrangement. I -28 N o ch i 6 se I • Mead if' f�.C,. .LI',1 �• COLO-66 ! • , 'b` COLO-66 al • ll • RATNCAB FFK Longmont _ I' �� ';, rl, , _ ' III ! ' • 5t Vrain .1:_.><, . . .I, ► iI i I 1.: ' li ) r _ Weld Co::"� D • �° :; Tri Area " 1 �0> COLO-52 • /ii!i/ GO - III v COLO-52\ ‘ 1 1 Erie � J FIGURE I-3. 1 ► I a ST. VRAIN CREEK BASIN MUNICIPAL DISCHARGES a ' ' ' • IT 0 .0 • r_ „)._ % TREATMENTPLANT • • � Weld County 1 0 5 Adorns County MILES I-29 Erie The Town of Erie provides wastewater collection and treatment services within the Town's wastewater utility service area. The Town provided wastewater service to an estimated 7,218 people at the end of 2000. The maximum month "average daily flow/" during 2000 was approximately 0.58 mgd. This flow is expected to increase to approximately 1.54 mgd by the r end of 2005. The Town of Erie wastewater utility plan and site applications for initial rerating and subsequent expansion of the treatment plant to 1.8 million gallons per day was accepted as a final wastewater utility plan by the DRCOG and the NFRWQPA as co-water quality planning agencies, after review by the DRCOG Water Resources Management Advisory committee and the NFRWQPA Board of Directors, respectfully. The wastewater utility plan includes wastewater utility plan (June 2001), and updated supplement (August 22, 2001). Wastewater treatment is accomplished using the activated sludge process followed by ultraviolet disinfection. The hydraulic capacity of the existing Erie Water Reclamation Facility(WRF) is 0.8 mgd*. (*A Site Application has been submitted requesting that the capacity of the existing Erie WRF be re- rated from 0.6 mgd to 0.8 mgd.) The corresponding organic capacity of the facility is 1,764 lbs BOD5/day. Engineering design for expansion of the Erie WRF hydraulic capacity from 0.8 mgd to 1.8 mgd capacity, with a corresponding organic capacity increase from 1,764 lbs BODS/day to 3,963 lbs BODS/day, is currently underway. Construction of the facility expansion is scheduled to begin in the fall of 2001 I -30 and be completed in the summer of 2002. It is anticipated that additional wastewater treatment capacity above the 2.8 mgd provided by the expansion of the existing WRF currently under design will be needed by 2006. A second Water Reclamation Facility to meet this additional capacity need is planned at a site near the north boundary of the Erie wastewater utility service area. The new"northern facility"will be design to treat an additional 1.4 mgd of wastewater and all of the solids (waste activated sludge) generated at both the northern facility and the existing facility. Preliminary planning for the new northern facility has already begun. Construction is expected to begin in 2004 with completion in 2006. Following completion of the northern facility, the existing water reclamation facility will be modified to produce re-use water for irrigation of parks and other open space areas in and around Erie. Longmont In 1989, the City of Longmont annexed a 140-acre parcel in Weld County, and in 1990 the City built an interceptor to connect that parcel to their wastewater treatment plant about two miles to the west. This interceptor is part of a basin service area, Basin G, that includes the area east of the City to a ridge slightly east of the Boulder-Weld County line. The first phase of construction in 1990 served the annexed parcel in the SW % of Section 6, T2N, R68W (McLane Site) and any development which occurs in the future between it and the present city plant. The City extended Interceptor G to the north and west in 1997-98 to serve development in the northeast part of the City. The City extended Interceptor G to the north and west in 1997-98 to serve development in the northeast part of the City. The City has a project underway to expand the plant capacity to 17 mgd by 2002. At that time, the I -31 City will reevaluate alternates of expanding the plant at the current location or relocating it. The DRCOG Metro Vision 2020 Clean Water Plant provides additional wastewater management planning information for this overlapping service area. The two areawide plans will be kept consistent for planning purposes, and any planning information differences will be addressed through the memorandum of understanding between the areawides on a case by case basis. r Mead The Town of Mead assumed ownership and control of the wastewater treatment facilities serving the Town upon the dissolution of the Mead Sanitation District on January 1, 1993. Treatment is provided by a three cell lagoon system with two aeration cells and one settling pond. In 1992 and 1993, the District partially upgraded their system by placing an earthen berm across the second of their two cell system placed aeration into the second cell, changed the method of chlorination, and installed flow recording devices on both the influent and effluent sides of the plant. Following a study of the system by the Town's consulting engineer it was determined that sludge needed to be removed from the first cell (original aeration cell) and that detention time allowed algae to grow and be discharged in the effluent, thereby exceeding the TSS for the plant. In 1995, the Town began bypassing Cell 1 of the plant and drying it for sludge removal. Curtains were placed across Cell 2 to create three cells, and the polishing cell was also bypassed. This effectively cut the detention time and allowed the plant to operate more efficiently. In July 1996 Cell 1 was cleaned out and 1.1 million I -32 r gallons of biosolids were removed. A new influent headworks structure was constructed in 1998. Four new 4,500 gallon chlorine contact vaults were added in 2000. These tanks are sized for a 30-minute detention at the peak flow rate of 180,000 gallons per day. A new permit, No. COG-582036, was issued on August 17, 1999, effective September 1, 1999. The permit, good for a hydraulic loading of 140,000 gpd, is valid through July 31, 2004. In 2001 the Town acquired the Lake Thomas Wastewater Treatment Plant. The facility is good for a hydraulic loading of 12,000 gpd, and its permit (COG-582017) is valid through July 31, 2004. The aerated lagoon facility constructed in 1989 was used to serve the Country View Day Care Center. Currently the facility is not receiving or discharging flows and a plan to rehabilitate the facility is underway. A new inlet and outlet structure, a new hypo-chloride contact chamber, and rehabilitation of the lagoon banks is scheduled to be finished prior to the re- activation of the plant in December of 2001. ^ In 1992, the Town authorized a "wastewater system feasibility study"with the intent of establishing a regional plan for the Town's urban growth area. The .study was prepared by RBD, Inc. Engineering Consultants. The study evaluated the long term needs of the Town for wastewater collection and treatment. The study as adopted by the Town provides that the existing wastewater treatment plant will be used until growth immediately surrounding the original town site dictates a move of the plant to the Lake Thomas site. At that time a new aerated lagoon treatment facility with a design life of 30 years will be constructed. In August 2001, Jacobson Helgoth Consultants submitted the 'Wastewater Feasibility Study Update"final draft report to the Town. The purpose of the I -33 study update was to revise the 1992 feasibility study. Information compiled in the study includes service area delineation, population growth projections, effluent limitations, trunk sewer routing, and treatment alternatives. Currently the treatment plant treats 75,000 gallons per day and is serving an estimated population of 1,000 people. The existing treatment plant Basins 1 and 2 can treat 180,000 gallons per day; however, improvements totaling approximately $300,000 will be required. These improvements include adding aerators, a baffle wall, and increasing the size of the interconnecting piping between Basins 1 and 2. It is felt that with these improvements the treatment plant will accommodate an additional 1,400 people or approximately 500 new homes. If Basin 1 were upgraded, the treatment plant capacity could be increased to 320,000 gpd. Improvements to obtain the additional 140,000-gpd capacity have been estimated to coast$600,000. Four alternatives were evaluated in the 2001 study for replacing the existing treatment plant. The four alternatives considered three alternative sites located in the Town's service area, and the fourth alternative includes pumping the flow to the St. Vrain Sanitation District. • The plant location and the cost of the treatment plant and out-fall sewers for each alternative are indicated below. Location Estimated Cost �- 1-25 at North Creek $5,746,000 North Creek above Lake Thomas $6,334,000 North Creek below Lake Thomas $6,344,000 St. Vrain San. Dist. $7,343,000 I -34 The consultant did not recommend an alternative. Some of the Town Trustees prefer the site located below Lake Thomas due to being able to serve the entire planning area without the need of adding pumping stations. In addition, it is believed that the Lake Thomas WWTP can be abandoned due to the outfall sewer located near the existent WWTP. The report recommended that a public hearing be conducted to obtain public input for the study results. User rates have not been developed; however, these will need to be developed prior to a public hearing. The Town will be reviewing the financial aspects for constructing a new one million gallon per day treatment plant. In addition, the Town will need to determine when they want to discontinue making improvements to the existing treatment plant and move toward one of the new treatment plant alternatives. ,r- Saint Vrain Sanitation District The St. Vrain Sanitation District was created in 1986 to serve the area near the intersection of 1-25 and State Highway 119, commonly referred to as Del Camino, and the surrounding areas. As of 2000 there are about 9,100 acres within the district boundaries. The District's potential service area, as indicat- ed in the 2000 208 Plan Update, includes about 43,000 acres. The District could readily serve additional areas upgradient of the service area with gravity sewers if development occurs. The District's treatment plant is four miles downgradient from the Weld County Tri-Area Sanitation District treatment works. The potential exists for future consolidation, which would include treatment for a portion of the Dacono Sanitation District(a collection ^ system district). The City of Longmont projects that it may need to construct additional treatment capacity after 2020 either at a new their existing plant 1 -35 or downgradient within the St. Vrain Sanitation District Service Area. The District presently serves a small portion of Longmont located in Weld County. The District's secondary sewage treatment plant was constructed in 1987, along with a core collection system. This resulted in the elimination of 3 small treatment facilities in the Del Camino area. Five major line extensions along with numerous sub-division collection systems have been subsequently completed. Connections to the system through the year 2000 include 1,110 residential taps, a 210-unit mobile home park, 85 commercial taps, and fifteen industrial taps, totaling 2,118 Single Family Equivalents. A 401-unit factory manufactured housing development, ten residential, and nine commerciaUindustrial subdivisions are under construction. Two major line extension to serve areas south of highway 52 and west of I-15 are being constructed in 2001. District's wastewater treatment plant is being converted from a 0.5 mgd aerated lagoon system to a mechanical plant with two 1.5 mgd extended aeration lagoon and clarifier modules, to provide a 3.0 mgd plant capacity. It will be activated in early 2002. The District's discharge permit was renewed on February 1, 1998 and expires January 31, 2003. It will be amended and perhaps extended, upon completion of construction of the mechanical wastewater treatment plant. r CDH&E site approval included a third 1.5 mgd module, (not being constructed at this time). Should treatment requirements exceed 4.5 mgd, each treatment module is designed for conversion to an activated sludge process with 5.4 mgd capacity, or a potential of 16.2 mgd capacity with conversion of all three modules. Area for future development at the plant site remains. Additionally, the plant is surrounded by large lakes (formerly gravel mines) and a no development easement. flak I -36 Weld County Tri-Area Sanitation District The Weld County Tri Area Sanitation District serves the Towns of Firestone and Frederick, the unincorporated area of Evanston, and the Town of Dacono through a contract with the Dacono Sanitation District. The combined service population of the four communities is approximately 7,336, and the District currently has a total of 2,552 taps. The Districts discharge permit rates the plant capacity at 1.5 mgd, and 1,659 pounds of BOD5 per day. Average flows are 0.80 mgd. Treatment is by two aerated ponds, with discharge to an unnamed ditch tributary to St. Vrain Creek. The District made improvements to its plant with additional aeration and chlorination facilities in 1986 and constructed 9,800 linear feet of 18" and 15" interceptor line in 1990. The current permit for the District expires on January 1, 2006. r- r r^� r. -37 ^ r SOUTH PLATTE RIVER BASIN The South Platte River is the major drainage through Weld County, entering from the south and flowing into Morgan County on the east. In addition to the Cache la Poudre River, Big Thompson River, and St. Vrain Creek, its other significant tributaries are Big Dry Creek, Crow Creek, and Lone Tree Creek. Municipal dischargers in this lowest basin of the region include Ft. Lupton, Gilcrest, Hudson, Lochbuie, Platteville, La Salle, Evans, Pierce, Kersey, Keenesburg and Grover. Figure I-4 locates the discharges of significance in the South Platte Basin in Weld County. Evans Since 1985 the City of Evans has operated its wastewater treatment plant (prior to this it was operated by the Evans Sanitation District). The service area population is estimated at 9,255, and present dry weather flows are about 0.92 mgd. Treatment consists of aerated lagoons followed by a polishing pond, chlorination, and dechlorination before discharge to the South Platte. The rated treatment capacity of 1.2 mgd should not be reached until after 2010. A new permit was issued to the City in 1994. The plant capacity was re-rated from 0.9 to 1.2 mgd in 1997. Infiltration of ground water into the collection system is a problem and should be reduced. The City Plans to slip line the worst portions of the system. Grit removal facilities will be replace in 2002, and sludge will be removed in 2004. I -38 Iii,^'� S` , , Nif '''illh ill 7 • Pierce COLO-14! . • i: • +� N. Vii. • .Ai ).. .'e I • COLO-04 • 4 • N. 1 4 • • 1 • �. li 't ��I IV • 1 ..�� • Galeton • OM• I • • V <OLO-392 I igh 4 COLD-392 In ' , 1 • • I ' CACHE LA POUDRE RIVER 1 ,r kl le U5 34 . 1 •• ' r 1� -'1.:t .' BIG I • • �tiOy • Hill- -Park 040_ L- • SON I � Kersey � `- \� _ `` t -c LaSalle 4 • P • , J,,, ., •V • INER NOMP {ONR LIt-c\ • • • E I • • Gilcrest / . • R .• • ••• itS .p '-. . Platteville • �` • � • • � t. ` �� 5) I ,_44,/ O} m IP •: I .� Sj N9-Pi-\ CREtiK • ,• I. • • e I • • • I . • r `< • . - H • : • a 'O .p r Fort Lupton Keenesburg 9 ' 11" rips • Hudson . \ OL°52 r • ' 1t FIGURE I-4. • IDacono- •, SOUTH PLATTE RIVER BASIN MUNICIPAL DISCHARGES �// •• Loci hbuie�' r 12-3-01 ' • SSERVICE AREA y� North�le_hn� _ „ _ „ „ _ „ � Weld can � TREATMENT PLANT Broomfield Adams C0 1 0 5 MILES •• Fort Lupton The City of Fort Lupton has one of the larger discharges directly to the main stem of the South Platte River. The discharge averages 1.24 mgd and includes a large infiltration contribution. The City's treatment facility is adjacent to the river along the upstream portion of Segment 1 of the Middle South Platte River. Population is estimated at 6375, and about 12 percent of the flow originates from commercial and industrial sources. The City has replaced its old plant with a new oxidation ditch secondary treatment plant. The new plant was brought on line in October 1993 and began discharging in November 1993. The annual average design hydraulic capacity of the plant is 2.75 mgd for domestic sewage plus cooling water from a major industrial contributor which began operations in mid -1994. The plants organic loading capacity is 4,355 lb/day BOD5. The oxidation ditch is followed by clarification, UV disinfection, and aerobic sludge digestion. Biosolids will be de-watered and land applied to city parks or local farms at a rate of about 386 tons per year. Galeton Water and Sanitation District The Galeton Water and Sanitation District was created in 1990 to provide sewer service to the Town of Galeton, which was served by septic-leach field systems. The population served initially was 120 with a facility capacity of 185-person equivalents. The treatment system consists of three lagoons with a capacity of 0.0185 mgd. Discharge after chlorination is to Willow Creek, tributary to the South Platte River. The sewer system and treatment plant construction were completed in 1992. The current population served I -40 is approximately 145 plus 120 school children during the school year. Possible needs include aerator replacement and biosolids removal. r r Gilcrest The Town of Gilcrest provides sewerage service to approximately 1,160 residents. Treatment facilities include two aerated stabilization lagoons, a polishing pond, and chlorination; the discharge is pumped through an 18,000 foot 6 inch outfall that is partially by force main and the remainder flows by gravity to the South Platte River in the SE % of the SE % of Section 24, T4N, R67W. This outfall and other plant improvements were constructed in 1987 at a cost of $169,000. Rated capacity of the treatment plant is now 0.196 mgd, with an organic loading of 466 lb/day BOD5, and it should be adequate for more than twenty years. Current flows are approximately 0.8 mgd. The Town expects to line the Pond within the next five years. GilcresVs discharge permit expires on January 31, 2004. There are no changes in hydraulic and organic landings from the previous permit. Grover Grover does not discharge from its facilities to any surface water. Present flows are approximately 0.011 mgd and rated capacity is 0.03 mgd, well beyond that needed to adequately serve the Town for the planning period. Treatment of sewage is provided by aeration basins with discharge to land via leaching beds. I -41 Hill-N-Park Sanitation District Hill-N-Park Sanitation District serves a residential development area in the western growth area of Evans. There are 1,600 domestic taps on the sys- tem, serving about 5,200 people. Projected growth by 2005 is about 6,260 people. The District also serves a small population outside its boundaries (Carriage Estates subdivision and Country Estates MHP). As of July 1998 the City of Evans assumed responsibility for the operation of the District system under an intergovernmental agreement for one year. The District is to be dissolved in 2001. Treatment is provided by two aerated lagoons, a polishing pond, and chlorination before discharge to an unnamed ditch. The ditch is tributary to Ashcroft Draw and then to the South Platte River. Rated capacity of the chlorination system has been re-rated to 0.5 mgd. The District's permit is scheduled to expire on April 30, 2004. The District is beginning a planning study to evaluate service area expansion possibilities, including the potential ability to provide sanitary sewer service to other jurisdictions. A wastewater utility plan will be prepared for the Hill-N-Park system upon completion of the planning study. • Hudson The Hudson wastewater facility was acquired by the Town of Hudson from the Hudson Sanitation District in 1997. The Town has assumed the role of operating agency for the facility and currently maintains the facility through a combination of a town staff and a contract certified operator. The facility includes a combination of two aerated lagoons, a polishing pond, and chlorinated discharge to Beebe Seepe Canal. The northern aerated lagoon is divided into a polishing pond while the original polishing pond remains idle I -42 at this time. Studies are currently underway with a consultant to evaluate the reactivation of the large polishing pond and other minor modifications to improve operating efficiency and enhance current operating capacity of the facility. Biosolids were removed by contract from the lagoons in 1999, and the next removal is anticipated 2006-2008. Hudson is also exploring the construction for a second WWTP in the newly annexed Hudson Industrial Park north of Hwy 52 and east of WCR 47. ^ The capacity of the plant is 0.197 mgd; and plant capacity, with reactivation of the large polishing pond, is expected to be reached by 203. The current Permit No. is COG-58100, and the facility is located in the NE % of the SW % Section 3, TIN, R65W. The permit expires on April 30, 2004. Keenesburq Facilities at the wastewater treatment plant of the Town of Keenesburg, include an aerated lagoon, polishing pond, and chlorination. Hydraulic capacity of the plant is 0.1 mgd with a BOD5 capacity of 231 #/day, using diffused fine bubble aeration. Current flows are about 0.071 mgd for a population of approximately 855. Discharge is initially to Sloan Reservoir, a private irrigation reservoir, and eventually to a dry ditch 30 miles from its junction with the South Platte River. The District was issued a new CPDES permit for this discharge in 1998 with an expiration date of May 1, 2003. The polishing pond and a storage pond with 4-5 months' storage capacity were deepened in 1990-91 to control algae and increase storage to allow the operator to retain flows and have no discharge if effluent quality doesn't meet permit limits. Additional aeration capacity should be added to the lagoons, and expansion is also expected to begin within the next five years. I -43 Kersey The Town of Kersey provides wastewater collection and treatment for its approximately 1,390 residents, and the volume of wastewater flow is presently about 0.09 mgd. The treatment plant is an oxidation ditch-type activated sludge plant with discharge from the secondary clarifier to an evaporation/percolation pond for disposal. Monitoring of ground water is required. Capacity of the plant is 0.18 mgd, and it is adequate to provide service to the community for projected growth for at least the next ten years. ^ Kersey's discharge permit expired on October 31, 1995, and they are operating currently under an extension. Due to the age of the WWTP, the Town is now developing a facilities plan to explore the construction of a new WWTP within the next three to five years. La Salle Wastewater treatment facilities for the Town of La Salle include an aerated lagoon system with an effluent rock filter and chlorination before discharge to the South Platte. The rated capacity of the plant is 0.46 mgd, while flow is averaging 0.25 mgd for a population of about 2050. A projected pop- " ulation of about 2,300 by the year 2005 should be adequately served by this facility. Lochbuie .401 The Town of Lochbuie is located in the Beebe Draw drainage basin just north of the Weld-Adams County line. The current population of the Town's service area; including Lochbuie and a portion of Bromley Park in Adams 1 -44 County, totals approximately 3,085 persons. The wastewater flows average approximately 241,000 gallons per day, with an organic loading calculated to be approximately 398 pounds of BOD5 per day. Treatment is currently provided by an aerated lagoon system with a combination of diffused air and surface aeration, a polishing pond and chlorination before discharge to the Beebe Seep Canal. The existing facility is rated at 360,000 gallons per day, with an organic loading capacity of 750 pounds of BOD5 per day. The Town has received approval to construct an interim expansion of the existing facility, using either a complete mix activated sludge approach or the addition of a modular mechanical activated sludge treatment component. The interim expansion of the existing facility would increase the hydraulic capacity to 690,000 per day and the organic loading capacity to 1,380 lbs BOD5 per day. Ultimately, the town intends to construct a 10.0 million gallon per day mechanical facility, with the first phase having a hydraulic loading capacity of 1.5 mgd. The first phase components of the proposed mechanical plant will include influent flow measurement, screening and grit removal, extended aeration activated sludge basins, final clarification and ultraviolet disinfection. Sludge stabilization will be accomplished through aerobic digestion and centrifuge thickening before the biosolids are hauled off-site for land application or other beneficial uses. r The DRCOG "Metro Vision 2020 Clean Water Plan" provides additional wastewater management planning information for this overlapping service area. The two areawide plans will be kept consistent for planning purposes, and any planning information differences will be addressed through the memorandum of understanding between the Areawide on a case by case basis. 1 -45 r ^ Pierce The Town of Pierce facilities include a triangular oxidation lagoon containing a submerged dike, dividing it into two cells. The north cell is aerated by three floating aerators, and the south cell acts as a polishing pond with no aeration. Discharge is then chlorinated and directed to three new rapid infil- tration beds for disposal. Capacity is 0.18 mgd, and current flows for about 900 residents and a meat processing plant are approximately 0.1 mgd. An influent flow recorder will be installed by the end of 1993, and a new downgradient monitoring well will be constructed if an appropriate site can be located. r , Platteville Platteville facilities include aerated lagoons, chlorination, and an outfall to the South Platte River. Capacity of the plant is 0.35 mgd hydraulically, and an organic load capacity is 494 #Iday BOD5. Existing flows for 2,370 resi- dents are estimated to be 0.19 mgd. Flows discharged to the river are reduced due to evaporation, but algae in the three lagoons in the summer cause the BOD5 and TSS limitations to be exceeded at times. The Town modified the plant in 1992-93 by constructing a wetland treatment system in a portion of lagoon #3 to reduce algae growth and improve treatment efficiency. The wetlands have proven to be effective. The remainder of lagoon #3 was abandoned. Platteville plans to remove biosolids from lagoon #2 in 2001, and is beginning long-range planning that may include ^ moving the treatment plant further downstream as one option. A change in ^ classification of the receiving water to Class la Recreation will limit bacteria discharge in the next permit and require additional disinfection. -46 Weld County School District RE-3J The Weld County RE-3J School District operates a package treatment plant to serve Weld Central High School near Keenesburg. The plant consists of two aeration basins, two clarifiers, and a chlorine contact chamber, with a capacity of 0.015 mgd. Current hydraulic load is about 0.005 mgd and ^ organic load is about 35 #/day BOD5. Discharge is to the unclassified Lowline Canal ditch, and sludge removed is hauled to Denver metro for treatment. BIG DRY CREEK BASIN (Weld County) Big Dry Creek flows north from the Broomfield area into Weld County and into the South Platte River just south of Fort Lupton. The only municipal treatment plant in the Weld County portion of this basin is that of Northglenn. Broomfield On November 15, 2001, all areas within the City of Broomfield will be detached from the other four counties in which it is presently located - Adams, Boulder, Jefferson and Weld - and will become the boundaries of the City and County of Broomfield. At the November 3, 1998 statewide elections, Colorado voters approved an amendment to the state constitution creating the City& County of Broomfield. I -47 The areas within Weld County to be included are generally between: • Weld County Road 11 on the east, • Weld County Road 8 on the north, • between Weld County Road 5 & 7 on the west and • State Highway 7 on the south. These areas are located in sections 22, 23, 26, 27, 33, 34, and 35, T1N, R68W as shown on the map on page 1-58. In 1999, the City of Broomfield updated their Utility Plan, which was approved by Denver Regional Council of Governments and North Front Range Water Quality Planning Association. The Utility Plan recommended a three-phase expansion of the Broomfield Wastewater Reclamation Facility to include biological nutrient removal, solids handling and wastewater reuse. As, The First phase of the expansion, scheduled to start the fall of 2001, will expand the treatment capacity to 8.0 MGD and add nitrification, denitrification and phosphorus treatment processes as well as solids dewatering processes. In addition, Phase 1 will include a 6 MGD wastewater reuse treatment and pumping processes. The City of Broomfield has developed a 3,200 acre-feet per year reuse system utilizing all of the western slope water in the effluent from the treatment plant Phase 2 of the expansion will expand the advanced wastewater reclamation treatment facility to 12 MGD. Phase 3 would ultimately expand the facility to 16 MGD. The current site location has the available land area to meet the space requirements necessary for the completion of all 3 phases. -48 The accepted Wastewater Utility Plan for the City of Broomfield contains all the necessary and appropriate information to be used in the site approval process for the expansion of the wastewater treatment plant and associated treatment works. It identified service area overlaps within the proposed new county boundaries extending into Weld County relating to the City of Northglenn and Dacono Sanitation District, and as a result, the plan was conditionally accepted. Once the boundaries for the new City and County of Broomfield were fixed, the Broomfield Wastewater Utility Plan would be amended to reflect the service area designations as agreed. As of this ^ update, these boundaries have now been fixed. The service area overlap with the City of Northglenn related to Sections 22, 26, 27, 34, and 35. As of this update, the City of Broomfield and the City of Northglenn have agreed on the service are boundaries as follows: The City of Broomfield is the management agency for sections 22, 26, 27 34, and 35. The boundary between the City of Broomfield and City of Northglenn service area is now Weld County Road 11, with the City of Northglenn as the management agency to the east of Weld County Road 11 and the City of Broomfield is the management agency to the West of Weld County road 11. The service area overlap with Dacono Sanitation district related to section 23. As of this update, the City of Broomfield and Dacono Sanitation District have agreed on the service area boundaries as follows: The City of Broomfield is the management agency for section 23. The north boundary of the City of Broomfield's service area is Weld County Road 8. Dacono Sanitation District is the management agency to the north of Weld I -49 County Road 8 and the City of Broomfield is the management agency to the south of Weld County Road 8. As provided by the June, 1992 intergovernmental agreement (IGA) with the City of Northglenn regarding the provision of wastewater treatment service for portions of Weld County, the City of Broomfield is continuing to evaluate options and costs. The Cities of Broomfield and Northglenn will continue to work together along with their neighbors to address any future requirements. r Northglenn ^ The Northglenn Wastewater treatment facility is located in the West '/z of Section 36, Ti N, R68W in Weld County at the intersection of Weld County Roads 2 and 11. Treatment consists of an aerated lagoon system with discharge through Bull Reservoir to Bull Canal, Thompson Ditch, or Big Dry Creek. There are three cells in each of two parallel trains of aerated lagoons with a total rated capacity of 6.5 mgd. A 4200 acre foot reservoir (Bull Reservoir) is also part of the treatment facility in order to facilitate Northglenn's water management exchange program with Farmers Reservoir and Irrigation Company (FRICO). .. Northglenn will require a capacity of 4.56 mgd to provide service within their corporate boundaries at build out in 2010. Their current average daily flow is approximately 3.9 mgd. There is 1.94 mgd of unused capacity available above their need at buildout. This capacity is available to the Cities of Broomfield and Thornton, unincorporated Weld County, and others within the vicinity of the treatment plant who may need wastewater treatment service. 1 -50 The City of Northglenn is the responsible operating and management agency for areas within its corporate boundaries as identified in the Denver Regional council of Governments (DRCOG) Clean Water Plan. Northglenn also provides wastewater service to two enclaves of the City of Thornton that are adjacent to Northglenn corporate boundaries. Wastewater is currently collected within these areas and transported to their treatment plant via a pressure interceptor. Northglenn has been designated as the responsible management and operating agency for their wastewater treatment plant (WWfP) area and as operating agency for areas adjacent to the treatment facility. Northglenn's service area for Weld County is as reflected on page 1-97. Northglenn was designated as the operating agency for this area by NFRWQPA in 1989. There is a joint management agency agreement between Weld County and Northglenn that defines management and operating agency roles for the unincorporated areas. In the Lower South Platte Study prepared by the DRCOG, the Northglenn WWTP was recommended as the most cost effective solution for providing wastewater treatment service for much of the Big Dry Creek Basin north of 136th Avenue in Adams County. Additionally, areas in Weld County adjacent to the treatment facility can be reasonably served by the Northglenn plant. Some of these areas have recently been annexed by the City of Broomfield • and Thornton. The City of Northglenn has entered into an IGA with The City of Thornton and Metro Wastewater Reclamation District defining roles for the service area within Weld County that has been annexed by Thornton. This IGA defines management and operating status for this area. I -51 ^ The projected populations to be served in the areas of Northglenn's service area will be dependent on the amount of development which occurs. Thornton and Broomfield have made planning projections for their respective areas. Broomfield's projections in their Wastewater Master Plan Update, for the areas to be served by Northglenn, are significantly higher than DRCOG's Traffic Analysis Maps and Database (TAZ)figures. Broomfield's wasteload projections for 2010 are 0.98 mgd compared to DRCOG's 0.3 mgd. Since these figures are rough projections and adequate capacity currently exists at Northglenn's plant to serve these areas, capacity should not be an issue until after 2010. The excess rated capacity in Northglenn's WWTP beyond what they will require to serve their own development by 2010 (2.7 mgd) will be adequate to serve development until 2010 in the areas of Broomfield within Adams and Weld Counties and Thornton in Weld County. The map of the areas to be served in Weld County is shown on page 1-97. Westminster and Broomfield both operate wastewater treatment plants that discharge to Big Dry Creek upstream of the Northglenn facility. Water ^ quality in Big Dry Creek generally meets the standards for dissolved oxygen and pH, while the fecal coliform standard is exceeded at times. Data indicates this is not from permitted treatment plants. Additional effluent dis- charged to the creek from the Northglenn plant should not have an adverse effect on the stream's quality as long as discharge permit effluent limits are met. Monitoring is performed by Northglenn, Broomfield, and Westminster; DRCOG has modeled the creek for D.O. No impacts have been identified with full utilization of the Northglenn facility at 6.5 mgd. Additional modeling for un-ionized ammonia may be needed with future increased discharges. 1 -52 No impacts to water rights are expected if Northglenn discharges treated wastewater to Big Dry Creek. Regional Facility A new regional wastewater treatment facility (Lower South Platte Regional Facility) is the designated long-term wastewater management strategy for the northern portion of the South Platte Urban Watershed. The minimum participants in the Northern Regional Facility Study are the City of Brighton, South Adams County Water and Sanitation District, and Metro Wastewater Reclamation District. In addition, Adams County, Weld County, Commerce City, City of Thornton, City of Northglenn and North Front Range Water Quality Planning Association should be closely involved in the planning effort. South Adams and Metro District wastewater treatment plants are expected to continue to provide wastewater service for parts of the service areas. The existing Brighton facility may be phased out if a decision is made to proceed with the regional treatment plant. For planning purposes, the general siting option for the Lower South Platte Regional Facility is the northern portion of the Central Adams service Area, in Adams County. The Lower South Platte Regional Facility construction trigger date needs to be reasonably consistent to accommodate all participants. The Northern Regional Facility Study should have a recommendation ready for the 2001 Metro Vision Plan Assessment Process. Work done as part of a wastewater utility plan will form the basis of the Clean Water Plan amendment. Based on current planning information, a regional facility is needed by about 2005 to serve Brighton, portions of Commerce City and Thornton, and potential future service areas in Adams County. By 2005, wastewater flows are expected to exceed the capacity of the Metro District's Brantner Gulch pump station and force main system. Diverting flows to a new regional facility may be more cost effective than expanding the Brantner system. The Lower South Platte Regional Facility could replace the Brighton I -53 treatment plant. The South Adams plant will continue to operate and treat wastewater from the southern portion of its service area with all northern wastewater flows diverted to the new plant. My new wastewater service area within Adams County should be treated by the Lower South Platte Regional Facility. r^ The initial capacity of the Lower South Platte Regional Facility will be established through the wastewater utility planning process. Consequently, no maximum size will be designated for this facility at this time. The initially estimated facility footprint acreage is about 80 acres, which should provide an adequate buffer and space for expansion. The facility design should include an evaluation for advance treatment of nitrogen with nitrification and de-nitrification systems. The water quality components and potential effluent limits for the regional facility will be addressed through the utility planning process. r r r 1 -54 n r^ �� MS9? (J co MD p, •H µ N,,,yNt+'t` * tr „ #, IV tU Ai... I I -1 I (/ CD in a ......_.,40,..e ?Li Oa .-. ,/ CrMli 'E LO la /// Q Q o - e a. _ ) I ______\ o - NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0021083 Town of Berthoud Permit Expired: 06/30/06 ^ Description of Treatment Facilities: Oxidation ditch, secondary clarification, chlorination and aerobic sludge digestion, land application of sludge by contract hauler. Discharge Location: Unnamed tributary to Little Thompson River at SE% Section 23, T4N, R69W. Stream Segment Classification: Class 2 Warm Water Aquatic Life, Class 1 Recreation, Agriculture. Service Area Population: Existing 2005 2010 2015 6,309 6,555 6,810 7,075 a' Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 0.904 0.66 2001 2002 Organic (lbs./day BOD5) 1,300 1,600 1997 1999 Effluent limits required beyond secondary to meet stream standards: None a' Estimated 5-year construction needs: The major UI reduction project completed in 1996 accomplished a significant reduction in flow. Future plans include continued rehabilitation of manholes and sewer lines within the Town. A new digester was constructed at the new regional treatment plant site in 2000. A new plant should be constructed at the site by 2003. a' I -58 o¢ zI c $a qua '" i. UMO..SULJO f vlil ct gt / r 0'Z 0't 0 u un ano no ,�a -�� A 2I II II 2 anoHltae i is 11111`5, }• /_ l-�.n / ',�� Nbl �• /yurw �a"Pin" -. . ' --1-112 \ m o 11- I11)12 ti -rgl £ £ 241 £ / £ £ C Nfl , , be CC ee v se --1--- 7t Se cE EE 2E £ t (--__ ..... _____,�� , . , s� 9' L2 / 82 62 pE :- A -.. 92 Lc 82� 62 0E �J �l 12 02 61 2 02 6l .••� E2 y2 E2 23 • 1111 T •, n , 9S O1O91-1-1‘1--I\i_< ( J// II S il 9[ CIa.: , ._ b[ 3: c 91ir_H bF ( \ • iIrI 2I 7 ill N\, I / • • t(-/ b 5 I5. la S 9 11 I I 2 ANbIIIIIINL mi xi 1•151 1 ≤.* e aSE I R. al. � oe se NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO.0020478 Boxekier Sanitation District Permit Expired: 7/31/05 Description of Treatment Facilities: Lagoons-2 aerated lagoons, 2 polishing ponds, chlorination, dechlorination. Discharge Location: Boxekier Creek near confluence with the Poudre River. Stream Segment Classification: Class 2 Recreation, Agriculture, Class 2 Warm Water Aquatic Life. Service Area Population: Existing 2005 2010 2015 7,831 10,956 17,206 23,456 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGM 2.34 1.70 2003 2006 Organic(lbs./day BODS) 3,200 1,958 2004 2006 Effluent limits required beyond secondary to meet stream standards: N/A Estimated 5-year construction needs: ti Correction/Removal, upgrades to the existing plant to increase its capacity to 4.5 mgd hydraulic and 6,000 lb BOD3/day organic, possibly building another plant south of Harmony road, and additional lift stations. I -60 . -- ... ..r ... ..i "I.. - ....• ..r \n• . v/ +.. ... ... "me . ..,i .—, _• ./ . . . . . •No/ ./ ... ... ,- r: ..i•.:. � r'". J r 27' 1.:',.fzR .. I �' • t e r' �F E rr•-•,-.) • • I. I { 5. ' �f rb'.r i'•_ f�.' ( t f .�' r•' ) � �iE I I •r 1• Ir ,.\-, 'P^ r1 /.',l . r-f •r- r r : 'r -i• ^ �'`I ; I ` 1 ...• • '....•' •:T•' r'.f 1 !'; in,-, • I ''`? , , ,M 1 t • . ..:)iiir en Ill PI ZR:j A**) • • . 1 ,... ..._ ;7' P. 2 Al\ s . I . i • • . c. .1 , r --/"- /7 c.-t 1\\ I -, i 1, - - : '.l't i • . I iiiiiii • • ,,, , . lb , • --2: ,-,..- .. ,t!‘:,..2;41k.._. -,i...,.../. '4-7,„•_.,,,,...07-. . . i ... i , II,T .— , • I. ! '- J, /�`, / t s�... I J 1 i 13 i / 41 I. 'ti A 1'&' A ` 5\ • i I `\ 1 t.,..- ,,/ ...... :/./.,(/ / )(„ ,, \ I \ ; • • .' .." •-• i. •'i„V/ / ////i/ -- • % *--',I \ill\ ( , . \ ,-.-...x i? . J J { / 1/ ;�: • y .� ,' / kJ ' .'•f `, I ,�.• . ti► " iii • / ' • l'" , "I..' ' :' % ; // /,/ �* `.I \ I 1• ••� .' '�: / J err f'• %.! �//(- !'! _ .c„.. . • • *tit: • • . lk I .a • • �.' `TTY' "1,...i,./•••'" k..- e' — - _ ....irk:, •_ >. { '-- , II' 171{771.11i:Ti . . i.. .• . . ; {11711lli --N 11"1 ,, , , I BOXELDER SANITATION__ DISTRICT` '•.---- Boxelder S. D. S. Fort Collins S. D. ., .... ...••.: • ! ;; Fort Collins 1 ,,rr : Wellington Loveland Windsor o 1.0 Z.o El I�1E r..f..„ - •, . "i :-; . - i , miles 12-3-01 NFRWQPA 2001 WATER QUALITY PLAN UPDATE • Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0026409 City of Broomfield Permit Expired: 03/31/98-extended Description of Treatment Facilities: Primary and secondary settling, biotower, activated sludge secondary treatment, U.V. disinfection, anaerobic digestion, and land application of biosolids. Discharge Location: Big Dry Creek in Adams County. Stream Segment Classification: Big Dry Creek- Class 2 Warm Water Aquatic Life, Recreation Class 2, Agriculture. No classification on others. Service Area Population: Existing 2000 2005 2010 39,108 43,303 48,993 55432 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 544 5.02 1997 2002 Organic(lbs./day BODO 10,300 7,492 2003 2007 Effluent limits required beyond secondary to meet stream standards: Inorganic limits may include ammonia, cyanide, sodium, boron and nitrate. Metals may include arsenic, beryllium, cadmium, chromium ill or Vi, copper, iron, lead, manganese, mercury, nickel, selenium, silver and zinc. Estimated 5-year construction needs: The City of Broomfield has completed phase 1 design efforts to expand and upgrade the City's 5.4 MGD secondary treatment facility to a 8.0 MGD advance nutrient removal and 6.0 MGD reuse reclamation facility. Construction is expected to begin in October 2001. The target completion date is September 2003. Phase 2 design will occur during the phase 1 construction. Phase 2 will expand the City's Wastewater Reclamation Facility to 12 MGD. The projected phase 2 construction is expected to be completed in 2006. I -62 1 1 ) ) ) 1 ) 1 1 ) ) 1 , ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ? ) \ , . \\,))/-. ///./././.. /// i•r •/ .///- • //17/ ./ / • 1 . . . ' / //// . -- - - -- - \ r • • �// ,.//,/ �� % /i '� /, i HlN BROOMFIELDCO / .,.: . ..._. CK CC 1..--1 Broomfield i i..- I i Dacono S. D. i 12Erie . , A i , ., , i2 . . k � St Vrai n S. D. //%' NN i /.////////,' Weld County:9 1-4. i.._. 0 0. miles 12-3-01 NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Perrnit#: -WA Dacono Sanitation District Permit Expires: N/A Description of Treatment Facilities: Collecting system to transport sewage to the Weld County Tri Area Sanitation District treatment facilities. Discharge Location: Weld County Tri-Area Sanitation District. Stream Segment Classification: N/A • Service Area Population: Existing 2005 2010 2015 3,600 4,150 4,775 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) N/A 0.3 N/A N/A Organic(lbs./day BODS) N/A Effluent limits required beyond secondary to meet stream standards: WA Estimated 5-year construction needs: Additional interceptor sewers towards the WCTASD treatment plant from the development occurring to the south of the current City core. I -64 111 1 — F-1 \ ',\ \ /fa -- \ �. dN , ` � 11N I ' � I y !•-• I I iv I • 1 • 1 r• 0 11 1 12 •' I -- i It} _TIT- 5 4 , 13 8 ; .. / •• a q 19 i =P • H 3 . DACONO SANITATION DISTRICT " - .. P Dacono S. D. // Broomfield !---1 Weld County -®- T_ Northglenn Tri-Area 5. D. ...... 0 0.5 1.0 miles 12-3-01 r. r NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: -CO-0023116 Town of Eaton Permit Expires: 11/30/01 Description of Treatment Facilities: Oxidation ditch, secondary clarification, disinfection, aerobic digestion, drying beds. Discharge Location: 30 yards south of East Collins Street in Eaton Draw. Stream Segment Classification: Class 2 Warm Water Aquatic Life, Class 2 Recreation, • Agricultural. Service Area Population: Existing 2005 2010 2015 3,000 3,385 4,035 4,800 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design -. Flow(MGDI 0.340 0.175 2005 2007 Organic (lbs./day BODS) 887 449 2005 2007 Effluent limits required beyond secondary to meet stream standards: N/A Estimated 5-year construction needs: Site applications have been submitted for two Lift Stations to pump sewage to the existing plant for 2 new subdivisions. I -66 10-f-L[ sanw I a I OI 50 0 .•.. U0403 i.._..i NOJYB 3 LI 9 I AL I � � e a Ti al 1 mr pfl O, C E F ' N91 ,••••i %� '= NL1 �a \ .a cc 79r S£ i N 1 i J 82 ti 1 6 i, � \—S �\ 92 i s I I / L ....., 1 0 61 -- \kill ,t:a ( NFRWQPA 2001 WATER QUALITY PLAN UPDATE Maior Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0021831 Town of Erie Permit Expired: 3/31/99-extended Description of Treatment Facilities: Activated sludge with secondary clarification, ultra-violet disinfection. Discharge Location: To Coal Creek, Segment 78 in the SE corner, NW% Sec. 18, TIN, R68W, approximately 2.1 miles upstream of the confluence of Coal and Boulder Creeks. Stream Segment Classification: Class 1 Recreation, Warm water 2 Aquatic Life Agriculture. Service Area Population: Existing 2005 2010 2015 7,218(PE) 19,300 28,100 33,100 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGM 0.80* 0.6 2001 2002 Organic(lbs./day BODS) 1,764 1,329 2001 2002 A site application was submitted to rerate the capacity of the existing treatment plant from 0.6 mgd to 0.8 mgd. Effluent limits required beyond secondary to meet stream standards: Ammonia removal, anticipated most stringent limits to be 6.6 mgA ammonia nitrogen for November thru February for discharge to 0.8 mgd. Fecal colrform bacteria, 200 organisms/100 ml. Estimated 5-year construction needs: Expansion of the existing treatment system from 0.8 mgd to 1.9 mgd is currently under design with construction expected to begin in the fall of 2001 and be completed the summer of 2002. I -68 1 / -- 2 1 1 i n 1 r u 43 el ( J4L Atipxy..y _ _. f I 2t, ', k --- - J -- f -- I�. l �� 2 33 iiii/ 4444, /t�.2N /4 / /^ 1 TIN ////JJJ� IS / ,. ... > 3 / )J 6 P P �l \ d b K K : ? 7 I l/ i ��✓I 47 �� f� ' It, / / , ,``, - L_, , r / , � i —+r j ) \, � .- ' - - - C 1 r htip/ / 19 ( 20 21 21 c� \y 23 2a �� -7\ f /a elb I I+ 28 / 2) 265 I � o �a9 zs �' } A., 11T. ) �a 35 36 `1)� 31 32 '.., t Adams County I. ERIE - I! Erie l% Broomfield !L,_ li St Vrciin 5. D. 0 1.0 2.0 miles 44.. 12-3-01 NFRWQPA 2001 WATER QUALITY PLAN UPDATE A. Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0020290 Estes Park Sanitation District Permit Expired: 10/31/99-extended Description of Treatment Facilities: Flow equalization, activated sludge, clarification, chlorination/de-chlorination, aerobic sludge digestion and land application. Discharge Location: Big Thompson River, Segment 2 in the SW%. of SW Y of Section 19 & NW% of NW Section 30, T5N, R72W. Stream Segment Classification: Class 1 Cold Water Aquatic Life, Class I Recreation, Agriculture, Water Supply. -, Service Area Population: Existing 2002 2007 2012 II. Permanent 3300 3435 3790 4185 III. Transient/ Seasonal 3400 3475 3650 3850 ^, Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design -. Flow(MGD) 1.5 .915 2010 2016 Organic (lbs./day BOD.) 3300 2000 2010 2016 Effluent limits required beyond secondary to meet stream standards: Currently None. Estimated 5-year construction needs: Short-term improvements include the addition of continuous chemical feed capabilities coupled with internal piping changes for increased ammonia removal and pH control. Also biosolids thickening for improved efficiency and flexibility of operations will be considered. Long-term improvements include possible clarifier modifications as flow increases dictate. Collection line replacements will continue on an annual basis. I -70 l-, ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) -1 ) ) ) ) 1 ) ; ) 1 ) ) : 4 1 9, i _ mss_ --� -- i vz_ __ __ _ __ _ ___ _ __ _ . __ ._ , , _ I � , .� r�y''i , , 1 , „, , , ,, . , , , _ 7, „,:_,_ . . . / ESTES PARK 5. D i_ _! Estes Park 5. D. - ii, Upper Thompson K . '6 - S. D. 0 0.5 1.0 ./ miles 13-3-01 / , -...r1 '' / NFRWQPA 2001 WATER QUALITY PLAN UPDATE Maior Point Source Inventory Data Operating Agency: NPDES Permit#: CO-O020508 City of Evans Permit Expires: 09/30/99-extended Description of Treatment Facilities: Two aerated lagoons, rock filter, polishing pond, chlorination and dechlorination. Discharge Location: Segment 2, South Platte River in the SE%of Section 20, T5N, R65W Stream Segment Classification: Class 2 Warm Water Aquatic Life, Class 2 Recreation, Agriculture Use. ^ Service Area Population: Existing 2005 2010 2015 ^ City of Evans 9,225 9,800 10,093 10,396 Urban Growth Area 10,600 11,104 12,438 13,463 (Service Area) Capacities: Design Existing Year at 80% Year at 95% -� Capacity Load Design Design Flow(MGD) 1.2 0.92 2003 2010 -- Organic (lbs./day BOD) 2,772 1,851 >2,010 Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: 1) Continue monitoring the collection system to identify infiltration problems. Repair or replace inadequate lines as funds allow. 2) Install a new influent measuring device, pumps, and screening equipment. I -72 ) ) ) ) ) ) ) .) ) ) ) ') ) ) ) ) ) ) ) ) ') ) ) ) ) ) ) ) ) ) ) ) ) 1 ) i 1 ) y ) ) ) ) ' / 1 . A ___, \ _, , ,.. / / irif , • I i i , , , ,„. ., rA. _ . .. , ,, ■ ( i if } S 30/ 29 EVANS •i.._. Evans ,),-_-„,,,,,,ii �� / I 4 Greeley T 5 € ■ / f L / E LL ti La Salle .••. V0 3 �. 0 os i.o 36 -, ''` /1 miles �z-a of .•'I I _ a _.. Kn'` NFRWOPA 2001 WATER QUALITY PLAN UPDATE Maior Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0026425 City of Fort Collins Permit Expires: 07/31/05 Description of Treatment Facilities: Conventional secondary treatment facilities consisting of primary clarification, trickling filtration, biofilters, activated sludge, secondary clarification, chlorination, dechlorination;and biosolids thickening, digestion, composting and beneficial use facilities. Discharge Location: MWRF outfall 001A to Segment 11, Cache La Poudre River; DRWF outfall 0020 to Segment 11, Cache La Poudre River; DWRF outfall 0028 to Fossil Creek Ditch; and DWRF outfall 0058 to Rawhide Power Plant. ^ Stream Segment Classification: Cache la Poudre, Segment 11: Class 2 Warm Water Aquatic Life, Class 1A Recreation, Agriculture. Service Area Population: Existing 2005 2010 2013 2020 119,000 123,400 133,600 139,500 142,906 �. Capacities: Design Existing Year at 80% Year at 95% Capacity Load* Design *"` Design ** Flow(MGD) 29 19.0 2002 2006 Organic (lbs./day BODS) 67,007 33,178 none none projected " Max month in 2000 **This assumes flow from Anheuser-Busch. Effluent limits required beyond secondary to meet stream standards: Outfalls 001A, and 0020: Total Residual Chlorine and Chronic Whole Effluent toxicity. Future possible limits of concern: ultra low level mercury, total inorganic nitrogen, phosphorus. Estimated 5-year construction needs: At DWRF— 2003-2004: Add a third aeration basin and final clarifier, and a WAS/RAS pump station on site. 2004-2005: Add denitrification processes, intermediate clarifiers, and bar screen/screenings press. Decommission Resource Recovery --� Farm. 2005-2006: Upgrade existing final clarifiers and add a second DAFT. Provide enhanced odor control. I -74 1-r 1111 I f ! • h. if A \) 3 � 34 35 36 •• 1 ALI,et T r7 a Thi \ dL { - -�- ) ill v • r y 17 ) 16 IS S 1 13 +4. PLC.. \� I� 1 r4 20 22 3N. �.,,, f , .1 ? lillp -- -- - _....e9 28 27 �6 �__ • 2s �_- -- » 2 ii n tl' ✓ � ` 11I� ,\ T7N [ ''''//';'/'/27;//://e/ y . .2 /7./ / / / / / FORT COLLINS �'- y i Fort Collins / / 71 5 . Fort Collins 5 . D. //4 T_ /i/A Boxelder 5. D. 0 1.0 2.0 miles '�' '�% / 12-3-01 NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0021440 City of Fort Lupton Permit Expires: 12/310/59 Description of Treatment Facilities: Oxidation ditch secondary treatment operated in complete mix aeration made, clarification, and UV disinfection. Biosolids are treated in aerobic digesters, dried, and land applied. Discharge Location: South Platte River in the SE %of the SW 14 of Section 31, T2N, R66W. Stream Segment Classification: Class 2 Warm Water Aquatic Life, Class 1, Recreation, Agriculture. Service Area Population: Existinq 2005 2010 2015 6,375 7,035 7,771 8,580 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 2.75 1.24 2012 >2015 Organic (lbs./day BODS) 4,355 1,817 >2015 Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: A major new lift station and interceptor to serve new city growth, another clarifier, upgrade of UV system and some lift stations and force mains, and I/I study. I -76 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) i i ' i -, � -• ,� , F N / ---- _ r F i �AA:_ i ! - ..J -----_-- T2N I _ T1N NiI I I 3QD j L 2 a \ID '.0 f f j \it I A / J J I / I , FORT LUPTON �� .-- t• i I = i �_--! Fort Lupton / \.___- x r O tl 0 0.5 1.0 ---.. \ 1 miles iz>01 _ i i �� NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES`Permit#: COG-582030 Fox Acres Community Services Corp. Permit Expires: 07!31/04 Description of Treatment Facilities: Aerated lagoon, polishing pond, chlorination. Discharge Location: Columbine Creek in the SE 54, SW 5, Section 22, T10N, R73W, tributary to ^ North Fork Cache la Poudre River, Segment 8. Stream Segment Classification: Class 2 Cold Water Aquatic Life, Class 1 Recreation, Agriculture Service Area Population: Existing 2005 2010 2010 140 188 250 336 Capacities: Design Existing Year at 80% Year at 953 Permitted Capacity Load Design Design Flow(MGD) 0.035 0.07 0.053 max. 1999 2005 Organic (lbs./day BOD5) 180 150 97.0 max. 2002 2005 Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: None, however the company is currently requesting an ^ increase in their permitted flow to 0.07 mgd. -78 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) 1 ) ) ) ) ) ) ) ) ) ) ) ) / / _ _-- i \ i I - - - Y , i v lipb,,,„., , _ . I . I ibit ( ____/- N• c7 FOX ACRES i ' P 1 _ 1 Fox Acres ir T)oN 3 , 0 02 04 + cn I T miles 12-3-01 / NFRWQPA -. 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0043320 Galeton Water& Sanitation District Permit Expired: 5/31/04 Description of Treatment Facilities: Three (3) basin sewage lagoon treatment, 2 aerators plus chlorination, dechlorination. Discharge Location: Willow Creek, a tributary of Lone Tree Creek and the South Platte River. Stream Segment Classification: Class 2- Warm Water Aquatic Life, Class 2-Recreation, and Agriculture. Service Area Population: Existing 2005 2010 2015 265 290 344 380 -� Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MG()) 0.0185 0.01 >2000 Organic (lbs./day BODS) 38.5 18 >2000 Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: An evaporation pond/wetlands project in about 4 years.*The District will investigate wetlands disposal of plant effluent and use this method if it is feasible. Aerator replacement and biosolids may be needed. 1 -80 I tors. / 1 . T7N I T6 \ ' 3 3 • • I I `o „ iv ry 1 , , 1 Ii... GALETON _i Galeton 0 o.z o.a ^ miles NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0041653 Town of Gilcrest Permit Expires: 01/31/04 Description of Treatment Facilities: Aerated lagoons, polishing pond, chlorination, and dechlorination. Discharge Location: South Platte River in the SE Y. of SEX of Section 24, T4N, R67W. Stream Segment Classification: Class 2 Warm Water Aquatic Life, Class 1 Recreation, and Agriculture. Service Area Population: Existing 2005 2010 2015 1,160 1,200 1,300 1,300 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 0.196 .1 Beyond 2010 Organic(lbs./day BOD5) 466 160 Beyond 2010 Effluent limits required beyond secondary to meet stream standards: N/A Estimated 5-year construction needs: Lining of number three pond.. 1 -82 r yr At"" / ♦' r 1 x. 1,i x - 1 1 r I I 1 i 1 „ I ..„ . .. .. _ _ _ _. _ _ _.. _ _ _ 4 _ T4N ,,,, ..... xx,,, yRC' a IY Os -01 • • 33 Th GILCREST Gilcrest -+ , 0 0.2 0.4 • miles 12-3-01 r r NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: -CO-0040258 City of Greeley Permit Expires: 07/31,175 Description of Treatment Facilities: Primary and secondary settling, activated sludge secondary treatment, chlorination, dechlorination, anaerobic digestion, and land application of biosolids. Discharge Location: SW Y., SW Y., Section 4, T5N, R65W to the Cache la Poudre River at .. approximately 5 miles above mouth. Stream Segment Classification: Class 2- Warm Water Aquatic Life, Class 1a Recreation, and Agriculture. Service Area Population: Existing 2005 2010 2015 76,900 86,200 92,700 105,900 Capacities: Design YEAR Year at 80% Year at 95% Capacity 2000 Design Design Flow(MGD) 14.7 8.07 2010+ Organic(lbs./day BODO 49,470 20,336 2010+ Effluent limits required beyond secondary to meet stream standards: 30 day average limit for total ammonia ranges between 5.0 and 20.0 mg/L, depending upon the month and the effluent flow. Estimated 5-year construction needs: Construction of odor control measures at the WPCF. I -84 -. or Il'3593 CO23 2s / 24 a - ' v A I.�_ ti.♦ '"'*m 1 26 25) -� ---3�� 29 cc 26 25 1 ; <_ 25 'Y. .. .,.3„�. \ _- n ,, `t 32 _, a, SI 6 • Pre Ct ill ib '� ' - 1 / , � f �'' i-�.r I !.... 1377-:. .. 1 , 1 /41 ; ,,,,,./2 \ , 10 1 9 ,,;[/-1 Id z C \ ,e v IC r -- -- r2ri ____75_027-49-....___,/, - r I ii F C r r: ^, �. �.. ::1 arc :�. ..� cal i5 .�.fi:. c" I 24 rr• rr rr r rr c i r ' i / /,e a-'/8 7 IIN . 4 / , 25 � -5^ H sI .� �' ✓ GREELEY = -ter ��) I um 0 _.._ - - � � Greeley e r � ': ! La Sall N - + �. . �,✓ ✓✓ Milliken -.nom _ �� I - IT5N. Evans - �6T{- II 'J � — IT Hill-N-Park `��' ; , scr 0 1.0 02. ..�� miles �' 12-3-01 NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: No Permit Town of Grover Permit Expires: Description of Treatment Facilities: Aeration pits, discharge to land. Discharge Location: NW%of NW%of Section 4, T10N, R61W Stream Segment Classification: N/A Service Area Population: Existing 2000 2005 2010 140 150 160 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 0.03 0.01 Beyond 2000 Beyond 2000 Organic (lbs./day BOD) Effluent limits required beyond secondary to meet stream standards: N/A Estimated 5-year construction needs: None I -86 r. r I I , T 7 N ' I T 6 N ' 3 ? I QD I ' CY 1 r r. GROVER r:j Grover ,., 0 0.2 0.4 r miles 12-3-0I e^ NFRWOPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-582009 Hill-n-Park Sanitation Permit Expires: 07/31/04 Description of Treatment Facilities: Aerated lagoon, polishing pond, and chlorination. Discharge Location: Unnamed ditch tributary to Ashcroft Draw in NW 34, Section 36, T5N, R66W, thence So. Platte River. Stream Segment Classification: Recreation Class'1, Aquatic Life Class 2 Warm, Agriculture. �. Service Area Population: Existing 2005 2010 2015 2,400 6,262 6,575 6,904 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGDI 0236 0.24 2002 2003 Organic (Ibs./day BODS) 753 480 2002 2004 Effluent limits required beyond secondary to meet stream standards: None -- Estimated 5-year construction needs: Rerating of capacity to 0.5 and improvement of facilities, through the addition of more aerators, removal of sludge, enlarging of chlorination capability, _ redirection of flows, and other controls is underway. -88 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) 1 ) ) 1 ) ) 1 ) ) ) ) ) ) y ) _Art' � jf 9 20WIUILWIILU / / �/ ( - I, --"\„_,..---,,, / / / //a/ __.k f / 7 / // ,/, ill‘ I �� i /; 31 32 ,�.... .3J/f il 35 36 -i 3] / HILL-N-PARK 5. D. }" ,..- J 1.N_ F Hill-N-Park 5. b. -1 -�- - ;, '\- Evans . . .. m / i H+a IGreeley , �� ,�I r., , 1 i � ) i �� Milliken I 9 ° � 2 � 0 0.5 1.0 miles 12-301 / 7 NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-O029581 Town of Hudson Permit Expires: 04/30/04 Description of Treatment Facilities: 2 aerated lagoons, a polishing pond and chlorination before discharge to the Beebe Seep Canal. Added influent flow meter in 1988 and ozone aeration in the third cell in 1994. Discharge Location: Beebe Seep Canal in the SW X, NE %, Section 4, T1n, R65W. Stream Segment Classification: Unclassified irrigation ditch. Service Area Population: Existing 2005 2010 2015 1,565 4,414 8,612 11,285 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGM 0.2 0.152 2001 2002 Organic (Ibs./day BOD) 395 315 2001 2002 -� Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: IA corrections where appropriate and cost effective. — Adjustments in plant operation and detention time are being made to improve treatment — efficiency. Hudson is in the process of completing a 201 Facility Plan to determine their best — long-range course of action. In the interim, the Town plans to modify and deepen the existing lagoons and add a bar screen and grit chamber. I -90 . W-E-21 sap! 9..0 E..0 0 uospnH i____ NOSCMH t - - - I s I 1 / j it elI / I NZl ! S�. bE • 7// _______71 cSE -- N � r ma • ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( C ( , NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit-#: CO-0021156 Town of Johnstown Permit Expires: 07/31,02 Description of Treatment Facilities: A three cell aerated lagoon system. The first lagoon (5.3 acres)is aerated followed by two polishing ponds in series (4.8 acres), and chlorination. Effluent is discharged through a pipe to the Little Thompson River one-half mile to the east. Discharge Location: North of State Highway 60 approximately 12 miles east of Johnstown in the S i4, Section %, T4N, R67W, Little Thompson River, Segment 9. Stream Segment Classification: Recreation Class 2: 10/16- 4/30, Class lb 5/1 - 10/15, Class 2 Warm Water Aquatic Life, and Agriculture. Service Area Population: Existing 2005 2010 2015 Central Facility 3,000 7,000 10,000 15,000 Low Point Facility 0 2,500 3,750 5,000 Capacities: Design Existing Year at 80% Year at 95% ^ Central Facility Capacity Load Design Design Flow(MGD) .420 0.35 2001 2002 Organic (lbs./day 854 700 2001 2002 BOD5) Effluent limits required beyond secondary to meet stream standards: PELs received May 2001 indicate extremely restrictive ammonia standards based on questioned background data. The Town will be conducting additional stream/effluent monitoring. Estimated 5-year construction needs: The existing (central facility) treatment plant will need to be expanded by 2001. Johnstown also has plans to build two new treatment plants to the northwest and southeast of town center, called Low Point and Cross Point plants, respectively. The plants ^ will have about 0.5 mgd of capacity using activated sludge treatment A site application for the Low Point was approved in May 2001; the Cross Point site is currently in discussion due to Johnston annexations and Berthoud annexations in the same general area. I -92 TO-E-El saliva 0'2 0'T 0 ua -'' Aaiaaus i_ ___ i �1IIWI'� J� poaW pnotltua8 r; _©_ - IT pualano-1 t_: _ ; unno.�su�or ;.._..i NMOISNHOE 4e i £8 2E tE .• . N , j r IP ilia ii f I . op- si J I Srii _ _r � l, 1 � ,� �j F .; r I _. r r iJ ,.� 1� lllt lb - r7 r1 1 �_ rr�r, 1 r s s f r.r rr2- rr, '� �2 2 6I b2 i'� r ,f r r �, _fa 1 .//// r1�r nil_ ill I j f`- -�� i� r fri f rrr rf, l1 l•-J�1 ��r1.r�-�r� 9I Ll 8� b 9t r-_ f err .FT 6 � IIIi ill V CO r �� ruse if if r f 1 f 'F' �j� r �fJ"I f J I, t� z£ Ie 9E se 0£l , , EE r- r r rs ��1 1 - le , �J j� r�j ea 1 OE sz 92 sa ! J..r_f rff l J I I If f s nrc rrriI _ is r 1 �r r f 12 02 61 b2 V «. .�a7. Fil ii ei- Ire is c rr \ 1 `»,., �r 1 i _ _ _ _ _ -_ --._...-.. 4._._-.._...-. p.�.__. 9 —t_ OI 8 2 It I 01 6 ...' J : - m ' � NFRWQPA 2001 WATER QUALITY PLAN UPDATE Maior Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0041254 Town of Keenesburg Permit Expires: 05431/03 Description of Treatment Facilities: Aerated lagoon, polishing pond, chlorination, in the NW 1G of SE % of SE '/. of Section 26, T2N, R64W. Discharge Location: Sloans reservoir-farmer's private pond-used to irrigate fields, slight discharge to intermittent draw. Stream Segment Classification: none Service Area Population: Existing 2005 2010 2015 855 1,000 1,200 1,500 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 0.1 0.071 2002 2005 Organic(lbs./day BODE) 231 90 >2005 Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: Additional aeration will be needed in the foreseeable future. Lagoon expansion is also needed due to increased flows. I -94 Pa' 23 r r _ '1 1 1 K i 1 I 1 �t, } 1 -1 1 Jj' LE ^ k{C - - - -,r` I- - - - - - - - - _ 1 --,/ -,- •••-- -4------ I Ato- r N I 35 „ KEENESBURG 7 % l i Keenesburg — 0 0.2 0.4 %I / 1 1 /` 7 / miles 12-3-01 NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: -CO-0021954 Town of Kersey Permit Expired: 10/31/95- extended Description of Treatment Facilities: Oxidation ditch, activated sludge plant with discharge from -, the secondary clarifier to an evaporation-percolation pond for disposal. Discharge Location: Groundwater in the SE % of Section 15, T5N, R64W. • Stream Segment Classification: No discharge to surface stream. Service Area Population: Existing 2005 2010 2015 1,385 1,550 2,000 2,500 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 0.18 0.09 >2010 Organic (Ibs./day BODS) 500 145 >2010 Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: Kersey is currently working on a facilities plan to explore ^ the construction of a new WWTP. I -96 17 16 NRI } r•-• 29 28 KERSEY 1 Kersey 0 0.2 0.4 T5N miles iz-3-0, NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: COG-0584058 Town of La Salle Permit Expires: 12/31/04 Description of Treatment Facilities: Aerated lagoon with rock filter and chlorination and dechlorination then discharging into South Platte River. An expansion lagoon directly to east of main lagoon for future expansion if ever needed. Discharge Location: Into the South Platte River, Segment 2 (Region 2) in the SE%of SE 54 of Section 29, T5N, R65W. Stream Segment Classification: Class 2 Recreation, Class 2 Warm Water Aquatic Life, Agriculture. Service Area Population: Existing 2005 2010 2015 1,892 2,900 3,000 3,100 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MOD) 0.46 0.25 >2005 Organic (lbs./day BODO 1,841 484 >2005 Effluent limits required beyond secondary to meet stream standards: N/A Estimated 5-year construction needs: Sludge removal from aerated lagoon, division of aeration basin, and upgrade of aerators. 1 -98 r ... I n- t - - - - J ti: ^ T 5 N J c � T 4 N I .. ,"---/ / ... , II �(� `LI) / \\-%.---------.\ / LA SALLE La Sal le 0 0.4 12-3-01 NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-581000-1 Town of Lochbuie Permit Expires: 04/03/04 Description of Treatment Facilities: Aerated lagoons, polishing pond, diffused air, surface aeration, chlorination. Discharge Location: Beebe Seep Canal in the SE 34 of NW'X of Section 31, TIN, R65W. Stream Segment Classification: Unclassified irrigation ditch. Service Area Population: Existing 2005 2010 2015 3,085 12,600 25,600 38,000 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 0.36 0.241 2001 2002 Organic (lbs./day BOD5) 750 398 Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: Construction of the first phase (1.5 mgd) of the new mechanical WWTP that will have hydraulic loading capacity of 10.0 mgd at service area build- out. 1 100 ) ) ) ) ) ) ) ) ) ) ) ) ) ) 1 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) 1 ) 1 ) ) ) 1 ) ) ) ) 1 ) ( e)7-1 22 23 24 19 J 28 27 ! I 26 25 30 i f fr /� 4 35 36 "73 3 3 . LOCHBUIE I ( � L'¶ illi LOChbule I Weld County N ) T1N / Adams County 0 0.375 0.75 miles 12-3-01 NFRWQPA 2001 WATER QUALITY PLAN UPDATE Maior Point Source Inventory Data Operating Agency: NPDES Permit#: CO-026671 Town of Longmont Permit Expires: 02/28/98-extended Description of Treatment Facilities: Discharge Location: Saint Vrain Creek in the NW % Sec 11, T2N, R69W Stream Segment Classification: Class 1 Warm Water Aquatic Life, Class 1 Recreation Service Area Population: Existing 2005 2010 2015 73,344 80,000 84,000 87,000 Capacities: Design Existing Year at 80% Year at 95% Capacity Load * Design Design Flow(MOD) 11.55 9.72 2000 2002 Organic (lbs./day BODS) 23,000 Effluent limits required beyond secondary to meet stream standards: None now, but ammonia limits are expected when permit is renewed. Estimated 5-year construction needs: A project is currently underway to expand the plant capacity by 17 mgd by 2002. -. 1 102 -. 1 ) ) ) ) ) 1 ) ) ) ) 1 ) 1 ) 1 1 1 1 1 1 1 ) ) ) ) 1 1 1 ) ) I 1 1 1 ) ) ) 1 1 1 ) ) ) 7 Boulder County -------1X69W--- \R :I:T. R 6 8 W ru Z i ______7 t -O 1 0 r r- \ )-- - y \ mil! I , /Z O // ;.: 4--- \s, \\\u \ck\NN \ N\ ,:\\\\\\\\. \ NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0026701 City of Loveland Permit Expires: 12/31/00- Extended pending new permit Description of Treatment Facilities: Activated sludge, trickling filter, clarification, chlorination, dechlorination, and anaerobic sludge digestion. Discharge Location: Section 19, T5N, R68W-Big Thompson River Segment 4. Stream Segment Classification: Recreation Class 2: 10/16- 4/30, Class 1b: 5/1 - 10/15, Class 2 Warn Water Aquatic Life, and Agriculture. Service Area Population: Existing 2005 2010 2015 50,600 57,742 65,848 73,950 Capacities: Design Existing Year at 80% Year at 95% Capacity Load * Design Design Flow(MGD) 8.0 5.6 2015 2022 Organic (lbs./day BODS) 12,500 12,041 1997 2000 *peak monthly average Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: Expansion to 10 mgd and 16,000 lb/day BOD capacity ., and UV disinfection at a cost of about$11 M by 2004. 1 104 I ) \ a ') I, LOVELANb 2 N , ) ( k- 41 _f_L.I __J _ i Loveland {/ �_-f ---� �.._ _ U 0 29 _. .. L—.. G'� ;' M- Berthoud �-- i Windsor u f� , ui - V � _ T Johnstown o i.o 2.0 II I i ' `— p' - miles ' � 31 32 '33 � 12-3-01 ) n j T6N ' l a TSN � 5N ix of tea I 1/40 NIL / cm a I it 1 i \--\ k 7 / 8 5 n IG 12 �I -\ _ , Y X2 .61 1 9 �l er 16 E 16 a 44 ti r:._ �2 2. � �� 1 1 23 9 �/ Idirt j T : oi:Iriii 1 30 29 c8 26 30 � 2 I �F •� 26 1. •8 f _ - - I z �Ait 3kn 32 \ immi 3 1 I 75N ` �� I/t_ .� �IVfiII � T N �'-�� 74N / T4N� r I g: / ' Y7 t - �/��/ J' / / ,li / // �1 �,.I 1 AI !//// / � � / / / ( I II /mo / /,' NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0023060 Town of Mead Permit Expires: 07/31/04 Description of Treatment Facilities: Aerated lagoon and polishing pond. Discharge Location: 2 mile east of Mead in the S %of Section 10, T3N, R68W to an unnamed tributary of Lake Thomas and St. Vrain Creek. Stream Segment Classification: Class 2 Warm Water Aquatic Life, Class 1 Recreation, Agriculture. Service Area Population: Existing 2005 2010 2015 2,020 2,600 9,290 13,330 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 0.14 0.08 2002 2013 Organic(Ibs./day BODE) 333 169 2002 2003 Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: A master wastewater utility plan feasibility study is currently being prepared, looking at options of building a mechanical plant or conveyance of wastewater to the Saint Vrain Sanitation District for treatment. 1106 r __ ) 1 1 1 1 ) 1 1 1 1 1 1 1 I 1 1 I 1 1 1 1 1 ) 1 1 ) 1 1 1 1 1 1 1 1 1 ) ) 1 • 30 29 2. silllll / �� : ��IIIIII�► --- • 3 31 32 33.x•• 34 "5 J , 31 32 3? rP,3f T7 . ..�Ii 7.N 4 _• - ! TIN P>i Boulder 7 3 a /7 -v T3N ic cn co 6 5 4 fiF \D *NN6 5 ;? 112 N. j I �� • r\�—�� \ II 12 I 8 . Pik I / 7; \ ,/, �� '2,•�— - ' � CE�� I i MEAD �� • r_..I Mead t/ s— F2. Berthoud _O_ �/ r--�' FT Johnstown Q y Po zb PSi. Ti St. Vrain 5. D. o i o z.o • w ' • miles ,=,m NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0026808 Town of Milliken Permit Expired: 07/31/00-extended Description of Treatment Facilities: 2 aerated lagoons, finishing pond, chlorination, dechlorination. Discharge Location: Segment 5 of the Big Thompson River in the SEX of SEX of Section 1, T4N, R67W. Stream Segment Classification: Class 2 Warm Water Aquatic Life, Class 2 Recreation, Agriculture. Service Area Population: Existing 2005 2010 2015 2,760 4,697 6,247 8,000 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 0.35 0.18 2000 2002 Organic(lbs./day BOD5) 570 279 2001 2003 Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: A plant expansion to 0.70 mgd is planned for 2001 - 2002. A new polishing pond, a new chlorination basin, and additional aeration are proposed; and Cell — No. 1 will be divided into two cells. .- 1 108 A r I / I ` - 1 j r r — J ' _.------7N C 1 fie__ __ _ _ _ _ i 16 15 S ,t 18 I ' H -"\E\\‘‘ - - - SI \\\,6\aiki \ Ng c8 27 26 25 30 21 � 28. 5 \ 2'4 1 11 N� i} 32 Z 14 35 36 3 �3J� 34, E T 4 ND CC CC X 5 2 w 3 1 6 � I 4 ty _f„ 1, lilll, g A ' 10 11 12 7 9 10 t lTz:#} uj\/ 18 17 16 IS I f A d 2i 3 23 24 19 20 21 22 / / 7 r�` /; 27 / 30 29 /; 27 r 32 33 3 35 36 3 32dith 33 34 S i_ ! Milliken Hill -N-('ark MILLIKEN S. G . Gi(crest !._! Johnstown -°-0 1.0 2.0 I _l! Greeley m I iles 12-3-01 NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency NPDES Permit ft: CO-0036757 City of Northglenn Permit Expires: 01/31iO2 Description of Treatment Facilities: Aerated lagoons in series with effluent holding reservoir. Discharge Location: Bull Canal, Big Dry Creek or Thompson Ditch. Stream Segment Classification: Big Dry Creek- Class 2 Wane Water Aquatic Life, Recreation Class 2, Agriculture. No classification on others. Service Area Population: Existing 2005 2010 2015 33,350 38,749 41,100 41,100 Capacities: Design Existing Year at 80% Year at 95% Capacity Load * Design De Flow(MGD) 6.5 3.92 >2005 >2010 Organic (Ibs./day BOD5) 11,384 6,684 >2005 >2010 *Includes Thornton enclaves currently served Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: Nitrification facilities to meet stream standards. A treatment alternatives analysis is being done to determine the best course of action. 1110 ) s 1 ) ) ) ) 1 .1 ) 1 s ) 1 1 ) ) ) ) ) 1 ) ) ) 1 1 ) ) ) ) 1 ) ) 1 ) 1 ) ', i I 1 ) i — i I" % i 17 / � 16 / i %L. IP / I I IIPTI- � I h , li I Till HI II • I I I l I �f I I/I"'1. Ill I / to / \ i \ . TE, 22 NORTHGLENN �, I l vII /ill Northglenn `. J • s ' Broomfield , C _„,,,/ I L bacono 5. D. / 'i� s i�_, 5 26 4 2 4 -,:1-7/ 5t Vrain 5. b. ( � Si IllWeld County i` !):.-- i f_I . 0 0.5 1.0 Adams County I miles ,y}0, NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-O041211 Town of Pierce Permit Expired: 12/31/03 Description of Treatment Facilities: Triangular shaped stabilization pond. This pond is divided into cells by a submerged dike; the north cell has one floating 5HP aerator, the south cell is unaerated;chlorination capability. Discharge Location: To ground water in the SW 34 of NW 34 of Section 36, T8N, R66W. Stream Segment Classification: N/A Service Area Population: Existing 2005 2010 2015 900 1,000 1,050 1,100 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 0.18 0.095 2004 >2015 Organic (lbs./day BOD5) 361 200 2005 >2015 Effluent limits required beyond secondary to meet stream standards: N/A ^ Estimated 5-year construction needs: Two new monitoring wells, one upgradient and one downgradient. A chlorine contact pond will be built between the chlorine contact point and — sedimentation ponds by 2005. 1 112 aL \ \\ "a / j I H, I , \ � 7 I aC ) PIERCE �� i Pierce i'^ \ 0 0.2 0.4 i T8N miles 12-3-01 NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-O040355 Town of Platteville Permit Expires: 07/31/06 Description of Treatment Facilities: Aerated lagoons &chlorination discharged to S. Platte via 4,700 foot outfall line, constructed we Hand. Discharge Location: South Platte River, north side of Weld County Road 32 in the SE Yr, NE% Section 13, T3N, R67W. Stream Segment Classification: Class 2 Recreation, Class 2 Wane Water Aquatic Life, Agriculture. a' Service Area Population: Existing 2005 2010 2015 Z370 4,557 6,307 6,807 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 024 0.19 >2003 2004 Organic (lbs./day BOD5) 494 423 >2001 2002 Effluent limits required beyond secondary to meet stream standards: None a' Estimated 5-year construction needs: Removal of biosolids from lagoon #2 and additional disinfection capability. The plant will need expansion or a new plant will be needed in the next three to five years. a' a' a' 1 114 ,..... / T3Nit 3 3 I x -- ---\. l" .C) 1 � I ( ) r r. 13 - 1 j 17 ir 24 ` 1 � i `� 20 /' = A\ PLATTEVILLE I I Platteville 3 z 0 0.3 Oh miles I12.3.03 r NFRWQPA 2001 WATER QUALITY PLAN UPDATE Maior Point Source Inventory Data Operating Agency: NPDES Permit#: COG-581009 Town of Severance Permit Expires: 04/30/99-extended -- Description of Treatment Facilities: Aerated ponds followed by a stabilization pond followed by chlorination. Discharge Location: Law Ditch. Stream Segment Classification: Unclassified. Service Area Population: Existing 2005 2010 2015 600 1,190 2,565 3,430 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) .094 0.044 2004 2005 ^ Organic (lbs./day BODS) 157 93 2003 2004 Effluent limits required beyond secondary to meet stream standards: None Estimated 5-year construction needs: The Town of Severance is contemplating the construction of a sanitary sewer interceptor to connect to VYndsor's collection and treatment facilities. 1 116 l0'£21SZI Iw I 9L'0 9L£'0 0 J0S U1 M 172-11, aaunJanaS 1_ _I 3Nd213ABS Et l pt ` x A ,..... z i_______ .., _-___----1 , ....... , i , , ,,,, .... .. 2 I_--------i t� 0 I .. v / / I oP% ITN N91( Clb I %' NL / 1i / % i ��` I. NFRWQPA 2001 WATER QUALITY PLAN UPDATE Maior Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0020737 South Fort Collins Sanitation District Permit Expired: 12/31/05 Description of Treatment Facilities: Activated sludge, clarification, filtration, chlorination, and aerobic digestion. Discharge Location: Fossil Creek Reservoir in the SE '. of Section 17, T6N, R68W. Stream Segment Classification: Class 2 Warm Water Aquatic Life, Class 1 Recreation, Agriculture. Fossil Creek Reservoir is unclassified. Service Area Population: Existing 2005 2010 2015 16,828 26,249 36,028 45,628 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 3.0 1.92 2003-04 2006 Organic (lbs./day BODO 6,255 4,000 Effluent limits required beyond secondary to meet stream standards: None at present. It is anticipated that ammonia and phosphorus limits will eventually be placed on Fossil Creek Reservoir. District planning has allowed for this eventuality. Estimated 5-year construction needs: Design for an expansion will need to be started in 2003-4 to meet expected capacity. The 2000 Master Plan calls for a Phase 1 -3.0 MGD expansion to a total capacity of 6.0 MGD by the year 2006. 1118 )lir29 1 28 <E l _ c9 23 sk;4gtri,ardI: MS I11) A 'll --- N I NON' l'J3 35 .�-- 2lb' �T7NI1IIIII11%i1NISEEIt—........7„ N ��, . t . -,, IN ID '.41riaalliNIMIlle '1 . _ ))\ -- IL c/17----P-\---\ as el ll,lkHNII%iarIIIN S I CI .9IIIIIIIIR L IL I I ! Toit.- Ir J/ r. V 17 : 16 15 I 14 kb: l h, \ • k r,. ..u./ \ __, irl\ i \ \ it „,, ____. ... , ., , ,,,, /NHL , \ ,,,..., , , ,, __.,, , _ __„,/ --„,„ ._ , F, \ , ,,,,,, 20 ....2i.r. •�� .a..1im..�.• % 23 - 24 19 21 2 - ) �� I _ . - SOUTH FORT ' COLLINS S. b. 29 - `2 G. J 25 30c 2 2 - .i 5. Fort ) a y _ _.._ Collins 5. D. . .4 r (N- �. i� s+ 4 5 l Boxelder 5. D. � �� 1 I i IIll ! Fort Collins v �'� —��--7,_ f T6N II T5N IF/ �.)-I ...,r. N, I �� .) I 1 _®_ eN Windsor rt f -+-- xlce �-- f - 0 1.0 2.0 I .•,. .w d { A,y=. I I v miles 12ao, ' 1 NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0041700 St. Vrain Sanitation District Permit Expires: 01/31/V3 Description of Treatment Facilities: Four sealed oxidation ponds, one with diffused air and mixer, 2 with surface aerators, one for polishing, chlorination and dechlorination. The plant is currently being converted to a mechanical system. It includes headworks trash removal, two 1.5 MGD extended aeration lagoon and clarifier modules, Ultra-violet disinfection, and solids storage and handling facility. A third 1.5 MGD extended aeration and lagoon module is permitted. Discharge Location: To Oxbow Lake then to St. Vrain Creek; NW Y•, SE Y. of Section 31, T3N, R67Wof the 6th P.M. Stream Segment Classification: Class 1 Warm Water Aquatic Life, Class 2 Recreation, Agriculture. Service Area Equivalent Existing 2005 2010 2015 Population: 5,678 13,250 19,950 26,650 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD 0.5 0.47 2000 2000 Organic(Ibs./day BODO 1,002 850 2000 2001 Effluent limits required beyond secondary to meet stream standards: Total Ammonia (as N), varies monthly. Estimated 5-year construction needs: Interceptor on north side of St. Vrain Creek with trunk line to State Highway 66 and 1-25 completed in 2000 development Puritan and Idaho Creek major trunk line extension are under construction. Four additional trunk line extensions and fine parallel to the Godding Hollow trunk my well be constructed over the next five years. I -120 r , .a - T J J J 1 r J J D 1 1 J I i I J J f J J I �J I I I f J �.IJ f J 1 1' f .I f I i 1 f 11 i / f I L 0. fi. .F 1 1 f 1I 1 f 1 IP 1 1 1 1 J f f f 17 f li I? -- B /),� 15 la � ( � f �-rT��J ��- Ili / I t I n d A..r, s I r , r, .� J �: T ,�1 I T 1 _ / s 1 A II , �2�. )� 2+� 22 2J r f f1T � 1 d3 if �' ,. `, f I [CH 1 r cs� i ti ' ll�..� / 3o z9 7. P z6 25 JO 29 8 2] ) ll.\); (Illl tliJ3 3a 45 III �• .5• X- /32 33 ]a \ 15 4.2 1L' 41 4 ' - �/ 5 70. _ 2 6 n- - l ' 3 .J 2 til" �� /I: ..r _ asst .. a to 1I: ? e ��9.2— to ti IB I? 16 IS_ la 13 .— 1) 616 15 la =� 1I fNN 9 7-2r22 [ N' ''1' ^ 20 21 22 23 I • l PI i 1 . ...i... 26 ^^-3a" 29 e 2� 26 f _J__i_4111_ .—L— — ; = M v I / / ]1 l2^ Icr' c---- _�' _.- _._-. ice- `� �f'/ c I 14 is 2�. ir ��3. 35� 044 ;1 .1. LII \ � S 1—][ 2 I el \,... 4 1 i t ii I} .7-- lr W -a S' - / \ i. _ I11 I -�� < �� e T, g.'� � a 1e f{ — 9 Io II - — -` —L 1 - 11 / — — / -1 /r - r. -.—�� T / —� f u — 'Y - t / 3,/ IL 7/ / la P 1� }22 IS 15 _..14 � I i i , F rs 4 7 OP. 4 • ;t 1 vp z3 < I 26 > f r a1 21 � I T i / I I \ I I I _t__ Ix—.11\ I , �� 1I i; _ T 7 -7-L /I L 1 T I Tv� I # L;:: 1 32 , I (1 7777 • + 3 L .T � T- 44 1 St. Vrain 5. D. Longmont ST. VRAIN S. b . �% Broomfield u�' f { Mead ;:--_ ! Dacono Northglenn 0 1.0 2.0 -°- I r i i 1 Weld Countyp Tri Area 5. D. miles 12-3-01 NFRWQPA 2001 WATER QUALITY PLAN UPDATE ` Maior Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0031844 Upper Thompson Sanitation District Permit Expired: 02/281)1 -extended Description of Treatment Facilities: Activated sludge, secondary clarification, nitrification, filtration, chlorination, dechlorination, and sludge digestion. Discharge Location: Big Thompson River, Segment 2, NE % Section 29, T5N, R72W. Stream Segment Classification: Class 1 Cold Water Aquatic Life, Class 2 Recreation, Agriculture, Water Supply. Service Area Population: 2001 2005 2010 2015 13,350 18,750 25,500 30,000 Peak Flow Proiection 1.6 1.8 2.3 3.0 (MGM Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGD) 2.0 1.2 2005 2010 Organic(lbs./day BODS) 2,680 1,858 2005 2010 Effluent limits required beyond secondary to meet stream standards: The permit issued on 11/29/95 contained ammonia and metals limitations. The District has not received a new permit as yet. Estimated 5-year construction needs: Increase plant capacity as needed for growth. A site application to increase to plant capacity to 3.0 mgd has been approved. Another centrifuge will be installed in 2002. 1122 F -_ - - - _ - - - - - T7N 3 3 M N N n \\ K K 4 3 1 G 5- 4 3 �_ -' tea.-S..-.�...•�-..�.1 - .-/ 9 10 11 12 7 R 7 9 10 55. 4---- UT...1 1f 0J..�..�. �.. ..af3a.. I •• • 112, 17 16 15 • --- • • - ----=----_ T _- - 21 1 22 23 �� i 20 • 21 22 f • 29 28 27 25 1`O O 30 29 28 27 l,, s _l- . z // ---- 32 3piLierm\,,3 • • •• • (... • I34 35 3' W 31 • 32 33 34 1 _ 1 —_� TS \ T M n rt .. 4 3 2 1 6 1 r 4 g / 9 10 l � ..mom.. ..—.... II 12 7 8 I 9 6. . ails 1 20 21 22 23 24 19 20 21 UPPER THOMPSON S. D. 29 28 Y r..... Upper Thompson S. D. - Q 71 f T% Estes Park 5 . D . o i.o Z.o • 32 33 \ miles 12/3-01 NFRWQPA 2001 WATER QUALITY PLAN UPDATE Major Point Source Inventory Data Operating Agency: NPDES Permit#: CO-0021580 Weld County Tri-Area Sanitation District Permit Expires: 1131/O6 Description of Treatment Facilities: Aerated ponds, chlorination. Discharge Location: SW 3.of the NW'/.of Section 19, T2N, R67W, north of Firestone, Colorado. Stream Segment Classification: To St. Vrain Creek via a unnamed tributary. Service Area Population: Existing 2005 2010 2015 7,336 8,738 10,430 12,473 Capacities: Design Existing Year at 80% Year at 95% Capacity Load Design Design Flow(MGDI 1.5 0.80 2008 2010 Organic(lbs./day BODO 1,659 1,241 2002 2006 Effluent limits required beyond secondary to meet stream standards: None. Estimated 5-year construction needs: Make improvements to the collection system by installation of an interceptor sewer to accommodate proposed developments in the eastern portion of the District and the southern portion of the Dacono Sanitation District. Also, the district is completing an update of their Master Plan which proposes to upgrade their existing WWTP lagoons to include a Biolac system, clarifiers, biosolids storage, headworks improvement, and improved disinfection. The new plant would have a capacity of 3.0 mgd, construction would begin in 2005, and the cost is estimated at$8m+. 1 124 Hello