HomeMy WebLinkAboutHANSEN FARM - FDP190010 - DOCUMENT MARKUPS - ROUND 2 - EROSION CONTROL LETTER/REPORTX
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ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
Hanson Subdivision
Stormwater Management Plan 3
In addition to the field survey, the Natural Resources Conservation Service (NRCS) Soil Survey was
used to determine existing soil types found on-site. According to the NRCS Soil Survey, the site
consists of Nunn clay loam and Caruso clay loam, which fall into Hydrologic Soil Groups C and D,
respectively. These groups have a low infiltration rate.
2.7 Existing Vegetation
The existing site vegetation consists primarily of native and non-native grasses. These grasses
naturally grow in clumps, which inevitably leads to some bare areas. The site has approximately
100% vegetative cover, which allows minimum ground erosion. It is highly recommended that pre-
construction photos be taken to clearly document vegetative conditions prior any disturbance
activities.
2.8 Potential Pollution Sources
As is typical with most construction sites, there are a number of potential pollution sources which
could affect water quality. It is not possible for this report to identify all materials that will be used
or stored on the construction site. It is the sole responsibility of the Contractor to identify and
properly handle all materials that are potential pollution sources. The following are some common
examples of potential pollution sources:
• Exposed and stored soils
• Management of contaminated soils
• Off-site tracking of soils and sediment
• Loading and unloading operations
• Outdoor storage of building materials, fertilizers, chemicals, etc.
• Vehicle and equipment maintenance and fueling
• Significant dust or particulate generating processes
• Routine maintenance activities involving fertilizers, pesticides, detergents, fuels, solvents, oils, etc.
• On-site waste disposal practices (waste piles, dumpsters, etc.)
• Concrete truck/equipment washing
• Non-industrial waste sources that may be significant, such as worker trash and portable toilets
• Uncovered trash bins
• Other areas or procedures where potential spills can occur
• Stockpiling of materials that can be transported to receiving waterway(s)
Management of Contaminated Soils: We are aware of on-site contaminated soils. A “Soils
Management Plan” has been provided by the National Inspection Services for this site which has
identified petroleum products, coal tar, and pitch and light oil, and municipal solid waste being
found in the site soil. Should the Contractor encounter any of these contaminants they are to use
the “Soils Management Plan” for proper procedures on handling of contaminated soils on the site.
Loading and Unloading Operations: As site development and building construction progresses,
space constraints will limit the number of on-site locations for loading and unloading activities to
the building from Perennial Lane. The contractor will be responsible for the proper handling and
management of pollution sources during loading and unloading operations.
Dedicated Asphalt and Concrete Batch Plants: Neither a dedicated asphalt or concrete batch plant
will be constructed on-site.
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TRACT E
FUTURE DEVELOPMENT
TRACT L
D&UE
TRACT D
FUTURE DEVELOPMENT
TRACT B
FUTURE PUBLIC PARK
TRACT F
DRAINAGE, UTILITY &
PEDESTRIAN ACCESS
EASEMENT TRACT K
D&UE
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CONSTRUCTION
FENCE
MU
ECB
Sheet
of 69
HANSEN SUBDIVISION These drawings are
instruments of service
provided by Northern
Engineering Services, Inc.
and are not to be used for
any type of construction
unless signed and sealed by
a Professional Engineer in
the employ of Northern
Engineering Services, Inc.
NOT FOR CONSTRUCTION
REVIEW SET
301 North Howes Street, Suite 100
Fort Collins, Colorado 80521
E NGINEER ING
N O R T H E RN
PHONE: 970.221.4158
www.northernengineering.com
( IN FEET )
0
1 INCH = 150 FEET
150 150 300 450
EC1
EROSION CONTROL PLAN
68
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
Call before you dig.
R
NORTH
1. IT SHOULD BE NOTED THAT ANY EROSION CONTROL PLAN SERVES ONLY
AS A GUIDELINE TO THE CONTRACTOR. STAGING AND/OR PHASING OF
BEST MANAGEMENT PRACTICES (BMPs) IS EXPECTED. ADDITIONAL AND/OR
DIFFERENT BMPs FROM THOSE ORIGINALLY DEPICTED MAY BE NECESSARY
DURING CONSTRUCTION DUE TO CHANGING SITE CONDITIONS OR AS
REQUIRED BY LOCAL AUTHORITIES.
2. THIS EROSION CONTROL PLAN IS SCHEMATIC IN NATURE. AS SUCH,
GRAPHICAL SYMBOLS MAY NOT BE TO SCALE, NOR ARE THEY
NECESSARILY SHOWN IN THEIR EXACT LOCATION.
3. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL PERMITTING (CITY,
STATE DISCHARGE PERMIT, ETC.) AND COMPLIANCE WITH GOVERNING
AUTHORITIES. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR (OR
PERMIT HOLDER) TO ENSURE EROSION CONTROL MEASURES ARE
PROPERLY MAINTAINED AND FOLLOWED.
4. CONTRACTOR SHALL IMPLEMENT THE APPROPRIATE EROSION CONTROL
MEASURES ACCORDING THE THE CONSTRUCTION SEQUENCING AND LEVEL
OF SITE STABILIZATION.
5. CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR
ALL STORM DRAINS, SWALES, PONDS AND RAIN GARDENS UNTIL SITE IS
FULLY STABILIZED.
6. CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR
DOWNSPOUT CONNECTIONS, TO THE STORM DRAIN SYSTEM, UNTIL
CONNECTION IS ESTABLISHED WITH DOWNSPOUT.
7. INLET PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO THE
SURROUNDING SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN
WATTLES FOR BARE SOIL OR GRAVEL SOCKS FOR PAVEMENT, ETC.)
8. CONTRACTOR IS RESPONSIBLE FOR STABILIZING ALL SLOPES,
PARTICULARLY THOSE STEEPER THAN 6:1. CRIMP MULCHING, HYDRO
MULCHING, EROSION MATS, TEMPORARY IRRIGATION, AND ADDITIONAL
WATTLES OR SILT FENCING MAY BE NECESSARY TO ESTABLISH
VEGETATIVE COVER AND STABILIZE THE SLOPE.
9. CONTRACTOR IS RESPONSIBLE FOR PREVENTING SEDIMENT FROM
UNSTABILIZED LANDSCAPE AREAS FROM MIGRATING ONTO AND ENTERING
THE PERMEABLE PAVER SYSTEMS UNTIL UPGRADIENT TRIBUTARY AREAS
ARE FULLY STABILIZED.
10. ADDITIONAL WATTLES, SILT FENCE, OR OTHER MEASURES, MAY BE
NECESSARY TO ENSURE THAT EACH BUILDING PAD IS STABILIZED
THROUGHOUT CONSTRUCTION. AT NO TIME SHALL SEDIMENT BE
ALLOWED TO CROSS THE PUBLIC SIDEWALKS.
11. CONTRACTOR SHALL IMPLEMENT APPROPRIATE PERIMETER PROTECTION
FOR AREAS DIRECTING DRAINAGE OFFSITE. PERIMETER PROTECTION
SHALL BE ADAPTED, AS NECESSARY, TO THE SURROUNDING SURFACE
TYPE AND CONDITION (i.e., STAKE-DRIVEN SEDIMENT CONTROL LOGS OR
SILT FENCE FOR BARE SOIL, SAND BAGS OR GRAVEL SOCKS FOR
PAVEMENT, ETC.)
12. FUELING FACILITIES SHALL BE LOCATED AT LEAST ONE HUNDRED (100)
FEET FROM NATURAL BODY OF WATER, WETLAND, NATURAL DRAINAGE
WAY OR MANMADE DRAINAGE WAY. THE FUEL TANKS AND FUELING AREA
MUST BE SET IN A CONTAINMENT AREA THAT WILL NOT ALLOW A FUEL
SPILL TO DIRECTLY FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF
WATER, WETLAND OR DRAINAGE WAY.
13. CONSTRUCTION WASTE STORAGE (DUMPSTERS) AND PORTABLE
SANITATION UNITS (CONSTRUCTION TOILETS) SHALL BE LOCATED AT
LEAST FIFTY (50) FEET FROM ANY STORMWATER INLET, WETLAND, OR
DRAINAGE WAY. SAID FACILITIES MUST BE SET IN A CONTAINMENT AREA
THAT WILL NOT ALLOW POLLUTANTS TO DIRECTLY FLOW, SEEP, RUN OFF,
OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE WAY.
DUMPSTERS SHALL BE LOCATED ON FLAT, STABLE GROUND, AND
CONSTRUCTION TOILETS SHALL BE STAKED DOWN.
14. THE CONTRACTOR AND ALL SUBCONTRACTORS WILL COOPERATE WITH
THE CITY'S CONSTRUCTION INSPECTORS BY CEASING OPERATIONS WHEN
WINDS ARE OF SUFFICIENT VELOCITY TO CREATE BLOWING DUST WHICH,
IN THE INSPECTOR'S OPINION, IS HAZARDOUS TO THE PUBLIC HEALTH AND
WELFARE.
15. WHERE SEASONAL CONSTRAINTS (E.G., DURING SUMMER AND WINTER
MONTHS) INHIBIT PERMANENT SEEDING OPERATIONS, DISTURBED AREAS
WILL BE TREATED WITH MULCH AND MULCH TACKIFIER OR OTHER
MATERIALS APPROVED BY EROSION CONTROL STAFF TO PREVENT
EROSION.
16. SEE LANDSCAPE PLANS FOR ADDITIONAL INFORMATION ON PLANTING,
REVEGETATION, HARDSCAPE AND OTHER PERMANENT SITE STABILIZATION
METHODS.
EROSION CONTROL NOTES:
NOTE:
ALL BMPS SHOWN ON THIS PLAN ARE GRAPHIC
REPRESENTATIONS ONLY. FINAL DETERMINATION OF SIZE
AND LOCATION SHALL BE DETERMINED BY THE CONTRACTOR
AND DOCUMENTED ON THE DYNAMIC SITE PLAN.
TABLE OF CONSTRUCTION SEQUENCE
AND BMP APPLICATION
Project: PATEROS CREEK
CONSTRUCTION PHASE MOBILIZATION DEMOLITION GRADING
BEST MANAGEMENT PRACTICES (BMPS)
STRUCTURAL "INSTALLATION"
Construction & Silt Fence Barriers *
Flow Barriers (Wattles) *
Inlet Filter Bags *
Rip Rap
Vegetative
Temporary Seeding Planting
Mulching / Sealant
Permanent Seeding Planting
Sod Installation
Rolled Products : Netting / Blankets / Mats
Contour Furrows (Ripping / Disking)
Sediment Basin
Rock Bags *
UTILITIES
INSTALLATION
FLAT WORK
INSTALLATION
VERTICAL
INSTALLATION LANDSCAPE DEMOBILIZATION
Vehicle Tracking Pad *
* All Temporary BMPs to be Removed once Construction is Complete
Other:
Any prior inlets that could use protecting
Any prior inlets that could use protecting
Anytime the site will sit dormant longer than 30 Days
Anytime the site will sit dormant longer than 30 Days
Anytime the site will sit dormant longer than 30 Days
LEGEND:
PROPOSED CONTOUR
PROPOSED STORM SEWER
PROPOSED SWALE
EXISTING CONTOUR
PROPOSED CURB & GUTTER
PROPERTY BOUNDARY
PROPOSED INLET
PROPOSED UNDERDRAIN UD
BENCHMARK/BASIS OF BEARING
BENCHMARK #1:
City of Fort Collins Benchmark 2-02:
Elevation= 4964.37
BENCHMARK #2:
City of Fort Collins Benchmark 16-01:
Elevation= 4956.98
Basis of Bearing
The Basis of Bearings is the East line of the Northeast Quarter of Section 7, as
bearing South 00°00'53" East (assumed bearing) as monumented on drawing.
WATTLE DIKE
INLET PROTECTION IP
VEHICLE TRACKING CONTROL PAD
VTC
SILT FENCE SF SF
ROCK SOCK RS
RIP RAP RR
1. CONTRACTOR SHALL IMMEDIATELY STABILIZE ALL DISTURBED SLOPES BY
CRIMP MULCHING OR SIMILAR METHODS. CONTRACTOR TO USE CDOT STRAW
MULCH SPECS UNLESS OTHERWISE DIRECTED.
2. SWMP ADMINISTRATOR:
Contact ________________________________
Company ________________________________
Address ________________________________
Phone________________________________
3. CONTRACTOR TO PROVIDE VEHICLE TRACKING CONTROL FOR CONCRETE
WASHOUT AREA IF ACCESS IS OFF PAVEMENT.
4. DRYWELLS AND BIORETENTION MEDIA TO BE INSTALLED AFTER STABILIZATION
OF OVERLOT GRADING.
5. ALL DISTURBED SOILS SHALL BE RESEEDED WITH A COVER CROP UPON
COMPLETION OF THE INFRASTRUCTURE IMPROVEMENTS. THE RECOMMENDED
SPECIES AND APPLICATION RATES OF PURE LIVE SEED FOR COVER CROPS
ARE AS FOLLOWS:
GREAT BASIN WILRYE 3LBS/ACRE
GREEN NEEDLEGRASS2LBS/ACRE
INDIAN RICEGRASS 1LBS/ACRE
SLENDER WHEATGRASS 2LBS/ACRE
THICKSPIKE WHEATGRASS 3LBS/ACRE
WESTERN WHEATGRASS 4LBS/ACRE
TRITICALE 10LBS/ACRE
WINTER WHEAT 5LBS/ACRE
6. REFER TO THE FINAL DRAINAGE AND EROSION CONTROL REPORT FOR
HANSEN PROPERTY DATED: APRIL 17, 2019 FOR ADDITIONAL INFORMATION.
GENERAL NOTES:
WD
TRAFFIC CONTROL BARRICADE TCB
CONCRETE WASH AREA CWA
SEDIMENT TRAP ST
CONSTRUCTION FENCE CF CF CF
LIMITS OF DISTURBANCE LOD
MULCH MU
Under slope stabilization rolled products. Reseeding may be required.