PROJECT SCOPE OF WORK CITY OF TOWN AND COUNTRY STORMWATER PROGRAM

Transcription

1 PROJECT SCOPE OF WORK CITY OF TOWN AND COUNTRY STORMWATER PROGRAM Project ID Number: 2-2 Problem: The backyards at 962, 97, and 978 Delvin Drive are located in a low area of shallow ponding that takes several days to dissipate after rains. Proposed Solution: A combination of improvements to the existing French drain/rain garden system behind ive and a new storm sewers may be necessary to convey runoff to the nearby storm sewers located at 982 Delvin Drive. Description of Proposed Alignment: At the upstream end of the improvements, replace approximately 7-ft of the existing French drain/rain garden system in the backyard of ive. Connect the French drain/rain garden system to a new area inlet at the west property line of ive. From the area inlet, install pipe sewer northwesterly to a new area inlet at the west property line of 97 Delvin. Continue with the pipe sewer northwesterly across the backyard of 97 Delvin Drive and connect to an existing area inlet at the shared property corner of 97, 986, and 992 Delvin Drive. Additionally, re-grade a swale to carry flow between the area inlets. Required Easements: ive (Temporary Construction Easement) ive (Permanent Easement) 97 Delvin Drive (Temporary Construction Easement) 97 Delvin Drive (Permanent Easement) 978 Delvin Drive (Temporary Construction Easement) 978 Delvin Drive (Permanent Easement) 986 Delvin Drive (Possible Temporary Construction Easement) 992 Delvin Drive (Possible Temporary Construction Easement) Commentary: The City provided a copy of a geotechnical report that documented remediation of a sinkhole in the area at the time of the subdivision development. Prior to constructing improvements in this area, a geotechnical investigation would be necessary. Depending on MSD review, water quality BMP s may be required to connect to their system. Additionally, hydraulic capacity of the existing system is unknown at this time and would have to be evaluated during final design. PROJECT SCOPE OF WORK

2 PROJECT INFORMATION SUMMARY CITY OF TOWN AND COUNTRY STORMWATER PROGRAM Project ID Number: 2-2 Number of Properties Impacted: Number of Easements Required: Number of Properties Benefited: Opinion of Probable Construction Cost (OPC): (LBI) Project Points: Cost to Benefit Ratio: Coordination Required: 6 $68, ,8 Project Source: x Citizen Complaint Municipality Government Agency Category of Problem: Description A: Frequent structural flooding from creeks or rivers (floodplain) B: Frequent structural flooding from overland flow (non-floodplain) C: Frequent roadway flooding x MSD x Corps of Engineers x MO DNR MODOT County Highways City s City Parks County Parks x Municipality: City of Town & Country Railroad: x : Local Utility Service Providers Attached Supplemental Information: x Project Scope of Work x Conceptual Plan Drawing x Itemized Opinion of Probable Construction Cost (OPC) x (LBI) Forms x Existing Condition Photos D: Infrequent structural flooding from creeks or rivers (floodplain) E: Infrequent structural flooding from overland flow (non-floodplain) F: Infrequent roadway flooding G: High risk structural erosion H: High risk roadway erosion x I: Yard erosion J: Moderate risk structural erosion K: Moderate risk roadway erosion L: or flooding of common ground or unmaintained area x M: Yard flooding N: from inadequate sinkhole O: from inadequate roadway drainage x P: of stormwater system facilities Q: Notes: The City provided a geotechnical report that documented remediation of a sinkhole in the area at the time of the subdivision development. Prior to constructing improvements, a geotechnical investigation would be necessary. MSD/MO American Water Base Map Number(s): FEMA FIR Map Number(s): 2O 2989CO64H PROJECT INFORMATION SUMMARY

3 OPINION OF PROBABLE CONSTRUCTION COST CITY OF TOWN AND COUNTRY STORMWATER PROGRAM Project ID Number: 2-2 ITEM ESTIMATED UNIT EXTENDED NUMBER PAY ITEM DESCRIPTION QUANTITY UNIT PRICE PRICE Mobilization Lump Sum $2,42.6 $2, Connection To Existing Inlet (2" thru 24" Pipe) Place $2,36. $2,36. 3 Excavation Class "C" 24 Cubic Yards $28. $, Compaction of Fill 42 Cubic Yards $22. $3,24. French Drain 7 Linear Feet $. $7,. 6 Inlet - Area Each $2,. $2,. 7 Pipe Sewer 2 Inch (Storm) 38 Linear Feet $9. $27,72. 8 Sodding - Fescue,667 Square Yards $. $9,7. 9 Adjust to Grade Each $2,. $2,. Yard Drain Each $,. $,. Protection and Restoration of Site Lump Sum $9,284.8 $9,284.8 SUB-TOTAL - CONSTRUCTION: $82, Estimated Engineering Fee: $7,. Estimated Geotechnical Engineering Fee: $2,. Estimated Property Survey/Strip Map Preparation Fee: $,. Estimated Property Title/Easement Search Report Fee: $2,. Estimated Topographic Survey Fee: $6,2. Estimated Property Rights Acquisition Document Preparation Fee: $2,2. Estimated Cost of Easements: $,. Estimated Construction Survey Fee: $. SUB-TOTAL: $29, % Contingency: $38,84.68 TOTAL: $68,3.62 OPINION OF PROBABLE CONSTRUCTION COST

4 Project Id Number: 2-2 ive Total Calculated :. ROW 3 Yard Subtotal 4 4 Yard Subtotal Swale / Berm Yard > / year Life / Limb / year Health. / years / years Multiplier Property Value Multiplier.

5 Project Id Number: Delvin Drive Total Calculated :.4 ROW Yard Subtotal Yard Subtotal Swale / Berm Yard > / year Life / Limb / year Health / years Property Value. / years Multiplier Multiplier.

6 Project Id Number: Delvin Drive Total Calculated :.6 ROW 2 Yard Subtotal 3 Yard Subtotal Swale / Berm Yard > / year Life / Limb / year Health / years Property Value. / years Multiplier Multiplier.

7 Project Id Number: Delvin Drive Total Calculated :.6 ROW 2 Yard Subtotal 3 Yard Subtotal Swale / Berm Yard > / year Life / Limb / year Health / years Property Value. / years Multiplier Multiplier.

8 Project Id Number: Delvin Drive Total Calculated :.6 ROW 2 Yard Subtotal 3 Yard Subtotal Swale / Berm Yard > / year Life / Limb / year Health / years Property Value. / years Multiplier Multiplier.

9 Project Id Number: Claymark Road Total Calculated :. ROW Yard Subtotal Yard Subtotal Swale / Berm Yard > / year Life / Limb / year Health / years Property Value. / years Multiplier Multiplier.

10 2-2 Yard inlet at west end of existing French Drain west side of ive. (27) Looking west from the west side of 962 Delvin Drive. (27) Looking east from the west side of 962 Delvin Drive. (27) Looking east along existing French Drain from the west side of ive. (27)

11 2O-47D 979 2O-S O-2S 2O-46D O-S 2O-2S 6 2O-S 99 2O-4D 36 V U 2O-23D 2O-3S 2O-98S O-8S 3 2O-S DELVIN 2O-4D 2 2O-4D 992 2O-37D D ELVIN D FEMA Flood Hazard Zone.2% Annual Chance Flood Hazard 2O-93S O-67D O-D TOWN AND COUNTRY LN O-48S Yard ponding. Proposed Solution Description O-49D $68,4 2,8 Storm sewer improvements to capture flow and improve yard drainage. 2O-23S 3 2O-92S 3 2O-97D Easements Required Properties Impacted Properties Benefited Project Conceptual Cost Cost to Benefit Ratio Problem Description 2O-98D 6 Topo Limits.% Annual Chance Flood Hazard Strip Map Limits Regulatory Floodway O-46S 2O-3D 94 R O-49S 2O-36D Proposed Improvements Stormwater Gravity Main Proposed 2O-S Stormwater Intake/Outfall Parcels 997 Stormwater Manhole Pavement CT 2O-4S 2O-42D 24 2O-22D 93 2O-39D Stormwater Inlet Impervious 2O-2S 9 2 2O-38D " ) Sanitary Gravity Main Stormwater Channel Sanitary Manhole # * 2O-9S 2O-43D, %, % 6 4 2O-S 2O-S 9 V U -ft Contours Existing 2O-24D O-48D O-D U V 9 Project Location 8 3 Feet inch = feet Warning: If this bar does not measure " then drawing is not to scale City of Town & Country Stormwater Program