Memorandum
City of Lawrence
Public Works
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TO: |
David L. Corliss, City Manager |
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FROM: |
Charles F. Soules, Director of Public Works |
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CC: |
Diane Stoddard, Cynthia Wagner, Casey Toomay, Mark Thiel, Mark Hecker, Ernie Shaw, Scott McCullough, David Cronin |
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DATE: |
July 2, 2014 |
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RE: |
RCP Trail |
The Development Agreement contains a cost estimate for the Natural Trails of $404,520.
On March 31st, KU Endowment provided the city with bid from Bliss Sports to construct the trails part of the Rock Chalk Park project.
Costs were as follows:
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Concrete trails - 1500 SY @ $40/yd |
$62,000.00 |
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Low water crossings - 3 @ $25,000/each |
$75,000.00 |
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Fire Pit |
$17,500.00 |
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Non-compacted crushed asphalt - 16,487 SY @ $15/yd |
$247,305.60 |
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Total |
$410.805.00 |
Staff Review of costs are as follows:
Concrete trails – The quantity of 1500 SY is 0.26 miles of 10' wide path. The unit cost of $40/yd. for 6" concrete shared-use path is the same as like bid item in development agreement. Staff agrees with the unit costs for approval, provided work meets city specifications.
Low water crossings – Information on work and materials to be used for crossing have not been provided to the city. Based on the city design submittal to regulating agencies for approval of the low water crossings the work will include: installation of three 36" diameter 20 foot long HDPE stormwater pipes at each low water crossing location. Both the up and downstream ends of each of the pipes will be mitered to conform to a 6" thick concrete encasement. Each low water crossing will carry a 10 foot wide multiuse path. Toe walls will be used on both the up and down stream pipe ends. In addition to the toe walls, riprap will be placed on the downstream end of each low water crossing.
The cost of $25,000/each is acceptable, based on meeting the city design information.
Fire pit – There is not a detailed design however discussions indicate that limestone will be used. The City has bid pricing for limestone blocks 18” wide at:
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Non-compacted crushed asphalt – The quantity of 16,487 SY is the approximate distance of trail located on City and KU Athletics property; 2.81 miles of 10' wide path. Additionally it has been proposed to construct 3267 SY of trail located on KU Endowment property; 0.54 miles of 10' wide path. The total amount of non-compacted crushed asphalt trail is now proposed at 19,755 SY (3.35 miles) for $247,305.60; based on this revised quantity the unit cost is $12.52/yd.
City staff has recently received a quote to install a similar asphalt milling trail along the river through Burcham Park. The quote was $5.85 SY for delivered and compacted asphalt millings.
City staff in April received a bid to install a 6" asphalt milling trail at the dog park - 1500 LF and 10' wide including grading at a total unit cost of $6.98/SY. These prices did not include subgrade work, estimated for this site, that cost would be approximately $3 per SY. An estimate of $10/yd. would place the cost of the non-compacted crushed asphalt at $197,000.
Due to the topography Bliss Sports has agreed to install an additional 1500 – 1600 SY of concrete trail on steep slopes at an estimated cost of $45,000 - $60,000.
The total costs for the Natural Trails is acceptable.
Action
Authorize notice to proceed for the RCP trails (the low water crossings will proceed pending state/regulatory department approvals).
Respectfully Submitted,
Charles F. Soules, P.E.
Director of Public Works
CFS/ch
Attachments: Map
Paul Warner Memo