HomeMy WebLinkAbout2010-12-01 PACKET 08.A.COUNCIL ACTION REQUEST:
Approve the preliminary bridge design as presented so final design can begin in order to meet
the necessary time frame for completion.
STAFF RECOMMENDATION:
Council approve the preliminary bridge design as presented so final design can begin in order
to meet the necessary time frame for completion.
ADVISORY COMMISSION ACTION:
DATE REVIEWED
❑ PLANNING ❑
❑ PUBLIC SAFETY F
❑ PUBLIC WORKS ❑
❑ PARKS AND RECREATION ❑
❑ HUMAN SERVICES/RIGHTS ❑
❑ ECONOMIC DEV. AUTHORITY ❑
SUPPORTING DOCUMENTS:
❑ MEMO/LETTER: Jennifer Levitt, November 22, 2010.
F RESOLUTION:
F ORDINANCE:
F ENGINEERING RECOMMENDATION:
❑ LEGAL RECOMMENDATION:
Z OTHER: Bridge Design and Parkway Design.
APPROVED
DENIED
F
F
F
F
F
❑
F
F
1
❑
F
F
F
❑
,.6ty Admij ❑ to
COUNCIL. ACTION TAKEN: /APPROVED F DENIED
]OTHER
From: Jennifer M. Levitt, P.E., City Engineer
Date: November 22, 2010
Re: Approve Preliminary Bridge Design for Ravine Parkway
The City Council on October 6, 2010 reviewed the various options for a ravine crossing. The
direction from Council was to proceed with a concrete girder bridge design with a decorative
valance or skirting. The bridge designer has a draft of the bridge layout completed. The
enclosed plan sheets show the typical section, ravine cross section and plan view of the
bridge. The bridge has a 93'-6" span and provides for 2 -12' travel lanes with 4' shoulders and
a 12' trail on the bridge deck. The bridge utilizes a form lined limestone pattern for the arched
fascia curtain and decorative railing. Also included are 8 columns; 4 columns reside at the
abutments and 4 are at the end of the decorative wall section. There are 4 end post columns
that show a CG logo on them with space for a decorative plaque to be designed by the City
and installed at time of completion.
The Site Design Subcommittee on November 18 recommended proceeding with railing Type
C3. The design was preferred because the arch design mimics the arch on the underside of
the bridge and provides a design element that is different than a simple grid iron appearance.
Also enclosed is a layout for the proposed trails and sidewalks that serve the new Public
Safety/City facility and the Cottage Grove Ravine Regional Park. The City has been working
closely with Washington County to ensure that the trail connections and trailhead to the park
are coordinated as part of the City's building and infrastructure projects.
The current construction estimate for the bridge is $675,000. The decorative arched valance is
$50,000 of that construction cost. The total bridge cost, with 30% engineering, administration,
and legal and a 10% contingency, is $945,000. This cost is tracking below the value provided
in the feasibility report of $1,065,382.
�/�
\
«
\� '
\w�
\
\
\� k
\ �.d
/
�� �
\ :\ '
\� \�
»
�t� �
� \\ �
�� 1
\
`�
� \
�
\ \/ e
� �@
° :k
\���
:�
%
2 «/
«����:
« :
> /..��
/�
���
a
�
G �
\ � �.
/ \ ��=
�2
�.�
\�
w .�
/.. ..s
2 aw
_ �
%
2 ƒ ��
`� �k
� � �t
<� �
U
a
U
m
a
HT
r
` M dv "�1 till I I wc x Q
a I
e
t 1 '
3Q� � I I � I v
z
of o F N
I s K Z5 1 . a
J u l w10� Q �
i • ,. 1 ltll �� M I I I � � I � � ® ~ Y
I I q ® a
zlw i
� Z` wo
j b J i I �I I IWI CO
IX ® W <a
® iltlilil \ mvmm® ° �3 p /�
® llltl w � I j l I IV I '
a
j a
j -- -}-- - e
O b, U I j � {dH(U Z 3 Hd cc
` S
ui
lu
i M ii iul i �
I i t�l 0
I - - --
� a•p� 13�l1S .L98
. I
I I I
I
� a�n
v g'
any
LU
I
i
VW
ZN
N
r
o
W
N
.<I` r i O on N2Q W
-
li
N w
o
¢a�mz¢i. �= z
O
w
N O Sow
N
Z
M
IZ � N
J
X N
X Nl
m
„ll -•96
tvU
o ,� -,l •.0-•ZI x•0-.91 - �� - ••0-•91 .•B -•[
i
i
I
I
_ T j _.
z - j
m i o°m4m
;��W
o e
I d,
••0-
j I i
j I I
j 1 I
I I
I I I
.- ._. -. -i_.
o i
o I I
z
O
a s
= w
z
N'
s
maxi =oa xQ� z
�z a ��.
Z x o c ° .�wz No z o
o W < > ^m
r °
U
1az sw
WZao Vim¢ ° o �oz z.
Z
V ° uN¢xN ci `..a o ¢VNNa. -• �. wo r¢Vt. 2N mN
0
�a4a3W z
i I ! MV89 Z
j 3NIAVU Q
rc- i a
i I
I I I
I 1 I
I j I
�I
I a
e
I v!
a y v
xl
_i ---- __ _ ___ ____ ___ _ _ ----
RA
u iQ® i � mam L
of
O,
I
2 °
Wau � >w
aN
Mf
�
z Gj a 2 x W.. 3
aeaa �a z
z Waw
Z `az¢f 3 ®Z
V6wOOwo> h a Ug�E gO
z`o� �,zp° �NZCS
3 U'$6a11 Z d r V ME t- NtV.�3
Icr
l�
T
7
0
a
N
°
moo
I
j
>za
W
X
NWO
Was
S
gY
zo �3 Q Iw
...W OY iW
hJXaWm NSW
i
1
X N
X Nl
m
Z >. j.
a
ygw
z
Fz Z pa, y ° j �� °O a 6 w Im
i
m
omF
5, -1, zo zg� i
Z
N
2
>
_
0. J I
J�a�N oz
2 1-
W
W
H
a ,Lm =w6 a
4
p
wi
W
s °:
I v x- v 2 o
o°
U
�a4a3W z
i I ! MV89 Z
j 3NIAVU Q
rc- i a
i I
I I I
I 1 I
I j I
�I
I a
e
I v!
a y v
xl
_i ---- __ _ ___ ____ ___ _ _ ----
RA
u iQ® i � mam L
of
O,
I
2 °
Wau � >w
aN
Mf
�
z Gj a 2 x W.. 3
aeaa �a z
z Waw
Z `az¢f 3 ®Z
V6wOOwo> h a Ug�E gO
z`o� �,zp° �NZCS
3 U'$6a11 Z d r V ME t- NtV.�3
Icr
l�
T
7
0
a
N
N
d
Z
0
6
i� Iz
0 ¢
CL
H
r
N
Z
N
0
z
W X
0 X
� X
M
_ F-
W
W
2
N
LLl
CO
W
N
Z
° W
wi N
,4N
z
NO
w
. t-u
W
-cN
Z
QN
�W
MN
OZ
!r �
mH
anaan.aa
O
t- ° w
U a
W ¢
41,
dtlkld[tl W ssylo �
IIi SStlIJ
aaaa
aii.aaaaa
W
O
Pr
m
o�44"
UH?
Zy°j66°.
°z
4 >
ZF
° z N'^QQ�4�Www��WWi.W�
>
>j
>
>
>
>
N J
u
w
z
m�
w
¢m
u
N Nm
WWZ
°ivz
a ¢ z
�-
a
O
w
l u
o���'
zzz�x
a
W W
<� uu
w
-o.
o �Qiu
° u www w mw u ��s
°w
» >c
ui'nW
r
W
a
v
�w
=�
o
mrr..ww
z
Wwwzza
¢¢NNUUmowuaoaa¢¢uuuoau
-omzN
�i
=c
- oam¢
oav�+u
2
v
az o¢�zurx.
= ~y~• a
¢¢
aa3�oo
:.¢zz
z
u uoa
w
o0
0066
o00
o00
N
d
Z
0
6
i� Iz
0 ¢
CL
H
r
N
Z
N
0
z
W X
0 X
� X
M
_ F-
W
W
2
N
LLl
CO
W
N
Z
° W
wi N
,4N
z
NO
w
. t-u
W
-cN
Z
QN
�W
MN
OZ
!r �
mH
J
Q
a < dVadtb ~ z
W
c ` A 6 b��� HD a a
o a 6 a
o K
o ¢ am
w
o (I
Z
Z Z
4 -
ro
aQ
0
as
tr
a
z
r
z
00
I
M
tea=
0
rr
0
F-
w
a
CL
r
r
Z.
Z °
O
t- ° w
U a
W ¢
41,
dtlkld[tl W ssylo �
IIi SStlIJ
I UvInN °
IlV'IfiNtlH9 a
J
Q
a < dVadtb ~ z
W
c ` A 6 b��� HD a a
o a 6 a
o K
o ¢ am
w
o (I
Z
Z Z
4 -
ro
aQ
0
as
tr
a
z
r
z
00
I
M
tea=
0
rr
0
F-
w
a
CL
r
r