PWKA Parkland Subdivision Report
Engineering/Building
Inspection
Memo
To: Public Works Committee
From: Sean E. McMullen
CC: Mayor Slocomb
Date: 2/15/2022
Re: Parkland Subdivision Drainage
Committee Members:
At the last Public Works meeting it was requested that a detailed cost estimate for the
repair/permanent treatment of the out lot areas for the Parkland Subdivision be created. I have
completed the detailed cost estimate for this work, which includes the following items:
1. Storm Sewer Installation of the drainage area North and South of Briargate Lane.
2. Concrete invert installation of the additional areas as identified by the enclosed map.
3. Permanent restoration of all disturbed areas.
There is approximately 300 lineal feet of Storm sewer that would need to be installed along the
Briargate Out lot areas to handle the storm flows, however an overland flow path would still
need to be established once the pipe was installed. The cost for this portion of the work is:
1. 27” Concrete Storm Sewer 300 L.F. $42.00 $12,600.00
2. Precast basins 2 each $1,100.00 $ 2,200.00
3. Asphalt Patch 25 S.Y. $ 55.00 $ 1,375.00
4. End Sections 2 each $425.00 $ 850.00
5. Restoration 1,000 S.Y. $ 3.50 $ 3,500.00
TOTAL $20,525.00
The second part of the proposed installation would include the installation of a 3 foot wide
concrete invert. The concrete invert would allow the low flow condition to pass without causing ponding
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or stagnant water in the area. The invert would also allow the high flow condition to pass easily and
wouldn’t act as an obstruction to the flow in the area. We have measure the actual area off of the 2003
Ortho-photo maps, and therefore the lineal footages are approximate. We have estimated the total
footage to be 3,200 lineal feet. Based on this footage, we have come up with the following cost
estimate.
1. Concrete Invert 3,200 L.F. $ 28.25 $ 90,400.00
2. Restoration 7,200 S.Y $ 3.50 $ 25,200.00
3. Survey Layout 1 L.S. $2,500.00 $ 2,500.00
4. Inspection Services 1 L.S. $13,000.00 $ 13,00.00
5. Contingency 15% $19,665.00 $ 19,665.00
TOTAL $150,765.00
The costs above do not include any easement acquisition, title policy work, appraisals, legal,
engineering, administration or bidding documents. Should the committee decide to proceed with the
work for the installation of these improvements, these items would need to be added to the total project
cost. The bidding and legal phase of the project is estimated to be approximately $12,000 to
$15,000.00, however a final number or estimate for the title work and land acquisition cannot be
determined until exact areas are known and the final square footages are determined.
Please feel free to contact me at this office if you have any further questions or comments regarding
this estimate.
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