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1 This is a digital document from the collections of the Wyoming Water Resources Data System (WRDS) Library. For additional information about this document and the document conversion process, please contact WRDS at wrds@uwyo.edu and include the phrase Digital Documents in your subject heading. To view other documents please visit the WRDS Library online at: Mailing Address: Water Resources Data System University of Wyoming, Dept E University Avenue Laramie, WY Physical Address: Wyoming Hall, Room 249 University of Wyoming Laramie, WY Phone: (307) Fax: (307) Funding for WRDS and the creation of this electronic document was provided by the Wyoming Water Development Commission (

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3 CODY MASTER PLAN LEVEL I STUDY EXECUTIVE SUMMARY FUNDED BY: Wyoming Water Development Commission COMMISSIONERS: DIRECTOR: William Bensel Dan S. Budd Floyd Canfield Mitchel Cottenoir Dick Geving Shawn Hall Anne MacKinnon William Resor Kent Shurtleff James M. Wilson Michael K. Purcell, PE SPONSOR: City of Cody, Wyoming CONSULTANT: Engineering Associates Consulting Engineers and Land Surveyors P.O. Box th Street Cody, Wyoming (307) Fax (307) DATE: September 2009 JOB NUMBER: 08085

4 CODY MASTER PLAN, LEVEL I STUDY EXECUTIVE SUMMARY TABLE OF CONTENTS Scope of Study... 1 General System Information... 1 Population Forecast... 2 Water Demands... 2 Analysis of Existing Facilities and Recommended Improvements... 2 Fire Flow Review... 2 Review of Storage Needs... 3 Transmission and Distribution System Improvements... 3 Fire Flow Areas and 4 Diameter Pipe Replacement... 3 North Cody Industrial Area Improvements... 5 West Strip Pressure Improvements... 6 Beacon Hill Storage Tank Improvements... 7 Annexation Areas... 8 Annexation Area 1 North Cody Industrial... 9 Annexation Area 2 Cooper Lane Commercial... 9 Annexation Area 3 Beacon Hill Commercial... 9 Annexation Area 4 Panorama View Residential... 9 Annexation Area 5 Valley View Residential... 9 Annexation Area 6 West Strip Commercial... 9 Annexation Area 7 South Cody Industrial Review of Existing Rate Structure, Budget & Funding Non-Structural Improvements Summary... 10

5 CODY MASTER PLAN - LEVEL I STUDY EXECUTIVE SUMMARY Note: All table references are numbered the same as the Final Report for ease of reference between the two reports. SCOPE OF STUDY The goals of this study include the preparation of a GIS system meeting both WWDC and Cody software requirements, population projections, water demand analysis, and hydraulic modeling. From all of this research, issues and concerns with the City s treated water system will be determined, and improvements to the system will be recommended. The City s current rate schedule and water budget will be reviewed, and estimates for the improvements will be developed with appropriate rate increases to pay for those projects. In addition, expansion and/or annexation of surrounding areas will be analyzed. Those areas include: North Cody Industrial Area West Strip Expansion Cooper Lane Commercial Area Beacon Hill Commercial Area South Cody Industrial Area Valley View Residential Area Panorama View Residential Area near Golf Course GENERAL SYSTEM INFORMATION Water for the City of Cody s treated water system is supplied by the Shoshone Municipal Pipeline (SMP). The SMP also provides water to the eight service areas of Northwest Rural Water District, and the communities of Powell, Byron, Lovell, Deaver, and Frannie. The City has two connection points to the SMP system - one located in Valley View and another near the old water treatment plant at Markham Reservoir. Water quality from the SMP is excellent. The City has over 70 miles of treated water lines, 10 pressure reducing valve (PRV) stations, and 2.2 million gallons of storage. The tanks are monitored by a telemetry system, but the PRVs are not. These PRVs are required due to the City s three tiers, each having an elevation difference from 80 to 100 vertical feet. In addition, the City has over 35 miles of raw water lines, with 840,000 gallons of storage and two pump stations delivering over 8,000 gpm of raw water to users during the summer months. This report covers only the analysis of the City s treated water system. However, some assumptions must be made about the raw water system. For the purposes of this report, it is assumed that the raw water system will remain in operation to its current service area with no future expansion. Continued operation of the City s existing raw water system is imperative, even if expansion of the system is not considered. The systems are separate, but sizing of the treated water system is dependent in part on the raw water system, and the raw water system provides 75% of the landscape watering 1

6 demand during its five months of operation. Currently, the City s treated water system use per year is about 535 million gallons and the raw water system use is about 700 million gallons in just five months. This documents the definite need for both systems to remain operational. POPULATION FORECAST Given Cody s past growth history, and the trend of building permits over the last years, a population projection of 1.3% annually was established. The last census estimate in 2006 was used as the base population figure and projected forward to 2009 and to Table 2.1 Population Projections Year Population Description ,216 Census Estimate ,581 Base Year ,405 Future Year 20 years WATER DEMANDS Records from the City and SMP were analyzed to determine 2009 demands, which are listed below. Average Day Demand (ADD) 1.47 MGD 1,020 gpm Maximum Day Demand (MDD) 3.09 MGD 2,142 gpm Peak Hour Demand (PkHr) 4.41 MGD 3,060 gpm Maximum Day Demand = 2.1 Peak Hour Demand = 3.0 Average Day Demand Average Day Demand Interestingly enough, the average day usage for the City is nearly identical to the usage from the study completed in At that time, the City had an unaccounted for water percentage of almost 23%. The City s current estimate of unaccounted for water is 12 to 15%, so they have done a good job reducing the unaccounted for water use, while its customers have been prudent with water conservation efforts. The total population increase of Cody since the 1996 study is at least 1,000 people. ANALYSIS OF EXISTING FACILITIES AND RECOMMENDED IMPROVEMENTS FIRE FLOW REVIEW After establishing fire flow amounts and duration with input from Russ Wenke, Park County Fire Marshall, several simulated fire flow demands were conducted in various areas of the City. Those areas are shown on Exhibit 3.1 in the Final Report, but generally include areas where there are only 4 diameter lines, the West Strip, and areas near the Airport. The fire flow to these areas can be improved with several of the projects listed below. 2

7 REVIEW OF STORAGE NEEDS There are four general types of storage considered when calculating storage requirements. Those include: operational, fire, reserve, and bottom. The City currently has a 2 million gallon tank above Beck Lake, a 200,000 gallon tank near Valley View, and will be constructing a 592,000 gallon tank in North Cody. This is a combined total of MG. The table below represents the amount of the storage the City should have today and in Table 5.2 City of Cody Water Storage Requirements Year Operational Storage (MG) Reserve Storage (MG) Fire Storage (MG) Bottom Storage (MG) Total Storage (MG) 2009 Current Storage (including North Cody proposed tank) The City is currently MG short of storage needs. By 2029, the City will be MG short. It is recommended that the City construct an additional storage tank near Beacon Hill Road on the eastern side of the City. This will assist with fire flows in that area, and will allow the City to have back up storage to take their 2 MG tank off-line for maintenance. As the system currently exists, the 2 MG tank can not be taken off-line for service without the City s system floating off of SMP. It is important to note that while the North Cody Tank is considered in the overall volume, it cannot contribute to any areas other than the North Cody area. In a dire emergency, water could be hauled from the North Cody Tank to one of the other tanks, but since water is pumped to that tank under the Shoshone River, it is not possible for the water to return back to the City s water system. TRANSMISSION AND DISTRIBUTION SYSTEM IMPROVEMENTS Generally speaking, the City s existing water system is in relatively good working condition. Many of the bottlenecks and 4 pipes outlined in the 1996 Study have been corrected and replaced. While examining the City s system, the following problems were noted: 1. Areas of inadequate fire flows based on City zoning and fire flow criteria. 2. Lack of storage (see previous section). 3. Low pressures along the West Strip/Yellowstone Highway. 4. Several 4-inch diameter pipes causing bottlenecks to system flows. Fire Flow Areas and 4 Diameter Pipe Replacement These two items have been combined since replacement of any 4 water lines will improve fire flows to those areas. Based on the zoning and land use throughout the 3

8 City, fire flow analyses were completed to determine where low flows might exist. Exhibit 3.1 shows the areas throughout the City where flows were inadequate. For those areas without a passing flow, we have recommended improvements in Table 5.4. DEQ regulations require that 6 diameter lines be looped or that dead-end lines with a fire hydrant on the end must be a minimum of 8 diameter. Other areas are suggested to be improved as outlined in Table 6.18 below in five year increments. Table 6.18 Estimated Construction Costs for 4-Inch Pipe Replacements and Fire Flow Upgrades LOCATION YEAR REPLACE- MENT PIPE QTY UNIT COST PER UNIT INFLATION FACTOR TOTAL ESTIMATED COST BERDAHL AVE/JENNI LN " PVC 700 LF $ $87,500 TRESSLER AVE/SARAH LN " PVC 600 LF $ $75,000 RUMSEY - 19TH TO DEAD END " PVC 600 LF $ $75,000 8TH ST - CODY TO BECK " PVC 800 LF $ $100,000 SHERIDAN - BB TO 8TH " PVC 850 LF $ $106,250 SUBTOTAL 2010 TO 2014 $443,750 SUNSET BLVD N & S " PVC 1,900 LF $ $240,350 MONUMENT ST - SUNSET TO BB " PVC 1,075 LF $ $154,531 14TH ST - ALGER TO BECK " PVC 400 LF $ $57,500 MEADOW LANE W/O 14TH " PVC 800 LF $ $156,000 17TH ST - MCDONALDS " PVC 250 LF $ $40,625 SUBTOTAL 2015 TO 2019 $649,006 STAMPEDE - 14TH TO 15TH " PVC 200 LF $ $39,000 STAMPEDE - 15TH TO ALLEY " PVC 100 LF $ $16,250 16TH ST - STAMPEDE TO PARK " PVC 800 LF $ $130,000 ALBERTSONS PARKING LOT " PVC 100 LF $ $14,300 MEADOW LANE W/O 14TH " PVC 800 LF $ $156,000 CIRCLE DRIVE & 19TH " PVC 2,400 LF $ $343,200 SUBTOTAL 2020 TO 2024 $698,750 31ST & 32ND " PVC 2,500 LF $ $412,500 32ND N/O EAST CARTER " PVC 350 LF $ $65,625 ALLEY IN SUBD 79A " PVC 400 LF $ $75,000 SUBTOTAL 2025 TO 2029 $553,125 4

9 North Cody Industrial Area Improvements This area has recently been annexed to the City as has obtained funding from the Wyoming Business Council for water and sewer improvements. The design is complete, DEQ permit has been obtained and the project is ready to bid pending some final easement negotiations. As shown above in the Storage section, this tank will help the City to gain on its lack of adequate storage for the system. A copy of the estimated construction costs are included in Appendix E. Table 6.6 outlines proposed costs. Table 6.6 Estimated Costs - North Cody Tank Improvements PROJECT FEATURE TOTAL ESTIMATED COST TOTAL COSTS - SEE BID SCHEDULE APPENDIX E $895,850 CONSTRUCTION COST SUBTOTAL NO. 1 $895,850 CONSTRUCTION PHASE ENGINEERING 10.0% $89,585 CONSTRUCTION COST SUBTOTAL NO. 2 $985,435 CONTINGENCY 15.0% $147,815 CONSTRUCTION COST TOTAL $1,133,250 FINAL DESIGN, SPECS, PERMITTING, LEGAL, ROW * 0.0% $0 TOTAL PROJECT COST $1,133,250 PROJECT SPONSOR FUNDING 33% $373,973 WWDC FUNDING 67% $759,278 * All of these items are complete and were paid for under separate contract. West Strip Pressure Improvements The main area of the City that is suffering from low pressures is the West Strip (or Yellowstone Highway), where pressures range from 52 psi to 68 psi under current ADD conditions. Some private spur lines to hotels may have pressures as low as 35 psi. Fire flows in this area also are not even close to the 4,000 gpm commercial demand, although most new construction is sprinkled for fire protection. The pressure needed in this area to improve day to day pressures and increase fire flows is very close the HGL provided for Pressure Zone 1 on the upper bench. Currently, the West Strip is fed from the upper bench through one or more PRVs in the area. If PRVs were removed or relocated, this increases pressures to around 75 to 85 psi, and corrects the fire flow issues for most of the area. The following improvements are needed to correct this situation, which are shown on Exhibit 5.1. Table 5.5 shows the improvements in fire flows and Table 6.7 outlines proposed costs. 5

10 Table 5.5 West Strip Fire Flow Improvements Junction Number & Fire Flows (gpm) General Location Existing PRV Improvements Parallel Line J3057 The Terrace J3025 Wyoming Sprinkler 785 1,124 1,615 J3085 Cody Inn 989 1,402 3,381 J3120 Super Walmart 1,992 3,229 4,000 J3500 Gulch Street 1,971 3,152 3,998 J3051 Bubba s 1,947 3,074 3,856 J3505 Discount Appliance 2,020 3,303 4,000 Table 6.7 Estimated Costs - West Strip Pressure Improvements COST PROJECT FEATURE UNIT QUANTITY PER UNIT TOTAL ESTIMATED COST 6" PVC P LF $58 $2,900 12" PVC P LF $80 $72,000 PAVEMENT RESTORATION 50 LF $65 $3,250 SURFACE RESTORATION 900 LF $35 $31,500 PRV STATION #11 1 EA $85,000 $85,000 REMOVE PRV STATION 1 EA $15,000 $15,000 10" PVC 3100 LF $70 $217,000 PAVEMENT RESTORATION 100 LF $65 $6,500 SURFACE RESTORATION 3000 LF $35 $105,000 CONSTRUCTION COST SUBTOTAL NO. 1 $538,150 CONSTRUCTION PHASE ENGINEERING 10.0% $53,815 CONSTRUCTION COST SUBTOTAL NO. 2 $591,965 CONTINGENCY 15.0% $88,795 CONSTRUCTION COST TOTAL $680,760 FINAL DESIGN & SPECIFICATIONS 10.0% $68,076 PERMITTING AND MITIGATION 3.0% $20,423 LEGAL FEES 2.0% $13,615 ACCESS AND RIGHTS-OF-WAY 3.0% $20,423 TOTAL PROJECT COST (PRESENT COST) $803,297 TOTAL PROJECT COST (FUTURE COST) $852,218 PROJECT SPONSOR FUNDING 33% $281,232 ADDITIONAL FUNDING REQUIRED (WWDC) 67% $570,986 ESTIMATED YEAR OF CONSTRUCTION: 2011 INFLATION 3% 6

11 Beacon Hill Storage Tank Improvements As noted above in the section on Storage, the City is lacking in their storage requirements. To correct this issue, a proposed 1 MG storage tank would increase the City s capacity. The estimated size for this tank is 92 diameter by 20 high is proposed on Beacon Hill east of the Airport. This tank would be filled off a new connection to the SMP pipeline near the northeast end of the Airport runway. The City may wish to consider a tank size of 2 MG (instead of a 1 MG) for this site so that the existing 2 MG tank could be taken off-line and serviced when needed (and vice versa). While the current tank inspection reports for the 2 MG tank do not require interior coating, this will need to be accomplished sometime within the next 10 years. The improvements needed are shown on Exhibit 5.2. Table 5.6 shows the improvements in fire flows and Table 6.8 outlines proposed costs. Table 5.6 Beacon Hill Storage Tank - Fire Flow Improvements Fire Flows (gpm) Junction Number & Tank, Tank, P10003, Tank & General Location Existing P10003 & P10006 & P10003 P10009 * P10009 J7065 Mountain View & 26 th 2,436 4,000 4,000 4,000 J7585 National Guard 1,419 2,389 2,397 2,488 J7265 New Airport Terminal 1,323 3,153 3,161 3,412 J7125 WYDOT Building ,788 3,901 J7530 Sheridan & 35 th ST 1,664 2,946 2,949 3,029 * Proposed alternative Table 6.8 Estimated Costs - Beacon Hill Storage Tank Improvements Option 1 PROJECT FEATURE UNIT QUANTITY COST PER UNIT TOTAL ESTIMATED COST 10" PVC P LF $70 $84,000 10" PVC P LF $70 $26,250 12" PVC P LF $80 $174,400 PAVEMENT RESTORATION 500 LF $65 $32,500 SURFACE RESTORATION 3255 LF $35 $113,925 TANK YARD PIPING 1 LS $15,000 $15,000 1 MG CONCRETE TANK 1 LS $1,250,000 $1,250,000 TANK SITE PREP 1 LS $50,000 $50,000 SCADA CONTROLS 1 EA $125,000 $125,000 SMP CONNECTIONS 1 EA $95,000 $95,000 TANK ACCESS ROAD 1 LS $75,000 $75,000 CONSTRUCTION COST SUBTOTAL NO. 1 $2,041,075 CONSTRUCTION PHASE ENGINEERING 10.0% $204,108 7

12 CONSTRUCTION COST SUBTOTAL NO. 2 $2,245, % $336,777 CONSTRUCTION COST TOTAL $2,581,960 FINAL DESIGN & SPECIFICATIONS 10.0% $258,196 PERMITTING AND MITIGATION 3.0% $77,459 LEGAL FEES 2.0% $51,639 ACCESS AND RIGHTS-OF-WAY 3.0% $77,459 TOTAL PROJECT COST (PRESENT COST) $3,046,713 TOTAL PROJECT COST (FUTURE COST) $3,531,975 PROJECT SPONSOR FUNDING 33% $1,165,552 ADDITIONAL FUNDING REQUIRED (WWDC) 67% $2,366,424 ESTIMATED YEAR OF CONSTRUCTION: 2014 INFLATION 3% Generally, the 2009 prices for concrete tank construction (without site work, etc.) is about $1.25 per gallon. Therefore a 2 MG tank would be $2.5 million with some additional site work required. ANNEXATION AREAS: Part of the scope of this study included review of areas adjacent to the City of Cody to determine whether they could be served if development occurs in those areas. Each area was assigned a general assumed land use type. Pipe sizes were determined by fire flow demands at the end of each line extension to meet the lower new construction fire flow amounts. Some areas require other improvements to be constructed prior to being able to be served. Modeling runs with every annexation area on and the West Strip and Beacon Hill Storage Tank improvements (as well as fire flow or 4 pipe replacements) were completed for ADD, MDD, and Peak Hour and are included in the Project Notebook. There is adequate supply from SMP to serve all of these areas as assumed for this study. Table 5.7 shows each area and its assumed demands Annex Area Table 5.7 Annexation Area Demands & Fire Flow Requirements Land Use Category GPM/ acre Assumed Developed Acres GPM MG/Day Fire Flow Demand (gpm) Location 1 North Cody E ,500 2 Cooper Lane D ,500 3 Beacon Hill D ,500 Panorama 4 View A ,000 5 Valley View RR ,000 6 West Strip D ,500 7 South Cody E ,500 8

13 Annexation Area 1 North Cody Industrial The western side of this area is currently close to bidding and should be under construction later this year. An extension of this industrial area is proposed to the east. It is assumed that if this project were completed that the second MG tank would be installed. See Exhibit 5.3 in the Final Report. Annexation Area 2 Cooper Lane Commercial This area located north of the Powell Highway and east of West Cooper Lane is prime for commercial development along the highway. Pressures on this end of the City are typically over 100 psi, so water delivery is not a problem. See Exhibit 5.4. Annexation Area 3 Beacon Hill Commercial This area located south of the Powell Highway and east of Beacon Hill Road is also suitable for commercial development along the highway. Due to the elevations, this area must be served from the upper bench of the City. See Exhibit 5.5. Annexation Area 4 Panorama View Residential This area located east of the existing Panorama View subdivision south of the golf course. This area does include significant hills, but pressures were inadequate for any extensions to higher grades. If development is proposed at any significant elevations, pumping may be required. Large diameter pipe and looping was required to obtain the minimum 1,000 gpm fire flow for this area. See Exhibit 5.6 in the Final Report. Annexation Area 5 Valley View Residential Several recent residential subdivisions in this area have been annexed to the City. There is a large area of vacant land west of the Southfork Highway, but previous attempts to subdivide this area have been stalled due to poor soil conditions. If there is enough demand, certainly the soils problems might be able to be addressed by an interested developer. Looping this area back to the existing piping would also improve the slightly under-desired fire flows. See Exhibit 5.7 in the Final Report. Annexation Area 6 West Strip Commercial Recent development in this area keeps pushing further and further to the west. As discussed earlier, inadequate pressures and fire flows are likely to stall any new development requiring water service outside the City. This area extends to the pull off on the north side of the highway and encompasses the existing trail ride business. There is also minimal area for water line installation, and coordination with WYDOT for installation in their right-of-way could be required. These improvements also correct the remainder of the fire flow issues discussed in the West Strip Pressure Improvements project. See Exhibit 5.8 in the Final Report. 9

14 Annexation Area 7 South Cody Industrial Portions of this area now have water service from the Sage Creek service area of the Northwest Rural Water District since the inception of this study. However, there are numerous existing businesses in this area, so it has been included in this study for fire protection. The City s corporate limits do extend to this area currently, but do not include the specific area that has been subdivided where the businesses are located. Pressures in the area would be around 40 to 50 psi. See Exhibit 5.9. Costs are included for all annexation areas in the Final Report, but since they would like be development driven, those costs are not specifically discussed here. REVIEW OF EXISTING RATE STRUCTURE, BUDGET & FUNDING The review of their expenditures and revenues are consistent with our separate calculations, and the City s water department appears very solvent. Table 6.5 is a summary of various funding options available and associated requirements. NON-STRUCTURAL IMPROVEMENTS There are several other improvements the City should consider that do not involve construction. These are outlined below and discussed in more detail in the Final Report. Raw Water Study o System is Imperative for Treated Water System Operation o Determine Raw Water Lines in Need of Repair / Replacement o Request Level I WWDC Study PRV Setting Adjustments Hydraulic Model Maintenance o Compare City Fire Department Flow Tests with Model o Add New Construction Piping & Appurtenances o Review PRV Field Setting Adjustments Use Annexation Area Pipe Sizing to Review Future Development Utilize GIS System by Adding Information to Attribute Tables Review City Rate Schedule as New Capital Projects are Constructed Require Minimum Rate Payments (SMP & City Base Rates) for all Seasonal Disconnections ( Snowbirds ), including Time to Disconnect and Reconnect Meters Continue Leak Detection Studies Continue Tank Inspections Every 5 Years SUMMARY The City s treated water system is in relatively good condition, but continued upgrades and maintenance are needed to sustain the system. Once the North Cody improvements are complete, the City should consider construction of items needed to improve pressures and fire flows on the West Strip, add additional storage off Beacon Hill Road, and continue its annual replacement of 4-inch water lines. 10