HomeMy WebLinkAboutENCLAVE AT REDWOOD - FDP220014 - SUBMITTAL DOCUMENTS - ROUND 6 - SUPPORTING DOCUMENTATION (5)Item Unit Quantity Unit Cost Total Cost
1 CY 24 $650.00 $15,600
2 EA 3 $20,000.00 $60,000
3 EA 1 $35,000.00 $35,000
4 LF 498 $18.00 $8,964
5 CY 10 $650.00 $6,500
6 SY 467 $15.00 $7,005
7 LF 22 $54.00 $1,188
8 EA 1 $920.00 $920
9 EA 1 $7,500.00 $7,500
10 Removal of Existing Forebay EA 1 $7,500.00 $7,500
11 LF 102 $20.00 $2,040
12 CY 60 $600.00 $36,000
13 CY 16,475 $4.00 $65,900
$254,117
$25,412
$280,000
Description
OPINION OF PROBABLE CONSTRUCTION COSTS
FOR
ENCLAVE AT REDWOOD POND INFRASTRUCTURE
January 31, 2024
Round Total
10% Contingency
Connect to Exisiting Infrastruture
Removal of Culvert Pipe (D<48")
15' Concrete Maintenance Trail for Pond Access (8" thick)
A. Redwood Pond
Concrete Spillover Weir (Steel Included)
Concrete Forebay
Outlet Structure
HDPE Channel Underdrain (8" Perforated Pipe)
2' Concrete Trickle Channel (Steel Included)
15" RCP
Detention Pond Subtotal
15" FES
North American P550 Turf Reinforced Mat
Earthwork (High-Range)
Note:
This Opinion of Probable Costs has been prepared using the best available data known to the engineer at the time the cost estimate was prepared and is provided for
informational purposes only. It is not a guarantee of project cost.
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SHEET NUMBER
ISSUE DATE:
DATE REVISION COMMENTS
DESIGNED BY:
CHECKED BY:
DRAWN BY:
PROJECT #:
1120 Lincoln Street, Suite 1000
Denver, Colorado 80203
P: 303.623.6300 F: 303.623.6311
HarrisKocherSmith.com
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201013
ENCLAVE AT REDWOOD
REDWOOD POND - PLAN ST51
140 OF 191
12-18-2023
AML
MAW
JMR
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KEY MAP
SCALE 1" = 500'
0
SCALE: 1" =
30 30 60
30'
GENERAL STORM NOTES:
1.THE CONTRACTOR SHALL NOTIFY COLORADO 811 PRIOR TO EXCAVATION, IN
ACCORDANCE WITH COLORADO STATE STATUTES.
2.THE LOCATION OF EXISTING UNDERGROUND UTILITIES IS APPROXIMATE AND
SHOWN ACCORDING TO THE BEST INFORMATION AVAILABLE, AS SUPPLIED BY THE
UTILITY OWNERS. PRIOR TO EXCAVATION, THE CONTRACTOR SHALL VERIFY
EXISTENCE, SIZE, AND LOCATION OF EXISTING UTILITIES AND IMMEDIATELY NOTIFY
HARRIS KOCHER SMITH OF ANY DISCREPANCIES. THE CONTRACTOR IS
RESPONSIBLE FOR ANY AND ALL DAMAGES TO EXISTING UNDERGROUND
FACILITIES.
3.PIPE LENGTHS ARE MEASURED FROM CENTER OF STRUCTURE TO CENTER OF
STRUCTURE FOR CYLINDRICAL MANHOLES AND TO THE INSIDE FACE OF INLETS
AND OTHER BOX STRUCTURES. PIPE LENGTHS ARE MEASURED TO THE END OF THE
STRUCTURE FOR ALL FLARED END SECTIONS.
4.STATIONING OF INLETS SHOWN IN STORM SEWER PROFILES IS AT CENTER OF
STRUCTURE.
5.ALL COORDINATES ARE AT THE CENTER OF THE STRUCTURE UNLESS OTHERWISE
INDICATED.
6.ALL PROPOSED STORM SEWER PIPE SHALL BE CLASS III REINFORCED CONCRETE
PIPE (RCP) OR ADS HP STORM - DUAL WALL POLYPROPYLENE PIPE IN ACCORDANCE
WITH CITY OF FORT COLLINS REQUIREMENTS, UNLESS OTHERWISE SPECIFIED IN
THESE PLANS
7.FOR ALL NON-CONCENTRIC MANHOLES, MANHOLE RINGS/COVERS AND STEPS LIDS
SHALL BE ROTATED AS SHOWN IN PLAN VIEW. ALL MANHOLES SHALL BE ECCENTRIC
UNLESS OTHERWISE NOTED ON PLANS.
8.ALL TYPE C & D INLETS SHALL HAVE CLOSE MESH GRATES.
9.CONTRACTOR SHALL ADJUST ALL EXISTING RIM ELEVATIONS TO MATCH THE
PROPOSED GRADE.
10.CONTRACTOR SHALL MODIFY INLET BASES AS NEEDED IN ORDER TO ENSURE ALL
STORM PIPES CONNECT PROPERLY TO THE INLET. CONTRACTOR SHALL PROVIDE
SHOP DRAWINGS FOR REVIEW AND APPROVAL BY ENGINEER, OWNER, AND
CITY/COUNTY PRIOR TO INSTALLATION.
11.CONTRACTOR SHALL PROVIDE ENGINEERED SHOP DRAWINGS, DESIGNED BY A
LICENSED ENGINEER, DETAILING THE STRUCTURAL DESIGN OF ALL POND
IMPROVEMENTS (FOREBAYS, ENERGY DISSIPATING BAFFLES, OUTLET
STRUCTURES, DIVERSION STRUCTURES, WALLS ETC.) FOR REVIEW AND APPROVAL
BY ENGINEERS, OWNER, AND CITY/COUNTY PRIOR TO INSTALLATION.
12.ANY SUBSURFACE DETENTION AND/OR WATER QUALITY SYSTEM DESIGNS SHOWN
ON THESE PLANS (IF APPLICABLE) ARE SPECIFICALLY LIMITED TO ELEVATIONS,
GRADES AND STORMWATER DETENTION AND/OR WATER QUALITY DESIGN
VOLUMES AND RELEASE RATES. THE DESIGN AND PROFESSIONAL ENGINEER’S
SEAL SPECIFICALLY EXCLUDES STRUCTURAL DESIGN (INCLUDING, BUT NOT LIMITED
TO, BUOYANCY CALCULATIONS AND CONSTRUCTION, TRAFFIC, OR OTHER
LOADING), DEWATERING, EXCAVATION, SHORING, AND MATERIALS AND BACKFILL
SPECIFICATIONS. IF THE PROPOSED SYSTEM UTILIZES A PROPRIETARY AND/OR
PRE-MANUFACTURED DETENTION AND/OR WATER QUALITY SYSTEM, THE OWNER
OR CONTRACTOR IS RESPONSIBLE FOR COORDINATING ALL REQUIRED SYSTEM
DESIGN, CALCULATIONS, MATERIALS AND BACKFILL SPECIFICATIONS WITH THE
UNDERGROUND DETENTION AND/OR WATER QUALITY SYSTEM MANUFACTURER
AND/OR SUPPLIER. CONSTRUCTION OBSERVATION BY THE MANUFACTURER'S
REPRESENTATIVE IS ESSENTIAL FOR PROPER INSTALLATION OF UNDERGROUND
DETENTION AND/OR WATER QUALITY SYSTEMS. AT A MINIMUM, THE INSTALLATION
SHOULD BE INSPECTED BY THE MANUFACTURER'S REPRESENTATIVE DURING
CONSTRUCTION AND ANY DEFICIENCIES OF THE INSTALLATION IDENTIFIED BY THE
MANUFACTURER'S INSPECTION SHOULD BE CORRECTED IMMEDIATELY.
13.ALL PUBLIC STORM SEWER LINES TO BE INSPECTED BY THE CITY OF FORT COLLINS.
ALL PRIVATE STORM SEWER LINES TO BE INSPECTED BY DEVELOPER.
14.WHERE REQUIRED, UTILITY CROSSINGS SHALL BE ENCASED PER CITY OF FORT
COLLINS STANDARDS. SEE FORT COLLINS STANDARDS FOR DETAILS.
15.TYPE R STORMWATER INLETS GREATER THAN 5 FEET IN LENGTH ARE REQUIRED TO
HAVE 2 ACCESS POINTS WITH COVERS, AND INLETS GREATER THAN 20 FEET IN
LENGTH SHALL HAVE 3 ACCESS POINTS WITH COVERS. ONE COVER SHALL BE
INLINE WITH THE OUTLET PIPE.
16.ALL STORMWATER MANOLE AND INLET COVERS MUST BE STAMPED WITH “NO
DUMPING DRAINS TO RIVER”.
17.PEDESTRIAN FRIENDLY MANHOLE COVERS SHALL BE ADA COMPLIANT WITH
NON-SLIP COVERS MEETING FOR COLLINS UTILITY SPECIFICATIONS IN THE
DEVELOPMENT CONSTRUCTION STANDARDS MANUAL. THE NEENAH R-1706-1 SOLID
HEAVY-DUTY LID OR APPROVED EQUAL WILL BE ACCEPTABLE.
PROPOSED DETENTION POND SUMMARY TABLE
POND ID SWMM
BASIN ID
TRIBUTARY
AREA IMPERVIOUSNESS ALLOWABLE
RELEASE RATE
MODELED PEAK
RELEASE RATE
POND
VOLUME
POND
VOLUME
WQCV
WSEL
2-YEAR
WSEL
100-YEAR
WSEL
(-)(#)(AC)(%)(CFS)(CFS)(CF)(AF)(FT)(FT)(FT)
POND1 113_21 3.23 58.9%0.65 0.62 82211 1.89 N/A 4956.04 4958.76
UD2 113_22 6.95 55.3%1.39 1.34 60838 1.40 N/A 4951.79 4956.60
POND3 113_23 8.50 50.4%1.70 1.61 345595 7.93 N/A 4955.25 4958.63
REDWOOD*113_24 70.12 63.6%13.05 12.35 569837 13.08 4956.60 4957.15 4960.41
*REDWOOD POND IS A REGIONAL DETENTION POND MANAGING MANY OFFSITE UPSTREAM AREAS. ALL INFORMATION IS TAKEN FROM THE
NECCO DESIGN REPORT AND/OR THE MASTER SWMM MODEL.