09/11/2001 - City Council Special
MEMO
_ city of eagan
TO: HONORABLE MAYOR AND CITY COUNCILMEMBERS
FROM: CITY ADMII~IISTRATOR HEDGES
DATE: SEPTEMBER 7, 2001
SUBJECT: SPECIAL CITY COUNCIL WORKSHOP/SEPTEMBER 11, 2001
COMMUNITY VISIONING PROCESS /CARL NEU
One of the goals adopted earlier this year, Goal #12, includes a process for community visioning. Carl
Neu, Neu and Company, who facilitated the retreats eazlier this yeaz has prepared a proposal entitled
"Eagan, Minnesota, Community Visioning- Going for the Gold, Our Vision-Our Future". A copy is
enclosed without page number. It was the pleasure of the City Council that a conference call be
arranged with Mr. Neu to further discuss this goal. Arrangements have been made to contact Mr. Neu
at 4:45 p.m. in conference rooms A & B so he can shaze more about the community visioning strategic
planning process with the entire Council through the benefit of a speaker-phone dialogue with the City
Councilmembers.
ACTION TO BE CONSIDERED:
To consider the community visioning process and if it is the City Council's desire to proceed ahead,
determine a method of financing which could be from the City's contingency fund for 2001. If the
project is to proceed, a first step is to determine a leadership group appointed by the City Council.
STORM MITIGATION ITEMS
1. Gibraltar Trail (Project 844) Project Consideration - At the Council meeting of September 4, the
Council received the bids for Contract 01-15 (Storm mitigation Improvements). One of the projects
incorporated into that contract was Project 844 (Gibraltar Trail). The staff reminded the Council that
this project had not been formally approved by Council action as a result of the public hearings held
Apri126. Council direction at that time had been to proceed with the prepazation of detailed plans,
specs and easement acquisitions with formal action being deferred to a later date when funding
availability was better defined. Since that time, the City has received a grant from the State Legislature
for $5 Million towazds the estimated total cost of $8+ Million. Enclosed on pages ~ through ~ is
a memo from the Public Works Director providing background information for the Council's be efit in
discussing the appropriate disposition of this specific project.
ACTION TO BE CONSIDERED:
Approve/Deny/Continue Project 844 (Gibraltar Trail), and if approved, authorize the continuation of
easement acquisition.
2. Project 824, Beacon Hill / Almquist Lake -Project 824 consists of several storm mitigation
improvements in the general Beacon Hills/Covington Lane azea. The various elements of this project
were incorporated into Contract O 1-15. The bids for this Contract were presented to the Council for
consideration of contract award on Sept. 4, but these various project areas under this project were
deferred until all required easements were obtained. However, there is one element within this project
area that the Council should review and give direction to staff for further easement negotiations
regarding acquisition compensation for the potential to incorporate a Water Quality treatment pond
improvement into the Storm Mitigation contract for efficiencies of scale and potential overall cost
savings. This proposal is addressed in the memo from the Public Works Director enclosed on pages
through ~.
ACTION TO BE CONSIDERED:
Approve/Deny the negotiated compensation of fair market value for the acquisition of a Water Quality
Pond and Utility easement for Lots 7 & 8, Block 1, Johnny Cake Ridge Addition, and if approved,
authorize the Mayor and City Clerk to execute all related documents.
3. Storm Mitigation Easement Acquisition Status - At the Council meeting of September 4, the
Council considered awarding the contracts for Contracts O 1-14 and O 1-15 for Storm Mitigation
Improvements. Several projects under those contracts were not in order to proceed due to lack of
adequate easements. The Council requested staff to provide an update of these easement negotiations
at the Council Workshop meeting on September 11. Russ Matthys, City engineer, will provide a
verbal report at that meeting.
ACTION TO BE CONSIDERED:
As appropriate.
ENTRANCE MARI~RS /UPDATE
The Image Committee met on Friday, September 07, 2001 to discuss Entrance Monuments and Street-
scaping. The discussion by the committee regazding entrance monuments was three-fold: 1.)
Determining the feasibility of income from cellular antennae use; 2.) Establish design goals/pazameters
for materials, lighting, general image, etc.; and 3.) Prioritization of locations, partially dictated by
available financing.
Discussion regarding street-scaping mainly focused on the design from the standpoint of a uniform
design throughout the City versus a unique design based on the chazacteristics of a given area.
The meeting was very productive and staff will be available Tuesday to embellish the discussion for
the Council's benefit.
GOALS UPDATE
Staff and City Council will have an opportunity to discuss the status of certain goals.
'--
OTHER BUSINESS
There are no additional business items at this time.
/s/ Thomas L. Hedges
City Administrator
3
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MEMO
city of eag
TO: MAYOR AND CITY COUNCIL
THOMAS L. HEDGES, CITY ADMINISTRATIOR
FROM: THOMAS A. COLBERT, DIRECTOR OF PUBLIC WORKS
DATE: SEPTEMBER 5, 2001
SUBJECT: STORM MITIGATION IMPROVEMENTS
- GIBRALTAR TRAIL, PROJECT 844
Project 844 identifies the proposed storm mitigation improvements for the Gibraltaz Trail drainage
azea (Figure 7.4) as identified and discussed in the Preliminary Design Report (PDR) presented to
the public at the Special City Council meeting of April 26, 2001. This area was classified in the
"Meets City Standazds (MCS)" category. At that time, the City did not know to what extent
financing might be available for all the proposed storm mitigation improvements, much less those
in the MCS category. Attached aze the excerpts from the PDR for this azea identifying the various
structure and flood elevations and explaining the proposed improvements. The following is an
excerpt of the minutes from the special public hearing providing direction regazding this status of
this project. Based on the discussion and action taken at the last Council meeting of Sept. 4, the
staff has temporazily stopped any further negotiations of easements until the status of this project is
re-addressed by the Council.
GIBRALTAR TRAIL
(4-26-O1 minutes excerpt)
Mayor Awada stated that since the area meets city standards, the improvements must be
delayed until fiscal resource issues have been resolved. Three residents spoke and
expressed concern about the repeated flooding and support for the project. They further
commented on the likelihood of funding and the project moving forward if possible in
2002.
Councilmember Tilley moved, Councilmember Fields seconded a motion to authorize the
preparation of construction plans and specifications and easement acquisition for Storm
Drainage Mitigation Improvements for Group Area #7.4 Gibraltar Trail with the
understanding that the project will move forward only after funds become available and
the Council gives the project formal reconsideration. Aye: S Nay: 0
Russ Matthys, City Engineer, will be available to provide additional information regazding this
project during my scheduled absence from the Sept. 11, Council workshop.
- ,
~-~ /~ z:
~~
Thomas A. Colbert
CC: Russ Matthys, City Engineer (w/o enc)
Enc: PDR Report, Area 7.1
J
4.7 AREA 7 -Lexington Square (Figure 7.9 for drainage area drawing)
4.7.1 North view Park/Clinton Trail (Gibraltor Trail) -Figure T.2, 7.3, and 7.4
Issue(s): Nine residences were impacted due to street flooding
Category: MCS (Low entries meet required freeboard elevation for the 1%HWL)
Existing Conditions:
• Low Entries
0 9 residences, 888.4 - 890.5
• 1 % Rainfall High Water Level - 886.0
• Applicable Freeboard Criteria - 2' above HWL
o Required Freeboard - 2'
o Actual Freeboard - 2.4'
o Meets City Freeboard Criteria? -YES
• July 2000 Storm Peak - 890.7
Special Considerations: Flooding of residences in this area occurred as a result of the 1987
Superstorm. Afterwards, stormwater drainage improvements were made involving installation of
a larger pipe to drain the low point in Gibraltor Trail west to Pond JP-9. These improvements
were designed to meet flood protection criteria for the 1 % rainfall event. However, further
improvements will be needed to protect to the July 2000 storm benchmark.
Description of Basic Improvements: None needed.
Description of Additional improvements: The following improvements are proposed to protect
homes at the low points in Gibraltar Trail from flooding for an extreme runoff event like that of
the July 2000 storm:
• Separate the storm sewer extending south from Boston Hill Road to Ticonderoga Trail from
the storm sewer serving Gibraltar Trail. This will decrease the drainage area to the Gibraltar
Trail low points.
• Construct storm sewer to convey diverted runoff from the Ticonderoga Trail/Clinton Trail
intersection south under Clinton Trail to an east/west storm sewer in Northview Park. This
will take advantage of the temporary excess capacity in the 42" east/west line before flow
from the upstream pond system reaches this point.
Temporary construction easements will be necessary.
Effect and Cost of Additional Improvements:
• 1 % Rainfall High Water Level - 885.8
• July 2000 Storm Peak - 888.1
• Improvement Cost - $302,000
Meets July 2000 Storm Benchmark? YES
50
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city of eagan
MEMO
TO: MAYOR AND CITY COUNCIL
THOMAS L. HEDGES, CITY ADMINISTRATOR
FROM: THOMAS A. COLBERT, DIRECTOR OF PUBLIC WORKS
DATE: SEPTEMBER 7, 2001
SUBJECT: STORM MITIGATION IMPROVEMENT
- PROJECT 824, BEACON HILL (JOHNNY CAKE/ALMQUIST LAKE
- PONDING EASEMENT)
Project 824 provides for various storm mitigation improvements benefiting the Beacon Hill Rd
Penkwe Way and Covington Lane azea as identified in the Preliminary Design Report (PDR)
presented at the public hearings held on April 27. One of the improvements in this azea (Area 6.4)
incorporates the construction of an intercepting storm sewer in Johnny Cake Ridge Rd to carry the
diverted runoff directly into Ahnquist Lake. As part of this project, the preliminary design proposed
the creation of a detention/treatment pond between Johnny Cake and Almquist Lake in the rear yard
area of Lot 7, Block 1, Johnny Cake Ridge Add. (4760 Penkwe Circle - Mazk Leiferman). During
the negotiations with this property owner and his neighbor to the east, they consented to the
dedication of an easement sufficient to accommodate a storm sewer pipe along their side and reaz
property lines from Johnny Cake Ridge Rd. to Almquist Lake. However, they are not agreeable to
the additional dedication at no cost of a pond and/or outlet easement through the middle of their
backyards incorporating an additiona144,100 sq. ft (1.01 acres) of land.
If the alternate pond easement is not available, 304 feet of additional 27-36" pipe are required
under the base bid to cross these properties along their wooded south property lines at a total project
cost of $93,275. If a pond easement is provided in the natural low azea, a more direct route to
Almquist Lake could be taken with reduced footage/cost of pipe. The total cost of this alternate
storm mitigation improvement would then be only $69,480 (including the cost of the pond
excavation). This results in a potential savings of $23,795. In addition, this pond will provide pre-
treatment of storm water runoff before entering Ahnquist Lake (Class 5 water body). In summary,
this alternate can provide Water Quality benefits to Ahnquist Lake, but at a potential cost equal to
or exceeding the construction savings.
Based on the Council's current policy of not providing any compensation for storm mitigation
improvements, staff is not able to proceed with this water quality benefit opportunity. One option
would be to have the Water Quality Enterprise fund finance the easement acquisition cost ($40-
50,000) for the related water quality benefits to Almquist Lake and let the Storm Mitigation fund
finance the construction at a cost savings of $24,000. The Water Quality Budget has sufficient
funds to finance this expenditure. This would be technically in keeping with the Council's policy.
l~
However, it might appear as if the City were starting to pay for storm mitigation easements, which
has not been done to date. If this concept is acceptable to the Council, staff would like to then
proceed with negotiations for this pond easement before bringing the appropriate change order back
to the Council for authorization to proceed.
Russ Matthys, City Engineer, will be available to address any questions that the Council may have
regarding this issue at the September 11 Workshop.
j ~.~ ~-
Thomas A. Colbert
Cc: Russ Matthys (w/o enc.)
Eric Macbeth, Water Resource Coordinator (w/enc)
Enc: PDR, Area 6.4
G:EngJTAC/memo `O1BeaconHillAlmquistLake
4.6.4 Johnny Cake Ridge/Almquist Lake (Penkwe Way/Ridge Cliffe Drive) - Figure 6.5
Issue(s): Four buildings (16 units) were impacted by street flooding.
Category: FB (Low entries above the 1% rainfall HWL but below the required freeboard
elevation)
Existing Conditions:
• Low Entries
• Buildings (16 units) - 942.2 - 943.0
1 % Rainfall High Water Level -942.0
• Applicable Freeboard Criteria - 2 feet above HWL
o Required Freeboard - 2'
o Actual Freeboard - .2'
o Meets City Freeboard Criteria? - NO
• July 2000 Storm Peak -944.9
Special Considerations: The proposed improvements are key changes to reduce flood potential
in the Penkwe Way /Ridge Cliffe Drive area as well as downstream in the Beacon Hifl Drive
North and the Pond BLP-57/Covington Ct. areas. The proposed improvements will increase
peak water elevations in Almquist Lake (Pond BLP-4) from 915.6 to 916.7 (1.1') for the 1%
rainfall and from 919.5 to 921.1 (1.6') for July 2000-type event. The normal water level of the
pond would remain unchanged at 912.0. The low entry adjacent to Pond BLP-4 is at 926.1, so
freeboard criteria for this pond would easily be met even after the proposed improvements are
constructed.
Description of Basic Improvements: The improvements proposed are:
• Block overland drainage from Johnny Cake Ridge Road to Penkwe Way. This improvement
will significantly reduce the amount of water reaching the Penkwe Way /Ridge Cliffe Drive
intersection during large runoff events.
• Construct a 48" storm sewer from the low point in Johnny Cake Ridge Road to Almquist
Lake (Pond BLP-4). This improvement will provide a means of diverting runoff which would
otherwise reach Penkwe Way to Pond BLP-4, which has substantial un-used storage
capacity. A pond would be constructed to catch and fully treat the diverted runoff prior to
discharge to Pond BLP-4.
Permanent drainage and utility easements covering some of the project area exist. However,
additional permanent drainage and utility easements will be needed, as will temporary
construction easements.
Effect and Cost of Basic Improvements:
• 1 % Rainfall High Water Level - 940.5
• July 2000 Storm Peak - 942.3
• Improvement Cost - $402,000
Meets Citv's 1 % Rainfall Freeboard Criteria? NO (misses by .3')
Meets July 2000 Storm Benchmark? NO (misses by .1')
44
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