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Mailing Address: Water Resources Data System

University of Wyoming, Dept 3943 1000 E University Avenue

Laramie, WY 82071

Physical Address: Wyoming Hall, Room 249 University of Wyoming

Laramie, WY 82071

Phone: (307) 766-6651 Fax: (307) 766-3785

Funding for WRDS and the creation of this electronic document was provided by the Wyoming Water Development Commission

(http://wwdc.state.wy.us)

Executive Summary

Hanna Water System Level II Study

A Wyoming Water Development Commission Project

WWDC Project No. 05SC0295412

October 2014

PPMMPPCC Saratoga, Wyoming

7014.390/October 31, 2014 i Executive Summary

TABLE OF CONTENTS TASK 1 – SCOPING AND PROJECT MEETINGS .................................................... 1

TASK 2 – REVIEW OF EXISTING INFORMATION ................................................ 3

TASK 3 – POPULATION GROWTH AND WATER DEMAND PROJECTIONS .... 3

TASK 4 – INVENTORY AND EVALUATION OF THE EXISTING SYSTEM ....... 3

TASK 5 – HYDRAULIC MODEL AND GIS .............................................................. 4

TASK 5a – SWING TIE ATTRIBUTION .................................................................... 4

TASK 6 – EVALUATION OF SYSTEM OPERATIONS ........................................... 4

TASK 7 – CONCEPTUAL DESIGNS AND COST APPROXIMATIONS ................ 5

TASK 8 – ENVIRONMENTAL REPORT ................................................................... 7

TASK 9 – IDENTIFICATION OF CONSTRAINTS ................................................... 7

TASK 10 – INPUT FROM LOCAL OFFICIALS ........................................................ 7

TASK 11 – SCHEDULE OF ACTIVITIES .................................................................. 8

TASK 12 – LIFE CYCLE COST ANALYSIS AND FINAL COST ESTIMATES ..... 8

TASK 13 – WATER SYSTEM FINANCING .............................................................. 8

FUNDING SCENARIOS ............................................................................................................. 9

LIST OF TABLES

Table 1 – Town Priorities and Tentative Project Schedules .......................................... 6

Table 2 – Funding Summary ........................................................................................ 10

TABLE OF FIGURES

Figure 1 – Project Area Location Map .......................................................................... 2

7014.390/October 31, 2014 1 Executive Summary

INTRODUCTION

Hanna is located in Carbon County, approximately 40 miles northeast of the City of

Rawlins. The Town’s population peaked in the early 1980s at approximately 2300

residents and now stands at 840, as of the 2010 census. The Town’s water system

includes a water treatment plant built in 1980 along with a 20 million gallon open

reservoir filled with surface water, collected from Rattlesnake Creek. The Town

distribution system has a variety of water main sizes and pipe material, from steel and

iron pipe installed in the 1920s to Asbestos Cement (AC), ductile iron (DIP) and

Polyvinyl Chloride (PVC) installed in the early 1980s1

This report is a Wyoming Water Development Commission (WWDC) Level II Report

that builds on the Master Plan Level I Study prepared by AVI Professional Corporation

and submitted in September of 2012 (Master Plan). In this report, general

recommendations and projects from the Master Plan are developed into specific

projects with cost approximations and potential funding sources identified. The goal of

this Level II study is to build on the Level I Study by developing recommended projects

through prioritization, identification of funding sources, project constraints and

preliminary project planning. The Projects identified for this study are shown in Figure

1 – Project Area Location Map.

This Level II study also reviews water system operations and updates the Level I study

with the most recent available information. In addition this study updated the

Geographical Information System (GIS) with a valve shape file and swing tie attribute

table. The Master Plan water model has been updated with revised demands, pressures

and an extended time period simulation. Fire flows have also been modeled and

verified in five different areas of the Town.

TASK 1 – SCOPING AND PROJECT MEETINGS

Project meetings were held at several milestones during the project. An initial scoping

meeting was held in Hanna on August 13, 2013 to familiarize the Town Council and

staff with the project scope and schedule. A second project meeting was held on June

30, 2014 in Hanna. The second project meeting was a combined meeting to present

growth and demand projections and conceptual project designs.

Upon completion of the report, a public meeting will be held to present the findings of

the report. All pertinent data will be presented at the meeting and a memorandum

summarizing the views and comments presented at the meeting will be prepared.

1 AVI Professional Corporation, Hanna Master Plan Level I Study, Final Report, September 2012

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Source: Esri, DigitalGlobe, GeoEye, i-cubed, USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS User Community

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PMPC 118 E. Bridge PO Box 370Saratoga, WY 82331P: 307-326-8301F: 307-326-8301

FIGURE

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LEGEND WATER MAINS

2 INCH4 INCH6 INCH8 INCH10 INCH12 INCHPROPOSED MAIN

PROJECT LOCATION DESCRIPTION

1 4TH ST. (EAST)2 4TH ST. (WEST)3 FRONT ST. (EAST)4 FRONT ST. (WEST)5 OLD TOWN (SOUTH)6 OLD TOWN (EAST)7 OLD TOWN (WEST)8 OLD TOWN9 OLD TOWN

10 SOUTH JEFFERSON11 SOUTH WEST12 SOUTH 3RD ST.13 WEST RR CROSSING14 SOUTH15 SOUTH EAST16 EAST

17A STATE HIGHWAY WEST17B STATE HIGHWAY EAST18 TANK LOOP (SOUTH)19 TANK LOOP (NORTH)20 TANK LOOP (EAST)21 TANK LOOP (SOUTH)22 TANK LOOP (WEST)23 NORTH JEFFERSON24 WEST ELMO25 3RD ST. AND EAST ST.26 5TH ST. ALLEY27 3RD ST. ALLEY28 2ND ST. ALLEY29 1ST ST. ALLEY

0 0.25 0.5 0.75 10.125Miles


TASK 2 – REVIEW OF EXISTING INFORMATION

To achieve a historical perspective and understanding for the current water system,

PMPC gathered and reviewed available information related to the Town’s water supply,

transmission and distribution.

PMPC has extensive files and as-built plans for the Town’s water system that were

reviewed for information to produce the swing tie tables and conceptual design detail,

such as water main sizing; and material and miscellaneous information, such as steel

casing locations and underground conditions. The as-built information was used to

create the conceptual designs and improve the accuracy of the cost approximations.

Additional financial reports, water treatment plant record and staff interviews were

collected from Town personnel.

TASK 3 – POPULATION GROWTH AND WATER

DEMAND PROJECTIONS

The recommendations of the Master Plan are still pertinent to the current growth and

demand projections, as population growth has been flat to negative and local industrial

development is still in the feasibility and planning stages–. The Hanna water system

has supported approximately 2,100 people in the past so there could be a substantial

increase in current population without requiring additional system capacity. Based on

the available data; population growth will not adversely impact overall water demand in

the foreseeable future. With minor repairs and improvements the water system can

support additional population.

TASK 4 – INVENTORY AND EVALUATION OF

THE EXISTING SYSTEM

The Hanna water system has supported approximately 2,100 people in the past so there

could be a substantial increase in current population without requiring additional

system capacity. With the exception of the top five priority areas identified in Task 7,

the Hanna Water system infrastructure has no known issues requiring immediate repair

or replacement.

The raw water reservoir, WTP and existing one million gallon storage tank are

acceptable for the current and projected demand. There are no pump stations in the

system. The PRV station maintains pressure throughout the Town. There are no

identified bottlenecks in the supply or distribution system that prevents the Town from

supplying water to customers.


TASK 5 – HYDRAULIC MODEL AND GIS

The hydraulic model developed for the 2012 Master Plan was reviewed and updated

with the most recent year of water production records provided by the Town and

calibrated by hydrant flow testing. Extended period simulations and fire flow scenarios

were also developed to assess the water system’s ability to service the Town. In

addition, a proposed looping water main to Elmo was modeled for impacts to fire flow

and water system function. To verify and calibrate the model, flow testing was

performed on five fire hydrants in Hanna.

The GIS provided with the 2012 Master Plan was reviewed and updated with a valve

shape file and swing tie attributes. Valve locations, along with many other components

of the water system, were digitally mapped with the use of ArcGIS. A unique shapefile

was created for the water valves. The valve locations were approximated from the

information given on the swing tie attribute table. Street intersections, valve size, and

field measurements were all utilized for placing the valve as correctly as possible.

When locations were still in question, aerial imagery was used in an attempt to locate

the valve. All valves were placed on the map with best information available.

TASK 5A – SWING TIE ATTRIBUTION

A swing tie is a method of locating equipment based on horizontal measurements to

fixed landmarks such as fire hydrants and power poles. Swing tie measurements are

usually made during the final phases of a construction project. A swing tie table, for

the valves in Hanna, was created and linked to the GIS. Existing maps were cross-

referenced to determine the location and size of pipe for the existing valves. From the

information gathered from the maps, a swing tie table was constructed to identify all of

the existing valves. Once completed, a field analysis was conducted to verify that the

valves and the landmarks utilized for the swing tie information were still present.

TASK 6 – EVALUATION OF SYSTEM

OPERATIONS

The operation of the system has not significantly changed since the 2012 Master Plan.

The two notable improvements to the system are the installation of the Supervisory

Control And Data Acquisition (SCADA) system proposed in the Master Plan and

repairing the existing pressure reducing valve system.


The SCADA system was installed and is currently operational. At this time it is

primarily used for observing the functions of the water treatment plant, and only

controls the ferric chloride process. The Town is considering expansion of the SCADA

system to obtain additional system data and is reviewing recommendations for

programming improvements to optimize utilization of the system and the efficiency of

the plant.

TASK 7 – CONCEPTUAL DESIGNS AND COST

APPROXIMATIONS

Conceptual level designs and cost estimates have been developed for the project areas

identified by extensive review of existing information and record documents. Plan

view drawings and tabulated cost approximations are presented in Appendix B of the

Level II Study Final Report.

The plan view drawings are suitably scaled and of sufficient detail to identify important

project parameters such as: valves, fittings, water service connections, cross connection

control and surface restoration. The drawings have been developed from information in

past reports and as-built drawings.

The cost estimates are the engineer’s opinion of probable construction cost and are

made on the basis of experience and qualifications. Tabulated cost approximations

have been prepared from the developed project plans and include design, permitting,

land acquisition, construction engineering, construction, and construction

contingencies, along with material quantities such as length of pipe, number of fitting

and connections, and road surface. The cost approximations presented in Table 1 are

based on the year this study is completed with recommended inflation factors for the

proposed construction schedule for those sections to be completed in the future. The

table also identifies Commission-eligible and non-eligible project costs.


Project Area

Non-Eligible

Main

Classification

Date

InstalledGeneral Comments

Schedule for

Replacement

(Year)

Estimated

Cost

1 4TH STREET EAST Distribution 1971 Primarily distribution. Glued joint PVC W/Joint failure. 1 $285,550

2 4TH STREET WEST Distribution 1971 No taps, primary looping line. Glued joint PVC W/Joint failure. 1 $167,265

3 FRONT STREET EAST Distribution 1980Minimal taps, carries significant fire flow for areas on west end of Old Town.

Metallic fitting corrosion and failure. 2$315,979

4 FRONT STREET WEST Distribution 1980Minimal taps, carries significant fire flow for areas on west end of Old Town.

Metallic fitting corrosion and failure. 2$163,399

5 OLD TOWN SOUTH Distribution UK Primarily distribution in the oldest part of town. 3 $336,659

6 OLD TOWN EAST Distribution UK Primarily distribution in the oldest part of town. 4 $416,732

7 OLD TOWN WEST Distribution UK Primarily distribution in the oldest part of town. 5 $242,188

8 OLD TOWN DISTRIBUTION Distribution UK Primarily distribution in the oldest part of town. 6 $447,062

12 SOUTH 3RD STREET Distribution 1981 Minimal taps, carries significant fire flow for areas on west end of Old Town 10 $453,737

18 SOUTH TANK LOOP Distribution NA New water main, primary loop from storage tank to Old Town 16 $363,710

25 EAST AVENUE Distribution 1980 Elmo north end distribution line, several taps. 20 $221,306

26 FIFTH STREET ALLEY Distribution 1980 Elmo distribution line, several taps. 20 $197,943

27 THIRD STREET ALLEY Distribution 1980 Elmo distribution line, several taps.20

$257,279

28 FIRST STREET ALLEY Distribution 1980 Elmo distribution line, several taps. 20 $370,988

29 ROSEBUD AVENUE Distribution 1981 Elmo distribution line, several taps. $267,094

Project Area

WWDC Eligible

Main

Classification

Date

InstalledGeneral Comments

Schedule for

Replacement

(Year)

Estimated

Cost

9 OLD TOWN TRANSMISSION Transmission UK Main Transmission from WTP to Tank.7

$733,815

10 SOUTH JEFFERSON Transmission UK No taps, primary line from supply to north side of town and to fill storage tank 8 $159,091

11 SOUTH WEST Transmission 1978 No taps, primary line from supply to north side of town and to fill storage tank 9 $358,859

13 WEST RR CROSSING Transmission 1981 No taps, primary line from supply to north side of town and to fill storage tank 11 $99,727

14 SOUTH Transmission 1981 No taps, primary line from supply to town and to fill storage tank 12 $500,645

15 SOUTH EAST Transmission 1981 No taps, primary line from supply to town and to fill storage tank 13 $546,576

16 EAST Transmission 1978 No taps, primary line from supply to town and to fill storage tank 14 $269,444

17 STATE HIGHWAY Transmission 1980 Minimal taps, primary line from supply to Elmo 15 $818,334

19 NORTH TANK LOOP Transmission NA New water main, primary loop from storage tank to Elmo 17 $387,561

20 TANK LOOP EAST Transmission 1980 No taps, primary line from storage tank to Jones Addition and Elmo 18 $218,949

21 TANK Transmission 1980 No taps, primary line from storage tank to entire system 19 $95,721

22 TANK LOOP WEST Transmission 1980 Minimal taps, primary line from storage tank to west and south sides of town 20 $436,741

23 NORTH JEFFERSON Transmission 1977 Primary line from supply to north side of town and to fill storage tank 20 $403,259

24 WEST ELMO Transmission 1980 Elmo west end transmission line, no taps. 20 $314,039

Table 1 – Town Priorities and Tentative Project Schedules


TASK 8 – ENVIRONMENTAL REPORT

For the Master Plan, an environmental report (ER) was produced by Western

EcoSystems Technology, Inc. for portions of the Town that were identified as needing

infrastructure improvements2.

The current list of priority areas to be investigated as identified in the Scope of Services

encompasses a larger area than what has been studied in the Master Plan ER. The

additional areas include Elmo, the Jones Addition and all areas south of the UPRR

tracks. To investigate these additional areas, applicable State and Federal Agencies

were contacted and requested to provide any concerns or additional investigation

requirements for the proposed project areas.

Based on the responses received, the only item that may result in additional

investigation is if any of the project areas are determined to be in a wetland. If

wetlands will be impacted a permit may be required from the USACE.

TASK 9 – IDENTIFICATION OF CONSTRAINTS

In the Town of Hanna, project constraints range from environmental and access

constraints, to regulatory and compliance constraints. A spreadsheet of project

constraints has been identified in Task 9 of the Final Report with details on qualifying

funding and specific project constraints.

TASK 10 – INPUT FROM LOCAL OFFICIALS

The second project meeting was a combined meeting to present growth and demand

projections, and conceptual project designs. The meeting was held on June 30, 2014 in

Hanna. The Town council, Mayor and operation’s staff were on hand to provide input

on project progress and specific conceptual design concerns. The items presented and

discussed included a review and update of the 2012 Master Plan, identifying and

prioritizing project areas, and discussion of funding scenarios and schedules for projects

based upon priorities.

It was noted that most areas of the Town would be impacted at some point by the

proposed infrastructure replacement projects. The Town acknowledged that the

projects would be locally disruptive while in progress.

2 Western EcoSystems Technology, Inc., City of Hanna Waterline Replacement Environmental Review,

November , 2012


TASK 11 – SCHEDULE OF ACTIVITIES

Project schedule is based on specific project milestones. The main project milestones

for water main projects are: funding application deadlines, design, bidding and finally

construction. Table 5 in Task 11 of the Final Report presents the schedule of the

twenty-nine projects divided into WWDC Eligible and Non-WWDC Eligible projects.

The Town’s top priorities are scheduled in next ten years, with the remaining projects

anticipated to occur twenty years or more in the future.

TASK 12 – LIFE CYCLE COST ANALYSIS AND

FINAL COST ESTIMATES

Life cycle cost is an essential approach to decide on alternative rehabilitation strategies

for infrastructure systems. There are twenty nine conceptual projects proposed in Task

7. Of the twenty nine projects twelve have been identified as very old or failing

infrastructure requiring immediate replacement and seventeen are projects that are

expected to last longer than the twenty year project planning horizon. The

recommended projects are all traditional replacement projects with the exception of the

North and South Tank Loops. The replacement pipe material recommended is PVC;

both for its long term durability and the Town’s familiarity with working with PVC.

The life cycle estimated project total costs are presented in Table 7 in Task 12 of the

Final Report. The itemized estimated project costs developed in Task 7 and presented

in Appendix B of this report were used for the design and construction costs. To assess

the future costs of the projects, an inflation rate of 3% was added to each project based

on the anticipated schedule developed in Task 11. To accommodate the operation and

maintenance costs a $0.25 per foot cost was assessed to each project area over a twenty

year period. Finally, to give the true cost of a project funded in the future with loaned

money, a 2.5% interest rate was applied for a twenty year period. The lifetime costs for

projects planned in twenty years are drastically more than the current year project cost,

however it is important to remember that the final costs will not be realized until 20

years after the project is completed, or 40 years from the date of this report.

TASK 13 – WATER SYSTEM FINANCING

The Hanna water system operates as a Water Enterprise Fund. This section reviews the

enterprise fund operation to determine current and anticipated future water system

revenues and expenses. The statutory requirement of every water enterprise fund is to

be financially self-supporting.


Based on the requirements given in the scope of work and a review of the 2013-2014

budget, Hanna’s water system is not self-supporting. While the expenses are met, an

increase in the base rate of $5.30 would be required for the water fund to provide an

emergency fund equal to 2.5% of the annual operating costs. A base rate increase is

recommended rather than an incremental tiered rate increase, as previous tiered rate

increases resulted in a net reduction of the consumption revenues.

FUNDING SCENARIOS To assess the costs of the projects, several funding scenarios have been investigated.

These scenarios vary from a direct funding by user rates to the use of different loan and

grant programs. The funding scenarios and impact to monthly rates are summarized

Table 2. The six scenarios investigated are described as follows:

1. Scenario one anticipates that only user fees will be utilized to fund the projects

without state, federal or outside funding assistance.

2. Scenario two assumes there will be some combination of WWDC and SLIB

loans and WWDC grants to fund the projects.

3. Scenario three shows the impact to user rates if RUS loans were utilized for the

entire projects costs for all projects.

4. Scenario four shows the impact to user rates if SLIB loans were utilized for the

entire projects costs for all projects.

5. Scenario five shows the impact to user rates if RUS grants for 30% of the project

costs and loans for 70% of the project costs were utilized for the entire projects

costs for all projects.

6. Scenario six shows the impact to user rates if SLIB loans were utilized for the

entire projects costs for all projects. This assumes that Hanna would continue to

qualify for 75% principal forgiveness, and that program funding would continue

for the entire planning horizon.

Various combinations of financing options may require varying amounts of Town

matching funds. This match obligation may require individual user rates to increase.

Any additional funding that can be leveraged as matching funds such as the 1% specific

purpose tax, will reduce the required rate increase amount accordingly. Further rate

adjustments may be required to pay for projects more than 20 years in the future.

To complete the priority projects, the required base rate would vary from $49 to $145

per month. As a comparison, 2.5% of Hanna’s Annual Median Household Income is

approximately $68 per month.


Table 2 – Funding Summary

Funding Source Interest

Rate

Approx

Mo Rate

Increase

Current

Base

Rate

Total

Monthly

Rate

No Outside Funding Assistance NA

Non-WWDC Projects $110

WWDC Projects $432 $35 $577

67% WWDC Grant W/WWDC and SLIB Loan

Non-WWDC Projects 2.50% $34

WWDC Projects 4.0% $8 $35 $77

100% RUS Loan


WWDC Projects 3.25% $23 $35 $104

100% SRF Loans


WWDC Projects 2.50% $21 $35 $91

30% RUS Grant and 70% RUS Loan


WWDC Projects 3.25% $15 $35 $76

SLIB Loan W/75% Principal Forgiveness


WWDC Projects 2.50% $5 $35 $49