HomeMy WebLinkAboutWHITMAN STORAGE FACILITY II PDP AND APU - PDP130031 - CORRESPONDENCE - STORMWATER-RELATED DOCUMENTSJesse Schlam
From: Jesse Schlam
Sent: Friday, July 21, 2017 6:53 AM
To: 'Dennis Messner'
Cc: 'rhinnies@hotmail.com'; Sandy Lindell
Subject: RE: Lot 2, Whitman Storage Facility- Erosion Control Report
Attachments: Lot 2 Whitman Storage Facility Erosion Control Report 7-20-17 -JS .pdf;
Accomp_Doc.pdf; CheckList.pdf
Dennis,
The erosion control material you have submitted is incomplete and does not meet the Fort Collins Drainage Criteria
Manual's requirements.
I have attached my review materials (CheckList.pdf and comments on the submitted report from 7-20-2017) as well as a
copy of the guidance to meet the City's requirements (Accomp_Doc.pdf)
At this time the project will need to meet the requirements.
Once these Erosion Control Materials (report, escrow, and plan) are accepted, then the security escrow can be
deposited.
Once deposited the erosion control BMPs can be installed on the site and an initial inspection can be requested.
Once the initial inspection has occurred the hold on the building permit can be released.
I hope this clearly sets the remaining direction that is needed to proceed to start building.
Thank you,
Jesse
If you need anything else from me please let me know
Jesse Schlam, CFM
City of Fort Collins City of
Utilities:: Environmental Government Affairs Division: Fort Collins
Environmental Regulatory Specialist
(970) 218-2932 c.
(970) 224-6015 o.
ischlam(&fcnov.com
Erosion Control Requirements and Info may be accessed through
www.fcqovxorn/erosion
corn/erosion
Soil Amendment Requirements and Info may be accessed through
www.fcqov.corn/soi1-amendment
Building permit status and Development Projects may be accessed through Citizen Portal
h ttp://am os. fcaov. com/CitizenAccess/
Tell us about our service, we want to know
-----Original Message -----
From: Dennis Messner[mailto:dennismessner45@smail.com)
City of Erosion Control Report and Drawings
Fort Collins p g Whitman Storage Facility
Submittal Requirements Check Sheet Review 7-21-2017
Erosion Control Report
❑Written Analysis of the site including...
❑Current Developed Conditions
❑Detailed and Site Specific
[-]Existing Percent Vegetation
❑Nature and Purpose of Construction
[-]Detailed and Site Specific
❑Total Disturbed Area (Onsite and Off)
❑Closest Receiving Waters (Path to those waters)
❑Rainfa4l trod-ibi!ity8-Erosiefl-Sediment Control Methods
❑Analysis of Temporary & Permanent Mitigation
Methods
❑Timing (Phases) & Sequence of BMP Installation
❑Sequence Chart ...or...
❑ Separate Sheets for each sequence
❑Choice of BMPs to minimize sediment transport
❑Source of Non Stormwater Discharge
❑ Extra Site, Data
(Soil Boring/Lab Tests/Groundwater Levels)
❑Stormwater Management Controls (SWMC)
❑Description of all SWMC
❑Appropriate & Priority of all SWMC
❑Identify the SWMP Administrator
[-]Identify Potential Pollutant Sources
(Identify and Describe the Means of Control)
❑Disturbed and Stored Soils
❑Vehicle tracking of sediment
❑Management of contaminated soils
❑Loading and unloading operations
❑Outdoor storage activities
❑Equipment maintenance and fueling
[:]Significant particulate generating
❑Routine maintenance activities
❑On -site waste management
❑Concrete washing
❑Dedicated asphalt or concrete batch plants
❑Non -industrial waste sources (worker trash and
portable toilets)
[]Other potential spills
❑Dry land vegetation
❑Soil Types
❑Seed Mixes
❑Soil Amendments
❑Mulches
❑Detailed sequence of construction activities
❑Sequence of all land disturbing activity chart
❑Categories such as: Soil Stockpiling; Drainage Facility;
Maintenance activities; Sediment basins; temporary
channel stabilization; Seeding; Mulching; etc...
❑ Report Redlines have been corrected from prior submittal
❑ N/A
Jesse Schlam
Erosion Control Plans
❑Clear and uncluttered plans
❑General Location Map
022"x34" Drawing
❑Scale 1"=1000'to 1"=8000'
❑Must identify any major construction along the drainage
Ditches, Extended Detention, Culverts, Storm sewers...
❑Basins Divided into Topography
❑Erosion Control Plans
❑22"x34" Drawing
❑Scale 1"=20' to 1"=200'
❑Sequence Plans indicating timing, extent and location, of
the temporary BMPs
❑Standard construction details and notes of erosion and
sediment control measures
[]Job -specific construction details and notes of erosion and
sediment control measures
❑List vegetative specification from either Urban Drainage
Manual, or alternative sources.
❑List structural specification from the Urban Drainage
Manual, or other specifications and a justification if an
alternative is sought after.
❑A construction detail for ALL proposed construction BMPs.
❑The 'standard erosion and sediment control notes' are
included on the plan set.
❑ Plan Redlines have been corrected from prior submittal
❑N/A
Erosion control security calculations
❑ BMP Amount Calculated
❑AII BMPs Calculated
❑Estimated Quantity and Price are realistic
❑1.5 Times the estimated BMP controls
❑ Reseeding Amount Calculated
❑AII Disturbed Area Calculated
El Estimated Area and Price are realistic
❑1.5 Times the estimated reseeding
❑ Higher of the BMP, Reseeding, or Minimum Selected
(Final Erosion Control Number needs to be sent to City Engineer
for the Project in order to be reflected in the Development
Agreement)
❑Escrow Redlines have been corrected from prior submittal
❑ NIA
JS 6/2015
„c1of
F�6rt`'
Re: Erosion Control Report and Drawings Requirements Accompanying Document
This document was created to help engineers and other design staff to better understand, meet
and exceed the erosion control requirements listed in the "Fort Collins Stormwater Criteria
Manual”. The following portion of the document has the exact code that was recently passed by
Ordinance No. 174, 2011. The "black standard type", is the code word for word, and the
accompanying comments, written in "blue and italicized type" is to explain a simplified version
of what is expected from the code. Following these comments should facilitate quicker
processing of the material and having the materials accepted by the city in order to start building
sooner.
Volume 3, Chapter 7
1 3 3 PDP Erosion Control Report and Drawings Submittal Requirements with Comments
Erosion Control Report and Plans are required at time of PDP Submittal.
(Both documents MUST be submitted)
The Erosion Control Report must contain or comply with the following:
a. A written analysis of the area proposed for construction in reference to developed
conditions, rainfall erodibility, and proposed rainfall erosion and sediment control
methods. Control of rainfall erosion and sediment transport shall be analyzed in a
manner that clearly demonstrates an understanding of how temporary and permanent
mitigation methods will be used, including a discussion of the timing of construction
phases and the sequential installation of all erosion and sediment control Best
Management Practices (BMPs) proposed in the plan.
(This section will focus on clearly defining the prior conditions of the site and to
clearly define the nature and purpose of the construction activities that will be
occurring on site: the description should be well detailed and very site specific;
including such details as existing percent vegetation ground cover; estimates of total
area of the site; estimates of expected disturbed area by clearing, excavating,
grading; and outlining the closest receiving waters of the state and the path of travel
to those waters. Also the phasing and sequential installation should encompass a
detailed explanation of the phasing choices along with how these choices will
minimize sediment transportation. This is also the section to disclose any anticipated
allowable sources of non stormwater discharges, or any other existing relevant data
(i.e. soil boring/lab tests/groundwater levels) to the site.)
b. Stormwater Management Controls:
Include a description of all stormwater management controls that will be
implemented as part of the construction activity to control pollutants in stormwater
discharges. The appropriateness and priorities of stormwater management controls
should reflect the potential pollutant sources identified at the facility. The description
of stormwater management controls should address the following components, at a
minimum:
Fort Collins
i.) Identify SWMP Administrator: Identify a specific individual(s), position,
or title that is responsible for developing, implementing, maintaining, and
revising the SWMP. This designated individual(s) should address all
aspects of the facility's SWMP.
(This should include the responsible parties for all 4 of the SWMP needs,
but the maintenance is a must for communicating immediate correction to
the site, including phone, fax, address, and/or email.)
Identification of Potential Pollutant Sources: Identify and describe
sources that may contribute pollutants to runoff, and provide means of
control through BMP selection and implementation. At a minimum,
evaluate each of the following potential sources of pollution: (these are
not the only sources, please add any that apply)
1. All disturbed and stored soils;
Provide the area disturbed and location of the stockpile, along with the
other structural and non structural practices to minimize erosion and
sediment transportation.
2. Vehicle tracking of sediments;
This is a major potential pollution source and should identify a very
detailed management control, not just a trackingpad. Examples are
sweeping and scraping activities, as well as identifying and protecting the
closest inlet to the tracking location, other examples could be, minimizing
site access, street sweeping, gravel parking, paved area restriction for
vehicles, wash racks, education, etc...
3. Management of contaminated soils;
Identify if there are any contaminated soils and where they are located,
stored and disposed of.
4. Loading and unloading operations;
Describe the site's traffic operations and any steps taken to minimize the
movement ofsoil from the site. i.e. having contractors parking on
sidewalks as opposed to on the lot itself.
5. Outdoor storage activities (building materials, fertilizers, chemicals,
etc.);
Describe cleanup procedures and possible secondary BMPs that could be
applied to the storing of materials.
6. Vehicle and equipment maintenance and fueling;
Describe procedures that deal with repairing equipment in the least
detrimental way possible while on site.
7. Significant dust or particulate generating processes;
City of
Fort Collins
Describe the processes that will be used to minimize the dust or other
particulates from being released into the air.
8. Routine maintenance activities involving fertilizers, pesticides,
detergents, fuels, solvents, oils, etc;
Describe the maintenance procedures that deal with possible pollutants in
the least detrimental way possible while on site.
9. On -site waste management practices (waste piles, liquid wastes,
dumpsters, etc.);
Provide the location of the waste material stockpile and possible BMPs to
be used; these should be located a minimum of 50ft from any inlet
structures or watercourses.
10. Concrete truck/equipment washing, including the concrete truck chute
and associated fixtures and equipment;
Provide the location of washouts and describe the BMPs to be used to
eliminate possible pollutants from leaving the site, these too should be
located at least 50ft from any inlet structures or watercourses.
11. Dedicated asphalt and concrete batch plants;
If there is not to be one of these plants on site, clearly say there is no batch
plant on site.
12. Non -industrial waste sources such as worker trash and portable toilets;
and
Provide the location of these sources; these too MUST be located a
minimum of 50ft from any inlet structures or watercourses.
13.Other areas or procedures where potential spills can occur.
This might be where groundwater and stormwater dewatering practices
would be described.
**Note, there should be a detail sheet of all the employed BMPs included in this
section * *
c. For the establishment of dryland vegetation, the discussion must include soil types,
seed mix, soil amendments, and mulches.
These are just one form of practices used to achieve final stabilization, please
describe any other final stabilization practices used on the site in this section.
d. Detailed sequence of construction activities must be submitted as part of the erosion
and sediment control plan. The plan identifies the sequence for all the major
construction and erosion and sediment control activities, including overlot grading,
soil and aggregate stockpiling, construction of permanent drainage facilities, and
maintenance activities. The construction sequence will be used as a basis for
Fo i Collins
inspection of construction sites for compliance with the erosion and sediment control
plan.
This Is a sequence of construction activities chart and or descriptions to be included
in the report itself.
The sequencing plan must clearly indicate the timing, extent and location where
temporary BMP measures are installed and/or removed, depending on the type of
construction activities undertaken, e.g. site grading, utilities installation, paving,
flatwork, or vertical construction.
This is actually multiple pages of drawings that show progressive stages of the
construction site, as construction proceeds over time. The examples provided, are not
necessarily the only way to divide the evolution of erosion control needs on .site, but
are a good starting point. The main focus here is to show the inspector and the site
SWA1P Administrator the exact placement of BMPs as the site is being built out
overtime. This should help provide an idea to the contractors that these BMPs are not
a simple setup at the beginning and take down at the end. Erosion Controls need to
be dynamic as a site evolves.
The construction sequence must include at least the following:
These are to help with the sequence charts and descriptions, not the sequence plans.
1. Installation of temporary erosion and sediment control measures
2. Sequence of all land disturbing activity
3. Drainage facility construction
4. Sediment basins, temporary channel stabilization
5. Seeding
6. Mulching
7. Required maintenance activities (e.g. expected frequency of sediment pond
cleaning, after -storm checks of all BMPs, etc.)
e. Erosion control security calculations.
The Erosion Control Drawing must contain or comply with the following:
The Erosion Control Drawing should be the multiple page sequence plan.
The Erosion Control Drawing must use same base used for drainage study. The erosion
and sediment control plan may be combined with the grading plan, providing all the
required information can be shown, and the combined plan is not so cluttered with
information that all the elements cannot be readily seen and deciphered. All drawings
must be twenty-two by thirty-four (2204) inches in size. A General Location Map shall
be provided in sufficient detail to identify drainage flow entering and leaving the
development and general drainage patterns. The map should be at a scale of 1 " = 1000' to
1 " = 8000' and show the path of all drainage from the upper end of any off -site basins to
major drainage ways. The map must identify any major construction (i.e., development,
irrigation ditches, existing detention facilities, culverts, storm sewers) along the entire
path of drainage. Basins and divides are to be identified and topographic contours are to
Fort of
be included. The Erosion Control Plan drawings of the proposed development or
redevelopment must have a scale of 1 " = 20' to 1 " = 200' on 22" x 34" drawings.
These are clear enough but it says here that it may be combined with grading, it is a wise
suggestion not to clutter the erosion control drawings with too much information.
a) Standard and job -specific construction details of erosion and sediment control
measures, and standard and job specific erosion and sediment control notes.
These should not just be the standard notes block as added below, but should be
intensified to describe the more important details from the Erosion Control Report.
Remember, what is written here is what gets read by the contractor, and is easily
referred back to when questions arise.
b) List vegetative specifications from this Manual if standard vegetation is to be used.
Include alternate specifications and justification if they are to be used.
Please don't ask to reference Landscape plan, this should encompass a short but
thorough description of any temporary or permanent seeding BMPs, it would also be
great to show the location of these BMPs on the flatwork', or 'vertical construction'
sections of the sequence plans as these are the most ideal times to install these BMPs.
c) List structural specifications from this Manual if standards are to be used. Include
other specifications and justifications if they are to be used.
'This Manual ' refers back to the Urban Storm Drainage Criteria Manual Vol. 3.
d) A construction detail for all proposed construction BMPs.
Emphasis on detail for ALL construction BMPs, both: structural and non-structural,
temporary and permanent. Each type of BMP details should clearly explain:
installation requirements to guarantee correct application of the BMP, and the
maintenance requirements of these BMP as to correctly take care of these BMPs
(There should also be clear description of how to identify when a BMP needs to be
replaced due to 'wear and tear' and 'weathering'.) Permanent BMPs like Detention
Facilities, or Stormceptors, should include maintenance requirements for after
construction, that can be used to help prevent future problems to the effectiveness of
the BMP.
e) The following standard erosion and sediment control notes:
1. The City Stormwater Department erosion control inspector must be notified at
least 24 hours prior to any construction on this site.
2. All required BMPs shall be installed prior to any land disturbing activity
(stockpiling, stripping, grading, etc). All of their required erosion control
measures shall be installed at the appropriate time in the construction
sequence as indicated in the approved project schedule, construction plans,
and erosion control report.
3. Pre -disturbance vegetation shall be protected and retained wherever possible.
Removal or disturbance of existing vegetation shall be limited to the area
required for immediate construction operations, and for the shortest practical
period of time.
�t Collins
4. All soils exposed during land disturbing activity (stripping, grading, utility
installations, stockpiling, filling, etc.) shall be kept in a roughened condition
by ripping or disking along land contours until mulch, vegetation, or other
permanent erosion control is installed. No soils in areas outside project street
rights of way shall remain exposed by land disturbing activity for more than
thirty (30) days before required temporary or permanent erosion control (e.g.
seed/mulch, landscaping, etc.) is installed, unless otherwise approved by the
Stormwater Department.
5. The property must be watered and maintained at all times during construction
activities so as to prevent wind -caused erosion. All land disturbing activities .
shall be immediately discontinued when fugitive dust impacts adjacent
properties, as determined by the City Engineering Department.
6. All temporary (structural) erosion control measures must be inspected and
repaired or reconstructed as necessary after each runoff event and every 14
days in order to assure continued performance of their intended function. All
retained sediments, particularly those on paved roadway surfaces, shall be
removed and disposed of in a manner and location so as not to cause their
release into any drainageway.
7. No soil stockpile shall exceed ten (10) feet in height. All soil stockpiles shall
be protected from sediment transport by surface roughening, watering, and
perimeter silt fencing. Any soil stockpile remaining after 30 days shall be
seeded and mulched.
8. City Ordinance prohibits the tracking, dropping, or depositing of soils or any
other material onto city streets by or from any vehicle. Any inadvertent
deposited material shall be cleaned immediately by the contractor.
9. Additional notes can (should) be added to reflect the erosion/sediment control
plan of the individual development.
***There SHOULD be more than just these bare minimums
Sent: Thursday, July 20, 2017 10:33 AM
To: Jesse Schlam
Subject: Lot 2, Whitman Storage Facility -Erosion Control Report
Jesse,
Attached is the Erosion Control Report for your use.
Dennis R. Messner, P. E.
2015 Buena Vista PI.
Loveland, CO 80538
Office: 970-461-3501
Mobile: 970-402-4360
E-mail: DennisMessner45@gmail.com
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2
Dennis R. Messner, P. E.
Consulting Civil Engineer
July 18, 2017
Project No. 1032—GRD-13
PROPOSED SINGLE FAMILY RESIDENCE TO BE LOCATED ON LOT 29
WHITMAN STORAGE FACILITY, FORT COLLINS, COLORADO
I. EROSION CONTROL:
A. Development Regulations
1. The City of Fort Collins Storm Drainage Criteria, Volume III of the Urban Storm
Drainage Criteria Manual, and generally accepted erosion control methods were used
for evaluating the adequacy of any suggested erosion control plan.
B. Wind Erosion
1. The "Soil Survey" identifies the hazard of erosion as slight to moderate for the soil
type found on the site.
2. Certain measures shall be taken in the event that high winds are producing blowing
dust and causing possible wind erosion.
a. A mobile water truck will be made available in the event of high winds to
water down open and disturbed areas. Water spraying from the truck should be
dispersed in a uniform manner, while the soil should not be over -saturated so
that it would cause runoff to flow from the project site.
b. Other surface runoff control methods such as seeding and surface roughening
will also aid in wind erosion prevention.
c. Seeding of grasses or placing of sod and planting landscaping to reestablish
vegetation on the disturbed areas will reduce if not eliminate the effect of wind
erosion in the long term.
C. Structural Erosion Control
1. Erosion control considerations have been made based upon the short term, during
construction activities, and the long term, when development is complete.
2. The short term erosion control methods are being recommended in order to prevent
debris and sediment from flowing from the areas disturbed by construction activities
onsite to the adjacent roads, properties, and drainage courses.
a. Silt Fencing or Fiber Roll is to be placed along the north and south sides of
the site to capture waterborne sediment generated by grading and excavation
2015 Buena Vista Place Telephone (970) 461-3501 Loveland, Colorado 80538
activities. Silt Fencing will also be installed at the downstream side of the
building site.
b. Straw Wattle Dikes shall be placed at 150-foot intervals within the section of
the existing drainage swale located along the eastern boundary of the site until
seeding and re -vegetation takes place.
c. Straw Wattle Inlet Filter is to be installed around the existing detention pond
outlet structure located on Tract 'A' immediately south of the site.
d. A Concrete Washout Area is to be provided on the site.
e. Grading techniques such as surface roughing, scarifying, or discing parallel to
the surface contours should be used to temporarily stabilize soils that are
exposed during land disturbing activities.
3. The long term measures are to be incorporated to eliminate erosion after initial
construction activities have ended.
a. Landscape material and plantings.
b. Seeding of drought tolerant grasses in the lawn areas.
c. Permanent hard-scape installation on walks, drive, patio and planting beds.
4. The Owner shall warrant that the measures shown on the approved erosion and
sediment control plan are properly constructed, installed, and are free from defective
material and/or workmanship, for as long as construction on the site continues, or said
measures are necessary to protect against erosion and sediment transport.
H. STORMWATER QUALITY CONTROL:
A. Development Regulations
1. Volume III of the "Urban Storm Drainage Criteria Manual" is considered the
accepted authority for determining the appropriate measures to be implemented in
regard to stormwater quality control.
2. Since the site area to be disturbed is less than 1 acre, a Colorado Department of
Public Health and Environment (CDPHE) Stormwater Discharge Permit will not be
required.
B. Stormwater Quality BMPs
1. The large lot single family residential construction that is proposed will not produce
many of the pollutants commonly associated with urban development runoff, and
certainly not in large quantities. The most common associated pollutant from typical
rural developments is sediment which is transported in stormwater runoff to downstream
receiving waters. Emphasis will therefore be placed on improving stormwater quality
by limiting and removing sediment before it leaves the site.
a. The short and long term erosion control measures previously discussed will
reduce the sediment load of stormwater that exits the site.
b. The existing detention facility functions as an Extended Detention Basin,
(EDB), which is considered to be a structural Best Management Practice (BMP)
The pond provides a Water Quality Capture Volume (WQCV). This extends the
emptying time for the more frequently occurring storm events that are common
to the area. The WQCV is released through a perforated orifice plate based on a
40-hour drain time to remove a significant portion of the fine particulate
pollutants that can be found in urban stormwater runoff. The removal of
suspended solids and metals can be moderate to high, and the removal of
nutrients is low to moderate.
c. The long flow path over the existing grassed areas that runoff takes traversing
the site will allow sediment and particulate matter to filter and settle out prior to
even reaching the proposed stormwater quality and detention facility. This will
produce much of the same desirable affects that a "grass buffer' would have in a
more densely built urban setting.
d. All runoff from the proposed house, driveway and patio areas will first drain
onto lawn and then routed either overland or through drainage swales. The
grassed lined drainage swales are considered Best Management Practices
(BMP's) for removal of low levels of suspended solids. The long length, mild
slope, and low velocity during the minor storm event will aid in settling sediment
before stormwater even reaches the stormwater quality and detention facility.
Under good soil conditions and low flow velocities, moderate removal of
suspended soils and associated other constituents can be expected. Infiltration
during low flow velocities can remove low to moderate loads of soluble
pollutants, particularly during small frequently occurring storm events.
2. The seeding mixture for reestablishing vegetation on areas disturbed by construction
activities will be a drought tolerant mix as recommended in the City of Fort Collins
Storm Drainage Criteria. The drought tolerant seed mixture may also reduce the need for
chemical fertilizers or pesticides that could potentially pollute stormwater runoff from
the property.
a. Seeding in areas that are not irrigated should be restricted by the season. The
spring seeding season goes from the spring thaw to June 1. Fall seeding should
take place from September 1 until there is a consistent ground freeze. If seasonal
constraints prohibit seeding during these periods, mulch and mulch tackifier to
sloped areas should be applied until permanent seeding is possible.
b. Construction scheduling will be coordinated by the Contractor to limit the
amount of soil exposed during the irrigation season or annual periods of the
heaviest precipitation. The schedule should also consider the available plating
season to avoid having significant amount of exposed areas prior to the winter
season when planting opportunities are limited.
4. The potential hazard of stormwater contamination due to a spill of chemicals,
fertilizers, or fuels is not a great concern since storage of such materials will not be kept
or handled on the site in any significant quantity during construction activities.
a. Absorbents will be made available for use if fueling and lubricants are to be
handled and stored on the site.
b. Pollution prevention can be greatly enhanced by the use of good
housekeeping during construction. The Contractor will be responsible for the
practices of good housekeeping that involves keeping a clean, orderly site. Most
aspects of good housekeeping are common sense approaches to reduce the
potential for stormwater contamination. The methods include, but are not
limited to scheduled trash/construction debris disposal, providing drip pans for
equipment or machinery that have evidence of leaks, proper material handling
and storage, and disposal of waste lubricants and chemicals.
III. Conclusions:
A. Compliance with Standards
1. Proposed erosion and stormwater quality control measures conform to the
recommendations of the City of Fort Collins Storm Drainage Criteria and Volume III of
the Urban Storm Drainage Criteria Manual.
2. The Owner will not be responsible for the maintenance of the erosion and stormwater
quality control related measures.
1 BER ROLLS TO BE
INSTALLED ON THE
PERIMETER WHERE
ANY FLOWS MAY
ROLLS TO BE
LEAVE THESITE
LED AFTER
G IF STEEP
SARE
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HIGH POINT..`
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URB
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Of
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F
FIBER ROLLS TO BE INSTALLED
ON THE FRONT OF EACH LOT
-
AND THE SIDES OF EACH LOT STREE'
INLET PROTECTION TO BE
IF APPLICABLE
INSTALLED AT NEAREST
DOWNSTREAM INLET
PLAN VIEW
ISOMETRIC VIEW
NOTES:
I.FIBER RODS TO BE STAKED AS REQUIRED.
2. FlBER ROLLS TO REMAIN IN -PLACE UNTIL
VEGETATION IS ESTABLISHED.
CITY OF FORT COLLINS UTILITIES
�`'ns STORMIIATER CONSTRUCTION DETAILS
P.O. BOX 580, FORT COLUNS, CO. 80522
(970) 221-6700
EROSION CONTROL FOR
CONSTRUCTION ON INDIVIDUAL
RESIDENTIAL LOTS
DRAWN BY: T. COX
DATE DRAWN: 1/9/12
CAD FILE NAME: D52.d
DETAIL
D-52
Erosion Control for Construction on Individual Residential Lots
Sea c
The tollowing requirements apply to all single-family residential projects, including;
• New single-tamily residential construction
• New construction (i.e. additions, etc.) on existing single —fancily sites
• Idle single family lots both permitted and non -permitted (lots owned by the builder or land developer not yet under
construction).
• Grading, excavating and stockpiling of earth and landscape materials (not specifically limited to new construction) which
results in the transport of any of these materials off site by any means including, but not limited to, wind or water erosion
and vehicular tracking.
Enforcement
The requirements herein are enforced through the requirements of the Fort Collins Stormwater Criteria Manual, and applicable
ordinance. Failure to comply may result in the refusal of inspections, refusal of Certificates of Occupancy, and the suspension,
revocation, or cancellation of Building Permits.
Excavations for basements
When lots are ready for basement excavatiorts and / or additional grading, the BMPs that are protecting the lot shall not be
compromised during the operation. BMPs may be temporarily removed to allow for access and promptly reinstalled at the end of the
basement excavation and/ or grading operations, or at the end of the day- whichever is sooner. At no time shall the lot specific BMPs
be removed over night or during precipitation events.
Basement excavations grading shall not be performed on a lot(s) if excessive tracking of sediment onto streets will occur. This is
often the case after recent precipitation events, which cause the lot to be "muddy"
Material from basement excavations shall be contained and protected Gom sediment transport by surface roughening, watering and
perimeter silt fence or other approved BMPs. The excavated material shall comply with all stock pile criteria uufli ned in Furl Collins
Stormwater Criteria Manual, specifically, No stockpile shall exceed ten (10) feet in height, and any stockpile remaining after 30 days
shall be seeded and mulched.
It the excavated material is to be moved, and sediment is tracked onto streets, all sediment shall be removed immediately. The streets
shall be scraped and swept periodically throughout the day and at no time shall the material be allowed to remain on the street
overnight. All BMPs shall be reinstalled at the end of each day.
Inlet protection
Following the direction of flow off the site, the nearest inlet is required to have inlet protection, it shall be installed S maintained per
the Fort Collins Stormwater Criteria Manual requirements at all times.
Street'Sidewalk Sweenine
City ordinance prohibits the tracking, dropping or depositing of soils or any other material onto the city streets by or from any vehicle.
Any inadvertent deposited material shall be cleaned immediately by the contractor. Street sweeping shall be performed on a regular
basis. The frequency of sweeping will depend on construction activity, the amount of deliveries, the overall effectiveness /
maintenance of the BMPs, as well as "good housekeeping" practices. City of Fort Collins may request additional sweeping if material
is tracked onto streets. The street sweeping shall be completed within 24 hours of the request.
Maintenance of lot BMPs
Maintenance shall be performed on all lot AMPS on a routine basis and after all precipitation events that cause surface erosion,
reference the Fort Collins Stormwater Criteria Manual for proper specifications, installation, and maintenance requirements.
'Lots That are in sensitive areas, or conditions are such that the lot(s) cannot be permanently stabilized for an extended period of time,
may require the entire lot to be covered with erosion control blankets. This will be detetntincd on an individual lot basis.
•• When all required BMPs are installed and an initial inspection is needed please call the erosion control inspector at (970) 224-6015.
please notify at least 24 hours prior to any construction on this site. if any questions arise about the erosion control needs of a site, this
number should be used.
�U
�— NOTE: Construction access to be from W
scale: 1•-30' existing driveway located on Lot 1. %, {
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1002- GRO -17
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