PROJECT SCOPE OF WORK CITY OF TOWN AND COUNTRY STORMWATER PROGRAM

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Edmund Nicholson
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PROJECT SCOPE OF WORK CITY OF TOWN AND COUNTRY STORMWATER PROGRAM Project Name: 362 Featherstone Dr Project ID Number: 27-3 Problem: Anecdotal evidence suggests a natural spring exists in the

The City has installed 2-3 rain boxes in close proximity to the spring seepage in an attempt to store the water underground, with the outfall pipes connecting to the resident s private system.

1 PROJECT SCOPE OF WORK CITY OF TOWN AND COUNTRY STORMWATER PROGRAM Project Name: 362 Featherstone Dr Project ID Number: 27-3 Problem: Anecdotal evidence suggests a natural spring exists in the backyard of 362 Featherstone Drive. With heavy rains (3-4 times per year) water seeps out of the ground, dispersing along the backyard and eventually entering a creek. The City has installed 2-3 rain boxes in close proximity to the spring seepage in an attempt to store the water underground, with the outfall pipes connecting to the resident s private system. The first box was installed in the Fall of 26 and the later box(es) installed in the Spring of 27. The resident reported that while the rain boxes may give slight relief during smaller storms, minimal improvement is observed during larger events. The surfacing water has contributed to a sump in the yard, approximately 4-feet wide and 2-3 feet deep. The resident reports than sheet flow during a heavy rain event is often 2-inches deep, flowing through a large portion of the backyard. No reports of structural flooding are known. Proposed Solution: Installation of a dry creek bed will allow for the surfacing flow from the spring to have a protected flow path, decreasing the likelihood of surface erosion. Required Easements: 362 Featherstone Drive (Temporary Construction Easement) Commentary: There is an existing area inlet in the yard; MSD does not claim ownership. Project may be eligible for City of Town & Country Storm Water Maintenance Policy. PROJECT SCOPE OF WORK

PROJECT INFORMATION SUMMARY CITY OF TOWN AND COUNTRY STORMWATER PROGRAM Project Name: 362 Featherstone Dr Project ID Number: 27-3 Number of Properties Impacted: Number of Easements Required: Number

2 PROJECT INFORMATION SUMMARY CITY OF TOWN AND COUNTRY STORMWATER PROGRAM Project Name: 362 Featherstone Dr Project ID Number: 27-3 Number of Properties Impacted: Number of Easements Required: Number of Properties Benefited: Opinion of Probable Construction Cost (OPC): Location Benefit Identification (LBI) Project Points: $, Project Source: x Citizen Complaint Municipality Maintenance Government Agency Category of Problem: Description Cost to Benefit Ratio: 38,992 Coordination Required: MSD Corps of Engineers MO DNR MODOT County Highways City Streets City Parks County Parks x Municipality: City of Town & Country Railroad: x Other: Utility Service Providers Attached Supplemental Information: x Project Scope of Work x Conceptual Plan Drawing x Itemized Opinion of Probable Construction Cost (OPC) x Location Benefit Identification (LBI) Forms x Existing Condition Photos A: Frequent structural flooding from creeks or rivers (floodplain) B: Frequent structural flooding from overland flow (non-floodplain) C: Frequent roadway flooding 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: Erosion or flooding of common ground or unmaintained area x M: Yard flooding N: Flooding from inadequate sinkhole O: Flooding from inadequate roadway drainage P: Maintenance of stormwater system facilities x Q: Other Possible discharge from upstream sinkhole Other Notes: Project may be eligible for the City of Town & Country Storm Water Maintenance Policy. MSD/MO American Water Base Map Number(s): FEMA FIR Map Number(s): 2P4, 2P 2989C32K PROJECT INFORMATION SUMMARY

3 OPINION OF PROBABLE CONSTRUCTION COST CITY OF TOWN AND COUNTRY STORMWATER PROGRAM Project Name: 362 Featherstone Dr Project ID Number: 27-3 ITEM ESTIMATED UNIT EXTENDED NUMBER PAY ITEM DESCRIPTION QUANTITY UNIT PRICE PRICE Mobilization Lump Sum $469.9 $ Excavation Class "C" 3 Cubic Yards $28. $ Dry Creek Bed Stone Square Yards $2. $3,2. 4 Sodding - Fescue 4 Square Yards $. $,6. Protection and Restoration of Site Lump Sum $2,33. $2,33. SUB-TOTAL - CONSTRUCTION: $8,4.97 Estimated Engineering Fee: $,. Estimated Geotechnical Engineering Fee: $6,. Estimated Property Survey/Strip Map Preparation Fee: $. Estimated Property Title/Easement Search Report Fee: $4. Estimated Topographic Survey Fee: $2,. Estimated Property Rights Acquisition Document Preparation Fee: $4. Estimated Cost of Easements: $,. Estimated Construction Survey Fee: $. SUB-TOTAL: $38, % Contingency: $,697.9 TOTAL: $,689.6 OPINION OF PROBABLE CONSTRUCTION COST

4 City of Town & Country Location Benefit Identification Project Name: 362 Featherstone Dr Project Id Number: 27-3 Location Address / Description: 362 Featherstone Dr Total Calculated Benefit Points:.3 Evaluation Category Problem Type Benefit Points High Medium Low Public Structure Residential Structure Retaining Wall (Public) Street ROW Improved Channel Retaining Wall (Private) Drainage Structure 2 Yard 3 Unimproved Channel Erosion Other Erosion Subtotal 6 Public Structure Residential Structure Impassable Traffic Passable Traffic Accessory Structure Yard Flooding Other Flooding Subtotal Drainage Structure 2 Improved Channel Unimproved Channel Street Gutter Swale / Berm Other (Rain Boxes) 3 Maintenance Maintenance Subtotal Street Yard Drainage Other Drainage Subtotal Frequency Rating Degree of Risk > / year Life / Limb / year Health / years Property Value. / years Frequency Rating Multiplier Degree of Risk Multiplier.

5 27-3 Roof drain and underground storage box pipe outfall, looking northwest at 362 Featherstone, existing area inlet seen to left, ownership not claimed by MSD. (27)

27-3 Silt build-up in bottom of existing

diameter and 2-feet deep, concrete edge of

6 27-3 Silt build-up in bottom of existing area inlet, no pipes leading out seen. (27) Hole in yard on west portion of property, believed to be from a natural spring outfall. (27) Hole in yard, approximately 4-feet in diameter and 2-feet deep, concrete edge of underground storm box can be seen. (27) Sheet flow coming from hole in yard. (27)

Project Location 34 6 38 27 Existing 373 U V -ft Contours 36 FEATHERSTONE DR 2P-S 64 349, % Sanitary Manhole " ) Stormwater Inlet, % 3 #

Pavement '' 2P-4D Parcels Proposed Proposed Improvements Strip Map Limits Topo Limits FEMA Flood Hazard Zone 2'' Regulatory Floodway 4

% Annual Chance Flood Hazard 2P4-7S 3 3 ' ' 33'' 3 Proposed Solution Description 2P4-42S Install a dry creek bed to allow flow to have a

342 2 2P4-43S 2P4-44S 4 2 4 Feet inch = 4 feet Warning: If this bar does not measure " then drawing is not to scale City of Town &

7 Project Location Existing 373 U V -ft Contours 36 FEATHERSTONE DR 2P-S , % Sanitary Manhole " ) Stormwater Inlet, % 3 # * V U 4 Stormwater Manhole Stormwater Intake/Outfall Stormwater Gravity Main Stormwater Channel Impervious V U Sanitary Gravity Main Pavement '' 2P-4D Parcels Proposed Proposed Improvements Strip Map Limits Topo Limits FEMA Flood Hazard Zone 2'' Regulatory Floodway 4 2P-4S 4 2P-S 3 2P-46D '' 2'' 362.% Annual Chance Flood Hazard 2P4-7S 3 3 ' ' 33'' 3 Proposed Solution Description 2P4-42S Install a dry creek bed to allow flow to have a protected flow path P4-43S 2P4-44S Feet inch = 4 feet Warning: If this bar does not measure " then drawing is not to scale City of Town & Country Stormwater Program '' 362 Featherstone Dr 2 4 2P4-9D P4-S.3 $,69 38,992 A natural spring is believed to discharge in the yard, causing ponding and erosion. 33'' Easements Required Properties Impacted Properties Benefited Project Benefit Points Conceptual Cost Cost to Benefit Ratio Problem Description.2% Annual Chance Flood Hazard 27-3

PROJECT SCOPE OF WORK CITY OF TOWN AND COUNTRY STORMWATER PROGRAM

PROJECT SCOPE OF WORK CITY OF TOWN AND COUNTRY STORMWATER PROGRAM Project ID Number: 25-5 Problem: Stormwater collected from the neighborhood upstream is released at 9 Muirfield Lane and flows west toward