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DETAIL A
PROPOSED BUILDING
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PROPOSED CONCRETE VALLEY PAN
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DETAIL B
DETAIL C
DETAIL D
07/23/25
City of Fort Collins Approved Plans
Approved by:
Date:
Wes Lamarque
08/18/2025
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GENERAL EROSION CONTROL NOTES:
1)THE PROPERTY OWNER, OWNER'S REPRESENTATIVE, DEVELOPER, DESIGN ENGINEER, GENERAL CONTRACTOR,
SUB-CONTRACTORS, OR SIMILAR TITLE FOR THE DEVELOPING ENTITY (HERE AFTER REFERRED TO AS THE DEVELOPER) HAS
PROVIDED THESE EROSION CONTROL MATERIALS IN ACCORDANCE WITH EROSION CONTROL CRITERIA SET FORTH IN THE MANUAL
AS AN ATTEMPT TO IDENTIFY EROSION, SEDIMENT, AND OTHER POTENTIAL POLLUTANT SOURCES ASSOCIATED WITH THESE
CONSTRUCTION ACTIVITIES AND PREVENTING THOSE POLLUTANTS FROM LEAVING THE PROJECT SITE AS AN ILLICIT DISCHARGE.
FULL CITY REQUIREMENTS AND ARE OUTLINED AND CLARIFIED IN THE MANUAL UNDER CHAPTER 4: CONSTRUCTION CONTROL
MEASURES AND SHOULD BE USED TO IDENTIFY AND DEFINE WHAT IS NEEDED ON A PROJECT.
2)THE DEVELOPER SHALL MAKE THEMSELVES THOROUGHLY FAMILIAR WITH THE PROVISIONS AND THE CONTENT OF THE
SPECIFICATIONS LAID OUT IN THE MANUAL, THE DEVELOPMENT AGREEMENT, THE EROSION CONTROL MATERIALS COMPILED FOR
THIS PROJECT, AND THE FOLLOWING NOTES AS ALL THESE MATERIALS ARE APPLICABLE TO THIS PROJECT.
3)THE DEVELOPER SHALL IMPLEMENT AND MAINTAIN CONTROL MEASURES FOR ALL POTENTIAL POLLUTANTS FROM THE START OF
LAND DISTURBING ACTIVITIES UNTIL FINAL STABILIZATION OF THE CONSTRUCTION SITE.
4)THE CITY EROSION CONTROL INSPECTOR SHALL BE NOTIFIED AT LEAST TWENTY-FOUR (24) HOURS PRIOR TO THE DESIRED START
OF ANY CONSTRUCTION ACTIVITIES ON THIS SITE TO ALLOW ADEQUATE TIME FOR ON-SITE CONFIRMATION (INITIAL INSPECTION
WHICH CAN TAKE UP TO TWO BUSINESS DAYS AFTER RECEIVING THE REQUEST) THAT THE SITE IS IN FACT PROTECTED FROM
SEDIMENT AND POLLUTANTS DISCHARGES OFF SITE. PLEASE CONTACT EROSION@FCGOV.COM EARLY TO SCHEDULE THOSE
INITIAL EROSION CONTROL INSPECTIONS WELL IN ADVANCE SO THAT DEMOLITION, CLEARING, GRUBBING, TREE REMOVAL, AND
SCRAPING MAY BEGIN WITHOUT DELAY. FAILURE TO RECEIVE AN ON-SITE CONFIRMATION BEFORE CONSTRUCTION ACTIVITIES
COMMENCE IS AN AUTOMATIC “NOTICE OF VIOLATION” AND CAN RESULT IN FURTHER ENFORCEMENT ACTIONS.
5)THE DEVELOPER SHALL PROACTIVELY PROVIDE ALL APPROPRIATE CONTROL MEASURES TO PREVENT DAMAGE TO ADJACENT
DOWNSTREAM AND LEEWARD PROPERTIES. THIS INCLUDES BUT IS NOT LIMITED TO: TREES, SHRUBS, LAWNS, WALKS, PAVEMENTS,
ROADWAYS, STRUCTURES, CREEKS, WETLANDS, STREAMS, RIVERS, AND UTILITIES THAT ARE NOT DESIGNED FOR REMOVAL,
RELOCATION, OR REPLACEMENT IN THE COURSE OF CONSTRUCTION.
6)AT ALL TIMES THE DEVELOPER SHALL BE RESPONSIBLE TO ENSURE ADEQUATE CONTROL MEASURES ARE DESIGNED, SELECTED,
INSTALLED, MAINTAIN, REPAIRED, REPLACED, AND ULTIMATELY REMOVED IN ORDER
TO PREVENT AND CONTROL EROSION SUSPENSION, SEDIMENT TRANSPORTATION, AND POLLUTANT DISCHARGE AS A RESULT OF
CONSTRUCTION ACTIVITIES ASSOCIATED WITH THIS PROJECT.
7)ALL APPLICABLE CONTROL MEASURES BASED UPON THE SEQUENCING AND/OR PHASING OF THE PROJECT SHALL BE INSTALLED
PRIOR TO THOSE CONSTRUCTION ACTIVITIES COMMENCING.
8)AS DYNAMIC CONDITIONS (DUE TO THE NATURE, TIMING, SEQUENCE, AND PHASING OF CONSTRUCTION) IN THE FIELD MAY
WARRANT CONTROL MEASURES IN ADDITION, OR DIFFERENT, TO WHAT IS SHOWN ON THESE PLANS, THE DEVELOPER SHALL AT
ALL TIMES BE RESPONSIBLE TO IMPLEMENT THE CONTROL MEASURES THAT ARE MOST EFFECTIVE WITH THE CURRENT STATE
AND PROGRESS OF CONSTRUCTION. THE DEVELOPER SHALL IMPLEMENT WHATEVER MEASURES ARE DETERMINED NECESSARY,
AND/OR AS DIRECTED BY THE CITY EROSION CONTROL INSPECTOR. THE DEVELOPER SHALL INSURE THAT ALL EROSION CONTROL
PLANS (MAPS) OR SWMP DOCUMENTS ARE UPDATED TO REFLECT THE CURRENT SITE CONDITIONS, WITH UPDATES BEING
INITIALED AND DATED. THESE SITE INSPECTIONS AND SITE CONDITION UPDATES SHALL BE MADE AVAILABLE UPON REQUEST BY
THE CITY.
9)ALL LISTINGS, PROVISIONS, MATERIALS, PROCEDURES, ACTIVITIES, SITE WORK AND THE LIKE ARTICULATED IN THIS OR OTHER
WRITTEN SITE-SPECIFIC DOCUMENTS (INCLUDING BUT NOT LIMITED TO THE EROSION CONTROL REPORTS, DEVELOPMENT
AGREEMENTS, LANDSCAPE, AND DRAINAGE MATERIALS) SHALL MEET OR EXCEED THE MOST RESTRICTIVE LANGUAGE FOR CITY,
COUNTY, STATE, AND FEDERAL REGULATIONS WITH REGARDS TO EROSION, SEDIMENT, POLLUTANT, AND OTHER POLLUTION
SOURCE CONTROL MEASURES. THE DEVELOPER SHALL BE RESPONSIBLE TO COMPLY WITH ALL OF THESE AFOREMENTIONED
LAWS AND REGULATIONS.
10)THE DEVELOPER SHALL ENSURE THAT ALL APPROPRIATE PERMITS (CDPS GENERAL PERMIT STORMWATER DISCHARGES
ASSOCIATED WITH CONSTRUCTION ACTIVITY, DEWATERING, CLEAN WATER ACT, ARMY CORPS OF ENGINEERS' 404 WETLANDS
MITIGATION PERMIT, ETC.) HAVE BEEN ATTAINED PRIOR TO THE RELEVANT ACTIVITY HAS BEGUN. THESE PERMITS OR COPIES
SHALL BE MADE AVAILABLE UPON REQUEST BY THE CITY.
11)THE DEVELOPER SHALL FURNISH ALL CONVENIENCES AND ASSISTANCE TO AID THE EROSION CONTROL INSPECTORS OF
MATERIALS, WORKMANSHIP, RECORDS, AND SELF-INSPECTIONS, ETC. OF THE CONTROL MEASURES INVOLVED IN THE
CONSTRUCTION ACTIVITIES.
12)THE DEVELOPER SHALL REQUEST CLARIFICATION OF ALL APPARENT SITE CONSTRUCTION ISSUES THAT MAY ARISE DUE TO
INCONSISTENCIES IN CONSTRUCTION PLANS FOR THE SITE OR SITE CONDITIONS AROUND THE SELECTED CONTROL MEASURES
BY CONTACTING THE EROSION CONTROL INSPECTOR. THE EROSION CONTROL INSPECTOR WILL NOT BE RESPONSIBLE FOR ANY
EXPLANATIONS, INTERPRETATIONS, OR SUPPLEMENTARY DATA PROVIDED BY OTHERS.
13)ALL CONTROL MEASURES SHALL BE INSTALLED IN ACCORDANCE WITH THE MANUAL.
14)THE CITY RESERVES THE RIGHT TO REQUIRE ADDITIONAL CONTROL MEASURES AS SITE CONDITIONS WARRANT, TO THE EXTENT
AUTHORIZED BY RELEVANT LEGAL AUTHORITY.
15)AS WITH ANY CONSTRUCTION STANDARDS, OCCASIONS MAY ARISE WHERE THE MINIMUM EROSION CONTROL STANDARDS ARE
EITHER INAPPROPRIATE OR CANNOT BE JUSTIFIED. IN THESE CASES, A VARIANCE TO THESE STANDARDS MAY BE APPLIED FOR
PURSUANT TO THE TERMS, CONDITIONS, AND PROCEDURES OF THE MANUAL.
16)INSPECTION. THE CONTRACTOR SHALL INSPECT SITE POLLUTANT SOURCES AND IMPLEMENT CONTROL MEASURES AT A MINIMUM
OF ONCE EVERY TWO WEEKS DURING CONSTRUCTION AND WITHIN 24 HOURS FOLLOWING A PRECIPITATION EVENT.
DOCUMENTATION OF EACH INSPECTION SHALL BE RECORDED AND RETAINED BY THE CONTRACTOR.
17)ALL TEMPORARY CONTROL MEASURES SHALL BE CLEANED, REPAIRED, OR RECONSTRUCTED AS NECESSARY IN ORDER TO
ASSURE CONTINUAL 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 DRAINAGE WAY.
18)ANY CONTROL MEASURE MAY BE SUBSTITUTED FOR ANOTHER STANDARD CONTROL MEASURE SO LONG AS THAT CONTROL
MEASURE IS EQUAL TO, OR OF GREATER PROTECTION THAN THE ORIGINAL CONTROL MEASURE THAT WAS TO BE USED IN THAT
LOCATION. (EX. SILT FENCE, FOR WATTLES, OR FOR COMPACT BERMS) WATTLE ALONE ON COMMERCIAL CONSTRUCTION SITES
HAVE SHOWN TO BE AN INEFFECTIVE SUBSTITUTE FOR SILT FENCE OR COMPACT BERMS UNLESS IT IS ACCOMPANIED BY A
CONSTRUCTION FENCE TO PREVENT VEHICLE TRAFFIC.
19)ANY IMPLEMENTATION OR REPLACEMENT OF EXISTING CONTROL MEASURES FOR A NON-STANDARD CONTROL, OR ALTERNATIVE
CONTROL MEASURE, SHALL REQUIRE THE REVIEW AND ACCEPTANCE BY THE CITY EROSION CONTROL STAFF BEFORE THE
MEASURE WILL BE ALLOWED TO BE USED ON THIS PROJECT. THESE CONTROL MEASURES' DETAILS SHALL BE SUBMITTED,
REVIEWED AND ACCEPTED TO BE IN ACCORDANCE WITH THE EROSION CONTROL CRITERIA BASED UPON THE FUNCTIONALITY AND
EFFECTIVENESS IN ACCORDANCE WITH SOUND ENGINEERING AND HYDROLOGICAL PRACTICES.
LAND DISTURBANCE, STOCKPILES, AND STORAGE OF SOILS
20)THERE SHALL BE NO EARTH-DISTURBING ACTIVITY OUTSIDE THE LIMITS DESIGNATED ON THE ACCEPTED PLANS. OFF ROAD
STAGING AREAS OR STOCKPILES MUST BE PREAPPROVED BY THE CITY. DISTURBANCES BEYOND THESE LIMITS WILL BE
RESTORED TO ORIGINAL CONDITION.
21)PRE-DISTURBANCE VEGETATION SHALL BE IDENTIFIED, 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. THIS SHOULD INCLUDE SEQUENCING AND PHASING
CONSTRUCTION ACTIVITIES IN A WAY SO THAT THE SOIL IS NOT EXPOSED FOR LONG PERIODS OF TIME BY SCHEDULE OR LIMIT
GRADING TO SMALL AREAS. THIS SHOULD ALSO INCLUDE WHEN PRACTICAL ADVANCING THE SCHEDULE ON STABILIZATION
ACTIVITIES SUCH THAT LANDSCAPING TAKES PLACE SHORTLY IF NOT IMMEDIATELY AFTER GRADING HAS OCCURRED.
VEGETATION EFFORTS SHALL START AS SOON AS POSSIBLE TO RETURN THE SITE TO A STABILIZED CONDITION. SENSITIVE AREAS
SHOULD AVOID CLEARING AND GRADING ACTIVITIES AS MUCH POSSIBLE.
22)ALL EXPOSED SOILS OR DISTURBED AREAS ARE CONSIDERED A POTENTIAL POLLUTANT AND SHALL HAVE CONTROL MEASURES
IMPLEMENTED ON THE SITE TO PREVENT MATERIALS FROM LEAVING THE SITE.
23)ALL SOILS EXPOSED DURING LAND DISTURBING ACTIVITY (STRIPPING, GRADING, UTILITY INSTALLATIONS, STOCKPILING, FILLING,
ETC.) SHALL BE KEPT IN A ROUGHENED CONDITION AT ALL TIMES BY EQUIPMENT TRACKING, SCARIFYING OR DISKING THE
SURFACE ON A CONTOUR WITH A 2 TO 4 INCH MINIMUM VARIATION IN SOIL SURFACE UNTIL MULCH, VEGETATION, AND/OR OTHER
PERMANENT EROSION CONTROL IS INSTALLED.
24)NO SOIL STOCKPILE SHALL EXCEED TEN (10) FEET IN HEIGHT. ALL SOIL STOCKPILES SHALL BE PROTECTED FROM SEDIMENT
TRANSPORT THROUGH THE USE OF SURFACE ROUGHENING, WATERING, AND DOWN GRADIENT PERIMETER CONTROLS. ALL SOIL
STOCKPILES SHALL BE PROTECTED FROM SEDIMENT TRANSPORT BY WIND IN ACCORDANCE WITH MUNICIPAL CODE §12-150. ALL
STOCKPILES SHALL BE FLATTENED TO MEET GRADE OR REMOVED FROM SITE AS SOON AS PRACTICAL, AND NO LATER THAN THE
COMPLETION OF CONSTRUCTION ACTIVITIES OR ABANDONMENT OF THE PROJECT. ALL OFF-SITE STOCKPILE STORAGE LOCATIONS
IN CITY LIMITS SHALL HAVE A STOCKPILE PERMIT FROM THE CITY ENGINEERING DEPARTMENT PRIOR TO USING THE AREA TO
STORE MATERIAL. IF FREQUENT ACCESS FROM HARDSCAPE TO THE STOCKPILE IS NEEDED A STRUCTURAL TRACKING CONTROL
MEASURE SHALL BE IMPLEMENTED.
25)ALL REQUIRED CONTROL MEASURES SHALL BE INSTALLED PRIOR TO ANY LAND DISTURBING ACTIVITY (STOCKPILING, STRIPPING,
GRADING, ETC.). ALL OF THE REQUIRED EROSION CONTROL MEASURES MUST BE INSTALLED AT THE APPROPRIATE TIME IN THE
CONSTRUCTION SEQUENCE AS INDICATED IN THE APPROVED PROJECT SCHEDULE, CONSTRUCTION PLANS, AND EROSION
CONTROL REPORT.
26)ALL INLETS, CURB-CUTS, CULVERTS, AND OTHER STORM SEWER INFRASTRUCTURE WHICH COULD BE POTENTIALLY IMPACTED BY
CONSTRUCTION ACTIVITIES SHALL BE PROTECTED WITH CONTROL MEASURES. MATERIAL ACCUMULATED FROM THIS CONTROL
MEASURE SHALL BE PROMPTLY REMOVED AND IN CASES WHERE THE PROTECTION HAS FAILED, THE PIPES SHALL BE
THOROUGHLY CLEANED OUT.
27)ALL STREAMS, STREAM CORRIDORS, BUFFERS, WOODLANDS, WETLANDS, OR OTHER SENSITIVE AREAS SHALL BE PROTECTED
FROM IMPACT BY ANY CONSTRUCTION ACTIVITY THROUGH THE USE OF CONTROL MEASURES.
28)ALL EXPOSED DIRT SHALL HAVE PERIMETER CONTROL. ANY PERIMETER CONTROLS THAT DRAIN OFF OR HAS THE ABILITY TO BE
TRACKED ONTO THE NEARBY HARDSCAPE SHALL HAVE SOME FORM OF EFFECTIVE SEDIMENT CONTROL AS THE, OR AS PART OF
THE, PERIMETER CONTROL.
29)ALL EXPOSED SLOPES SHOULD BE PROTECTED. ALL EXPOSED STEEP SLOPES (STEEPER THAN 3:1 H:V) SHALL BE PROTECTED
FROM EROSION AND SEDIMENT TRANSPORT THROUGH USE OF CONTROL MEASURES.
30)NO SOILS SHALL REMAIN EXPOSED BY LAND DISTURBING ACTIVITY FOR MORE THAN THIRTY (30) DAYS AFTER ACTIVITY HAS
CEASED BEFORE REQUIRED TEMPORARY SEEDING OR PERMANENT EROSION CONTROL (E.G. SEED/MULCH, LANDSCAPING, ETC.) IS
INSTALLED. THIS IS NOT JUST LIMITED TO PROJECTS THAT ARE ABANDONED; THIS INCLUDES ANY PROJECT THAT IS TEMPORARILY
HALTED AND NO IMMEDIATE ACTIVITY IS TO RESUME WITHIN THE NEXT THIRTY (30) DAYS, UNLESS OTHERWISE APPROVED BY THE
CITY EROSION CONTROL INSPECTOR. DURING A SEASON WHEN SEEDING DOES NOT PRODUCE VEGETATIVE COVER, ANOTHER
TEMPORARY EROSION CONTROL SHALL BE IMPLEMENTED WITH OR UNTIL TEMPORARY SEEDING OR PERMANENT EROSION
CONTROL CAN BE PERFORMED.
31)ALL INDIVIDUAL LOTS SHALL HAVE EFFECTIVE SEDIMENT CONTROLS LOCATED ON THE STREET SIDE AND ANY DOWN GRADIENT
SIDE. TYPICALLY MOST LOTS DRAIN TO THE FRONT YET ON THOSE CASES WHERE HOUSES ARE ALONG A POND OR DRAINAGE
SWALE HAVE THE LOT DRAIN IN A DIFFERENT DIRECTION THAN THE STREET, THOSE INDIVIDUAL LOTS WILL NEED PROTECTION ON
THAT DOWN GRADIENT SIDE TO PREVENT SEDIMENT FROM LEAVING THE LOT. SEE THE INDIVIDUAL LOT DETAILS FOR FURTHER
CLARIFICATION.
VEHICLE TRACKING
32)AT ALL POINTS WHERE VEHICLES EXIT OR LEAVE THE EXPOSED DIRT AREA ON TO A HARDSCAPE OR SEMI HARDSCAPE
(CONCRETE, ASPHALT, ROAD BASE, ETC.) SHALL HAVE INSTALLED AT LEAST ONE STRUCTURAL TRACKING CONTROL MEASURE TO
PREVENT VEHICLE TRACKING. ALL AREAS NOT PROTECTED BY AN ADEQUATE PERIMETER CONTROL SHALL BE CONSIDERED A
POINT WHERE VEHICLES EXIT THE SITE. ACCESS POINTS SHOULD BE LIMITED TO AS FEW ENTRANCES AS POSSIBLE (ALL
PERIMETER AREAS SHALL BE PROTECTED FROM TRACKING ACTIVITIES).
33)IN ALL AREAS THAT THE STRUCTURAL TRACKING CONTROL MEASURES FAIL TO PREVENT VEHICLE TRACKING, COLLECTION AND
PROPER DISPOSAL OF THAT MATERIAL IS REQUIRED. ALL INLETS LOCATED NEAR ACCESS POINTS AND AFFECTED BY TRACKING
ACTIVITIES SHALL BE PREVENTED FROM THE INTRODUCTION OF SEDIMENT INTO THE DRAINAGE SYSTEM.
34)CITY MUNICIPAL CODE §20-62, AMONG OTHER THINGS, PROHIBITS THE TRACKING, DROPPING, OR DEPOSITING OF SOILS OR ANY
OTHER MATERIAL ONTO CITY STREETS BY OR FROM ANY SOURCE. CITY MUNICIPAL CODE, §26-498, AMONG OTHER THINGS,
PROHIBITS THE DISCHARGE OF POLLUTANTS ON PUBLIC OR PRIVATE PROPERTY IF THERE IS A SIGNIFICANT POTENTIAL FOR
MIGRATION OF SUCH POLLUTANT. THEREFORE, ALL TRACKED OR DEPOSITED MATERIALS (INTENTIONAL OR INADVERTENT) ARE
NOT PERMITTED TO REMAIN ON THE STREET OR GUTTER AND SHALL BE REMOVED AND LEGALLY DISPOSED OF BY THE
DEVELOPER IN A TIMELY AND IMMEDIATE MANNER. DIRT RAMPS INSTALLED IN THE CURB-LINES ARE NOT EXEMPT TO THESE
SECTIONS OF CODE AND SHALL NOT BE PERMITTED IN THE STREET RIGHT OF WAY (PUBLIC OR PRIVATE).
35)IF REPEATED DEPOSIT OF MATERIAL OCCURS ON A SITE, ADDITIONAL STRUCTURAL TRACKING CONTROLS MAY BE REQUIRED OF
THE DEVELOPER BY THE CITY EROSION CONTROL INSPECTOR.
LOADING AND UNLOADING OPERATIONS
36)THE DEVELOPER SHALL APPLY CONTROL MEASURE TO LIMIT TRAFFIC (SITE WORKER OR PUBLIC) IMPACTS AND PROACTIVELY
LOCATE MATERIAL DELIVERED TO THE SITE IN CLOSE PROXIMITY TO THE WORK AREA OR IMMEDIATELY INCORPORATED IN THE
CONSTRUCTION TO LIMIT OPERATIONAL IMPACTS TO DISTURBED AREAS, VEHICLE TRACKING, AND SEDIMENT DEPOSITION THAT
COULD IMPACT WATER QUALITY.
OUTDOOR STORAGE OR CONSTRUCTION SITE MATERIALS, BUILDING MATERIALS, FERTILIZERS, AND CHEMICALS
37)ANY MATERIALS OF A NON-POLLUTING NATURE (STEEL, ROCK, BRICK, LUMBER, ETC.) SHALL BE INSPECTED FOR ANY RESIDUE
COMING OFF THE MATERIAL DURING ROUTINE INSPECTION AND WILL GENERALLY BE LOCATED WHERE PRACTICAL AT LEAST FIFTY
(50) FEET FROM ANY PERMANENT OR INTERIM DRAINAGE WAYS.
38)ANY HIGH ENVIRONMENTAL IMPACT POLLUTANT MATERIALS THAT HAVE A HIGH LIKELIHOOD TO RESULT IN DISCHARGE WHEN IN
CONTACT WITH STORMWATER (LUBRICANTS, FUELS, PAINTS, SOLVENTS, DETERGENTS, FERTILIZERS, CHEMICAL SPRAYS, BAGS OF
CEMENT MIX, ETC.) SHOULD NOT BE KEPT ON SITE WHERE PRACTICAL. WHEN NOT PRACTICAL, THEY SHOULD BE STORED INSIDE
(VEHICLE, TRAILER, CONNEX, BUILDING, ETC.) AND OUT OF CONTACT WITH STORMWATER OR STORMWATER RUNOFF. WHERE NOT
AVAILABLE, THEY SHALL BE STORED OUTSIDE IN A RAISED (HIGH SPOTS OR ON PALLETS), COVERED (PLASTIC OR TARPED), AND
SEALED (LEAK PROOF CONTAINER) IN SECONDARY CONTAINMENT LOCATION. THE SECONDARY CONTAINMENT OR OTHER
CONTROL MEASURE SHALL BE ADEQUATELY SIZED, LOCATED, WHERE PRACTICAL, AT LEAST FIFTY (50) FEET FROM ANY
PERMANENT OR INTERIM STORMWATER STRUCTURES OR DRAINAGE WAYS AND SHALL BE MONITORED AS PART OF THE ROUTINE
INSPECTIONS.
VEHICLE AND EQUIPMENT MAINTENANCE AND FUELING
39)PARKING, REFUELING, AND MAINTENANCE OF VEHICLES AND EQUIPMENT SHOULD BE LIMITED IN ONE AREA OF THE SITE TO
MINIMIZE POSSIBLE SPILLS AND FUEL STORAGE AREAS. THIS AREA SHALL BE LOCATED, WHERE PRACTICAL, AT LEAST FIFTY (50)
FEET FROM ANY PERMANENT OR INTERIM STORMWATER STRUCTURES OR DRAINAGE WAYS AND SHALL BE MONITORED AS PART
OF THE ROUTINE INSPECTIONS. ALL AREAS SHALL KEEP SPILL KITS AND SUPPLIES CLOSE.
SIGNIFICANT DUST OR PARTICULATE GENERATING PROCESS
40)THE PROPERTY MUST BE ACTIVELY PREVENTING THE EMISSION OF FUGITIVE DUST AT ALL TIMES DURING CONSTRUCTION AND
VEGETATION ACTIVITIES. ALL LAND DISTURBING ACTIVITIES THAT RESULT IN FUGITIVE DUST SHALL BE IN ACCORDANCE WITH
MUNICIPAL CODE §12-150 TO REDUCE THE IMPACTS TO ADJACENT PROPERTIES AND COMMUNITY HEALTH. ALL REQUIRED
PRACTICES SHALL BE IMPLEMENTED AND ADDITIONAL ONES SHALL BE FOLLOWED. THESE PRACTICES INCLUDE WATERING THE
SITES AND DISCONTINUING CONSTRUCTION ACTIVITIES UNTIL THE WIND SUBSIDES AS DETERMINED BY ANY CITY INSPECTORS.
CONCRETE TRUCK / EQUIPMENT WASHING, INCLUDING THE CONCRETE TRUCK CHUTE AND ASSOCIATED FIXTURES AND EQUIPMENT
41)ALL CONCRETE AND EQUIPMENT WASHING SHALL USE STRUCTURAL CONTROL MEASURES APPROPRIATE TO THE VOLUME OF
WASH AND FREQUENCY OF USE. THESE CONTROL MEASURES SHALL BE LOCATED, WHERE PRACTICAL, AT LEAST FIFTY (50) FEET
FROM ANY PERMANENT OR INTERIM STORMWATER STRUCTURES OR DRAINAGE WAYS AND SHALL BE MONITORED AS PART OF
THE ROUTINE INSPECTIONS. THESE AREAS SHALL BE CLEARLY IDENTIFIED AND PROTECTED FROM ANY WASH FROM LEAVING THE
CONTROL MEASURE. IF FREQUENT ACCESS FROM HARDSCAPE TO THE CONTROL MEASURE IS TO OCCUR, A STRUCTURAL
TRACKING CONTROL MEASURE SHALL BE IMPLEMENTED. THESE CONTROL MEASURES SHALL BE FREQUENTLY CLEANED OUT.
42)THE DEVELOPER IS RESPONSIBLE FOR ENSURING WASHING ACTIVITY IS TAKING PLACE AT THE APPROPRIATE CONTROL MEASURE
AND SITE WORKERS ARE NOT WASHING OR DUMPING WASH WATER ON TO THE DIRT OR OTHER UNCONTROLLED LOCATIONS.
DEDICATED ASPHALT AND CONCRETE BATCH PLANTS
43)DEDICATED ASPHALT AND CONCRETE BATCH PLANTS ARE NOT ACCEPTABLE ON CONSTRUCTION SITES WITHIN THE CITY OF FORT
COLLINS WITHOUT AN EXPRESSED WRITTEN REQUEST AND PLAN TO REDUCE POLLUTANTS ASSOCIATED WITH THAT TYPE OF
ACTIVITY AND APPROVAL BY THE CITY OF FORT COLLINS SPECIFICALLY THE EROSION CONTROL INSPECTOR. THE DEVELOPER
SHALL INFORM THE EROSION CONTROL INSPECTION STAFF OF ANY DEDICATED ASPHALT, OR CONCRETE BATCH PLANTS THAT IS
TO BE USED ON SITE.
CONCRETE SAW CUTTING MATERIALS
44)SAW CUTTING MATERIAL SHALL BE IN ACCORDANCE WITH MUNICIPAL CODE §12-150 FOR AIR EMISSIONS AND ALL WATER
APPLICATIONS TO THE SAW CUTTING SHALL PREVENT MATERIAL FROM LEAVING THE IMMEDIATE SITE AND COLLECTED. THESE
CUTTING LOCATIONS, ONCE DRIED, SHALL BE SWEPT AND SCRAPED OF ALL MATERIAL AND SHALL HAVE PROPER AND LEGAL
DISPOSAL.
WASTE MATERIALS STORAGE AND SANITARY FACILITIES
45)TRASH, DEBRIS, MATERIAL SALVAGE, AND/OR RECYCLING AREAS SHALL BE, WHERE PRACTICAL, AT LEAST FIFTY
(50) FEET FROM ANY PERMANENT OR INTERIM STORMWATER STRUCTURES OR DRAINAGE WAYS AND SHALL BE MONITORED AS
PART OF THE ROUTINE INSPECTIONS. THESE FACILITIES SHOULD BE LOCATED OUT OF THE WIND AND COVERED AS ABLE. WHERE
NOT ABLE TO COVER, LOCATING SAID AREAS ON THE SIDE OF OTHER STRUCTURES TO REDUCE EXPOSURE TO WINDS, AND
FOLLOW MAXIMUM LOADING GUIDELINES AS MARKED ON THE CONTAINER. THE DEVELOPER IS REQUIRED TO PRACTICE GOOD
HOUSEKEEPING TO KEEP THE CONSTRUCTION SITE FREE OF LITTER, CONSTRUCTION DEBRIS, AND LEAKING CONTAINERS.
46)SANITARY FACILITIES SHALL BE PREVENTED FROM TIPPING THROUGH THE USE OF ANCHORING TO THE GROUND OR LASHING TO A
STABILIZED STRUCTURE. THESE FACILITIES SHALL ALSO BE LOCATED AS FAR AS PRACTICAL FROM AN INLET, CURB CUT,
DRAINAGE SWALE OR OTHER DRAINAGE CONVEYANCES TO PREVENT MATERIAL TRANSPORT FROM LEAVING THE LOCAL AREA.
THIS CONSISTS OF THE FACILITY BEING LOCATED, WHERE PRACTICAL, AT LEAST FIFTY (50) FEET FROM ANY PERMANENT OR
INTERIM DRAINAGE WAYS.
OTHER SITE OPERATIONS AND POTENTIAL SPILL AREAS
47)SPILLS: FOR THOSE MINOR SPILLS THAT; ARE LESS THAN THE STATE'S REPORTABLE QUANTITY FOR SPILLS, STAY WITHIN THE
PERMITTED AREA, AND IN NO WAY THREATEN ANY STORMWATER CONVEYANCE, NOTIFY THE CITY OF FORT COLLINS UTILITIES BY
EMAIL AT EROSION@FCGOV.COM OR PHONE (970) 817-4770. FOR ANY SIGNIFICANT, MAJOR, OR HAZARDOUS SPILLS, NOTIFY THE
CITY OF FORT COLLINS UTILITIES BY PHONE ONLY AFTER EMERGENCY RESPONSE (911) HAS BEEN NOTIFIED AND IS ON ROUTE,
COUNTY HEALTH DEPARTMENT (LCDHE) HAS BEEN NOTIFIED THROUGH LARIMER COUNTY SHERIFF DISPATCH (970) 416-1985, AND
THE STATE SPILL HOTLINE INCIDENT REPORTING HAVE BEEN CONTACTED 1-877-518-5608. WRITTEN DOCUMENTATION SHALL BE
PROVIDED TO THE CITY WITHIN 5 DAYS OF THE EVENT. ALL SPILLS SHALL BE CLEANED UP IMMEDIATELY.
48)SELECTION OF “PLASTIC WELDED” EROSION CONTROL BLANKETS SHALL NOT BE USED IN AREAS THAT WILDLIFE, SUCH AS SNAKES,
ARE LIKELY TO BE LOCATED AS THESE HAVE PROVEN TO CAUSE ENTRAPMENT ISSUES.
FINAL STABILIZATION AND PROJECT COMPLETION
49)ANY STORMWATER FACILITIES USED AS A TEMPORARY CONTROL MEASURE WILL BE RESTORED AND STORM SEWER LINES WILL BE
CLEANED UPON COMPLETION OF THE PROJECT AND BEFORE TURNING THE MAINTENANCE OVER TO THE OWNER, HOMEOWNERS
ASSOCIATION (HOA), OR OTHER PARTY RESPONSIBLE FOR LONG TERM MAINTENANCE OF THOSE FACILITY.
50)ALL FINAL STABILIZATION SPECIFICATIONS SHALL BE DONE IN ACCORDANCE WITH THE MANUAL, CHAPTER 4: CONSTRUCTION
CONTROL MEASURES.
51) ALL DISTURBED AREAS DESIGNED TO BE VEGETATED SHALL BE AMENDED, SEEDED & MULCHED, OR LANDSCAPED AS SPECIFIED IN
THE LANDSCAPE PLANS WITHIN 14 WORKING DAYS OF FINAL GRADING.
52)SOIL IN ALL VEGETATED (LANDSCAPED OR SEEDED) AREAS, INCLUDING PARKWAYS AND MEDIANS SHALL COMPLY WITH ALL
REQUIREMENTS SET FORTH IN SECTIONS 12-130 THROUGH 12-132 OF THE CITY MUNICIPAL CODE, AS WELL AS SECTION 3.8.21 FOR
THE CITY LAND USE CODE.
53)ALL SEEDING SHALL REFER TO LANDSCAPING PLANS FOR SPECIES MIXTURE AND APPLICATION RATES AND DEPTHS
REQUIREMENTS.
54)ALL SEED SHALL BE DRILLED WHERE PRACTICAL TO A DEPTH BASED UPON THE SEED TYPE. BROADCAST SEEDING SHALL BE
APPLIED AT DOUBLE THE RATE AS PRESCRIBED FOR DRILL SEEDING AND SHALL BE LIGHTLY HAND RAKED AFTER APPLICATION.
HYDROSEEDING MAY BE SUBSTITUTED FOR DRILL SEEDING ON SLOPES STEEPER THAN 3(H):1(V) OR ON OTHER AREAS NOT
PRACTICAL TO DRILL SEED AND CRIMP AND MULCH. ALL HYDROSEEDING MUST BE CONDUCTED AS TWO SEPARATE PROCESSES
OF SEEDING AND TACKIFICATION.
55)ALL SEEDED AREAS MUST BE MULCHED WITHIN TWENTY-FOUR (24) AFTER PLANTING. ALL MULCH SHALL BE MECHANICALLY
CRIMPED AND OR ADEQUATELY APPLIED TACKIFIER. THE USE OF CRIMPED MULCH OR TACKIFIER MAY REQUIRE MULTIPLE
RE-APPLICATIONS IF NOT PROPERLY INSTALLED OR HAVE WEATHERED OR DEGRADED BEFORE VEGETATION HAS BEEN
ESTABLISHED. AREAS OF EMBANKMENTS HAVING SLOPES GREATER THAN OR EQUAL TO 3H:1V SHALL BE STABILIZED WITH AN
EROSION MAT OR APPROVED EQUAL TO ENSURE SEED WILL BE ABLE TO GERMINATE ON THE STEEP SLOPES. DURING A SEASON
WHEN SEEDING DOES NOT PRODUCE VEGETATIVE COVER, ANOTHER TEMPORARY EROSION CONTROL SHALL BE IMPLEMENTED
ALONG WITH, OR UNTIL, TEMPORARY SEEDING OR PERMANENT EROSION CONTROL CAN BE PERFORMED.
56)THE DEVELOPER SHALL WARRANTY AND MAINTAIN ALL VEGETATIVE MEASURES FOR TWO GROWING SEASONS AFTER
INSTALLATION OR UNTIL SEVENTY PERCENT (70%) VEGETATIVE COVER HAS BEEN ESTABLISHED, WHICHEVER IS LONGER AND
MEETS ALL THE CRITERIA OUTLINED IN THE FORT COLLINS STORMWATER CRITERIA MANUAL CHAPTER 4: CONSTRUCTION
CONTROL MEASURES.
57)THE DEVELOPER SHALL MAINTAIN, MONITOR, REPAIR, AND REPLACE ANY AND ALL APPLICABLE CONTROL MEASURES UNTIL FINAL
STABILIZATION HAS BEEN OBTAINED. ALL CONTROL MEASURES MUST REMAIN UNTIL SUCH TIME AS ALL UPSTREAM CONTRIBUTING
POLLUTANT SOURCES HAVE BEEN VEGETATED OR REMOVED FROM THE SITE. WHEN ANY CONTROL MEASURE IS REMOVED, THE
DEVELOPER SHALL BE RESPONSIBLE FOR THE CLEANUP AND REMOVAL OF ALL SEDIMENT AND DEBRIS FROM THAT CONTROL
MEASURE. AT THE POINT AT WHICH THE SITE HAS BEEN DEEMED STABILIZED AND VERIFIED BY CITY EROSION CONTROL
INSPECTOR, ALL TEMPORARY CONTROL MEASURES CAN THEN BE FULLY REMOVED. ALL MEASURES SHALL BE REMOVED WITHIN 30
DAYS AFTER FINAL STABILIZATION IS ACHIEVED.
58)THE RESPONSIBLE PARTY SHALL MAINTAIN AND KEEP CURRENT ALL PAYMENTS OR RELATED FORMS OF SECURITY FOR THE
EROSION CONTROL ESCROW UNTIL 1) STABILIZATION HAS BEEN REACHED AND 2) ALL CONTROL MEASURES AND/OR BMPS HAVE
SEDIMENT MATERIALS COLLECTED AND THE CONTROL MEASURE REMOVED FROM THE SITE. AT THAT TIME THE SITE WILL BE
CONSIDERED COMPLETED AND ANY REMAINING EROSION CONTROL ESCROW SHALL BE RETURNED TO THE APPROPRIATE
PARTIES.
07/23/25
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FOR DRAINAGE REVIEW ONLY
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07/23/25
EKEEFE CIVIL, INC
3125 Crockett Street
Fort Collins, Colorado 80526
(970) 215-6808
meg@keefecivil.com
July 21, 2025 Keefe Civil Project Number: 2025-008
Water Utilities Engineering
City of Fort Collins
700 Wood Street
Fort Collins, Colorado 80522
RE: 514 Wood Street Drainage and Erosion Control Memo
Parcel 9711215001
To Whom it May Concern:
The purpose of this letter is to describe the proposed site improvements and potential drainage
impacts at 514 Wood Street (Exhibit A). The 0.23-acre project site is a historically developed
single-family residential lot that had one home, a shed in the backyard, concrete patios, and a
gravel driveway (Exhibit B). The site is located within the Old Town drainage basin and is on the
east side of Wood Street between Elm Street and Sycamore Street in Fort Collins, Colorado
(Figure 1). The lot is bound by Wood Street right-of-way to the west and existing single-family
residences to the north, east, and south.
Figure 1: Vicinity Map
514 Wood Street Drainage and Erosion Control Memo
Page 2 of 4 July 21, 2025
Per the NRCS Soil Survey of Larimer County (Exhibit C), the site entirely consists of Paoli fine
sandy loam and is classified as being within hydrologic soil group A. These soils are anticipated to
have a high infiltration rate when thoroughly wet and a high rate of water transmission.
Per the attached flood insurance rate map (Exhibit D), the lot is located within Zone X (Panel
08069C0977G). Zone X is defined as an area of minimal flood hazard and does not have a base
flood elevation associated with it. Additionally, the site is located outside of any City of Fort
Collins floodplains.
Historically, 0.291-acre of the site’s stormwater has drained with flat slopes towards the north,
onto the adjacent private property. The site’s northern property line is a localized depression and
does not drain into public right-of-way (Figure 2). Historic and developed drainage basin exhibits
are provided in Appendix E.
Figure 2: Looking north from southern property line
The proposed site improvements include a new primary home with a basement, a detached
accessory building, a concrete driveway, retaining walls on two property lines, and a 2 ft concrete
valley pan along the southern property line. The grading plan with retaining walls and valley pan
was developed to improve site drainage patterns by directing all stormwater flows out to Wood
Street right-of-way. Private storm drain pipes have been designed to drain the backyard under the
driveway, and to get the landscape area between the two buildings to drain towards Wood Street.
The garage floor drains in the accessory building have been designed by the architect to tie into the
storm drain pipe under the driveway.
Where possible, impervious areas and downspouts shall be routed into pervious areas with
landscaping to allow for project stormwater infiltration and increased water quality with site
runoff.
As indicated in the table below, the adjusted site imperviousness will increase by ~3,412 sf. Since
the lot’s total adjusted impervious area increase is <5,000 square feet (sf), water quantity detention
requirements are not required for this project.
514 Wood Street Drainage and Erosion Control Memo
Page 3 of 4 July 21, 2025
Overall Site Hardscape or Hard
Surface
Historic Site
Area (sf)
Adjusted Historic
Area (sf)
Developed
Site Area (sf)
Adjusted
Developed Area (sf)
Concrete (100%) 770 770 2,285 2,285
Rooftop (90%) 1,600 1,440 4,045 3,641
Gravel (40%) 760 304 0 0
Total Impervious Area 3,130 2,514 6,330 5,926
Adjusted Site Imperviousness 3,412 sf
The historic imperviousness calculations were based on a 2021 aerial photo of the site (Exhibit B).
Erosion Control Measures
To minimize erosion and sediment transport during construction activities, structural practices
are proposed at the site (Exhibit F), which will include sediment control logs, a concrete washout
area, and inlet protection. After construction has been completed at the site, all disturbed areas
shall be landscaped by the property owner. The anticipated disturbed area for site improvements
is estimated at 0.29 acres.
See erosion and sediment control escrow / security calculations in Exhibit F.
Table of Calculations for 514 Wood Street
Total area of disturbance for project 0.29 acres
Approximate % of project to be disturbed at any one time 100%
Number of construction phases one
Pre-existing vegetative density 70%
Existing soil type hydrologic soil group A
Approximate depth to high groundwater level 7 ft
Total volume of project earthwork estimated 392 cubic yards
Based on the Earth Engineering Company (EEC) geotechnical report for the site (EEC 2024),
groundwater was encountered at 7 ft below the existing ground. EEC recommends there be at
least a 2 ft separation between the foundation bearing elevation and peak seasonal groundwater
levels, which the site appears to accomplish with a finish floor elevation of 5006 ft (see below).
Existing ground elevation at location of soil bore ~ 5001 ft
Groundwater elevation ~ 4994 ft
Finish floor = 5006 ft
Basement elevation = 4996.82 ft
Conclusions
Based on the enclosed design, it is my professional opinion that the additional runoff generated by
these site improvements will not cause adverse impacts to downstream private properties. I hereby
attest that this letter for the final drainage design for 514 Wood Street was prepared by me or
under my direct supervision, in accordance with the provisions of the Fort Collins Stormwater
Criteria Manual. I understand that the City of Fort Collins does not and will not assume liability
514 Wood Street Drainage and Erosion Control Memo
Page 4 of 4 July 21, 2025
for drainage facilities designed by others.
Thank you for the opportunity to submit this drainage and erosion control memo. Please do not
hesitate to reach out to me if you have any questions or comments regarding the above items.
Best regards,
Megan L. Keefe, PE / Manager
Keefe Civil, Inc.
Cc: Todd Sears, Hammersmith Structures
Attachments
Exhibit A: 514 Wood Street Grading Plan
Exhibit B: 514 Wood Street Historic Site Plan
Exhibit C: NRCS Soil Survey of Larimer County
Exhibit D: FIRM Map
Exhibit E: Historic and Developed Drainage Plans
Exhibit F: Erosion Control Plans, Details, and Escrow Calculations
References
EEC. 2024. Geotechnical Subsurface Exploration Proposed Residence. EEC Project No. 24-01-
051. April 19, 2024.
07/23/25
EXHIBIT A
514 Wood Street Grading Plan
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FF = 5006.00
TOF = 5004.82 UNLESS OTHERWISE
NOTED
PROPERTY LINE
PROPERTY LINE /
ROW LIMITS
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DETAIL A
PROPOSED BUILDING
TOF = 5004.75 UNLESS
OTHERWISE NOTED
PROPOSED CONCRETE VALLEY PAN
DSDS
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TOF=5005.69
TOF=5005.25
DETAIL B
DETAIL C
DETAIL D
EXHIBIT B
514 Wood Street Historic Site Plan
June 2021 at 514 Wood Street
100 ft
N
➤➤
N
EXHIBIT C
NRCS Soil Survey of Larimer County
Hydrologic Soil Group—Larimer County Area, Colorado
(514 Wood Street)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/9/2025
Page 1 of 4
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492299 492305 492311 492317 492323 492329 492335 492341 492347 492353
492299 492305 492311 492317 492323 492329 492335 492341 492347 492353
40° 35' 39'' N
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40° 35' 38'' N
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Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
0 10 20 40 60
Feet
0 4 8 16 24
Meters
Map Scale: 1:275 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Rating Polygons
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Lines
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Points
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Larimer County Area, Colorado
Survey Area Data: Version 19, Aug 29, 2024
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jul 2, 2021—Aug 25,
2021
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
Hydrologic Soil Group—Larimer County Area, Colorado
(514 Wood Street)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/9/2025
Page 2 of 4
Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
81 Paoli fine sandy loam, 0
to 1 percent slopes
A 0.4 100.0%
Totals for Area of Interest 0.4 100.0%
Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive
precipitation from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when
thoroughly wet. These consist mainly of deep, well drained to excessively
drained sands or gravelly sands. These soils have a high rate of water
transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well
drained soils that have moderately fine texture to moderately coarse texture.
These soils have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of
water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay
layer at or near the surface, and soils that are shallow over nearly impervious
material. These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in
their natural condition are in group D are assigned to dual classes.
Rating Options
Aggregation Method: Dominant Condition
Hydrologic Soil Group—Larimer County Area, Colorado 514 Wood Street
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/9/2025
Page 3 of 4
Aggregation is the process by which a set of component attribute values is
reduced to a single value that represents the map unit as a whole.
A map unit is typically composed of one or more "components". A component is
either some type of soil or some nonsoil entity, e.g., rock outcrop. For the
attribute being aggregated, the first step of the aggregation process is to derive
one attribute value for each of a map unit's components. From this set of
component attributes, the next step of the aggregation process derives a single
value that represents the map unit as a whole. Once a single value for each map
unit is derived, a thematic map for soil map units can be rendered. Aggregation
must be done because, on any soil map, map units are delineated but
components are not.
For each of a map unit's components, a corresponding percent composition is
recorded. A percent composition of 60 indicates that the corresponding
component typically makes up approximately 60% of the map unit. Percent
composition is a critical factor in some, but not all, aggregation methods.
The aggregation method "Dominant Condition" first groups like attribute values
for the components in a map unit. For each group, percent composition is set to
the sum of the percent composition of all components participating in that group.
These groups now represent "conditions" rather than components. The attribute
value associated with the group with the highest cumulative percent composition
is returned. If more than one group shares the highest cumulative percent
composition, the corresponding "tie-break" rule determines which value should
be returned. The "tie-break" rule indicates whether the lower or higher group
value should be returned in the case of a percent composition tie. The result
returned by this aggregation method represents the dominant condition
throughout the map unit only when no tie has occurred.
Component Percent Cutoff: None Specified
Components whose percent composition is below the cutoff value will not be
considered. If no cutoff value is specified, all components in the database will be
considered. The data for some contrasting soils of minor extent may not be in the
database, and therefore are not considered.
Tie-break Rule: Higher
The tie-break rule indicates which value should be selected from a set of multiple
candidate values, or which value should be selected in the event of a percent
composition tie.
Hydrologic Soil Group—Larimer County Area, Colorado 514 Wood Street
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/9/2025
Page 4 of 4
EXHIBIT D
FIRM Map
1 D W L R Q D O ) O R R G + D ] D U G / D \ H U ) , 5 0 H W W H
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6 3 ( & , $ / ) / 2 2 '
+ $ = $ 5 ' $ 5 ( $ 6
: L W K R X W % D V H ) O R R G ( O H Y D W L R Q % ) (
= R Q H $ 9 $
: L W K % ) ( R U ' H S W K = R Q H $ ( $ 2 $ + 9 ( $ 5
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R I D Q Q X D O F K D Q F H I O R R G Z L W K D Y H U D J H
G H S W K O H V V W K D Q R Q H I R R W R U Z L W K G U D L Q D J H
D U H D V R I O H V V W K D Q R Q H V T X D U H P L O H = R Q H ;
) X W X U H & R Q G L W L R Q V $ Q Q X D O
& K D Q F H ) O R R G + D ] D U G = R Q H ;
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& U R V V 6 H F W L R Q V Z L W K $ Q Q X D O & K D Q F H
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& R D V W D O 7 U D Q V H F W
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3 U R I L O H % D V H O L Q H
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% D V H ) O R R G ( O H Y D W L R Q / L Q H % ) (
( I I H F W L Y H / 2 0 5 V
/ L P L W R I 6 W X G \
- X U L V G L F W L R Q % R X Q G D U \
' L J L W D O ' D W D $ Y D L O D E O H
1 R ' L J L W D O ' D W D $ Y D L O D E O H
8 Q P D S S H G
7 K L V P D S F R P S O L H V Z L W K ) ( 0 $
V V W D Q G D U G V I R U W K H X V H R I
G L J L W D O I O R R G P D S V L I L W L V Q R W Y R L G D V G H V F U L E H G E H O R Z
7 K H E D V H P D S V K R Z Q F R P S O L H V Z L W K ) ( 0 $
V E D V H P D S
D F F X U D F \ V W D Q G D U G V
7 K H I O R R G K D ] D U G L Q I R U P D W L R Q L V G H U L Y H G G L U H F W O \ I U R P W K H
D X W K R U L W D W L Y H 1 ) + / Z H E V H U Y L F H V S U R Y L G H G E \ ) ( 0 $ 7 K L V P D S
Z D V H [ S R U W H G R Q D W 3 0 D Q G G R H V Q R W
U H I O H F W F K D Q J H V R U D P H Q G P H Q W V V X E V H T X H Q W W R W K L V G D W H D Q G
W L P H 7 K H 1 ) + / D Q G H I I H F W L Y H L Q I R U P D W L R Q P D \ F K D Q J H R U
E H F R P H V X S H U V H G H G E \ Q H Z G D W D R Y H U W L P H
7 K L V P D S L P D J H L V Y R L G L I W K H R Q H R U P R U H R I W K H I R O O R Z L Q J P D S
H O H P H Q W V G R Q R W D S S H D U E D V H P D S L P D J H U \ I O R R G ] R Q H O D E H O V
O H J H Q G V F D O H E D U P D S F U H D W L R Q G D W H F R P P X Q L W \ L G H Q W L I L H U V
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X Q P D S S H G D Q G X Q P R G H U Q L ] H G D U H D V F D Q Q R W E H X V H G I R U
U H J X O D W R U \ S X U S R V H V
/ H J H Q G
2 7 + ( 5 $ 5 ( $ 6 2 )
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* ( 1 ( 5 $ /
6 7 5 8 & 7 8 5 ( 6
2 7 + ( 5
) ( $ 7 8 5 ( 6
0 $ 3 3 $ 1 ( / 6
%
7 K H S L Q G L V S O D \ H G R Q W K H P D S L V D Q D S S U R [ L P D W H
S R L Q W V H O H F W H G E \ W K H X V H U D Q G G R H V Q R W U H S U H V H Q W
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EXHIBIT E
Historic and Developed Drainage Plans
ELEC
HI
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2
5
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2
6
(9
7
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)
2
1
5
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6
8
0
8
ME
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F
E
C
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C
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FOR DRAINAGE REVIEW ONLY
NOT FOR CONSTRUCTION
LEGEND:
7 OF 8
WO
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S
T
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T
PROPERTY LINE/RIGHT-OF-WAY
PROPERTY LINE
PROPERTY LINE
PROPERTY LINE
ELEC
5003
50
0
4
50
0
4
5004
50
0
4
50
0
4
50
0
5
5002
50
0
3
50
0
4
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LEGEND:
8 OF 8
FOR DRAINAGE REVIEW ONLY
NOT FOR CONSTRUCTION
WO
O
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PROPOSED
BUILDING
PROPOSED
BUILDING
DSDS
DS
DS
DS
DS
DS
DS
DS
PROPERTY LINE/RIGHT-OF-WAY
PROPERTY LINE
PROPERTY LINE
PROPERTY LINE
EXHIBIT F
Erosion Control Plans, Details, and Escrow Calculations
ELEC
F.O.
VAULT
5003
50
0
4
50
0
4
5004
50
0
4
50
0
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50
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3
50
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4
4 OF 8
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PROPOSED
BUILDING
PROPERTY LINE
PROPERTY LINE / ROW LIMITS
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,
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SCL
IP
CWA
IP
CWA
SCL
SCL
PROPOSED
BUILDING
PROPERTY LINE
PROPERTY LINE
5 OF 8
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L
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,
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O
8
0
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2
6
(9
7
0
)
2
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(9
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6 OF 8
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GENERAL EROSION CONTROL NOTES:
1)THE PROPERTY OWNER, OWNER'S REPRESENTATIVE, DEVELOPER, DESIGN ENGINEER, GENERAL CONTRACTOR,
SUB-CONTRACTORS, OR SIMILAR TITLE FOR THE DEVELOPING ENTITY (HERE AFTER REFERRED TO AS THE DEVELOPER) HAS
PROVIDED THESE EROSION CONTROL MATERIALS IN ACCORDANCE WITH EROSION CONTROL CRITERIA SET FORTH IN THE MANUAL
AS AN ATTEMPT TO IDENTIFY EROSION, SEDIMENT, AND OTHER POTENTIAL POLLUTANT SOURCES ASSOCIATED WITH THESE
CONSTRUCTION ACTIVITIES AND PREVENTING THOSE POLLUTANTS FROM LEAVING THE PROJECT SITE AS AN ILLICIT DISCHARGE.
FULL CITY REQUIREMENTS AND ARE OUTLINED AND CLARIFIED IN THE MANUAL UNDER CHAPTER 4: CONSTRUCTION CONTROL
MEASURES AND SHOULD BE USED TO IDENTIFY AND DEFINE WHAT IS NEEDED ON A PROJECT.
2)THE DEVELOPER SHALL MAKE THEMSELVES THOROUGHLY FAMILIAR WITH THE PROVISIONS AND THE CONTENT OF THE
SPECIFICATIONS LAID OUT IN THE MANUAL, THE DEVELOPMENT AGREEMENT, THE EROSION CONTROL MATERIALS COMPILED FOR
THIS PROJECT, AND THE FOLLOWING NOTES AS ALL THESE MATERIALS ARE APPLICABLE TO THIS PROJECT.
3)THE DEVELOPER SHALL IMPLEMENT AND MAINTAIN CONTROL MEASURES FOR ALL POTENTIAL POLLUTANTS FROM THE START OF
LAND DISTURBING ACTIVITIES UNTIL FINAL STABILIZATION OF THE CONSTRUCTION SITE.
4)THE CITY EROSION CONTROL INSPECTOR SHALL BE NOTIFIED AT LEAST TWENTY-FOUR (24) HOURS PRIOR TO THE DESIRED START
OF ANY CONSTRUCTION ACTIVITIES ON THIS SITE TO ALLOW ADEQUATE TIME FOR ON-SITE CONFIRMATION (INITIAL INSPECTION
WHICH CAN TAKE UP TO TWO BUSINESS DAYS AFTER RECEIVING THE REQUEST) THAT THE SITE IS IN FACT PROTECTED FROM
SEDIMENT AND POLLUTANTS DISCHARGES OFF SITE. PLEASE CONTACT EROSION@FCGOV.COM EARLY TO SCHEDULE THOSE
INITIAL EROSION CONTROL INSPECTIONS WELL IN ADVANCE SO THAT DEMOLITION, CLEARING, GRUBBING, TREE REMOVAL, AND
SCRAPING MAY BEGIN WITHOUT DELAY. FAILURE TO RECEIVE AN ON-SITE CONFIRMATION BEFORE CONSTRUCTION ACTIVITIES
COMMENCE IS AN AUTOMATIC “NOTICE OF VIOLATION” AND CAN RESULT IN FURTHER ENFORCEMENT ACTIONS.
5)THE DEVELOPER SHALL PROACTIVELY PROVIDE ALL APPROPRIATE CONTROL MEASURES TO PREVENT DAMAGE TO ADJACENT
DOWNSTREAM AND LEEWARD PROPERTIES. THIS INCLUDES BUT IS NOT LIMITED TO: TREES, SHRUBS, LAWNS, WALKS, PAVEMENTS,
ROADWAYS, STRUCTURES, CREEKS, WETLANDS, STREAMS, RIVERS, AND UTILITIES THAT ARE NOT DESIGNED FOR REMOVAL,
RELOCATION, OR REPLACEMENT IN THE COURSE OF CONSTRUCTION.
6)AT ALL TIMES THE DEVELOPER SHALL BE RESPONSIBLE TO ENSURE ADEQUATE CONTROL MEASURES ARE DESIGNED, SELECTED,
INSTALLED, MAINTAIN, REPAIRED, REPLACED, AND ULTIMATELY REMOVED IN ORDER
TO PREVENT AND CONTROL EROSION SUSPENSION, SEDIMENT TRANSPORTATION, AND POLLUTANT DISCHARGE AS A RESULT OF
CONSTRUCTION ACTIVITIES ASSOCIATED WITH THIS PROJECT.
7)ALL APPLICABLE CONTROL MEASURES BASED UPON THE SEQUENCING AND/OR PHASING OF THE PROJECT SHALL BE INSTALLED
PRIOR TO THOSE CONSTRUCTION ACTIVITIES COMMENCING.
8)AS DYNAMIC CONDITIONS (DUE TO THE NATURE, TIMING, SEQUENCE, AND PHASING OF CONSTRUCTION) IN THE FIELD MAY
WARRANT CONTROL MEASURES IN ADDITION, OR DIFFERENT, TO WHAT IS SHOWN ON THESE PLANS, THE DEVELOPER SHALL AT
ALL TIMES BE RESPONSIBLE TO IMPLEMENT THE CONTROL MEASURES THAT ARE MOST EFFECTIVE WITH THE CURRENT STATE
AND PROGRESS OF CONSTRUCTION. THE DEVELOPER SHALL IMPLEMENT WHATEVER MEASURES ARE DETERMINED NECESSARY,
AND/OR AS DIRECTED BY THE CITY EROSION CONTROL INSPECTOR. THE DEVELOPER SHALL INSURE THAT ALL EROSION CONTROL
PLANS (MAPS) OR SWMP DOCUMENTS ARE UPDATED TO REFLECT THE CURRENT SITE CONDITIONS, WITH UPDATES BEING
INITIALED AND DATED. THESE SITE INSPECTIONS AND SITE CONDITION UPDATES SHALL BE MADE AVAILABLE UPON REQUEST BY
THE CITY.
9)ALL LISTINGS, PROVISIONS, MATERIALS, PROCEDURES, ACTIVITIES, SITE WORK AND THE LIKE ARTICULATED IN THIS OR OTHER
WRITTEN SITE-SPECIFIC DOCUMENTS (INCLUDING BUT NOT LIMITED TO THE EROSION CONTROL REPORTS, DEVELOPMENT
AGREEMENTS, LANDSCAPE, AND DRAINAGE MATERIALS) SHALL MEET OR EXCEED THE MOST RESTRICTIVE LANGUAGE FOR CITY,
COUNTY, STATE, AND FEDERAL REGULATIONS WITH REGARDS TO EROSION, SEDIMENT, POLLUTANT, AND OTHER POLLUTION
SOURCE CONTROL MEASURES. THE DEVELOPER SHALL BE RESPONSIBLE TO COMPLY WITH ALL OF THESE AFOREMENTIONED
LAWS AND REGULATIONS.
10)THE DEVELOPER SHALL ENSURE THAT ALL APPROPRIATE PERMITS (CDPS GENERAL PERMIT STORMWATER DISCHARGES
ASSOCIATED WITH CONSTRUCTION ACTIVITY, DEWATERING, CLEAN WATER ACT, ARMY CORPS OF ENGINEERS' 404 WETLANDS
MITIGATION PERMIT, ETC.) HAVE BEEN ATTAINED PRIOR TO THE RELEVANT ACTIVITY HAS BEGUN. THESE PERMITS OR COPIES
SHALL BE MADE AVAILABLE UPON REQUEST BY THE CITY.
11)THE DEVELOPER SHALL FURNISH ALL CONVENIENCES AND ASSISTANCE TO AID THE EROSION CONTROL INSPECTORS OF
MATERIALS, WORKMANSHIP, RECORDS, AND SELF-INSPECTIONS, ETC. OF THE CONTROL MEASURES INVOLVED IN THE
CONSTRUCTION ACTIVITIES.
12)THE DEVELOPER SHALL REQUEST CLARIFICATION OF ALL APPARENT SITE CONSTRUCTION ISSUES THAT MAY ARISE DUE TO
INCONSISTENCIES IN CONSTRUCTION PLANS FOR THE SITE OR SITE CONDITIONS AROUND THE SELECTED CONTROL MEASURES
BY CONTACTING THE EROSION CONTROL INSPECTOR. THE EROSION CONTROL INSPECTOR WILL NOT BE RESPONSIBLE FOR ANY
EXPLANATIONS, INTERPRETATIONS, OR SUPPLEMENTARY DATA PROVIDED BY OTHERS.
13)ALL CONTROL MEASURES SHALL BE INSTALLED IN ACCORDANCE WITH THE MANUAL.
14)THE CITY RESERVES THE RIGHT TO REQUIRE ADDITIONAL CONTROL MEASURES AS SITE CONDITIONS WARRANT, TO THE EXTENT
AUTHORIZED BY RELEVANT LEGAL AUTHORITY.
15)AS WITH ANY CONSTRUCTION STANDARDS, OCCASIONS MAY ARISE WHERE THE MINIMUM EROSION CONTROL STANDARDS ARE
EITHER INAPPROPRIATE OR CANNOT BE JUSTIFIED. IN THESE CASES, A VARIANCE TO THESE STANDARDS MAY BE APPLIED FOR
PURSUANT TO THE TERMS, CONDITIONS, AND PROCEDURES OF THE MANUAL.
16)INSPECTION. THE CONTRACTOR SHALL INSPECT SITE POLLUTANT SOURCES AND IMPLEMENT CONTROL MEASURES AT A MINIMUM
OF ONCE EVERY TWO WEEKS DURING CONSTRUCTION AND WITHIN 24 HOURS FOLLOWING A PRECIPITATION EVENT.
DOCUMENTATION OF EACH INSPECTION SHALL BE RECORDED AND RETAINED BY THE CONTRACTOR.
17)ALL TEMPORARY CONTROL MEASURES SHALL BE CLEANED, REPAIRED, OR RECONSTRUCTED AS NECESSARY IN ORDER TO
ASSURE CONTINUAL 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 DRAINAGE WAY.
18)ANY CONTROL MEASURE MAY BE SUBSTITUTED FOR ANOTHER STANDARD CONTROL MEASURE SO LONG AS THAT CONTROL
MEASURE IS EQUAL TO, OR OF GREATER PROTECTION THAN THE ORIGINAL CONTROL MEASURE THAT WAS TO BE USED IN THAT
LOCATION. (EX. SILT FENCE, FOR WATTLES, OR FOR COMPACT BERMS) WATTLE ALONE ON COMMERCIAL CONSTRUCTION SITES
HAVE SHOWN TO BE AN INEFFECTIVE SUBSTITUTE FOR SILT FENCE OR COMPACT BERMS UNLESS IT IS ACCOMPANIED BY A
CONSTRUCTION FENCE TO PREVENT VEHICLE TRAFFIC.
19)ANY IMPLEMENTATION OR REPLACEMENT OF EXISTING CONTROL MEASURES FOR A NON-STANDARD CONTROL, OR ALTERNATIVE
CONTROL MEASURE, SHALL REQUIRE THE REVIEW AND ACCEPTANCE BY THE CITY EROSION CONTROL STAFF BEFORE THE
MEASURE WILL BE ALLOWED TO BE USED ON THIS PROJECT. THESE CONTROL MEASURES' DETAILS SHALL BE SUBMITTED,
REVIEWED AND ACCEPTED TO BE IN ACCORDANCE WITH THE EROSION CONTROL CRITERIA BASED UPON THE FUNCTIONALITY AND
EFFECTIVENESS IN ACCORDANCE WITH SOUND ENGINEERING AND HYDROLOGICAL PRACTICES.
LAND DISTURBANCE, STOCKPILES, AND STORAGE OF SOILS
20)THERE SHALL BE NO EARTH-DISTURBING ACTIVITY OUTSIDE THE LIMITS DESIGNATED ON THE ACCEPTED PLANS. OFF ROAD
STAGING AREAS OR STOCKPILES MUST BE PREAPPROVED BY THE CITY. DISTURBANCES BEYOND THESE LIMITS WILL BE
RESTORED TO ORIGINAL CONDITION.
21)PRE-DISTURBANCE VEGETATION SHALL BE IDENTIFIED, 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. THIS SHOULD INCLUDE SEQUENCING AND PHASING
CONSTRUCTION ACTIVITIES IN A WAY SO THAT THE SOIL IS NOT EXPOSED FOR LONG PERIODS OF TIME BY SCHEDULE OR LIMIT
GRADING TO SMALL AREAS. THIS SHOULD ALSO INCLUDE WHEN PRACTICAL ADVANCING THE SCHEDULE ON STABILIZATION
ACTIVITIES SUCH THAT LANDSCAPING TAKES PLACE SHORTLY IF NOT IMMEDIATELY AFTER GRADING HAS OCCURRED.
VEGETATION EFFORTS SHALL START AS SOON AS POSSIBLE TO RETURN THE SITE TO A STABILIZED CONDITION. SENSITIVE AREAS
SHOULD AVOID CLEARING AND GRADING ACTIVITIES AS MUCH POSSIBLE.
22)ALL EXPOSED SOILS OR DISTURBED AREAS ARE CONSIDERED A POTENTIAL POLLUTANT AND SHALL HAVE CONTROL MEASURES
IMPLEMENTED ON THE SITE TO PREVENT MATERIALS FROM LEAVING THE SITE.
23)ALL SOILS EXPOSED DURING LAND DISTURBING ACTIVITY (STRIPPING, GRADING, UTILITY INSTALLATIONS, STOCKPILING, FILLING,
ETC.) SHALL BE KEPT IN A ROUGHENED CONDITION AT ALL TIMES BY EQUIPMENT TRACKING, SCARIFYING OR DISKING THE
SURFACE ON A CONTOUR WITH A 2 TO 4 INCH MINIMUM VARIATION IN SOIL SURFACE UNTIL MULCH, VEGETATION, AND/OR OTHER
PERMANENT EROSION CONTROL IS INSTALLED.
24)NO SOIL STOCKPILE SHALL EXCEED TEN (10) FEET IN HEIGHT. ALL SOIL STOCKPILES SHALL BE PROTECTED FROM SEDIMENT
TRANSPORT THROUGH THE USE OF SURFACE ROUGHENING, WATERING, AND DOWN GRADIENT PERIMETER CONTROLS. ALL SOIL
STOCKPILES SHALL BE PROTECTED FROM SEDIMENT TRANSPORT BY WIND IN ACCORDANCE WITH MUNICIPAL CODE §12-150. ALL
STOCKPILES SHALL BE FLATTENED TO MEET GRADE OR REMOVED FROM SITE AS SOON AS PRACTICAL, AND NO LATER THAN THE
COMPLETION OF CONSTRUCTION ACTIVITIES OR ABANDONMENT OF THE PROJECT. ALL OFF-SITE STOCKPILE STORAGE LOCATIONS
IN CITY LIMITS SHALL HAVE A STOCKPILE PERMIT FROM THE CITY ENGINEERING DEPARTMENT PRIOR TO USING THE AREA TO
STORE MATERIAL. IF FREQUENT ACCESS FROM HARDSCAPE TO THE STOCKPILE IS NEEDED A STRUCTURAL TRACKING CONTROL
MEASURE SHALL BE IMPLEMENTED.
25)ALL REQUIRED CONTROL MEASURES SHALL BE INSTALLED PRIOR TO ANY LAND DISTURBING ACTIVITY (STOCKPILING, STRIPPING,
GRADING, ETC.). ALL OF THE REQUIRED EROSION CONTROL MEASURES MUST BE INSTALLED AT THE APPROPRIATE TIME IN THE
CONSTRUCTION SEQUENCE AS INDICATED IN THE APPROVED PROJECT SCHEDULE, CONSTRUCTION PLANS, AND EROSION
CONTROL REPORT.
26)ALL INLETS, CURB-CUTS, CULVERTS, AND OTHER STORM SEWER INFRASTRUCTURE WHICH COULD BE POTENTIALLY IMPACTED BY
CONSTRUCTION ACTIVITIES SHALL BE PROTECTED WITH CONTROL MEASURES. MATERIAL ACCUMULATED FROM THIS CONTROL
MEASURE SHALL BE PROMPTLY REMOVED AND IN CASES WHERE THE PROTECTION HAS FAILED, THE PIPES SHALL BE
THOROUGHLY CLEANED OUT.
27)ALL STREAMS, STREAM CORRIDORS, BUFFERS, WOODLANDS, WETLANDS, OR OTHER SENSITIVE AREAS SHALL BE PROTECTED
FROM IMPACT BY ANY CONSTRUCTION ACTIVITY THROUGH THE USE OF CONTROL MEASURES.
28)ALL EXPOSED DIRT SHALL HAVE PERIMETER CONTROL. ANY PERIMETER CONTROLS THAT DRAIN OFF OR HAS THE ABILITY TO BE
TRACKED ONTO THE NEARBY HARDSCAPE SHALL HAVE SOME FORM OF EFFECTIVE SEDIMENT CONTROL AS THE, OR AS PART OF
THE, PERIMETER CONTROL.
29)ALL EXPOSED SLOPES SHOULD BE PROTECTED. ALL EXPOSED STEEP SLOPES (STEEPER THAN 3:1 H:V) SHALL BE PROTECTED
FROM EROSION AND SEDIMENT TRANSPORT THROUGH USE OF CONTROL MEASURES.
30)NO SOILS SHALL REMAIN EXPOSED BY LAND DISTURBING ACTIVITY FOR MORE THAN THIRTY (30) DAYS AFTER ACTIVITY HAS
CEASED BEFORE REQUIRED TEMPORARY SEEDING OR PERMANENT EROSION CONTROL (E.G. SEED/MULCH, LANDSCAPING, ETC.) IS
INSTALLED. THIS IS NOT JUST LIMITED TO PROJECTS THAT ARE ABANDONED; THIS INCLUDES ANY PROJECT THAT IS TEMPORARILY
HALTED AND NO IMMEDIATE ACTIVITY IS TO RESUME WITHIN THE NEXT THIRTY (30) DAYS, UNLESS OTHERWISE APPROVED BY THE
CITY EROSION CONTROL INSPECTOR. DURING A SEASON WHEN SEEDING DOES NOT PRODUCE VEGETATIVE COVER, ANOTHER
TEMPORARY EROSION CONTROL SHALL BE IMPLEMENTED WITH OR UNTIL TEMPORARY SEEDING OR PERMANENT EROSION
CONTROL CAN BE PERFORMED.
31)ALL INDIVIDUAL LOTS SHALL HAVE EFFECTIVE SEDIMENT CONTROLS LOCATED ON THE STREET SIDE AND ANY DOWN GRADIENT
SIDE. TYPICALLY MOST LOTS DRAIN TO THE FRONT YET ON THOSE CASES WHERE HOUSES ARE ALONG A POND OR DRAINAGE
SWALE HAVE THE LOT DRAIN IN A DIFFERENT DIRECTION THAN THE STREET, THOSE INDIVIDUAL LOTS WILL NEED PROTECTION ON
THAT DOWN GRADIENT SIDE TO PREVENT SEDIMENT FROM LEAVING THE LOT. SEE THE INDIVIDUAL LOT DETAILS FOR FURTHER
CLARIFICATION.
VEHICLE TRACKING
32)AT ALL POINTS WHERE VEHICLES EXIT OR LEAVE THE EXPOSED DIRT AREA ON TO A HARDSCAPE OR SEMI HARDSCAPE
(CONCRETE, ASPHALT, ROAD BASE, ETC.) SHALL HAVE INSTALLED AT LEAST ONE STRUCTURAL TRACKING CONTROL MEASURE TO
PREVENT VEHICLE TRACKING. ALL AREAS NOT PROTECTED BY AN ADEQUATE PERIMETER CONTROL SHALL BE CONSIDERED A
POINT WHERE VEHICLES EXIT THE SITE. ACCESS POINTS SHOULD BE LIMITED TO AS FEW ENTRANCES AS POSSIBLE (ALL
PERIMETER AREAS SHALL BE PROTECTED FROM TRACKING ACTIVITIES).
33)IN ALL AREAS THAT THE STRUCTURAL TRACKING CONTROL MEASURES FAIL TO PREVENT VEHICLE TRACKING, COLLECTION AND
PROPER DISPOSAL OF THAT MATERIAL IS REQUIRED. ALL INLETS LOCATED NEAR ACCESS POINTS AND AFFECTED BY TRACKING
ACTIVITIES SHALL BE PREVENTED FROM THE INTRODUCTION OF SEDIMENT INTO THE DRAINAGE SYSTEM.
34)CITY MUNICIPAL CODE §20-62, AMONG OTHER THINGS, PROHIBITS THE TRACKING, DROPPING, OR DEPOSITING OF SOILS OR ANY
OTHER MATERIAL ONTO CITY STREETS BY OR FROM ANY SOURCE. CITY MUNICIPAL CODE, §26-498, AMONG OTHER THINGS,
PROHIBITS THE DISCHARGE OF POLLUTANTS ON PUBLIC OR PRIVATE PROPERTY IF THERE IS A SIGNIFICANT POTENTIAL FOR
MIGRATION OF SUCH POLLUTANT. THEREFORE, ALL TRACKED OR DEPOSITED MATERIALS (INTENTIONAL OR INADVERTENT) ARE
NOT PERMITTED TO REMAIN ON THE STREET OR GUTTER AND SHALL BE REMOVED AND LEGALLY DISPOSED OF BY THE
DEVELOPER IN A TIMELY AND IMMEDIATE MANNER. DIRT RAMPS INSTALLED IN THE CURB-LINES ARE NOT EXEMPT TO THESE
SECTIONS OF CODE AND SHALL NOT BE PERMITTED IN THE STREET RIGHT OF WAY (PUBLIC OR PRIVATE).
35)IF REPEATED DEPOSIT OF MATERIAL OCCURS ON A SITE, ADDITIONAL STRUCTURAL TRACKING CONTROLS MAY BE REQUIRED OF
THE DEVELOPER BY THE CITY EROSION CONTROL INSPECTOR.
LOADING AND UNLOADING OPERATIONS
36)THE DEVELOPER SHALL APPLY CONTROL MEASURE TO LIMIT TRAFFIC (SITE WORKER OR PUBLIC) IMPACTS AND PROACTIVELY
LOCATE MATERIAL DELIVERED TO THE SITE IN CLOSE PROXIMITY TO THE WORK AREA OR IMMEDIATELY INCORPORATED IN THE
CONSTRUCTION TO LIMIT OPERATIONAL IMPACTS TO DISTURBED AREAS, VEHICLE TRACKING, AND SEDIMENT DEPOSITION THAT
COULD IMPACT WATER QUALITY.
OUTDOOR STORAGE OR CONSTRUCTION SITE MATERIALS, BUILDING MATERIALS, FERTILIZERS, AND CHEMICALS
37)ANY MATERIALS OF A NON-POLLUTING NATURE (STEEL, ROCK, BRICK, LUMBER, ETC.) SHALL BE INSPECTED FOR ANY RESIDUE
COMING OFF THE MATERIAL DURING ROUTINE INSPECTION AND WILL GENERALLY BE LOCATED WHERE PRACTICAL AT LEAST FIFTY
(50) FEET FROM ANY PERMANENT OR INTERIM DRAINAGE WAYS.
38)ANY HIGH ENVIRONMENTAL IMPACT POLLUTANT MATERIALS THAT HAVE A HIGH LIKELIHOOD TO RESULT IN DISCHARGE WHEN IN
CONTACT WITH STORMWATER (LUBRICANTS, FUELS, PAINTS, SOLVENTS, DETERGENTS, FERTILIZERS, CHEMICAL SPRAYS, BAGS OF
CEMENT MIX, ETC.) SHOULD NOT BE KEPT ON SITE WHERE PRACTICAL. WHEN NOT PRACTICAL, THEY SHOULD BE STORED INSIDE
(VEHICLE, TRAILER, CONNEX, BUILDING, ETC.) AND OUT OF CONTACT WITH STORMWATER OR STORMWATER RUNOFF. WHERE NOT
AVAILABLE, THEY SHALL BE STORED OUTSIDE IN A RAISED (HIGH SPOTS OR ON PALLETS), COVERED (PLASTIC OR TARPED), AND
SEALED (LEAK PROOF CONTAINER) IN SECONDARY CONTAINMENT LOCATION. THE SECONDARY CONTAINMENT OR OTHER
CONTROL MEASURE SHALL BE ADEQUATELY SIZED, LOCATED, WHERE PRACTICAL, AT LEAST FIFTY (50) FEET FROM ANY
PERMANENT OR INTERIM STORMWATER STRUCTURES OR DRAINAGE WAYS AND SHALL BE MONITORED AS PART OF THE ROUTINE
INSPECTIONS.
VEHICLE AND EQUIPMENT MAINTENANCE AND FUELING
39)PARKING, REFUELING, AND MAINTENANCE OF VEHICLES AND EQUIPMENT SHOULD BE LIMITED IN ONE AREA OF THE SITE TO
MINIMIZE POSSIBLE SPILLS AND FUEL STORAGE AREAS. THIS AREA SHALL BE LOCATED, WHERE PRACTICAL, AT LEAST FIFTY (50)
FEET FROM ANY PERMANENT OR INTERIM STORMWATER STRUCTURES OR DRAINAGE WAYS AND SHALL BE MONITORED AS PART
OF THE ROUTINE INSPECTIONS. ALL AREAS SHALL KEEP SPILL KITS AND SUPPLIES CLOSE.
SIGNIFICANT DUST OR PARTICULATE GENERATING PROCESS
40)THE PROPERTY MUST BE ACTIVELY PREVENTING THE EMISSION OF FUGITIVE DUST AT ALL TIMES DURING CONSTRUCTION AND
VEGETATION ACTIVITIES. ALL LAND DISTURBING ACTIVITIES THAT RESULT IN FUGITIVE DUST SHALL BE IN ACCORDANCE WITH
MUNICIPAL CODE §12-150 TO REDUCE THE IMPACTS TO ADJACENT PROPERTIES AND COMMUNITY HEALTH. ALL REQUIRED
PRACTICES SHALL BE IMPLEMENTED AND ADDITIONAL ONES SHALL BE FOLLOWED. THESE PRACTICES INCLUDE WATERING THE
SITES AND DISCONTINUING CONSTRUCTION ACTIVITIES UNTIL THE WIND SUBSIDES AS DETERMINED BY ANY CITY INSPECTORS.
CONCRETE TRUCK / EQUIPMENT WASHING, INCLUDING THE CONCRETE TRUCK CHUTE AND ASSOCIATED FIXTURES AND EQUIPMENT
41)ALL CONCRETE AND EQUIPMENT WASHING SHALL USE STRUCTURAL CONTROL MEASURES APPROPRIATE TO THE VOLUME OF
WASH AND FREQUENCY OF USE. THESE CONTROL MEASURES SHALL BE LOCATED, WHERE PRACTICAL, AT LEAST FIFTY (50) FEET
FROM ANY PERMANENT OR INTERIM STORMWATER STRUCTURES OR DRAINAGE WAYS AND SHALL BE MONITORED AS PART OF
THE ROUTINE INSPECTIONS. THESE AREAS SHALL BE CLEARLY IDENTIFIED AND PROTECTED FROM ANY WASH FROM LEAVING THE
CONTROL MEASURE. IF FREQUENT ACCESS FROM HARDSCAPE TO THE CONTROL MEASURE IS TO OCCUR, A STRUCTURAL
TRACKING CONTROL MEASURE SHALL BE IMPLEMENTED. THESE CONTROL MEASURES SHALL BE FREQUENTLY CLEANED OUT.
42)THE DEVELOPER IS RESPONSIBLE FOR ENSURING WASHING ACTIVITY IS TAKING PLACE AT THE APPROPRIATE CONTROL MEASURE
AND SITE WORKERS ARE NOT WASHING OR DUMPING WASH WATER ON TO THE DIRT OR OTHER UNCONTROLLED LOCATIONS.
DEDICATED ASPHALT AND CONCRETE BATCH PLANTS
43)DEDICATED ASPHALT AND CONCRETE BATCH PLANTS ARE NOT ACCEPTABLE ON CONSTRUCTION SITES WITHIN THE CITY OF FORT
COLLINS WITHOUT AN EXPRESSED WRITTEN REQUEST AND PLAN TO REDUCE POLLUTANTS ASSOCIATED WITH THAT TYPE OF
ACTIVITY AND APPROVAL BY THE CITY OF FORT COLLINS SPECIFICALLY THE EROSION CONTROL INSPECTOR. THE DEVELOPER
SHALL INFORM THE EROSION CONTROL INSPECTION STAFF OF ANY DEDICATED ASPHALT, OR CONCRETE BATCH PLANTS THAT IS
TO BE USED ON SITE.
CONCRETE SAW CUTTING MATERIALS
44)SAW CUTTING MATERIAL SHALL BE IN ACCORDANCE WITH MUNICIPAL CODE §12-150 FOR AIR EMISSIONS AND ALL WATER
APPLICATIONS TO THE SAW CUTTING SHALL PREVENT MATERIAL FROM LEAVING THE IMMEDIATE SITE AND COLLECTED. THESE
CUTTING LOCATIONS, ONCE DRIED, SHALL BE SWEPT AND SCRAPED OF ALL MATERIAL AND SHALL HAVE PROPER AND LEGAL
DISPOSAL.
WASTE MATERIALS STORAGE AND SANITARY FACILITIES
45)TRASH, DEBRIS, MATERIAL SALVAGE, AND/OR RECYCLING AREAS SHALL BE, WHERE PRACTICAL, AT LEAST FIFTY
(50)FEET FROM ANY PERMANENT OR INTERIM STORMWATER STRUCTURES OR DRAINAGE WAYS AND SHALL BE MONITORED AS
PART OF THE ROUTINE INSPECTIONS. THESE FACILITIES SHOULD BE LOCATED OUT OF THE WIND AND COVERED AS ABLE. WHERE
NOT ABLE TO COVER, LOCATING SAID AREAS ON THE SIDE OF OTHER STRUCTURES TO REDUCE EXPOSURE TO WINDS, AND
FOLLOW MAXIMUM LOADING GUIDELINES AS MARKED ON THE CONTAINER. THE DEVELOPER IS REQUIRED TO PRACTICE GOOD
HOUSEKEEPING TO KEEP THE CONSTRUCTION SITE FREE OF LITTER, CONSTRUCTION DEBRIS, AND LEAKING CONTAINERS.
46)SANITARY FACILITIES SHALL BE PREVENTED FROM TIPPING THROUGH THE USE OF ANCHORING TO THE GROUND OR LASHING TO A
STABILIZED STRUCTURE. THESE FACILITIES SHALL ALSO BE LOCATED AS FAR AS PRACTICAL FROM AN INLET, CURB CUT,
DRAINAGE SWALE OR OTHER DRAINAGE CONVEYANCES TO PREVENT MATERIAL TRANSPORT FROM LEAVING THE LOCAL AREA.
THIS CONSISTS OF THE FACILITY BEING LOCATED, WHERE PRACTICAL, AT LEAST FIFTY (50) FEET FROM ANY PERMANENT OR
INTERIM DRAINAGE WAYS.
OTHER SITE OPERATIONS AND POTENTIAL SPILL AREAS
47)SPILLS: FOR THOSE MINOR SPILLS THAT; ARE LESS THAN THE STATE'S REPORTABLE QUANTITY FOR SPILLS, STAY WITHIN THE
PERMITTED AREA, AND IN NO WAY THREATEN ANY STORMWATER CONVEYANCE, NOTIFY THE CITY OF FORT COLLINS UTILITIES BY
EMAIL AT EROSION@FCGOV.COM OR PHONE (970) 817-4770. FOR ANY SIGNIFICANT, MAJOR, OR HAZARDOUS SPILLS, NOTIFY THE
CITY OF FORT COLLINS UTILITIES BY PHONE ONLY AFTER EMERGENCY RESPONSE (911) HAS BEEN NOTIFIED AND IS ON ROUTE,
COUNTY HEALTH DEPARTMENT (LCDHE) HAS BEEN NOTIFIED THROUGH LARIMER COUNTY SHERIFF DISPATCH (970) 416-1985, AND
THE STATE SPILL HOTLINE INCIDENT REPORTING HAVE BEEN CONTACTED 1-877-518-5608. WRITTEN DOCUMENTATION SHALL BE
PROVIDED TO THE CITY WITHIN 5 DAYS OF THE EVENT. ALL SPILLS SHALL BE CLEANED UP IMMEDIATELY.
48)SELECTION OF “PLASTIC WELDED” EROSION CONTROL BLANKETS SHALL NOT BE USED IN AREAS THAT WILDLIFE, SUCH AS SNAKES,
ARE LIKELY TO BE LOCATED AS THESE HAVE PROVEN TO CAUSE ENTRAPMENT ISSUES.
FINAL STABILIZATION AND PROJECT COMPLETION
49)ANY STORMWATER FACILITIES USED AS A TEMPORARY CONTROL MEASURE WILL BE RESTORED AND STORM SEWER LINES WILL BE
CLEANED UPON COMPLETION OF THE PROJECT AND BEFORE TURNING THE MAINTENANCE OVER TO THE OWNER, HOMEOWNERS
ASSOCIATION (HOA), OR OTHER PARTY RESPONSIBLE FOR LONG TERM MAINTENANCE OF THOSE FACILITY.
50)ALL FINAL STABILIZATION SPECIFICATIONS SHALL BE DONE IN ACCORDANCE WITH THE MANUAL, CHAPTER 4: CONSTRUCTION
CONTROL MEASURES.
51)ALL DISTURBED AREAS DESIGNED TO BE VEGETATED SHALL BE AMENDED, SEEDED & MULCHED, OR LANDSCAPED AS SPECIFIED IN
THE LANDSCAPE PLANS WITHIN 14 WORKING DAYS OF FINAL GRADING.
52)SOIL IN ALL VEGETATED (LANDSCAPED OR SEEDED) AREAS, INCLUDING PARKWAYS AND MEDIANS SHALL COMPLY WITH ALL
REQUIREMENTS SET FORTH IN SECTIONS 12-130 THROUGH 12-132 OF THE CITY MUNICIPAL CODE, AS WELL AS SECTION 3.8.21 FOR
THE CITY LAND USE CODE.
53)ALL SEEDING SHALL REFER TO LANDSCAPING PLANS FOR SPECIES MIXTURE AND APPLICATION RATES AND DEPTHS
REQUIREMENTS.
54)ALL SEED SHALL BE DRILLED WHERE PRACTICAL TO A DEPTH BASED UPON THE SEED TYPE. BROADCAST SEEDING SHALL BE
APPLIED AT DOUBLE THE RATE AS PRESCRIBED FOR DRILL SEEDING AND SHALL BE LIGHTLY HAND RAKED AFTER APPLICATION.
HYDROSEEDING MAY BE SUBSTITUTED FOR DRILL SEEDING ON SLOPES STEEPER THAN 3(H):1(V) OR ON OTHER AREAS NOT
PRACTICAL TO DRILL SEED AND CRIMP AND MULCH. ALL HYDROSEEDING MUST BE CONDUCTED AS TWO SEPARATE PROCESSES
OF SEEDING AND TACKIFICATION.
55)ALL SEEDED AREAS MUST BE MULCHED WITHIN TWENTY-FOUR (24) AFTER PLANTING. ALL MULCH SHALL BE MECHANICALLY
CRIMPED AND OR ADEQUATELY APPLIED TACKIFIER. THE USE OF CRIMPED MULCH OR TACKIFIER MAY REQUIRE MULTIPLE
RE-APPLICATIONS IF NOT PROPERLY INSTALLED OR HAVE WEATHERED OR DEGRADED BEFORE VEGETATION HAS BEEN
ESTABLISHED. AREAS OF EMBANKMENTS HAVING SLOPES GREATER THAN OR EQUAL TO 3H:1V SHALL BE STABILIZED WITH AN
EROSION MAT OR APPROVED EQUAL TO ENSURE SEED WILL BE ABLE TO GERMINATE ON THE STEEP SLOPES. DURING A SEASON
WHEN SEEDING DOES NOT PRODUCE VEGETATIVE COVER, ANOTHER TEMPORARY EROSION CONTROL SHALL BE IMPLEMENTED
ALONG WITH, OR UNTIL, TEMPORARY SEEDING OR PERMANENT EROSION CONTROL CAN BE PERFORMED.
56)THE DEVELOPER SHALL WARRANTY AND MAINTAIN ALL VEGETATIVE MEASURES FOR TWO GROWING SEASONS AFTER
INSTALLATION OR UNTIL SEVENTY PERCENT (70%) VEGETATIVE COVER HAS BEEN ESTABLISHED, WHICHEVER IS LONGER AND
MEETS ALL THE CRITERIA OUTLINED IN THE FORT COLLINS STORMWATER CRITERIA MANUAL CHAPTER 4: CONSTRUCTION
CONTROL MEASURES.
57)THE DEVELOPER SHALL MAINTAIN, MONITOR, REPAIR, AND REPLACE ANY AND ALL APPLICABLE CONTROL MEASURES UNTIL FINAL
STABILIZATION HAS BEEN OBTAINED. ALL CONTROL MEASURES MUST REMAIN UNTIL SUCH TIME AS ALL UPSTREAM CONTRIBUTING
POLLUTANT SOURCES HAVE BEEN VEGETATED OR REMOVED FROM THE SITE. WHEN ANY CONTROL MEASURE IS REMOVED, THE
DEVELOPER SHALL BE RESPONSIBLE FOR THE CLEANUP AND REMOVAL OF ALL SEDIMENT AND DEBRIS FROM THAT CONTROL
MEASURE. AT THE POINT AT WHICH THE SITE HAS BEEN DEEMED STABILIZED AND VERIFIED BY CITY EROSION CONTROL
INSPECTOR, ALL TEMPORARY CONTROL MEASURES CAN THEN BE FULLY REMOVED. ALL MEASURES SHALL BE REMOVED WITHIN 30
DAYS AFTER FINAL STABILIZATION IS ACHIEVED.
58)THE RESPONSIBLE PARTY SHALL MAINTAIN AND KEEP CURRENT ALL PAYMENTS OR RELATED FORMS OF SECURITY FOR THE
EROSION CONTROL ESCROW UNTIL 1) STABILIZATION HAS BEEN REACHED AND 2) ALL CONTROL MEASURES AND/OR BMPS HAVE
SEDIMENT MATERIALS COLLECTED AND THE CONTROL MEASURE REMOVED FROM THE SITE. AT THAT TIME THE SITE WILL BE
CONSIDERED COMPLETED AND ANY REMAINING EROSION CONTROL ESCROW SHALL BE RETURNED TO THE APPROPRIATE
PARTIES.
Project:Disturbed Acres:0.29
EROSION CONTROL BMPs
Estimated
Quantity Units
Unit
Price
Total
Price
205 LF $3.50 $717.50
1 EA $500.00 $500.00
1 EA $150.00 $150.00
Sub-Total:$1,367.50
1.5 x Sub-Total:$2,051.25
Amount of security:$2,051.25
Total Acres x Price/acre:$207.80
$720.00 Sub-Total:$207.80
1.5 x Sub-Total:$311.70
Amount to Re-seed:$311.70
Minimum escrow amount:$1,500.00
Erosion Control Escrow:$2,051.25
“The amount of the security must be based on one and one-half times the estimate of the cost to install the approved measures, or one and one-half times
the cost to re-vegetate the disturbed land to dry land grasses based upon unit cost determined by the City's Annual Revegetation and Stabilization Bid,
whichever is greater. In no instance, will the amount of security be less than one thousand five hundred dollars ($1,500) for residential development or three
thousand dollars ($3,000) for commercial development”
Concrete Washout Area (CWA)
Final Escrow Amount
Inlet Protection (IP)
Erosion and Sediment Control Escrow/Security Calculation
for The City of Fort Collins
BMP Amount
Sediment Control Log (SCL)
Reseeding Amount
Miniumum Escrow Amount
514 Wood Street
Unit Price of Seeding per acre:
7/21/2025 11:16 AM C:\Users\megst\OneDrive\Documents\Keefe Civil\2025-08_Hammersmith Wood\Erosion Control\514 Wood St - Escrow.xls