C150321 Feasibility Study

• Contract/PO #: CT2015-055
• Contract/PO #: C150321
• Contractor Name: Georgetown, Town of
• Contract Type: Loan
• Water District: 7
• County: Clear Creek
• Loan Projects - Doc Type: Feasibility Study

Prepared For: Town of Georgetown Mr. Tom Hale, Town Administrator 404 6th Street PO Box 426 Georgetown, CO 80444 303.569.2555 Prepared by: F&D International LLC 361 2nd Avenue. Ste.
201 Niwot, CO 80544 303-652-3200 01 June 2011 FEASIBILITY STUDY FOR GEORGETOWN LAKE DAM OUTLET WORKS MODIFICATION PROJECT 01 JUNE 2011
Page | ii Table of Contents Section I – Introduction Page 1 Section II – Project Sponsor Page 3 Section III – Project Location Page 3 Section IV – Project Service Area Page 4 Section
V – Ownership Page 5 Section VI – Water Rights Page 5 Section VII – Need for the Project Page 6 Section VIII – Existing Facilities Page 7 Section IX – Project Page 8 Section X – Project
Pro-Forma Cost Page 11 Section XI – Implementation Schedule Page 12 Section XII – Funding Requirement Schedule Page 13 Section XIII – Financial Plan Page 13 Section XIV – Opinion of
Feasibility Page 14 Section XV – Collateral Page 14 Section XVI – Social, Economic, & Physical Impacts Page 15 Section XVII – Permitting Page 15 Exhibits Exhibit A Page i Exhibit B Page
xi Exhibit C Page xvii Exhibit D Page xviii Exhibit E Page xx Exhibit F Page xxi Exhibit G Page xxiii Exhibit H Page xxix
Page | 1 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado I. INTRODUCTION Georgetown Lake (“Lake”) is an on-channel reservoir on Clear Creek which is a tributary
to the South Platte River. The capacity of the Lake has been calculated at 386.25 acre-feet. The Lake is owned and controlled by the Town of Georgetown (“Town”). The Town is party to
an agreement with the City of Black Hawk (“Black Hawk”) which allows Black Hawk to store up to 100 acre-feet of water in Georgetown Lake. The Town has pending applications in the Water
Court, Water Division No. 1, for junior storage rights in Georgetown Lake, a pending application to confirm storage and use of fully-consumable transmountain water available to the Town
by contract, and a pending application to store by exchange historic consumptive use associated with the Town’s ownership of shares of the Farmers High Line Canal. The Town filed these
water court applications in order to permit lawful storage in the lake for a variety of uses, including recreational, municipal and augmentation. The cases were stayed in the water court
until court approval of an operating plan for Georgetown Lake dam and outlet. Final Orders regarding operation of Georgetown Lake dam and outlet were entered by the Water Court in October
2010, in Case No. 2008CW266. Picture #1 – Georgetown Lake
Page | 2 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado Among other requirements, the Final Orders require construction of increased outlet capacity by April 2015.
Until that time, the Final Orders allow the Town and Black Hawk to store water in the Lake and operate the existing Georgetown Lake outlet under a temporary operational plan. The temporary
plan requires that Georgetown to install a SCADA system, to measure, monitor and account for inflows, storage, outflows, and lake levels so that water can be legally stored in the lake
and released in accordance with the requirements of water administration on Clear Creek. The improved outlet capacity required by the Final Orders must be sufficient to allow release
of 500 cubic feet per second (c.f.s) of water when the Lake is full. (The current outlet capacity is approximately 260 c.f.s.) The Town must therefore be able to fund the construction
of an additional outlet structure (believed by the Town and Black Hawk to be the most appropriate and cost-effective way to increase outlet capacity), and proceed with construction expeditiously
in order to meet the Court-ordered deadline for construction of the new outlet. A copy of the Court’s Final Order is attached as Exhibit A. On 01 March, 2011, the Town submitted an application
(refer to Exhibit B) to Colorado Water Conversation Board (“CWCB”) for consideration of a design and construction loan in order to allow the Town to move forward on the Georgetown Lake
Outlet Modification Project (“Project”). Following the submittal of the CWCB loan application, the Town received a letter from CWCB, indicating that the CWCB Board reviewed the loan
application submitted on 1 March 11 indicating that the CWCB had pre-qualified the Town for funding, refer to Exhibit C. Following the Town’s receipt of the CWCB pre-qualification for
funding, the Town Administer requested formal authorization from the Town’s Board of Selectmen, to proceed with the formal application for CWCB loan approval, refer to Exhibit D.
Page | 3 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado II. PROJECT SPONSOR The project sponsor is the Town of Georgetown. The Town is a Colorado Territorial Charter
Town. The Town was originally chartered in 1866. Refer to exhibit #E for a political boundary and zoning map of the Town of Georgetown. The Town is the sole owner and operator of the
Georgetown Lake, inclusive of the Georgetown Dam and outlet structure. III. PROJECT LOCATION The Project is located at the north side of the Lake. The Lake is located just east of Interstate
Highway 70, north of the Town of Georgetown on Clear Creek. Picture #2 – Aerial View Dam
Page | 4 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado Picture #3 – Aerial View IV. PROJECT SERVICE AREA The Project, as discussed in Section I, is limited to
the Lake’s outlet structure, thus the extent of the project is fairly limited in nature and in terms of construction will only impact a very limited area immediately adjacent to the
dam itself. In terms of total beneficially impacted service area, that would include all of the water right holders within Clear Creek and into the South Platte River. In terms of the
overall service area, the need to execute upon the Project, i.e., to operate Georgetown Lake in accordance with the priority system, and to be able to release a total flow of 500 c.f.s.
when the Lake is full, will be beneficial to downstream senior water rights. The Lake has not previously been administered, with the result that lake evaporation has deprived downstream
senior water rights of water to which they were entitled. The ability of the outlet Georgetown Lake Town of Georgetown
Page | 5 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado to release 500 cfs when the Lake is full lake protects downstream senior water rights from injury in times
of high inflow into the Lake. This release rate was negotiated among the parties to Case No. 2008CW266. The parties included the State and Division engineers, and holders of downstream
senior water rights. Resultantly the project service area can be viewed as all entities receiving benefits from water use along within the South Platte and its tributary Clear Creek,
but when viewed from a narrow perspective, the service area that will be impacted in terms of how to fund the project would be limited to Georgetown and Black Hawk. V. OWNERSHIP The
dam and land on which it is located are owned by the Town. The Clear Creek County Colorado Public Lands Transfer Act of 1993 provided for transfer of certain public lands, including
lands around and underlying Georgetown Lake, to the Town of Georgetown. The Town of Georgetown owns the dam itself. Refer to Exhibit F and G for further ownership information. VI. WATER
RIGHTS The Town supplies municipal water to its customers from an 1866 water right called the “Georgetown Ditch and Reservoir“ water right. This water right was decreed in Case No. 41340
on October 9, 1914, for 3.0 c.f.s (May 1 – October 1) and 1.14 c.f.s (October 1 – May 1), for domestic and municipal purposes, with an appropriation date of January 10, 1866. Although
the decree references a “reservoir,” this is not a reference to the Lake, but rather to a small holding facility of less than one acre-foot.
Page | 6 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado In recent years, the 1866 right has been called out from mid-summer through the end of October. In order
to continue to divert notwithstanding the call, the Town must make up the depletions that are caused to Clear Creek so that senior downstream water rights are not injured. The Town’s
pending augmentation plans are intended to provide such augmentation. Case No. 98CW439 seeking to change the Town’s 1 ½ shares of the Farmers High Line Canal & Reservoir Company to municipal
and augmentation uses. Case No. 08CW145 seeks to use as additional augmentation supplies water stored in Georgetown Lake under pending junior storage applications (Case Nos,. 99CW12
and 07CW324) and transmountain water delivered through the Vidler Tunnel. Thus the Town’s out of priority depletions will be offset when the 1866 right is out of priority by (1) leaving
water from its Farmers High Line right in Clear Creek; and (2) making releases of water from Georgetown Lake. As noted above, entry of the Final Orders in Case No. 08CW266 was necessary
prior to finalizing decrees in the cases described above. All of these cases are set for trial in 2012 or 2013, and Georgetown is hopeful that stipulated decrees will be negotiated prior
to the trial dates in these cases. Two key issues that have impeded negotiated resolutions of these cases have been operation of Georgetown Lake and the quality of the Town’s wastewater
effluent. Operation of the lake was addressed in the Final Orders in Case No. 098CW266, and the Town has recently completed a new wastewater treatment plant that produces an acceptable
effluent quality. Therefore, the Town reasonably believes that stipulated decrees are likely to be reached in all of the pending cases.
Page | 7 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado VII. NEED FOR THE PROJECT The need for this project has been established by the Water Court Final Orders
in Case No. 08CW266, as discussed above in Sections I, IV and VI . To summarize those sections, the Final Orders in Case No. 08CW266 mandate construction of increased outlet capacity
by April 20, 2015. Without such increased outlet capacity, Georgetown cannot use water stored in Georgetown Lake to augment out of priority depletions which occur when its 1866 right
is called out. Therefore Georgetown will be unable to provide a continuous, legal and reliable water supply to its customers when its 1866 right is called out. The temporary operating
plan included in the Final Orders in Case No. 08CW266 is may only be used until April 30, 2015. It is thus crucial for the Town to construct the new outlet capacity and have it online
by April 30, 2015. VIII. EXISTING FACILITIES The Lake’s existing facilities consist of: (1) A reservoir and lagoon. (2) A Dam. (3) An outlet structure capable of releasing approximately
260 c.f.s of water. (4) A SCADA system. (5) Associated hardware. The dam structure is a composite dam consisting of embankment sections on either side of a concrete ogee spillway section.
An existing 48 inch by 48 inch slide gate (outlet structure) is located in the spillway section on the left side as facing downstream. This outlet structure serves as the low level outlet
for the dam.
Page | 8 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado The ogee spillway section of the dam is 100 feet long and 13 feet high. The crest of the spillway is at
an elevation of 8,447.85 ft per the NAVD 8 datum. The spillway apron is at an elevation of 8,434.85 feet. The maximum spillway base width at the apron elevation is roughly 19.5 feet.
The top of the dam is at an elevation of 8,457.85 ft. The existing outlet works (the issue herein), consists of a 48 inch square ARMCO slide gate on the face of the spillway. A 48 inch
square concrete conduit passes through the spillway at an elevation of 8,434.95 ft. The conduit outlet is contoured to complement the ogee shape on the downstream side of the spillway.
The gate is operated either manually or with a recently installed solar powered electric actuator, controlled via a SCADA system. IX. PROJECT The project consists of engineering and
constructing a modification to the Georgetown Lake Dam outlet works so that 500 c.f.s can be released when the Lake is full, in order to implement the Court’s Final Orders in Case No.
2008CW266. Currently the lake’s outlet structure can only release about 260 c.f.s. In 2007, AECOM/TCB evaluated several alternatives to increase the lake’s total release capacity to
500 c.f.s (“Outlet Study”), refer to Exhibit #H. The 2007 Outlet Study evaluated several alternatives for increasing the outlet capacity of Georgetown Lake. in order to allow for the
controlled release of up to 500 c.f.s of stored water. The Outlet Study, as presented in Exhibit #H was not prepared by or under the direction or supervision of either F&D International
LLC nor Todd E. Ficken, PE The Outlet Study considered three alternative designs. The surrounding terrain is very challenging, thus due to the terrain and the constraint of having to
work within the existing dam structure, there were only a limited number of realistic alternatives, specifically:
Page | 9 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado Alternate #1 – Slide Gate: The slide gate option involves installing a new slide gate adjacent to the existing
48-inch slide gate on the upstream face of the spillway at approximately the same invert elevation as the existing gate. According to the Outlet Study, a new 48-inch square gate could
pass the maximum flow increment of 225 c.f.s., and can be throttled to reduce flow through the opening to match the 75 c.f.s. and 150 c.f.s. flow increments. Alternate #2 – By-Pass Pipe
Through Dam: The by-pass pipe alternative through the dam involves installing a new pipe through the left (looking downstream or West) abutment of the spillway. A 48-inch diameter pipe
could discharge the maximum flow increment of 225 c.f.s. A 42-inch diameter gate valve would be included on the downstream end of the pipe to regulate flows through the pipe, and a 48-inch
square slide gate would be included on the upstream end of the pipe to act as a bulkhead. The invert of the new pipe would be located approximately thirteen feet below the crest of the
spillway with an inlet located on the left abutment wall. Installation of the pipe in the existing embankment involves trenching through the embankment, installing the pipe, then backfilling
and compacting the embankment over the pipe. The existing spillway structure concrete and embankment dam were designed for a specific application, and considerations should be made if
the design is altered during construction of the new pipeline. A 48-inch bulkhead gate at the inlet and a 42-inch gate valve at the outlet would be included to operate the by-pass line.
Alternate #3 – By-Pass Pipe Around Dam: The by-pass pipe alternative around the dam involves installing a new 54-inch diameter pipe around the left (West) abutment of the dam. Based
on the topography, an inlet structure would be located approximately 120-ft upstream of the dam on the West side of the reservoir. The pipe would discharge into
Page | 10 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado the creek approximately 100-ft downstream of the existing spillway. The Outlet Study concluded that routing
the pipe completely around the dam may reduce or eliminate regulatory agency requirements. In order to route the pipe completely around the dam, the pipe would need to be located in
Alvarado Rd. Regulation of flow through the bypass pipe would be with a 42-inch diameter regulating gate valve at the downstream end of the pipe. The valve would be housed in a valve
vault and would discharge into a concrete discharge structure on the bank of the creek downstream of the existing spillway. A bulkhead gate at the intake structure would allow drainage
of the pipe for inspection. Based on the topography, it appears that the intake structure could be located between the West side of the reservoir and the East side of Alvarado Road and
would consist of a trash-rack, the bulkhead gate, and a bubbler system to prevent ice formation at the stem. The Outlet Study goes into further detail with respect to; Site Information
Existing Features Alternate Designs Cost Comparisons Comprehensive Analysis of Alternatives Recommendation The reader is referred to the full report Outlet Study for more details. Recommended
Alternative: The Outlet Study recommended Alternative #3, a new bypass around the dam, listing several reasons: Alternative 3 is least likely to be influenced by currently unconfirmed
factors. Alternative 3 uses traditional construction techniques. (No underwater construction or special concrete removal).
Page | 11 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado Alternative 3 removes the project from the State Engineer’s Office jurisdiction (because it is completely
separate from the dam). Subsequent to the Outlet Study, there have been recent infrastructure improvements in the immediate surrounding area to the dam. Such improvement do not have
a nexus to the Project contemplated herein, however such recent infrastructure improvements may have implications in terms of whether or not the suggested best solution as noted in the
Outlet Study is still the best solution. The Town has currently based its financial model and Project description on the 2007 Outlet Study’s best solution, e.g., alternative #3, but
part of the Project does provide for confirmation of whether or not the Outlet Study’s recommendation is indeed still valid and whether or not there are potentially any new and viable
alternatives that the Town may be able to avail itself off. Part of the requested funding includes design efforts in which part of the design efforts will include reevaluating the 2007
Outlet Study recommendation. Resultantly the final engineering solution may be different than what was recommended in the 2007 Outlet Study. X. PROJECT PRO-FORMA COST Based upon the
Outlet Study report and adjusting the cost projections for the time-value of money, the project costs are as outlined in Table #1. Description Est. Cost Engineering Costs1 $225,000 Construction
Costs2 $2,800,000 Other Costs3 $250,000 Total $3,275,000 Table #1 – Forward Looking Pro-Forma Project Costs (2011 Dollars)
Page | 12 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado Notes: (1) Engineering costs are “design costs” inclusive of construction drawings and specifications,
and evaluation of project methodology. (2) Includes permitting costs. (3) Includes, program management, legal, accounting, etc. (4) The project costs were developed from details provided
in the Outlet Study and revised based upon 2011 dollars and other project conditions anticipated at the time of this report. (5) Line item budget amounts include an allowance for owner
contingency. XI. IMPLEMENTATION SCHEDULE In order to ensure the Town is able to meet the deadline for increased outlet capacity established in the Final Orders of the Water Court, the
Town plans to start immediately after funding is approved and in place with the design component of the Project followed immediately with actual construction. It is anticipated that
design aspects of this project will commence in the September 2011 time frame (allowing for three to four months to close on the CWCB financing) or sooner. The design effort is anticipated
to continue through the fall of 2011 and the winter of 2011/2012 with construction starting in the spring of 2012 (as soon as weather and snow melt runoff permits) with the construction
activity being substantially complete by the end of 2012. In terms of permitting, the Town will take advantage of the fall/winter time frame to obtain all entitlements. In the event
that obtaining necessary entitlements take longer than forecasted, the construction schedule may be delayed until the 2012/2013 construction season.
Page | 13 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado XII. FUNDING REQUIREMENT SCHEDULE As noted in the Town’s loan application dated 1 March 11, the applicant
is requesting a $3,000,000 project loan in association with an overall project pro-forma and forward looking budget of $3,275,000. The pro-forma cash flow demand is modeled as follows.
Period Amount August – December 2011 $250,000 January to April 2012 $200,000 April to December 2012 $2,825,000 Currently the pro-forma schedule assumes engineer/design efforts would
commence shortly after receiving CWCB loan commitment. Engineering and design would continue throughout the remainder of 2011 and into the spring of 2012, at which time the project would
move into the construction phase with anticipated substantial completion of the Project by the end of 2012. XIII.FINANCIAL PLAN The Town’s financial plan is to secure financing through
CWCB as noted in the Town’s CWCB loan application dated 1 March 11. Through the Vidler Agreement, as noted above, Georgetown and Black Hawk as parties to the agreement are responsible
to pay a percentage of any Lake improvements. Georgetown is currently negotiating with Black Hawk in terms of contributing up to 50% of the project costs. The form of that contributions,
e.g., whether or not Black Hawk decides to contribute its portion
Page | 14 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado by way of participating in a pro-rata amount of each loan payment when due or contribute its full portion
of the project costs up front, has yet to be determine. It is anticipated that Georgetown will receive up to 50% of the project cost from Black Hawk, regardless if that happens or not,
cash flow to service the loan will be derived from the Town of Georgetown’s water rates through the Water Resources Reserve fund either in part or in full depending on the level of participation
buy the Town of Black Hawk in this Project. XIV. OPINION OF FEASIBILITY The Town and its program manager (F&D International LLC, Todd Ficken PE), believe this is a very feasible and
practical project. In terms of the actual improvements, there appears, as noted in the Outlet Study, to be several alternative solutions to achieve the mandated 500 c.f.s release rate,
in which the suggested alternative, based upon known information, is realistic and practical. In terms of the financial obligations, i.e., the ability to service the CWCB funding, again
the Town believes that there is capacity within the existing service area customers to be able to service the funds. Thus, it is concluded, based upon the information available at the
time this report was prepared that the project is feasible. XV. COLLATERAL Collateral will include a pledge of associated revenues and the project assets.
Page | 15 Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado XVI. SOCIAL, ECONOMIC, & PHYSICAL IMPACTS Social – The Project will have no social impacts since none
of the proposed facilities offer a new recreational benefit nor will any recreational activities be created or lessened. Economic – The Project will have a net positive impact for all
parties involved; From the Town’s perspective, the Town will be able to complete its augmentation plans, and satisfy the Water Court orders. In addition, the Town’s customers will be
ensured adequate, legal and reliable water supply, now and in the future. Senior Water right holders will be assured that their water rights are not injured, resulting in more secure
economic value and benefit of the use of their water rights. Physical Impact – The Project presents no significant physical impacts except for impacts to the immediately surrounding
area during the construction. The impacts will be minor in nature, will affect only a relatively small area, as compared to the Lake itself, and will be properly reclaimed post construction.
XVII. PERMITTING The Town and the Engineer, acting as program manager and in preparing this feasibility report do not believe that an Environmental Assessment (“EA”) or Environmental
Impact Statement (“EIS”) will be required. All work contemplated herein is confined to work on an existing dam. The Corps of Engineers will be contacted concerning 404 permitting but
it is anticipated the work will fall under a Nation Wide Permits which will not require formal permitting.
Page | i Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado EXHIBIT #A – COURT’S FINAL ORDER
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Page | xi Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado EXHIBIT B – CWCB LOAN APPLICATION
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Page | xvii Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado EXHIBIT C – CWCB PRE-QUALIFICATION LETTER
Page | xviii Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado EXHIBIT D – TOWN’S RESOLUTION
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Page | xx Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado EXHIBIT E – TOWN MAP
Page | xxi Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado EXHIBIT F – TOWN OWNERSHIP DOCUMENT
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Page | xxiii Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado EXHIBIT G – TOWN OWNERSHIP DOCUMENT
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Page | xxix Georgetown Lake Dam Outlet Modification Project – Georgetown Colorado EXHIBIT H – OUTLET STUDY Attached
Georgetown Lake Dam /Gate Valve Retrofi t Project December 21, 2007 Final Alternatives Analysis Report
December 2007 Georgetown – Final Alternatives Analysis Report page i Contents 1.0 Introduction ........................................................................................................
............... 1 2.0 Site Specific Information .................................................................................................... 1 3.0 Existing Features...........................
.................................................................................... 1 4.0 Alternatives ...............................................................................................
........................ 2 4.1 Alternative 1 – Slide Gate ..................................................................................... 2 4.2 Alternative 2 – By-Pass Pipe Through
Dam .......................................................... 3 4.3 Alternative 3 – By-pass Pipe Around Dam ............................................................ 4 5.0 Cost Comparison........
....................................................................................................... 5 6.0 Comparative Analysis of Alternatives.....................................................
............................ 5 7.0 Recommendation .............................................................................................................. 8 List of Figures and
Tables Figure 1: Existing Features Table 1: Alternative Advantages and Disadvantages Table 2: Comparative Analysis of Alternatives Appendicies Appendix A: Graphical Representation of