3d. Approval of Plans for Pedestrian Overpass1
CITY OF 3d..
CHANHASSEN
690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MINNESOTA 55317
(612) 937 -1900 • FAX (612) 937 -5739
TO: Don Ashworth, City Manager
FROM: Paul Krauss, AICP, Planning Director
DATE: February 9, 1994
SUBJ: Approval of Plans for the Pedestrian Overpass
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As the Council is aware, the City has received 4, Federal ISTEA grant to share in the cost of
constructing a pedestrian bridge. The bridge will span Highway 5 from high ground located east
of the Hanus Building. The bridge has been thought of for many years but is a major component
of the new Highway 5 Plan. It links several neighborhoods on the south with the CBD and may
ultimately connect to a park and ride facility. The grant requires that construction be underway
this summer or we stand to lose the funding.
The firm of Hoisington - Koegler Group was retained to work with staff on the rather involved
design and approval process. The design was subcontracted out to SRF and M S & R Architects.
Several concepts were initially considered. Early on it was concluded that MnDOT would not
permit a roofed structure, that had been discussed when the grant was prepared, due to concerns
over ice damage to vehicles. The one that was selected for refinement is based upon a design
similar to what is found with garden type structures. This will take advantage of the considerable
landscaping and reforestation that will occur around both landing areas. It is also designed to
allow vines to creep onto the structure at both landings and from a central support pillar.
During early staff reviews, we asked that the bridge be given more'definition. As a result, raised
sections were incorporated at the center and both ends. We thought that the center support pillar
appeared undersized in light of the scale of the highway corridor. A larger, more visually
significant structure was added.
The design was taken to the HRA on December, 16, 1993. The initially proposed modifications
would have cut approximately $100,000 from the construction budget. This would have deleted
the raised sections, larger central support and the "floating walkway" concept that the architect
strongly supported. The Planning Commission reviewed the plans on January 12, 1994. They
had computerized graphics that placed the bridge into color photos of the site (these will be
available at your meeting). From the photos they concluded that the raised sections and larger
MEMORANDUM
Don Ashworth
February 9, 1994
Page 2
L
support pillar were important to the design. However, the floating deck, a_$40,000 item, was not
visible due to shadowing. The commission thought this could be deleted and recommended
accordingly.
The HRA reviewed the Planning Commission recommendations at their January 13 meeting.
They voted to fund the project as recommended by the Planning Commission.
At a recent meeting, the Council asked for an opportunity to review the plans. We have thus
scheduled this item for your agenda. I would remind the Council that time is of the essence if
we are to remain on schedule and receive the Federal funding.
MEMORANDUM
CITY OF
CHANHASSEN
I;_ i
690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MINNESOTA 55317
(612) 937 -1900 • FAX (612) 937 -5739
TO: Housing and Redevelopment Authority �,.,
FROM: Todd Gerhardt, Assistant Executive Director t �
DATE: January 14, 1994
SUBJ: Pedestrian Bridge Design
Attached please find a memo from Fred Hoisington outlining the cost differential of the two
desi�- ; „'ves f ^? the highway 5 pedestrian bridge. He also highlighted that the Planning
C, . , r ng Scheme A which included the trellises and the larger center pier, but
support space between the beam and the bridge deck, thus the price difference would
be as follows:
Total Costs
Scheme A $512,500 (Without the space between the beam and deck, but does
include the larger center pier and the pop -up trellises)
Scheme B 6$4 7,500 (Includes smaller center pier, no pop -up trellises, and no
space between the beam and the deck)
Difference:
Staff would recommend that the HRA support the Planning Commission recommendation and
select Scheme A for a total project cost of $512,500.
Attachments
1. Memo from Fred Hoisington dated January 12, 1994.
2. Bridge designs.
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215 P02 JAN 12 '94 14:27
6127835 -3160 HOISINGTON KOEGLER
Noising= Kmeer Group Inc.
MC3
1
on
MEMO I
To: Don Ashworth and Todd. Gerhardt
From: Fred Hoisington, Planning Consulta
Subject: Status of Highway 5 Pedestrian Bridge Design Selection
Date: 1 -12-4 '
for
At the HRA`s regular meeting on December 16, 1993, it expr a prefe s
the lessor of two bridge designs which calls for a s at ace between the
ab: - of the pop-up trellises and elimination of the sP
construction
The cost differential between the options is '
bea ne bridge deck. The u
appro;:Ii $80,000 (cost estimates enclosed). pop-up trellises add less than
$3,000, though the estimates do no reflect that;
the pier and abutments add $41,000
and the space requires a larger superstructure at an added cost of $30,000.
On J anuary , the Planning Commission gave strong support to Schhe
i J y '
ncluding the trellises and large center pi a mea ns to reduce the cos of the bridge.
between the bridge deck and the beam as
endation would reduce Scheme A by $30
The Planning Commission's recomm
35,000.
Also, in response to some of the concerns raised by the � in Dec f dability and
s letter from th ecurity. Please re ew information as part you deliberation.
s
As you are aware, we are under a very difficult schedule to get the bridge designed,
bid and under construction by July of 1994. SRF is continuing to process our
requests through MnDOT and the Federal Highway Administration in anticipation
that the design of the bridge will commence as of January 25,1994•
„f__ . pknrn ngMesign
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
612 -635 -3 HOISINGTON KOEGLER
7671 Qp4°
Past -it Fax N019 rKO+n -ter
N
0
Summary of Estimated Cost Garden Structure
16 December 1993
Prepasd by 3rrgar- Raton- Faxteb, Is&
MS &R
Archheaure
Interior and Urban Deelgn
Meyer, Scherer & Roekeasde, Ltd.
325 Second Avenue North
Minneapolis, Minnesota SSe01.1601
Tel 612 375.0336
Fax 612 312.2216
South Abutment
S<heme A
t $40,000
• eh to
t $35,000
North Abutment
f $40,000
t S35,000
Pier
f $63,000
t $32,000
Superstructure Steel .
*$160,000
t $130,000
Painting
It 510,000
t $10,000
Deck
t $27,000
3 $27,000
Railing
±$120,000
t $120,000
Treatments (Abuts and Piers)
f $25,000
t $21,000
Structure Excavation
t $10,000
* $10,000
Guardrail
$5,000
f $5,000
Subtotals
+$500,000
t $42S,000
10 %, Contingency
t $50,000
t $42,500
Grand Total
t SSS0,000
t $467,300
93 - 4 �Pedv.�s.Aoc
Egwf Opportunity L"pfeyer
215 P03 12 '94 14:27
612 -835 -3160 HOISINGTON KOEGLER
HIGHWAY 5 PEDESTRIAN BRIDGE
ESTIMATE OF TOTAL PROJECT COST
215 PO4 JAN 12 1 94 14:26
1) With pop-up trellises, large center pier and air space between bridge deck and beam.
2) Without these features.
t
Hoisington Koegler Group Inc 1.12 -94
Scheme A 1)
Scheme B 2)
Construction
$550,000
$470,000
Design
93,500
90
Planning
5,000
5
Land Acquisition
28AW
28,600
Legal
;tomes
Total Project Cost
$628,100
$598 o ,600 -
FHWA Contribution OSTEA) -
=-M 000
- 280,000
Total HRA Cost
$402,100
$318,600
1) With pop-up trellises, large center pier and air space between bridge deck and beam.
2) Without these features.
t
Hoisington Koegler Group Inc 1.12 -94
612- 635 - 3160
1
HOISINGTON KOEGLER
December 23, 1993
Fred Hoisington
Hoisington Koegler Group
7300 Metro Boulevard
Edina, Minnesota 55439
Re: Chanhassen Pedestrian Bridge
D= Fred:
215 P05 JAN 12 '94 14:26
MS &R
Architecture
Interior and Urban Design
Meyer, Scherer i Rockcastla, trod.
325 Second Awnue North
Minneapolis, Minnesota 55401.1601
Tel 612 375.0336
Fax 612 342.2216
I'd like to respond to the two concerns raised in your mating with the Chanhassen BRA
about pedestrian bridge. The two concerns, as I understand them, arc durability and
security. The design as it currently stands is a schematic design and, after approval to
proceed further, development of it will address in detail the best durability and security
within the constraints of the budget, MnDOT regulations, and the aesthetic Concept
represented.
Durability: The typical chain link fence used on freeway bridges is 9 -gauge material. We
expect to use a 6- or S -gauge material for the welded wire mesh that is being proposed.
This is substantially stronger. All the framing members which will support the mesh are
sufficiently strong to take any normal use and stronger than normal chain link support.
The finish of all members will be a top quality, field -applied paint over galvanized steel.
Normal ,maintenance on bridges is projected as being repainted the first time 15 years
after initial installation and every 10 years thereafter. We expect this maintenance
schedule to be true for this bridge as well, if not better.
Security: The level of enclosure required along highways varies from circumstance to
circumstance. The typical height of chain link fencing on any freeway vehicular overpass
is eight feet. The pedestrian bridge crossing 14 lanes of traffic at the Walker Art Center
Sculpture Garden has no chain link fence and some pedestrian bridges have chain link
fences that go up the side and over the top. The proposal for Chanhassen to rake the
mesh to a height of eight feet seems to me to be a common sense response. if it is deemed
desirable to fully enclose the bridge, there would be some added cost as well as the
necessity to do some redesign. it is my opinion that fully enclosing the bridge will give it
a claustrophobic and fearful character which is at odds with the city's intentions.
Y urs sincerely,
.. ,, AAAAA
'Tomas Meyer, AIA
cc Gere Seiger, SRF
cAtemp'03341293.doc
z'4
Equal opportunity Employer