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CAG -08 -180, Adden #2 -11
Discretionary Work Request for King County Road Services
FORM A
City of: renton Request Number: RN -026 Date: 08/25/2011
Problem Description: See attachment "A" for details of Describe Problem.
Nature of Request: Rehabilitate damaged culvert and replace the 2.5" x 6' grated inlet with a Type II
catch basin. See attachment "A" for details of the Nature of Request.
Location: Phase I site address: 4196 Lincoln Ave NE, Renton, WA Phase II site address: Located in
Monterey Ave NE right -of -way adjacent to 2005 NE 40th St., Renton WA.
Attachments: Engineering Design Budget
City Priority: High
Special scheduling requirements: In accordance with the approved HPA, the work within the ordinary
highwater mark of the stream must be completed by October 15, 2011. However, because of the
increased potential for precipitation by mid - October, it would be desirable to complete the in- stream
work no later than October 1, 2011.
City Project Manager - Telephone Number: Allen Quynn, 425- 430 -7247
Authorized By: Allen Quynn Date: 08/25/2011
Project #: Work Order #: Form B Sent to City Date: 09/21/2011
Recommended Action: County crews will rehabilitate the damaged culvert and replace the 2.5" x 6'
grated inlet with a Type II catch basin per request and 100% design plans /specs provided by the City. In
addition, the County will procure a contractor, approved by the City, that will line the culvert with resin
liner. See Attachment for details.
Proposed Schedule: By October 15, 2011
County Project Manager: Rick Schwartz
Cost Estimate: $56,200.00
Authorized By (City - $500):Allen Quynn Date: 9/28/2011
Comments: Engineering design plans and standard details will be sent through separate email to Rick
Schwartz.
http: / /your.kingcounty.govlkcdot /roads/ discretionary ldataentry.aspx ?m - -RN -026 09/28/2011
Attachment A
Problem Description:
As a result of heavy rains in December 2010, concentrated runoff from Lincoln Ave NE
saturated the slope of the embankment on the downstream side of an existing culvert, causing it
to partially fail above the culvert from the toe of the slope to the centerline of the road. The slide
broke away portions of the pipe and buried the outlet. To help stabilize the embankment, the
City Maintenance Division made temporary repairs by backfilling the road with gravel and
patching the damaged asphalt shoulder and southbound land. A section of 12" PVC pipe was
inserted inside the broken outlet and extends approximately 5 feet out to prevent any erosion of
the embankment from covering up the outlet.
The damaged culvert crosses Lincoln Ave NE approximately 800 feet south of NE 43rd PL and
conveys runoff across the road from the east half of Lincoln Ave and adjacent. The culvert is an
18" diameter concrete pipe constructed prior to 1994. The upstream end of the culvert is
connected to a Type II, 48" inlet structure with a birdcage trash rack.
Approximately 600 feet south and upstream of the culvert inlet structure at the south east corner
of NE 40th St. and Monterey PI SE is another overflow structure that collects runoff from a
stream. The structure is a concrete drop inlet structure with a 2.5" x 6' grated inlet. The outlet of
the structure is a 36" diameter, CPE pipe that crosses to the west side of Monterey PI NE to a
Type II CB with a bird cage trash rack. The pipe continues across Lincoln Ave NE before
discharging into a steam that flows north before merging with the discharge from the failed
culvert.
During the December storm event, this structure became clogged with debris, forcing the stream
to overtop the rim of the structure. It appears from inspection, that once the stream overtopped
the structure, it crossed over NE 40th St. and into a series of roadside ditches and driveway
culverts downstream along the east side of Lincoln Ave NE. The overflow likely exceeded the
capacity of the ditches /driveway culverts and continued across Lincoln Ave NE as concentrated
flow before reaching the top of the west embankment above the culvert described above. The
embankment became saturated, destabilizing it and causing it to fail, damaging the culvert.
Nature of Request:
The project consists of two phases. Phase I is to rehabilitate the damaged culvert and Phase II is
to replace the 2.5" x 6' grated inlet with a Type II catch basin. Specific work items are as
follows:
Phase I - Culvert
• Remove broken section of 18" concrete culvert and connect and lay to grade
approximately 19 feet of new CPEP using heat shrink wrap as shown on plans.
Insert resin liner and cure along full length of 18" culvert using cured in -place pipe
technology.
• Re -grade and compact slope on down steam side of culvert as shown on the plans.
• Stabilize slope with erosion control blanket and hydroseed disturbed area.
• Place 18" thick riprap pad at culvert outlet.
• Provide traffic control as necessary.
Phase II — 2.5' x 6' grated inlet
• Replace inlet with Type II , 54" Catch Basin with open curb face frame and grate as
shown on plans
• Install and connect approximately 5' of 30" CPEP to Type II, 54" Catch Basin as shown
on the plans.
• Install and connect 30" CPEP end section as shown on plans.
• Re -grade stream channel to match invert of proposed 30" RCP.
• Place 18" in depth loose quarry spalls as shown on plans.
• During construction install and maintain stream bypass as shown on plans.
• Provide traffic control as necessary.
Form B Attachment
Discretionary Request RN -026
Lincoln Ave NE and Monterey Pl NE Storm System Replacement Project
Form B —
Detailed Recommended Action:
Culvert and Catch Basin Work
Work to be performed by County crews:
➢ Rehabilitate the damaged culvert by performing the following tasks:
1) Remove broken section of 18" concrete culvert and connect and lay to grade
approximately 19 feet of new CPEP using heat shrink wrap as shown on plans;
2) Insert resin liner and cure along full length of 18" culvert using cured in -place
pipe technology;
3) Re -grade and compact slope on down steam side of culvert as shown on the
plans;
4) Stabilize slope with erosion control blanket and hydroseed disturbed area; and
5) Place 18" thick riprap pad at culvert outlet.
6) Provide traffic control as needed.
➢ Replace the 2.5" x 6' grated inlet with a Type II catch basin by performing the
following tasks:
1) Replace inlet with Type II, 54" Catch Basin with open curb face frame and
grate as shown on plans;
2) Install and connect approximately 5' of 30" RCP to Type II, 54" Catch
Basin as shown on the plans;
3) Install and connect 30" CPEP end section as shown on plans.
4) Re -grade stream channel to match invert of proposed 30" RCP;
5) Place 18" in depth loose quarry spalls as shown on plans; and
6) During construction install and maintain stream bypass as shown on plans.
➢ Provide traffic control as necessary in all phases of the Project.
Culvert Resin Liner by Contractor
➢ The County shall solicit bids from contractors per the design and specifications
provided by the City for the application of a resin liner for the culvert. The
County will be using the County's Small Purchase procurement process via the
three quotes process.
➢ If the lowest bidder meets the requirements under the County's procurement
process via the three quotes process, the County shall award and execute the
contract to the lowest bidder after approval by the City.
➢ The City and the County shall meet onsite prior to construction.
➢ The County shall provide all services for the administration of the contract.
• The City shall notify the County, in writing and in a timely manner, of any
changes it wishes to make in the plans and specifications. Any impacts to
the Project costs and schedule due to the implementation of the City's
changes in the plans and specifications shall be the City's responsibilities.
• The County shall not order or approve any changes in the approved Project
design which substantially change the nature of the Project or increase the
contract sum or change the schedule of the Project without first consulting
the City for approval.
➢ The City shall provide any necessary utility coordination.
➢ The County shall provide construction inspection for the contractor work
related to the resin liner; the City shall assign an inspector at all times during
the contractor work and the City's inspector shall advise the County, not the
contractor, of any deficiencies noted or of any matters regarding contract
performance.
➢ Final project acceptance shall be by the County after approval by the City of the
contractor work.
Detailed Cost Estimate:
➢ The total cost estimate of the Project is $56,200.00 per the details below. Per
Section 5 of the Interlocal Agreement between the County and the City for
Provisions of Services by the Road Services Division, the City shall pay for
actual costs for the services provided.
COST ESTIMATE
LABOR
$18,500.00
ER &R EQUIPMENT
$3,600.00
MATERIALS
$5,970.00
VENDOR EQUIPMENT
$1,500.00
CONTRACT
$20,580.00
TRAFFIC CONTROL
$1,600.00
15% Contingency
$4,450.00
TOTAL:
$56,200.00
LINCOLN AVE NE AND MONTEREY PL NE STORM
SYSTEM REPLACEMENT PROJECT
SWP -27 -3578
PROJECT STREET ADDRESS: 4196 Lincoln Ave NE, Renton, WA
2005 NE 40th St, Renton, WA
CHECKED FOR COMPLIANCE
TO CITY STANDARDS
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Date
SHT NO. DWG NO. TITLE
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2 C2 CULVERT REHABILITION AND .GRADING
3 C3 STREAM INLET MANHOLE AND PIPE
LOCATION MAP
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