HomeMy WebLinkAboutBREEZE THRU HEADQUARTERS - FDP190003 - SUBMITTAL DOCUMENTS - ROUND 2 - EROSION CONTROL LETTER/REPORT (3)1
Breeze Thru Headquarters
6464 South College Avenue
Fort Collins, CO 80525
March 20th, 2019
Prepared For:
Wenga, LLC
725 East Mulberry Rd
Fort Collins, Colorado 80524
Prepared By:
Baseline Engineering Corporation
112 North Rubey Drive, Suite 210
Golden, Colorado 80403
Noah Nemmers, P.E.
Job No. PL375
EROSION CONTROL
NARRATIVE
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CONSTRUCTION ACTIVITIES
STORMWATER MANAGEMENT PLAN
FOR
BREEZE THRU HEADQUARTERS
TABLE OF CONTENTS
INTRODUCTION ....................................................................................................................... 3
PROJECT DATA ........................................................................................................................ 3
1. Project Location ............................................................................................................... 3
2. Permittee and SWMP Administrator - Local Contact/Project Manager ............................. 3
3. Owner .............................................................................................................................. 3
4. Consultant ....................................................................................................................... 4
5. Acreage ........................................................................................................................... 4
6. Current Site Conditions (Project Site)............................................................................... 4
7. Project Description ........................................................................................................... 6
8. Placement of Water Quality BMP’s .................................................................................10
9. Permanent Stabilization ..................................................................................................10
10. BMP Maintenance...........................................................................................................10
REFERENCES .........................................................................................................................12
APPENDIX ................................................................................................................................13
A. VICINITY MAP
B. CONSTRUCTION GENERAL PERMIT
C. STORMWATER CONSTRUCTION SITE INSPECTION REPORTS
D. SWMP AMENDMENT LOG
E. SPILL PREVENTION AND CONTROL PLAN
F. CORRECTIVE ACTION REPORT
G. EROSION CONTROL PLAN (C1) AND DETAILS (C1)
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CONSTRUCTION ACTIVITIES
STORMWATER MANAGEMENT PLAN
FOR
BREEZE THRU HEADQUARTERS
INTRODUCTION
This report was prepared in compliance with Colorado Department of Public Health and Environment
(CDPHE) requirements for a Stormwater Management Plan. The essential data is tabulated in worksheet
format. Narrative sections are included where required.
PROJECT DATA
1. Project Location
Name of Project or Development: Breeze Thru HQ
Street Address: 6464 S. College Ave. Fort Collins, CO 80525
Township: 6 North, Range: 69 West, Section: 12, Quarter Section: SW
Latitude (+/- 15") 40°28’49”N, Longitude (+/- 15") 105°04’36”W
Metropolitan District: Trilby Corner
2. Permittee and SWMP Administrator - Local Contact/Project Manager
Name: Devon Smith
Company Name: Beacon Construction
Mailing Address: 902 West Drake Road, Unit 7
City, State, and Zip Code: Fort Collins, CO 80526
Phone Number: 970-212-2432 Cell: 970-290-6361
Email: devon@beacon-con.com
3. Owner
Name: John Agnew
Company Name: Wenga, LLC
Mailing Address: 725 East Mulberry Street
City, State, and Zip Code: Fort Collin, CO 80524
Phone Number: 970-485-0287
Email: silverwash@aol.com
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4. Consultant
Company Name: Baseline Engineering Corporation
Mailing Address: 112 N. Rubey Dr, Suite 210.
City, State, and Zip Code: Golden, CO 80403
Phone Number: 303-940-9966 ex. 215 FAX Number 303-940-9959
Project Engineer: Jesse Carano
Email: jesse.carano@baselinecorp.com
Cell: 617-803-1166
5. Acreage
A. Site Acreage: ±1.56
B. Acreage subject to disturbance: ±0.59
Calculations include all areas proposed for contractor laydown, materials storage, equipment
storage, and areas where equipment repair and fueling will occur.
6. Current Site Conditions (Project Site)
A. Past Land Use: (may be for partial site)
i. Known Landfill site: YES NO
ii. Has any of the following activities occurred on site:
(a) Metal Refining YES NO
(b) Petroleum Refining YES NO
(c) Petroleum Storage YES NO
(d) Chemical Manufacturing YES NO
(e) Pesticide/Fertilizer Manufacture/Storage YES NO
(f) Rail Yard YES NO
iii. If the response to any of the above is Yes, Please describe.
B. Possible Site Contamination:
i. Known Radium Site: YES NO
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ii. Known Toluene Site YES NO
iii. Known Superfund Site YES NO
iv. Known CERCLA Site YES NO
v. Known RCRA Site YES NO
vi. If the response to any of the above is yes, Please describe.
vii. Describe any other known site contamination: No other known contamination on the site.
C. Current Land Use:
i. Describe existing use: Educational space for hair salon professionals
ii. Are there any building/structures on site? YES NO
D. Existing Topography
i. Describe: The entire site slopes Southwest to Northeast
ii. Highest elevation: 5021 feet (Southwest Corner of the site)
iii. Lowest elevation: 4999 feet (Northeast corner of the site)
iv. Steepest Slope: 11.5%
v. Location: East side of site.
vi. Average Slope: 5.5%
vii. Direction: Northeast
E. Vegetation
i. Identify the types of vegetation found on-site: The project area is almost entirely
impervious. Some native grasses, a tree, and shrubs exists at the east property line.
ii. Estimate the existing vegetative ground cover on site: <5%
F. Drainage
i. Identify all areas tributary to the site: The site receives some runoff from the property
directly to the south via surface flow.
ii. Identify the State Receiving Waters: Fossil Creek Reservoir via Fossil Creek
iii. Describe the flow routing from the site to the Receiving Waters: Runoff is collected and
conveyed in gutters and roof drains to grade. Runoff surface flows SW to NE over asphalt and
ultimately reaches a drainage ditch on the east edge of the site. Flows are conveyed in the
this drainage way to the northeast ultimately reaching Fossil Creek.
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iv. Are there any springs or seeps located on-site? YES NO
v. Are there any defined drainage channels on-site? YES NO
vi. Does the site fall within a Regulatory Floodplain? YES NO
G. Wetlands
i. Identify all on-site wetlands/wetlands channels: Wetland / Drainage way off-site at the east
property line.
ii. Define the dimensions/surface areas for each identified wetland area.
iii. Tributary or adjacent Wetlands Areas
(a) upstream of the site? YES NO
(b) downstream of the site? YES NO
iv. Will the proposed construction work impact any of the on-site wetland areas?
YES NO
H. Soils
i. Identify the predominant Hydrologic Soil Group found on site.
A B C D
ii. What is the runoff coefficient for the undeveloped site C5=0.71, C100=0.82
iii. Describe the soil texture found on-site. Hedlt Clay Loam
iv. Is there any outcropping of bedrock on site? YES NO
v. Will grading or excavation on site reach bedrock? YES NO
If Yes, what is the depth of the bedrock?
vi. Will grading or excavation penetrate the Water Table? YES NO
vii. If Yes, what is the depth of the Water Table?
I. Erosion Potential
The erosion potential for the site soils is minimal. Construction BMP’s will be erected prior to
site disturbance and remain in place until permanent vegetation/stabilization is established.
Excess soil will be hauled off.
7. Project Description
A. Proposed Construction
i. Identify which of the following activities will occur during development of the site:
(a) Clearing and Grubbing YES NO
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(b) Mass Overlot Grading YES NO
(1) Cut Operations YES NO
If yes, estimate volume of cut (cubic yards) 80
(2) Fill Operations YES NO
If yes, estimate volume of fill (cubic yards) 0
(c) Building Demolition YES NO
(d) Foundation Excavation YES NO
(e) Utility Construction YES NO
(f) Street Construction and Paving YES NO
(g) Building Construction YES NO
(h) Parking Lot Construction/Paving YES NO
(i) Landscaping YES NO
ii. Will Storm and Sanitary Sewer systems be constructed as Public Sewers?
Sanitary: YES NO Storm: YES NO
B. Construction Scheduling
Phase I
i. Demolition
(a) Proposed Start Date 4/19
(b) Proposed Completion Date 5/19
Phase II
i. Grading and Shoring Operations
(a) Proposed Start Date 5/19
(b) Proposed Completion Date 6/19
ii. Utility/Infrastructure Construction
(a) Proposed Start Date 6/19
(b) Proposed Completion Date 7/19
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iii. Building Construction
(a) Proposed Start Date 7/19
(b) Proposed Completion Date 9/19
iv. Landscaping/Site Stabilization
(a) Proposed Start Date 9/19
(b) Proposed Completion Date 10/19
C. Construction Phasing
Phase I
i. Demo Operations
There are areas of existing concrete and asphalt pavement that will be sawcut or removed
to accommodate site grading, tie-in of new asphalt pavement, water and sanitary
connections, and landscape islands. A sign and large planter will also be removed at the
site’s frontage.
Proposed BMPs:
• Street Sweeping*
• Perimeter Control *
• Portable Toilets
• Sediment Control Logs
• Vehicle Tracking Control
• Concrete Washout Area
*See below for maintenance schedule
Phase II
i. Grading Operations
Clearing and grubbing to remove any existing vegetation at the east edge of the site will
occur first. Topsoil will be stripped and stockpiled on site. Rough grading will then be
completed for the garage addition at the east edge of the site. Final grading will be
performed for ADA stall re-grading and garage foundation prior to foundation construction.
BMP’s are installed where and when applicable, dependent upon the phase of construction,
prior to the beginning of grading operations.
Proposed BMPs:
• Vehicle Tracking Control *
• Spill Prevention/Containment *
• Street Sweeping *
• Sediment Control Log
• Perimeter Control *
*See below for maintenance schedule
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ii. Utility/Infrastructure Construction
Wet utilities to be constructed on site include water, hydrant line, and sanitary sewer.
All of which are private. New curb and gutter throughout the site for new parking
islands and landscaped sections as well as a limited amount of concrete flatwork and
asphalt repaving.
Proposed BMPs:
• Vehicle Tracking Control *
• Site Stabilization *
• Spill Prevention/Containment *
• Concrete Washout Containment *
• Street Sweeping *
• Perimeter Control *
• Sediment Control Log
• Soil Stockpile
*See below for maintenance schedule
iii. Building Construction
Vertical building expansion on the existing structure at the south central area of the site.
New building construction at the northeast corner of the site.
Proposed BMPs:
• Vehicle Tracking Control *
• Site Stabilization *
• Spill Prevention/Containment *
• Concrete Washout Containment *
• Street Sweeping *
• Perimeter Control *
• Sediment Control Log
• Soil Stockpile
*See below for maintenance schedule
iv. Landscaping/Site Stabilization
On site landscaping consists of mulch, shrubs, trees, grass, and cobble. Temporary and
permanent stabilization will be provided as necessary.
Proposed BMPs:
• Permanent Stabilization *
• Spill Prevention/Containment *
• Street Sweeping *
• Perimeter Control *
• Sediment Control Logs
• Rock Socks
*See below for maintenance schedule
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D. Detailed Construction Schedule
Please see Section 7.B above for construction scheduling.
E. Spill Prevention and Management
If fuel is stored on site, it will be stored in small quantities in designated areas out of the way
of construction traffic and construction activities. Construction and building materials will
be stored for short periods of time in relatively flat areas and covered when appropriate.
Paints, fertilizers, and any other liquids or fine grained soluble substances capable of
polluting stormwater discharge will be stored in the original containers in sheltered and
secure locations until time of use. Material wastes will be properly disposed of at approved
off-site landfills. Concrete chute wash-out sump areas will be provided on site for concrete
truck washout waters. The sump will be dewatered by evaporation and percolation.
F. Required Best Management Practices (BMP)
Silt fence will be installed along property limits of construction where flows and sediment
would impact adjacent properties. Paved surfaces will be swept in a timely manner when
sediment and other materials are tracked or discharged onto them. Maintenance of
erosion control measures shall comply with the criteria set forth in the Colorado
Department of Public Health and Environmental Guidelines (Reference-1). Site grading
operation will begin when erosion control measures are in place. When necessitated by dry
and windy conditions, fugitive dust will be controlled by watering exposed un-vegetated
areas.
All structural practices will be inspected once every week and after significant precipitation
events. Any degradation of structures described in the plan or excessive accumulation of
sediments will be remedied immediately upon discovery.
G. Construction Phasing
Final grading will be completed before paving of the site. Landscaping and irrigation
systems will be installed before final site stabilization.
8. Placement of Water Quality BMP’s
Water Quality will be placed according to civil construction plans. During construction, Sediment
Basins will be installed in grass swale area to aid in pollutant control.
9. Permanent Stabilization
The permanent final stabilization of the site will include asphalt paving of the new parking areas,
and landscaping of all areas exposed after paving operations have been completed.
10. BMP Maintenance
“Approved erosion and sediment control ‘Best Management Practices’ shall be maintained and
kept in good repair for the duration of this project. At a minimum, the Permittee or contractor shall
produce and retain weekly written inspection records for all BMPs and after significant precipitation
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events. All necessary maintenance and repair shall be completed immediately. Additionally, street
sweeping is to be completed by the close of the business day or (and) on an as needed basis throughout
the day. As the project expands, so will the monitoring of erosion control measures. This plan will
implement the following general requirements for construction:
i. The Engineer, Owner, and General Contractor, as well as representatives from governing
agencies shall make routine checks of all erosion control measures (listed above) to
determine if repairs or sediment removal are necessary. Due to conditions that may arise in
the field, additional control measures may be determined to be necessary but they shall be
reasonable and comply with standard engineering practices.
ii. After each significant precipitation event, erosion control measures are to be checked. If
repairs are needed, they shall be completed immediately.
iii. At all times during construction, erosion and sediment control shall be furnished and
maintained by the General Contractor.
iv. During construction, all structural practices will be inspected once every week. Any
degradation of structures described in the plan or excessive accumulation of sediments will
be remedied immediately upon discovery.
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REFERENCES
1. Colorado Department of Health & Environmental Guidelines, Denver, Colorado, May 1995.
2. Urban Storm Drainage Criteria Manual Volume 3, Colorado, March, 1969 (Updated January
2016).
3. Fort Collins Stormwater Criteria Manual, Fort Collins, Colorado, September, 2018
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APPENDIX
A. VICINITY MAP
B. CONSTRUCTION GENERAL PERMIT
C. STORMWATER CONSTRUCTION SITE INSPECTION REPORTS
D. SWMP AMENDMENT LOG
E. SPILL PREVENTION AND CONTROL PLAN
F. CORRECTIVE ACTION REPORT
G. EROSION CONTROL PLAN (CX) AND DETAILS (CX)