HomeMy WebLinkAboutCC Item H4
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AGENDA STAFF REPORT
11f FORNP
DATE: May 9, 2016
TO: Honorable Mayor and City Council
THRU: Jill R. Ingram, City Manager
FROM: Jim Basham, Interim Director of Public Works
SUBJECT: RECEIVE AND FILE THE WESTMINSTER AVENUE
STORM DRAIN STUDY REPORT PROJECT CIP NO.
ST1603 AND AUTHORIZE STAFF TO PROCEED WITH
THE BCIP GRANT APPLICATION SUBMITTAL
SUMMARY OF REQUEST:
That the City Council:
1. Receive and file the Westminster Avenue Storm Drain Study Report
Project CIP No. ST1603; and
2. Adopt Resolution No. 6643 authorizing application submittal for the
Bicycle Corridor Improvement Program.
BACKGROUND AND ANALYSIS:
The purpose of the Westminster Avenue Storm Drain Study Report Project CIP
No. ST1603 is to prepare a storm drain study report of the Westminster Avenue
Channel (Channel) that would determine the size of an enclosed storm drain
facility which would allow the use of its property above the Channel as a Class -I
bike path.
The Channel is an existing concrete trapezoidal open channel that extends an
estimated 3,350 feet from west of the southeast corner of Leisure World to the
Federal Storm Channel towards the West City Limits (WCL). A large portion of
Leisure World and the surrounding developments drain into the Channel.
At the October 12, 2015 City Council meeting, the City Council approved a
professional services agreement with Anderson Penna Partners, Inc. to prepare
a report, which would determine if the Channel could be covered and the size of
the storm drain facility.
The report analyzed various options regarding possible relocation and different
cross - sectional shapes of the storm drain facility. The report concluded that the
Agenda Item H
most feasible and cost effective option is installing approximately 1,992 feet of
54 -inch and 1,419 feet of 72 -inch reinforced concrete pipes (RCP) in the existing
Channel alignment.
One of the primary objectives for the Public Works Department is to locate grant
opportunities. Currently, the Bicycle Corridor Improvement Program (BCIP) grant
is available and accepting applications.
The BCIP is a federally funded grant that is administered by Orange County
Transportation Authority (OCTA) and it provides funds available for bicycle and
pedestrian improvement projects to local agencies. Projects eligible for the BCIP
include, but are not limited to new bicycle facilities, improvements to existing
bicycle facilities, bicycle racks, parking and lockers.
A BCIP grant application will be submitted for a new Class -I bike path, which
provides a roadway for the exclusive use of bicycles and pedestrians. The
Westminster Avenue Class -I Bike Path Project (Project) will include enclosing the
Channel with RCP and constructing a Class -I bike path above the storm facility
located outside the northerly roadway of Westminster Avenue between Seal
Beach Boulevard to WCL. This Project will be an addition to the existing Class -II
bike lane in each direction.
ENVIRONMENTAL IMPACT:
There is no environmental impact related to this item.
LEGAL ANALYSIS:
The City Attorney has reviewed and approved this item.
FINANCIAL IMPACT:
In the approved FY 2015/16 Budget, $70,000 of General Fund was identified for
the Westminster Avenue Storm Drain Study Report Project CIP No. ST1603.
Anderson Penna Partners, Inc. service fee was $38,480 leaving a balance of
$31,520 to be returned to the General Fund.
The BCIP requires a 12% minimum local match. OCTA grant request will be
$2,464,000 and with the City's required 12% match of $336,000 from State Gas
Tax the total Project cost will be $2,800,000. The following is a breakdown of the
proposed financing for the Project:
Page 2
Fiscal Ye ar
Phase
BLIP Request
City Match
(12%)
Total
FY 2016 -17
Environmental &
Design
$ 316,800
$ 43,200
$ 360,000
FY 2017 -18
Construction
$ 2,147,200
$ 292,800
$2,440,000
TOTAL
$ 2,464,000
1 $ 336,000
$2,800,000
RECOMMENDATION:
That the City Council:
1. Receive and file the Westminster Avenue Storm Drain Study Report
Project CIP No. ST1603; and
2. Adopt Resolution No. 6643 authorizing application submittal for the
Bicycle Corridor Improvement Program.
MITTED BY:
I/
JI 'i3asnam
In Brim Director of Public Works
NOTED AND APPROVED:
IMIMMUMEMM qk;.-
Prepared by: Cesar Rangel, Associate Engineer
Attachment:
A. Resolution No. 6643
B. Westminster Avenue Storm Drain Study Report
Page 3
RESOLUTION NUMBER 6643
A RESOLUTION OF THE SEAL BEACH CITY COUNCIL
AUTHORIZING APPLICATION FOR FUNDS FOR THE BICYCLE
CORRIDOR IMPROVEMENT PROGRAM FUNDED WITH
CONGESTION MITIGATION AND AIR QUALITY IMPROVEMENT
PROGRAM FUNDING UNDER THE MOVING AHEAD FOR
PROGRESS IN THE 21sT CENTURY AND FIXING AMERICAS
SURFACE TRANSPORTATION FEDERAL TRANSPORTATION
ACT FOR WESTMINSTER AVENUE CLASS -1 BIKE PATH
PROJECT
WHEREAS, the United State Congress enacted the Moving Ahead for Progress
in the 21St Century (Map -21) Federal Transportation Act on July 6, 2012 and
Fixing America's Surface Transportation (FAST) Federal Transportation Act on
December 4, 2015, which makes Congestion Mitigation and Air Quality
Improvements Program (CMAQ) funds available to the Orange County
Transportation Authority (OCTA); and
WHEREAS, OCTA has established the procedures and criteria for reviewing
proposals; and
WHEREAS, City of Seal Beach possesses authority to nominate bicycle
projects funded using Congestion Mitigation and Air Quality funding and to
finance, acquire, and construct the proposed project; and
WHEREAS, by formal action the City Council authorizes the nomination of
Westminster Avenue Class-] Bike Path Project, including all understanding and
assurances contained therein, and authorizes the person identified as the official
representative of the City of Seal Beach to act in connection with the nomination
and to provide such additional information as may be required; and
WHEREAS, the City of Seal Beach will maintain and operate the property
acquired, developed, rehabilitated, or restored for the life of the resultant facility
or activity; and
WHEREAS, with the approval of the California Department of Transportation
(Caltrans) and OCTA, the City of Seal Beach or its successors in interest in the
property may transfer the responsibility to maintain and operate the property; and
WHEREAS, the City of Seal Beach will give Caltrans and OCTA's
representatives access to and the right to examine all records, books, papers or
documents related to the bicycle project; and
WHEREAS, the City of Seal Beach will cause work on the project to be
Resolution Number 6643
commenced within six months following notification from the State that funds
have been authorized to proceed by the Federal Highway Administration and
that the project will be carried to completion with reasonable diligence; and
WHEREAS, the City of Seal Beach commits $336,000 of State Gas Tax and will
provide 12% of the total project cost as match to the requested $2,464,000 in
OCTA CMAQ funds for a total project cost estimated to be $2,800,000; and
WHEREAS, the City of Seal Beach will comply where applicable with provisions
of the California Environmental Quality Act, the National Environmental Policy
Act, the American with Disabilities Act, Federal Transit Administration Title VI,
Buy America provision, and any other federal state and /or local laws, rules
and /or regulations; and
WHEREAS, the City of Seal Beach's City Council authorize the execution of any
necessary cooperative agreements between the City of Seal Beach and OCTA
to facilitate the delivery of the project; and
WHEREAS, City of Seal Beach will amend the agency Capital Improvement
Program (CIP) to include the project if selected for funding.
NOW, THEREFORE, BE IT RESOLVED:
Section 1. That the City of Seal Beach, hereby authorizes the City Manager as
the official representative of the City of Seal Beach to apply for the
Congestion Mitigation and Air Quality funding under the Moving
Ahead for Progress in the 215t Century Federal Transportation Act
and Fixing America's Surface Transportation Act for the
Westminster Avenue Class -I Bike Path Project.
PASSED, APPROVED and ADOPTED by the Seal Beach City Council at a
regular meeting held on the 91" day of May, 2016 by the following vote:
AYES: Council Members:
NOES: Council Members:
ABSENT: Council Members:
ABSTAIN: Council Members:
Sandra Massa - Lavitt, Mayor
Resolution Number 6643
ATTEST:
Robin L. Roberts, City Clerk
STATE OF CALIFORNIA }
COUNTY OF ORANGE } SS
CITY OF SEAL BEACH }
I, Robin Roberts, City Clerk of the City of Seal Beach, do hereby certify that the
foregoing resolution is the original copy of Resolution Number 6643 on file in the
office of the City Clerk, passed, approved, and adopted by the Seal Beach City
Council at a regular meeting held on the 9`h day of May, 2016.
Robin L. Roberts, City Clerk
Westminster Avenue Storm Drain
Study Report
from Seal Beach Boulevard to Federal Storm Channel C01S06
Apri12016
Submitted by:
ANDERSONTENNA
.PARTNERS IN PROJECT DELIVERY-
3737 BIRCH STREET, SUITE 250
NEWPORT BEACH, CA 92660
(949) 428-1500
WWW.ANDPEN.COM
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Westminster Avenue Storm Drain Study Report
from Seal Beach Boulevard to Federal Storm Channel C01 S06
Table of Contents
Tableof C ontents .............................................................................................................................. ..............................i
Purposeof Storm Drain Study ................................................................................................. ..............................2
Description of Existing Facilities .............................................................................................. ..............................2
Development of Drainage Areas ............................................................................................. ..............................3
Existing /Proposed Hydrologic Data ......................................................................................... ..............................4
Hydraulics and Proposed Storm Drain Si7es ............................................................................ ..............................4
ConstructionOptions ............................................................................................................... ..............................4
RecommendedOption ............................................................................................................. ..............................5
EngineeringCost Estimate ...................................................................................................... ..............................5
C onclusion............................................................................................................................... ..............................5
Appendix A — Westminster Channel Hydrology Map ....................................................................... ..............................6
AppendixB — Cross Sections ............................................................................................................ ..............................7
AppendixC — Hydraulic Calculations ............................................................................................... ..............................8
AppendixD — Engineering Cost Estimate ........................................................................................ ..............................9
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Westminster Avenue Storm Drain Study Report
from Seal Beach Boulevard to federal Storm Channel (01S06
Purpose of Storm Drain Study
The City of Seal Beach (City) contracted with AndersonPenna Partners, Inc. (APP) to prepare a drainage report
involving the following tasks:
• Review of existing information
• Field review
• Hydrology study
• Orange County Flood Control District (OCFCD) coordination
• Hydraulic analysis
• Develop and evaluate alternatives
Description of Existing Facilities
The existing concrete trapezoidal channel is approximately 3,350 feet long and traverses from just west of the
southeast corner of Leisure World Seal Beach (LWSB) to the Federal Storm Channel (CO1 S06). It has three reaches as
described in the table below:
Channel Reach
Length
Base Width
Height
Upper Reach
610 Feet
6 Feet
3.5 Feet (min.)
Middle Reach
1,640 Feet
3 Feet
6 Feet
Lower Reach
1,100 Feet
4 Feet
6 Feet
The channel is located along the entire southerly length of LWSB, south of the perimeter wall. The distance
between the south perimeter wall and the northerly edge of the channel varies from about six feet at the easterly
end to over 30 feet at the westerly end. At its upstream end, the channel collects runoff from LWSB through a
culvert beneath the perimeter wall and from the commercial development to the east via two 30 -inch storm drain
pipes that enter the channel from the east. There are also several 12 -inch pipes that outlet to the channel from the
south. The upper and middle channel
reaches are connected by three (3) 85 -foot -
long culverts installed under an access path —�
from Westminster Avenue to the north side
of the channel. The north half of — /f� Ham✓ !x}f_ *rs
Westminster Avenue drains into the
channel through openings in the curb
located along the north side of the street..
Several corrugated metal storm drains u `
extend southerly from the LWSB property
and outlet to the channel. The channel
outlets into C01S06 just north of the _ '-
Westminster Avenue bridge over the '
C01S06. The north bank of the channel is
generally higher than the south bank. The
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Westminster Avenue Storm Drain Study Report
from Seal Beach Boulevard to Federal Storm Channel (01S06
existing concrete channel lining is in fair condition.
Traffic signal poles, electrical panels, pull boxes, telephone vaults, and a power pole guy wire anchor are located
between the southerly curb and gutter and the south side of the channel. Overhead utility poles are located just
south of the southerly LWSB perimeter wall.
Currently, the existing channel lies partially within the City right -of -way for Westminster Avenue and partially
within private property belonging to LWSB. Based on preliminary information obtained, the public right -of -way
line is approximately located in the centerline of the existing channel.
Development of Drainage Areas
To determine the design discharge of the existing channel, it was first necessary to determine areas tributary to the
channel. Initially, APP utilized existing City and County atlases and record drawings as well as available topographic
maps. Included among this information were the LWSB Storm Drain System map, Seal Beach Master Plan of
Drainage Update, record drawings for Westminster Avenue and the existing channel, Orange County Flood Control
District Base Map of Drainage Facilities in Orange County, and various local construction plans. These atlases and
plans gave APP a preliminary layout of the tributary area of the channel. However, to accurately refine the tributary
area, a series of site visits were conducted. These site visits determined the delineation of the drainage areas and
determined which existing City and LWSB storm drain systems outlet to the channel. The bulk of the effort for this
site visit task was focused on the southerly portion of LWSB, the commercial development at the northwest corner
of Seal Beach Boulevard and Westminster Avenue and the commercial and industrial developments on the south
side of Westminster Avenue.
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The site visit to LWSB confirmed that the
community is very flat. The existing storm drains
shown (and not shown) on their record drawings
were located and inspected and grade breaks
within the community were located. Generally the
tributary area for the channel is located south of
C01S06, bounded by LWSB's walls on the west,
east and south, and by Merion Way and St.
Andrews Drive on the north.
The site visit to the commercial development at the
northwest corner of Seal Beach Boulevard and
Westminster Avenue included inspecting Seal
Beach Boulevard and Westminster Avenue. The
site and storm drain inspection of the commercial areas was performed with the assistance of City personnel who
opened several storm drain grates to verify direction of flow. It was determined that the entire commercial area
outlets to the channel via public and private storm drain systems and enters the existing channel at the upstream
end through two 30 -inch storm drain pipes.
A catch basin within Seal Beach Boulevard approximately 430 feet north of the Seal Beach Boulevard / Westminster
Avenue intersection confirms that the basin outlets east. However, as there is some portion that would bypass the
catch basin during large storm events, APP included this small area within the existing channel watershed.
31P a g e
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Westminster Avenue Storm Drain Study Report
� 7w;„* from Seal Beach Boulevard to Federal Storm Channel C01 S06
It was determined that a large portion (approximately the western half) of the south side of Westminster Avenue is
not tributary to the existing channel. This area drains to an existing storm drain system on the Boeing property and
flows to the west directly to the Federal Storm Channel. However, there is a small portion (approximate eastern
half) along the south side of Westminster Avenue that is tributary to the channel which outlets through a number of
12 -inch storm drains under Westminster Avenue directly to the existing channel. As mentioned previously, the
north half of Westminster Avenue drains directly into the existing channel through openings in the northerly curb.
The entire tributary area to the existing channel is approximately 64 acres. Please see the Westminster Channel
Hydrology Map, Appendix A, which shows the watershed delineations referenced above.
Existing /Proposed Hydrologic Data
After determining the tributary drainage areas to the existing channel, APP utilized the Orange County Rational
Method hydrology software program. This program along with information from the Orange County Hydrology
Manual was utilized to determine the peak discharge data to the existing channel at various concentration points
that were identified during the site visits for various frequencies. The City requested flows be calculated for the 5,
10, 25 and 100 year return storm events. The discharge flowrates in cubic feet per second (cfs) are shown on the
Westminster Channel Hydrology Map, Appendix A.
Hydraulics and Proposed Storm Drain Sizes
Once the existing peak flowrates were determined,
those values were used to calculate the proposed
storm drain sizes required to convey the 100 -year
return storm event. The hydraulic program "Water
Surface Pressure Gradient' (WSPG) was utilized to
find the hydraulic grade line and determine the the
proposed storm drain sizes. The proposed storm
drain pipe sizes were calculated to be
approximately 1,992 feet of 54 -inch and 1,419 feet
of 72 -inch reinforced concrete pipe (RCP). The
increase in pipe size occurs at the confluence of
flow from LWSB at concentration point B as shown
on the Westminster Channel Hydrology Map in
Appendix A.
Construction Options
APP met with City staff during various points of the evaluation. Numerous options were discussed regarding where
to locate the proposed storm drain, with the obvious least- disruptive location being north of the northerly
Westminster Avenue curb. As mentioned above, one concern with constructing a new storm drain system is that
the existing northerly Westminster Avenue right -of -way is located near the centerline of the existing channel.
Therefore, an easement would have to be acquired from LWSB to construct the storm drain. Initial discussions with
LWSB staff indicate that they will reconstruct the southerly perimeter wall in its present location, thereby avoiding a
physical conflict with the new proposed storm drain system. City staff also stated that the existing open channel
was a safety concern and they would also like to pursue locating a bicycle path or trail in the general location of the
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ANDERSON PENNA
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Westminster Avenue Storm Drain Study Report
from Seal Beach Boulevard to Federal Storm Channel C01 S06
existing channel. Therefore, the channel would need to be covered in order to locate the bicycle trail within the
channel's general location.
After discussions with City Staff and taking into consideration the issues and calculations above, it was determined
that the most cost - effective and feasible option is to construct the proposed storm drain along the existing channel
alignment.
Recommended Option
The recommended option will require the removal of the entire existing channel and the construction of the
proposed storm drain at roughly the same horizontal location. This option will also require utility adjustments for
the area between the existing channel and the northerly Westminster Avenue curb and will require a large amount
of fill material to be imported to backfill the remainder of the void left by the existing channel. There were
discussions regarding installation of RCP versus cast -in -place concrete box culverts. The cost of a box culvert
typically exceeds the price of equivalent size RCP, unless the RCP diameter is over100 inches and the cost differential
increases as the width of the box increases relative to the height of the box. APP also proposes to lower the vertical
alignment of the proposed storm drain below the invert of the existing channel. The lower pipe invert will allow for
the increase of the longitudinal gradient of the pipe, which will also ensure that the proposed pipe will have enough
cover over the pipe. The storm drain invert is proposed to be lowered approximately 4.8' at the downstream end of
the channel. As shown in the photo below, the 4.8' elevation difference corresponds to an existing drop near the
junction of the existing channel and the Federal Storm Channel COI S06.
Engineering Cost Estimate
The project has an estimated construction cost of $1.88 million. Appendix D shows the breakdown of the unit costs
of all items of construction. However, because of the unknown costs of land or easement acquisition and because
construction of the bicycle trail is not a part of this Study, the engineering cost estimate does not take these items
into consideration.
Conclusion
Based on the construction cost estimate and the
feasibility of the design, AndersonPenna
Partners concludes that the discussed
recommended option would be a viable option
for replacement of the existing Westminster
Avenue Channel. This option would provide the
City with a complete project that addresses the
safety concerns of the existing open channel
that the City has previously expressed.
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Westminster Avenue Storm Drain Study Report
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Appendix A - Westminster Channel Hydrology Map
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from Seal Beach Boulevard to Federal Storm Channel C01 S06
Appendix B - Cross Sections
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from SealBeach Boulevardto Federal Storm (hannel(01506
Appendix C - Hydraulic Calculations
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Trapezoidal Channel Analysis & Design
Open Channel - Uniform flow
Worksheet Name: WESTMINSTER CHANNEL
Description: LOWER REACH_1,100 FT.
Solve For Discharge
Given Constant Data;
Bottom Width.......
Z- Left .............
Z- Right............
Mannings 'n'.......
Channel Slope......
Channel Depth......
Bottom Z -Left Z -Right
Width (H:V) (H:V)
ft
4.00
0.50
0.50
0.015
0.0005
6.00
Mannings Channel
'n' Slope
ft /ft
4.00 0.50 0.50 0.015 0.
Description: MIDDLE REACH-1,640 FT.
Solve For Discharge
Given Constant Data;
Bottom Width.......
Z- Left .............
Z- Right............
Mannings 'n'.......
Channel Slope......
Channel Depth......
Bottom Z -Left Z -Right
Width (H:V) (H:V)
ft
Channel Channel Velocity
Depth Discharge fps
ft cfs
167.31 3.98
3.00
0.50
0.50
0.015
0.0005
6.00
Mannings Channel Channel Channel Velocity
'n' Slope Depth Discharge fps
fit /ft fit cfs
3.00 0.50 0.50 0.015 0.0005 6.00 134.61 3.74
Description: UPPER REACH-610 FT.
Solve For Discharge
Given Constant Data;
Bottom Width....... 6.00
Z- Left ............. 0.50
Z- Right............ 0.50
Mannings 'n'....... 0.015
Channel Slope...... 0.0005
Channel Depth...... 3.50
Bottom Z -Left Z -Right Mannings Channel Channel Channel Velocity
Width (H:V) (H:V) 'n' Slope Depth Discharge fps
ft ft /ft ft cfs
-------------------------------------------------------------------- - - - - --
6.00 0.50 0.50 0.015 0.0005 3.50 94.17 3.47
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Westminster Avenue Storm Drain Study Report
from Seal Beach Boulevard to Federal Storm Channel C01 S06
Appendix D - Engineering Cost Estimate
9 1 P a g e
ANDERSON PENNA
City of Seal Beach
Westminster Ave Channel
Engineering Estimate - Final Report Submittal
Construct Storm Drain along the Existing Channel Location
44rzots 2 os PM PWojedslSeal Beach=esImJhnw St - UanS dywepcd�Omate As
ITEM I
QUANTITY
UNIT
ENGINEER'S
UNIT COST
ENGINEER'S
COST
General Civil
1
Mobilization
1
LS
$10,000
$10,000
2 ISite
Clearinq & Grubbing Trees, gras s, roots
1
I LS
1 $20,0001
$20,000
3 ISWPPP
Preparation & Implementation
1
1 LS
1 $10,0001
$10,000
Channel Disposition
4
Removal of Existing Concrete Channel
1,155
CY
$60
$69,300
5
Removal of Existing Culverts & Headwall
1
LS
$5,000
$5,000
6
Utility Adjustments (Traffic Signals, pull boxes, etc.)
1
LS
$20,000
$20,000
7
Chain Link Fence and Gate Removal
100
LF
$25
$2,500
8
Protect Existing LWSB Wall/Footings
1
LS
$1,500
$1,500
9
Protect Existing Brid a Abutment
1
LS
$1,500
$1,500
Storm Drain
10
Junction Structure
4
EA
$7,500
$30,000
11
Manhole
4
EA
$5,000
$20,000
12
Inlets /Catch Basins
4
SF
$6,500
$26,000
13
Outlet Structure
1
EA
$30,000
$30,000
14
54" RCP & Bedding
1,992
LF
$300
$597,600
15
72" RCP & Bedding
1,419
LF
$400
$567,600
16
Extra Fill material
5,366
CY
$25
$134,150
17
Landscape Seeding
68,220
SF
$0.351
$23,877
Construction Subtotal $1,569,027
Contingencies 20% $313,805.40
GRAND TOTAL $1,883,000
44rzots 2 os PM PWojedslSeal Beach=esImJhnw St - UanS dywepcd�Omate As
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