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STORM WATER POLLUTION PREVENTION PLAN FOR

INDICAN CREEK NATURE CENTER 5300 OTIS ROAD SW

CEDAR RAPIDS, IOWA 52403

GENERAL CONTRACTOR: RYAN COMPANIES US, INC. 14001 UNIVERSITY AVENUE, SUITE 300 CLIVE, IA 50325 CONTACT: MR. NICK ALDRICH PHONE: 515-309-8529 EMAIL: [email protected]

PREPARED BY: SCHNOOR-BONIFAZI ENGINEERING

AND SURVEYING, LC 431 FIFTH AVENUE SW

CEDAR RAPIDS, IA 52404 CONTACT: TRED SCHNOOR

PHONE: 319-298-8888 EMAIL: [email protected]

EROSION CONTROL INSPECTOR &

SWPPP CONTACT: COMPANY:__________________________ CONTACT PERSON:___________________ ADDRESS:___________________________

OWNER:

INDIAN CREEK NATURE CENTER 6665 OTIS ROAD SW CEDAR RAPID, IA 52403

CITY/STATE/ZIP:______________________ TELEPHONE:_________________________ FAX/EMAIL:__________________________ EROSION CONTROL INSPECTOR QUALIFICATIONS:____________________

CONTACT: MR. JOHN MYERS PHONE: 319-362-0664 EMAIL: [email protected]

SWPPP PREPARATION DATE: July 3, 2015 ESTIMATED START DATE: August 10, 2015

ESTIMATED PROJECT COMPLETION DATE: October 31, 2016

INDIAN CREEK NATURE CENTER PROJECT NO. 13039 5300 OTIS ROAD SE, CEDAR RAPIDS, IA 52403

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PART 1 SITE DESCRIPTION

A. Contractor shall be responsible for implementation of this Storm Water Pollution Prevention Plan (SWPPP) within the area identified on the Erosion Control Plan.

B. In addition to the requirements of this SWPPP, Contractor shall comply with all requirements of the General Permit No. 2 and with applicable Iowa DNR and US EPA regulations.

C. Site Description:

1. The site consists of approximately 184 acres (i.e. the entire Indian Creek Nature Center campus), and is located in Section 30, Township 83 North, Range 6, West of the 5th Principal Meridian, Linn County, Iowa. The site is located Bertram Road and north of the Cedar River in southwest Cedar Rapids, Iowa. See Figure 1 below for the project location.

Figure 1 Project Location


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2. Only a portion of the larger Indian Creek Nature Center campus north of Otis Road SE will be impacted by the proposed project. The proposed project includes the construction of a 12,000 square foot nature center building, parking lot, driveways, utilities and stormwater management facilities. It is anticipated that 6-acres of land will be disturbed during construction activities. The Indian Creek Nature Center campus SE is primarily undeveloped and is utilized as natural timber and native prairie areas (99%), with only a small area hard surfaced (1%). The pre-developed runoff coefficient is 0.21. The proposed construction will add approximately 88,525 square feet of hard surfaced to the site. Therefore, the post-developed site will be 2% hard surfaced (impervious) area and 98% open space when project construction is completed. The post-developed runoff coefficient will be 0.22.

3. The intended sequence of major activities is as follows:

a. Install stabilized construction entrance. Add gravel as needed. b. Install perimeter silt fences. c. Install silt fence along down grade sides of the proposed topsoil stockpile area. d. Grubbing, topsoil stripping & stockpiling. e. Earthwork – rough grade the wetland, bio-retention basin and bioswales for use

as sediment traps. f. Earthwork – general grading of building pad, driveways, parking areas, sidewalks

and yard areas. Installation of silt fence around all excess soil stockpiles. g. Install concrete washout. h. Install utilities. Install inlet protection around storm sewer inlets immediately after

each one is constructed. Install rip-rap blankets at storm sewer & subdrain pipe outlets.

i. Temporary seed and mulch the steep slopes (6:1 & steeper) on the project site immediately after rough grading and utility installations in these areas are complete.

j. Temporarily stabilize all areas that construction is not planned to occur on within 21 days with temporary seeding.

k. Building foundation construction and installation of granular base under the building floor slab.

l. Install filter sock diversion to direct sediment laden runoff around the pervious paver parking area prior to placing rock subbase & underlying engineering fabric in the pervious paver parking area.

m. Install granular base under the driveways, parking areas & sidewalks. n. Building construction. o. Install concrete paving and pervious pavers. p. Install stone recharge bed in bioswales & bio-retention basin. q. Place topsoil, engineered soil in bioswales & bio-retention basin, and finish

grading. r. Permanent seeding (including fertilizing and mulching) of all disturbed areas not

hard surfaced. s. Installation of erosion control mat where indicated. t. Permanent stabilization.

4. The Drawings of Proposed Private Site Improvements (i.e. the site construction plans) for

the project show the following:

a. Drainage patterns. b. Approximate slopes after major grading. c. Areas of soil disturbance. d. Locations of structural controls.


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e. Locations of non-structural controls. f. Locations of areas to be stabilized. g. Surface drainage ways. h. Storm water discharge locations.

5. Storm water runoff from the site drains to four point discharge locations. The four discharge points are shown on plan sheet C4.0 and described as follows:

a. Discharge Point #1: Located to the southwest of the new building at the south end of the overflow swale from the proposed manmade wetland. This overflow swale discharges onto the undisturbed native prairie area. Runoff then sheet flows southerly over the native prairie approximately 400-feet to the ditch that runs along the north side of Otis Road SE. The runoff then flows under Otis Road SE in a 60-foot long culvert. The runoff then sheet flows easterly across the wooded area south of Otis Road a distance of approximately 2200-feet before discharging into Indian Creek. The runoff then flows southerly in Indian Creek approximately 300-feet before discharging into the Cedar River.

b. Discharge Point #2: Located to the southwest of the proposed driveway at the end of the overflow swale from proposed bioswale #3. This overflow swale discharges into the road ditch that runs along the north side of Otis Road SE. The runoff then flows under Otis Road SE in a 60-foot long culvert. The runoff then sheet flows easterly across the wooded area south of Otis Road a distance of approximately 1640-feet before discharging into Indian Creek. The runoff then flows southerly in Indian Creek approximately 300-feet before discharging into the Cedar River

c. Discharge Point #3: Located to the northeast of the proposed driveway at the end of the overflow swale from proposed bioswale #2. This overflow swale discharges onto the undisturbed native prairie area. Runoff then sheet flows easterly over the native prairie approximately 130-feet to the ditch that runs along the north side of Otis Road SE. The runoff then flows easterly approximately 600-feet in this ditch before it flows under Otis Road SE in a 60-foot long culvert. The runoff then sheet flows approximately 420-feet to the southeast before it discharges into an existing wetland pond on the Indian Creek Nature Center campus. The pond surface discharges at its southerly corner. Once discharged from the pond, the runoff sheet flows approximately 420-feet easterly before discharging into Indian Creek. The runoff then flows southerly in Indian Creek approximately 300-feet before discharging into the Cedar River.

d. Discharge Point #4: Located to the northeast of the proposed building where the diversion swale that directs flow around the future shop building discharges onto the undisturbed native prairie area. The runoff then sheet flows approximately 940-feet southeasterly across the native prairie before discharging into the ditch that runs along the north side of Otis Road SE. The runoff then flows easterly approximately 240-feet in this ditch before it flows under Otis Road SE in a 60-foot long culvert. The runoff then sheet flows approximately 420-feet to the southeast before it discharges into an existing wetland pond on the Indian Creek Nature Center campus. The pond surface discharges at its southerly corner. Once discharged from the pond, the runoff sheet flows approximately 420-feet easterly before discharging into Indian Creek. The runoff then flows southerly in Indian Creek approximately 300-feet before discharging into the Cedar River.

D. Potential Sources of Pollution


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a. Pollutants that result from clearing, demolition, grading and excavation, and from paving and building materials, that have the potential to be present in storm water runoff are listed in the following table. The table includes information regarding material type, chemical and physical description and specific regulated storm water pollutants associated with each material.

POTENTIAL CONSTRUCTION SITE STORM WATER POLLUTANTS

Material/Chemical Physical

Description Storm Water

Pollutants Location Process for

Containment Pesticides (insecticides, fungicides, herbicides, rodenticides

Various colored to colorless liquids, powders, pellets or grains

Chlorinated hydrocarbons, organophosphates, carbamates and arsenic

Herbicides used for noxious weed control

Certified applicator

Permanent Seeding Fertilizer Liquid or solid grains, nitrogen and phosphorus

Nitrogen, phosphorus,organic substrate

Permanent cover - newly seeded areas

Organic base, slow release forms only, tied up in compost

Temporary Seeding Fertilizer Liquid or solid grains, nitrogen and phosphorus

Nitrogen, phosphorus,organic substrate

Rapid stabilization areas, lawns, berms, soil stockpiles

Managed application, certified installers, quick cover plant materials

Cleaning Solvents Colorless, blue or yellow-green liquid

Perchloroethylene, methylene chloride, trichloroethylene, petroleum distillates

No equipment cleaning allowed in project limits

Tarps, monitor weather for rain and wind

Wastewater from construction

Equipment washing rinse water

Water soil, oil, grease and solids

Equipment washing not allowed in project limits

N/A

Asphalt Black solid Oil, petroleum distillates

Parking areas, drives, roofing

Excess material to be removed from project limits

Concrete White solid Limestone, sand, cement

Curb and gutter, sidewalks, driveways, parking areas, floor slab, foundations, masonry

Designated wash areas or complete haul removal

Glue, adhesives White or yellow liquid

Polymers, epoxies Expansion joints, building construction

Empty container management

Gypsum board White solid or powder

Calcium carbonate Building construction Good house keeping during construction

Joint compound, wall and ceiling texture

White-grey paste or powder

Silica, calcium carbonate

Building construction Good house keeping during construction

Paints Various colored liquids

Metal oxides, Stoddard solvent, talc calcium carbonate, arsenic

Parking lot striping, building construction

Empty container management

Curing compounds Creamy white liquid Naphtha Curb and gutter, sidewalks, parking areas, driveways, floor slab, foundations

Follow manufacturers recommendations

Wood preservatives Clear amber or dark brown liquids

Stoddard solvent, petroleum distillates, arsenic, copper, chromium

Timber pads, building construction

Spill kit shall be kept in staging area & shall include oil absorbing diapers; trained personnel

Hydraulic oil/fluids Brown oily petroleum hydrocarbon

Mineral oil Random leaks broken hoses

Spill kit shall be kept in staging area & shall include oil absorbing diapers; trained personnel


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Gasoline Colorless pale brown or pink liquids

Petroleum hydrocarbon, benzene, ethyl benzene, toluene, xylene, MTBE

Storage Tanks Dual wall tanks or containment pits as secondary containment, Spill kit shall be kept in staging area & shall include oil absorbing diapers; trained personnel, tanks to be locked when not in use.

Diesel fuel Clear blue-green to yellow liquids

Petroleum distillates, oil & grease, naphthalene, xylene


Kerosene Pale yellow liquid petroleum hydrocarbon

Coal oil, petroleum distillates


Anti-freeze/coolant Clear green/yellow liquids

Ethylene glycol, propylene glycol

Random leaks and broken hoses

Trained personnel

Soil erosion Solid particles Soil, sediment Project limits Prevention and Stabilization measures within prescribed periods

b. The following areas were identified and evaluated as potential sources of storm water contamination:

a. Storm System Inlets b. Curb & Gutter c. Access Roads d. Material Storage e. Construction Soil Stockpiles and Staging Areas f. Exposed, disturbed soils (before stabilization)

PART 2 CONTROLS

A. All temporary erosion and sediment control, temporary seeding, and dust control shall be completed in accordance with this SWPPP, the site construction plans and the project’s specifications or as approved by Linn County Erosion Officials.

B. All permanent seeding shall be completed in accordance with this SWPPP, the site construction plans and the project’s specifications or as approved by Linn County Erosion Officials.

C. The Contractor shall limit the surface area of erodible earth during construction activities to the maximum extent possible. The Contractor shall provide immediate permanent or temporary pollution control measures to prevent contamination of adjacent streams of other watercourses, lakes, ponds, or other areas of water impoundment as shown on the plans and described in these specifications.


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D. Prior to beginning any earth disturbing activities the Contractor shall install the stabilized rock construction entrance off Otis Road SE as indicated on plan sheet C4.0. Add gravel as necessary to minimize off-site tracking and dust generation. If vehicles are entering or exiting the site at points other than the construction entrances, the Contractor shall install fencing or flagging to direct traffic to the stabilized construction entrances.

E. Prior to beginning any soil disturbing activities, the Contractor shall furnish & install the perimeter silt fences along the downgrade perimeter of the grading and construction limits as indicated on plan sheet C4.0. Silt fence may be used as long as it effectively prohibits sediment from leaving the site.

F. Prior to beginning vegetation grubbing and topsoil stripping, the Contractor shall install the silt fencing along the down-grade sides of the topsoil stockpile area as indicated on plan sheet C4.0. Silt fence may be used as long as it effectively keeps erosion within the topsoil stockpile area.

G. If any additional excess soil stockpiles are required, the Contractor shall install silt fence along the down-grade sides of their location(s) prior to placing the excess soil. Silt fence may be used as long as it effectively keeps erosion within the stockpile area(s).

H. Seed the topsoil stockpile and any other required excess soil stockpile which will not be disturbed for at least 21 days within 14 days with a temporary seed mix.

I. The Contractor shall stockpile topsoil within the area(s) indicated on plan sheet C4.0. If topsoil and/or excess soil stockpiles are not located where shown on plan sheet C4.0, the Contractor shall install silt fence along the down-grade sides of the stockpile locations prior to beginning any earth disturbing activities and shall amend this SWPPP appropriately. Amendments shall be document in the Corrective Action Log included in the Appendix. Silt fence may be used as long as it effectively keeps erosion within the stockpile areas.

J. The Contractor shall temporary seed and mulch the steep slopes (6:1 & steeper) on the project site immediately after rough grading and utility installations in these areas are complete.

K. The Contractor shall excavate the wetland, bio-retention basin and bioswales and utilize them as sediment traps as early as possible after grading commences. These areas shall be used as sediment traps until the stormwater management features can be completed per plans.

L. Prior to beginning any construction with Portland cement concrete, the Contractor shall install the concrete washout where indicated on plan sheet C4.0. The concrete washout shall remain in place and actively utilized until all construction with Portland cement concrete is completed. Only then may the concrete washout be removed and properly disposed of. The Contractor shall ensure that all Portland cement concrete suppliers and subcontractors utilize the washout for equipment washing and wet concrete disposal. The concrete washout shall be clearly marked with a sign(s) and the General Contractor shall inform all workers of the location of the concrete washout to ensure that it is used.

M. Immediately after each new storm sewer or subdrain pipe outlet is installed, the Contractor shall install a rip-rap blanket around it as indicated on plan sheets C4.0 and C5.0.

N. Immediately after each new storm sewer intake is constructed, the Contractor shall install temporary sediment controls at the new intake as indicated on plan sheet C4.0. Geotextile fabric protection may be used as long as it effectively prohibits sediment from entering the intakes and outlet structures.


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O. As soon as is practicable after completion of rough grading and utility installations in these areas, the Contractor shall place topsoil, finish grade, seed, and install the wood excelsior erosion control mats on the steep slopes of the project site, as shown on plan sheet C4.0.

P. Prior to beginning work on the permeable paver parking areas, the Contractor shall install a minimum 12-inch diameter filter sock along the up-grade side of the permeable paver parking areas as indicated on plan sheet C4.0 to direct runoff away from the permeable paver beds until the contributing drainage area is entirely vegetated. Install the filter sock prior to placing the permeable pavement’s aggregate subbase and underlying geotextile fabric.

Q. Preserve existing vegetation in areas not needed for construction to the maximum extent possible.

R. During construction control dust spreading from all work and staging areas. The contractor shall apply necessary moisture to the construction area and temporary haul roads to prevent the spread of dust.

S. Prior to beginning any domestic well drilling work, place erosion & sediment controls as specified in the sediment & erosion control plan prepared by the domestic well drilling contractor. Refer to Part 6 of this SWPPP for further information.

T. Prior to beginning and geothermal field drilling work, place erosion & sediment controls as specified in the sediment & erosion control plan prepared by the geothermal field drilling contractor. Refer to Part 6 of this SWPPP for further information.

U. As areas reach their final grade, additional silt fences, silt basins, intercepting ditches, sod flumes, letdowns and earth dikes shall be installed as specified in the plans and/or as required by site conditions or the owner’s representative. This includes using silt fence as ditch checks and to protect intakes. If construction activities, site conditions or design modifications require additional erosion control measures, this SWPPP will be amended appropriately by the Contractor. Amendments shall be documented in the Corrective Action Log included in the Appendix.

V. Temporary stabilizing seeding shall be completed as soon as practicable after completion of the final grading. If construction activity is not planned to occur in a disturbed area for at least 21 days, the area shall be stabilized by temporary seeding or mulching within 14 days.

W. As soon as is practicable after completion of the utility and pavement installations, the Contractor shall furnish & spread a minimum of 6-inches of topsoil over all disturbed areas not hard surfaced. After fine grading of the topsoil respread areas, the Contractor shall install permanent seed and mulch in these areas as indicated in the plans and in accordance with the project’s specifications. The seeding contractor shall maintain the seeding until all of the disturbed areas are stabilized with a permanent and uniform perennial vegetative cover. The minimum maintenance period is 30 days.

X. If sediment is deposited outside the project limits, or within newly constructed or existing storm sewer facilities, the contractor shall be responsible to remove the sediment from the location(s) in which it is deposited within 24 hours of the occurrence.

Y. No waste will be disposed of on-site. Good housekeeping measures are to be implemented to eliminate materials, materials packaging, and other litter from leaving the project site.

Z. The Contractor shall prohibit construction and contractor employee’s personal vehicles from entering outside of the construction limits, using fencing or flagging if necessary.


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AA. Off-site tracking of sediment will be minimized by limiting construction traffic entering and exiting the site to using the stabilized construction entrance. The Contractor shall remove tracked sediment from adjacent streets on a daily basis. If vehicles are entering or exiting the site at points other than the construction entrance(s), fencing or flagging shall be installed to direct traffic to the stabilized construction entrance(s).

BB. The Contractor shall dispose of unused construction materials and construction material wastes in compliance with the project’s specifications, applicable state and local waste disposal, sanitary sewer or septic system regulations. In the event of a conflict with other governmental laws, rules or regulations, the more restrictive laws, rules or regulations shall apply.

CC. Sanitary waste will be removed from “porta potties” a minimum of once per week to avoid overflowing. The “porta pottie” is to be located in the contractor’s staging, material storage and equipment storage area(s) as indicated on plan sheet C4.0, near the anticipated stabilized construction driveway for accessible access to site contractors and for cleaning and pumping purposes. The Contractor shall securely stake down the “porta pottie” immediately after it is installed.

DD. Fertilizers will be applied only in the minimum amounts recommended by the manufacturer. Fertilizers will be worked into the soil to limit exposure to storm water. Fertilizers will be stored in a covered shed and partially used bags will be transferred to a sealable bin to avoid spills.

EE. All vehicles on site will be monitored for leaks and receive regular preventive maintenance to reduce the chance of leakage. Petroleum products will be stored in tightly sealed containers which are clearly labeled. Spill kits including oil absorbing diapers will be included with all fueling sources and maintenance activities.

FF. Any asphalt substances used onsite will be applied according to the manufacturer’s recommendation.

GG. All paint containers and curing compounds will be tightly sealed and stored when not required for use. Excess paint will not be discharged to the storm system, but will be properly disposed according to the manufacturer’s instructions.

HH. Materials and equipment necessary for spill cleanup will be kept in the temporary material storage trailer onsite. Equipment will include, but not be limited to, oil absorbing diapers, brooms, dust pans, mops, rags, gloves, goggles, kitty litter, sand, saw dust, and plastic and metal trash containers.

II. Site activities will be in general conformity with the project’s site construction drawings and storm water management plans as approved by State and local officials.

JJ. During the course of this project, it is possible that situations will arise where unknown materials will be encountered. When such situations are encountered, they will be handled according to all federal, state, and local regulations in effect at the time.

KK. If construction activities, site conditions or design modifications require additional erosion control measures, the Contractor shall provide additional erosion control measures to control erosion and prevent sediment from leaving the site. If modifications are required, this SWPPP will be amended appropriately by the Contractor. Amendments shall be documented in the Corrective Action Log included in the Appendix

PART 3 POST CONSTRUCTION CONTROLS


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A. After construction, all disturbed areas on the site not hard surfaced will have a minimum of 6” of topsoil respread and be seeded with a permanent seed mixture to minimize runoff and erosion from the site. Only when all construction activities have been completed and soils have been stabilized, the perimeter controls (silt fence, ditch checks, etc.) can be removed.

B. All roof downspout drains will either be discharged to a splash pad or piped underground to the manmade wetland to prevent scour and erosion of the underlying soils.

C. All of the new storm sewer and subdrain pipe outlets shall discharge onto permanent rip rap structures to dissipate energy and prevent erosion.

D. Hand placed limestone “splash” blocking shall be installed on the downstream side of each of the limestone overflow weirs within the manmade wetland, bioswale #1 and bioswale #2. The “splash” blocking shall be installed along the entire length of each overflow weir.

E. The project includes the construction of a manmade wetland, bio-retention basin, three bioswales, a permeable paver patio and permeable paver parking areas. All new hard surfacing and the majority of disturbed open space will drain to one or more of these stormwater management features. These features were design to limit the post-developed peak discharge to be no more than the pre-developed peak discharge, and also to infiltrate 100% of the increased runoff volume generated by the project. During the 1-year storm, these stormwater management features will infiltrate 100% of the runoff. Therefore, the Cedar Rapids Metro area requirement to retain one-inch of runoff from the site for 24 hours, with a goal of 80% TSS removal, is exceeded.

PART 4 INSPECTION

A. Inspections shall be provided by the Contractor’s qualified personnel, who shall inspect disturbed areas of the construction site that have not been fully stabilized at least once every seven (7) calendar days. The Storm Water Inspection Sheet included in the Appendix of this SWPPP shall be completed for all inspections. All inspection reports shall be made available to authorized personnel from Linn County, Iowa Department of Natural Resources, and/or the Environmental Protection Agency within three hours of request.

B. Silt fence shall be inspected for depth of sediment, tears, to see if the fabric is securely attached to the fence post, to see if water is eroding under or around the silt fence, and to see if the posts are securely in the ground.

C. Filter sock shall be inspected for depth of sediment, tears and to see if water is eroding under or around the filter sock.

D. Sediment traps shall be inspected for depth of sediment and to see if water is eroding around the trap.

E. Disturbed areas and areas used for the storage of materials that are exposed to precipitation shall be observed for evidence of, or the potential for, pollutants entering the drainage system.

F. Structural control measures shall be inspected for depth of sediment (if applicable) and observed to ensure that they are operating correctly.

G. Accessible discharge points shall be observed to determine effectiveness in preventing significant impacts to receiving waters. In particular, the Contractor shall inspect the point discharge locations (Discharge Points #1, #2, #3 & #4) as described in this SWPPP and shown on plan sheet C4.0.


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H. Adjacent existing storm sewer intakes & culverts shall be observed to determine effectiveness in preventing significant impacts to receiving waters.

I. Locations where vehicles enter or exit the site shall be observed for evidence of off-site sediment tracking. If vehicles are entering or exiting the site at points other than the construction entrance(s), fencing or flagging shall be installed to direct traffic to the stabilized construction entrance(s).

J. Temporary and permanent seeding shall be inspected for bare spots and washouts.

K. Based on the results of these inspections, the Contractor shall repair any erosion control structures/devices, replace any washed out seeding or sod and make revisions to the SWPPP as required to protect receiving waters within seven (7) days of the date of such inspection.

L. Results of these inspections shall be recorded on copies of the inspection form provided with this Storm Water Pollution Prevention Plan or other standard format and kept in the Contractor's field office as a part of this SWPPP until the project is completed.

M. Copies of the plan, all inspection reports, and certifications prepared by the Contractor shall be forwarded to the Owner.

PART 5 MAINTENANCE

A. The Contractor is required to maintain all temporary erosion control measures in proper working order, including cleaning, repairing, or replacing them until final stabilization. “Final stabilization” means that all soil disturbing activities have been completed, and that uniform perennial vegetative cover with a density of 70% for the area has been established.

B. Sediment shall be removed from silt fence and/or filter socks when the devices have lost 50% of their capacity. Sediment removal will include disposal in a location where it will not erode into construction areas or water courses. An alternative to this is installing new silt fence or filter sock immediately adjacent and upstream to the filled device, leaving the filled device in place.

C. Sediment deposits shall be removed from inlet protection devices and the inlet protection devices restored to their original dimensions when sediment has accumulated to 2-inches or more in depth at an area intake. Sediment removal will include disposal in a location where it will not erode into construction areas or water courses’

D. Sediment deposits shall be removed from sediment traps once they have lost 50% of their capacity. Sediment removal will include disposal in a location where it will not erode into construction areas or water courses

E. The contractor shall repair any erosion control devices damaged during construction. All repairs, substitutions, additions and modifications to erosion control methods or sediment control methods shall be documented in the weekly inspection report.

F. Clean gravel shall be added to the stabilized construction entrance when it has lost its ability to limit off-site tracking of sediment.

G. Concrete shall be removed from a concrete washout and its volume restored, or the washout completely replaced, when it has lost 75% of its capacity.

H. Add seed and fertilizer where bare spots are apparent in the areas that have been temporarily seeded. Grade and reseed washouts and ruts in the areas that have been stabilized.


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I. Grade and re-seed washouts and ruts in areas that have been permanently stabilized.

PART 6 NON-STORM WATER DISCHARGES

A. It is anticipated that there will be non-storm water discharges that are combined with storm water discharges associated with industrial activity from construction activities. The sources of these non-storm water discharges will include, but are not limited to: discharges from water line flushing; subdrains/tiles; foundation/footing drains, dust control, pavement wash water, water well drilling and geothermal field drilling.

B. Typical water line flushing water shall be discharged into a sediment trap or vegetated filter strip (if available) since chlorine, calcium hypochlorite and sodium hypochlorite are expressly prohibited by Living Building Challenge.

C. The discharge velocity at the outlets of subdrains/tiles and foundation/footing drains shall be dissipated by the use of splash pads or an erosion stone blanket.

D. Pavement washing shall be completed without detergent.

E. For dust control, only use enough water to thoroughly wet the surface, but not enough water to create runoff that could carry sediment away.

F. The domestic water well drilling contractor shall prepare an appropriate erosion & sediment control plan for their work and provide it to the General Contractor. The General Contractor shall attach a copy of the domestic water well drilling erosion & sediment control plan to this SWPPP and make a note of this in the Corrective Action Log.

G. The geothermal field drilling contractor shall prepare an appropriate erosion & sediment control plan for their work and provide it to the General Contractor. The General Contractor shall attach a copy of the geothermal field drilling erosion & sediment control plan to this SWPPP and make a note of this in the Corrective Action Log.

PART 7 IMPLEMENTATION AND CERTIFICATION

A. The Contractor is responsible for the implementation and maintenance of all measures identified in this SWPPP.

B. If construction activities, site conditions or design modifications require additional erosion control measures, this SWPPP will be amended appropriately by the Contractor. Amendments shall be documented in the corrective action log included in the Appendix.

C. The Erosion Control Plan and Storm Water Pollution Prevention Plan (SWPPP) are living documents and are subject to revisions during the active phase of construction. A Linn County Erosion Official and/or a representative from the Iowa DNR and/or the US EPA may instruct the General Contractor to install additional and/or replace existing BMP's in order to accommodate site specific conditions. While a specific element associated with sediment control, erosion control, or stormwater management may not be directly addressed in the SWPPP, all elements related to sediment control, erosion control, and stormwater management must be adequately addressed on the entire site, at all times.

D. Contractor and all subcontractors are required to sign the certification statement one (1) week prior to the start of construction. A copy of this certification statement is included in the Appendix.


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E. The signed copies of the certification statement shall be kept with this SWPPP in the Contractor's field office until the project is completed.

F. A copy of this SWPPP, including all reports required by the SWPPP shall be maintained at the construction site by the Contractor from the date of project initiation to the date of final stabilization.

G. A sign/notice must be present on the site with a copy of Notice of Intent to the IDNR and the location of SWPPP or contact information for scheduling viewing times of SWPPP not present on site. SWPPP to be presented to interested party within three hours of being notified.

H. The following items must be completed prior to beginning any construction work:

1. The Contractor shall complete and sign the Notice of Intent, a draft of which is included in the Appendix of this SWPPP.

2. The Contractor shall publish the “Public Notice of Stormwater Discharge” for one day in the Cedar Rapids Gazette.

3. The Contractor shall submit the completed Notice of Intent, an “Affidavit of Publication” from the Cedar Rapids Gazette and application fee to the Iowa DNR.

4. The Contractor shall insert a copy of the completed Notice of Intent, Affidavit of Publication and the NPDES permit issued by the Iowa DNR into the appropriate locations in the Appendix of this SWPPP.

5. The Contractor shall completely fill out the blank lines with the appropriate information on the Cover of, and in Part 7, of this SWPPP.

6. The Contractor and Subcontractors shall complete and sign "Contractor/Subcontractor Certifications" and insert them into the Appendix of this SWPPP. A blank certification is included the Appendix of this SWPPP for the Contractor's use.

I. The following contractors must be recorded in this SWPPP and each must sign a copy of the contractor/subcontractor certification statement included in the Appendix.

1. Grading Contractor:

2. Silt Fence Contractor

3. Seeding Contractor

4. Underground Utility Contractor

5. Paving Contractor

6. Other

7. Other

J. The following dates must be recorded in this SWPPP:

1. Start of Major Grading Activities:

2. Installation of Erosion Control Measures______________________________________

3. Temporary Breaks and Starts in Construction Activity:


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4. Initiation of Stabilization Measures:

K. A copy of this SWPPP, including all reports required by the SWPPP and records of all data used to complete the Notice of Intent to be covered by the permit, will be kept for a period of at least three (3) years from the date that the site is finally stabilized.

PART 8 APPENDIX

A. This Appendix includes the following:

1. NPDES Permit

2. Copy of the Notice of Intent for NPDES Coverage Under General Permit No. 2

3. Copy of Public Notice

4. Contractor/Subcontractor Certification

5. Storm Water Inspection Sheet

6. Corrective Action Log

7. Notice of Discontinuation of a Storm Water Discharge Covered Under Iowa NPDES General Permit No. 2 for Construction Activities


15

INSTRUCTIONS FOR GENERAL CONTRACTOR:

1. INSERT COPY OF NPDES PERMIT ISSUED BY IDNR INTO THE SWPPP APPENDIX AT THIS PAGE MARKER!


16

FOLLOWING IS A PARTIALLY COMPLETED “NOTICE OF INTENT FOR NPDES COVERAGE UNDER GENERAL PERMIT NO. 2”.

INSTRUCTIONS FOR THE GENERAL CONTRACTOR:

1. COMPLETE, AND/OR MODIFY AS NECESSARY, ALL SECTIONS

OF THE “NOTICE OF INTENT”.

2. INSERT A COPY OF THE COMPLETED AND SIGNED “NOTICE OF INTENT” INTO THE SWPPP APPENDIX AT THIS PAGE MARKER!

3. SUBMIT THE “NOTICE OF INTENT”, AFFIDAVITS OF PUBLICATION OF THE “PUBLIC NOTICE”, AND NPDES PERMIT APPLICATION FEE TO THE IOWA DNR AS INDICATED ON THE “NOTICE OF INTENT”.

IOWA DEPARTMENT OF NATURAL RESOURCES ENVIRONMENTAL PROTECTION DIVISION

NOTICE OF INTENT FOR NPDES COVERAGE UNDER GENERAL PERMIT

No. 1 FOR "STORM WATER DISCHARGES ASSOCIATED WITH INDUSTRIAL ACTIVITY"

or No. 2 FOR "STORM WATER DISCHARGES ASSOCIATED WITH INDUSTRIAL ACTIVITY FOR CONSTRUCTION ACTIVITIES"

or No. 3 FOR "STORM WATER DISCHARGE ASSOCIATED WITH INDUSTRIAL ACTIVITY FOR ASPHALT PLANTS, CONCRETE BATCH PLANTS, ROCK CRUSHING PLANTS, AND CONSTRUCTION SAND AND GRAVEL FACILITIES."

IDNR CASHIER’S USE ONLY 0253-542-SW08-0581

PERMIT INFORMATION Has this storm water discharge been previously permitted? Yes ⌧ No

If yes, please list authorization number _________________ Under what General Permit are you applying for coverage? General Permit No. 1 General Permit No. 2 ⌧ General Permit No. 3

PERMIT FEE OPTIONS For coverage under the NPDES General Permit the following fees apply: Annual Permit Fee $175 (per year) Maximum coverage is one year. 3-year Permit Fee $350 Maximum coverage is three years. 4-year Permit Fee $525 Maximum coverage is four years. 5-year Permit Fee $700 Maximum coverage is five years. Checks should be made payable to: Iowa Department of Natural Resources. FACILITY OR PROJECT INFORMATION Enter the name and full address/location (not mailing address) of the facility or project for which permit coverage is requested. NAME: Indian Creek Nature Center

STREET ADDRESS OF SITE: 5300 Otis Road SE

CITY: Cedar Rapids

COUNTY: Linn

STATE: Iowa

ZIP CODE: 52403

CONTACT INFORMATION Give name, mailing address and telephone number of a contact person (Attach additional information on separate pages as needed). This will be the address to which all correspondence will be sent and to which all questions regarding your application and compliance with the permit will be directed. NAME: Ryan Companies US, Inc. ATTN: Mr. Nick Aldrich

ADDRESS: 14001 University Avenue, Suite 300

CITY: Clive

STATE: Iowa

ZIP CODE: 50325

TELEPHONE 515-309-8529

Check the appropriate box to indicate the legal status of the operator of the facility. Federal State Public ⌧ Private Other (specify) __________________

SIC CODE (General Permit No. 1 & 3 Applicants Only) SIC code refers to Standard Industrial Classification code number used to classify establishments by type of economic activity.

Be sure to complete both sides of this form. 542-1415 (Rev. 7/08)

FACILITY LOCATION OR LOCATION OF CONSTRUCTION SITE Give the location by ¼ section, section, township, range, (e.g., NW, 7, T78N, R3W).

1/4 SECTION

SECTION

TOWNSHIP

RANGE

SE

30

T83N

R6W

SW

30

T83N

R6W

OWNER INFORMATION Enter the name and full address of the owner of the facility. NAME: Indian Creek Nature Center ATTN: Mr. John Myers

ADDRESS: 6665 Otis Road SE

CITY: Cedar Rapids

STATE: Iowa

ZIP CODE: 52403

TELEPHONE: 319-362-0664

OUTFALL INFORMATION Discharge start date, i.e., when did/will the site begin operation or 10/1/92, whichever is later: _08/10/2015___________ Is any storm water monitoring information available describing the concentration of pollutants in storm water discharges? Yes ⌧ No NOTE: Do not attach any storm water monitoring information with the application.Receiving water(s) to the first uniquely named waterway in Iowa, (e.g., road ditch to unnamed tributary to Mud Creek to South Skunk River): Storm water from the site discharges to the ditch along the north side of Otis Road SE, to Indian Creek to the Cedar River.

Compliance With The Following Conditions: Yes No

Has the Storm Water Pollution Prevention Plan been developed prior to the submittal of this Notice of Intent and does the plan meet the requirements of the applicable General Permit? (do not submit the SWPPP with the application)

X

Will the Storm Water Pollution Prevention Plan comply with approved State (Section 161A.64, Code of Iowa) or local sediment and erosion plans? (for General Permit 2 only)

X

Have two public notices been published for at least one day, one each in the two newspapers with the largest circulation in the area where the discharge is located, and are the proofs of notice attached? (new applications only)

X

GENERAL PERMIT NO. 2 AND GENERAL PERMIT NO. 3 APPLICANTS COMPLETE THIS SECTION. Description of Project (describe in one sentence what is being constructed): Construction of a new nature center building, parking lot, driveways, utilities and stormwater management features. For General Permit No. 3 - Is this facility to be moved this year? Number of Acres of Disturbed Soil: ___ 6__________

Yes No (Construction Activities Only)Estimated Timetable For Activities / Projects, i.e., approximately when did/will the project begin and end: Begin Grading: August 10, 2015 Final Stabilization: October 31, 2016 CERTIFICATION – ALL APPLICATIONS MUST BE SIGNED Only the following individuals may sign the certification: owner of site, principal executive officer of at least the level of vice- president of the company owning the site, a general partner of the company owning the site, principal executive officer or ranking elected official of the public entity owning the site, any of the above of the general contracting company for construction sites.

MAIL TO:

STORM WATER COORDINATOR

IOWA DEPARTMENT OF NATURAL RESOURCES

502 E. 9TH STREET DES MOINES, IA 50319-0034

I certify under penalty of law that this document was prepared under my direction or supervision in accordance with a system designed to assure that qualified people properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, this information is to the best of my knowledge and belief, true, accurate, and complete. I further certify that the terms and conditions of the general permit will be met. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

NAME: (print or type) X

TITLE: X

SIGNATURE: X

DATE: X


17

FOLLOWING IS A COMPLETED “PUBLIC NOTICE OF STORM WATER DISCHARGE”.

INSTRUCTIONS FOR THE GENERAL CONTRACTOR:

1. MODIFY THE “PUBLIC NOTICE” AS NECESSARY.

2. PUBLISH THE “PUBLIC NOTICE” IN THE AREA NEWSPAPER

WITH THE LARGEST PUBLICATION (I.E. CEDAR RAPIDS GAZETTE) FOR ONE DAY.

3. INSERT COPIES OF THE PROOFS OF PUBLICATION RECEIVED FROM THE NEWSPAPER INTO THE SWPPP APPENDIX AT THIS PAGE MARKER!

4. SUBMIT THE “NOTICE OF INTENT”, AFFIDAVITS OF PUBLICATION OF THE “PUBLIC NOTICE”, AND NPDES PERMIT APPLICATION FEE TO THE IOWA DNR AS INDICATED ON THE “NOTICE OF INTENT”.

PUBLIC NOTICE OF STORM WATER DISCHARGE

Ryan Companies US, Inc. plans to submit a Notice of Intent to the Iowa

Department of Natural Resources to be covered under NPDES General Permit

No. 2 “Storm Water Discharge Associated with Industrial Activity for Construction

Activities”.

The storm water discharge will be from the construction of a new nature center

building, parking lot, driveways, utilities and stormwater management features in

the SE ¼ and SW ¼ of Section 30, Township 83 North, Range 6 West,

Hiawatha, Linn County, Iowa.

Storm water will be discharged from four point sources and will be discharged to

the following streams: Indian Creek.

Comments may be submitted to the Storm Water Discharge Coordinator,

IOWA DEPARTMENT OF NATURAL RESOURCES, Environmental Protection

Division, 900 E. Grand Avenue, Des Moines, IA 50319-0034. The public may

review the Notice of Intent from 8 a.m. to 4:30 p.m., Monday through Friday, at

the above address after it has been received by the department.


STORM WATER POLLUTION PREVENTION PLAN

CONTRACTOR/SUBCONTRACTOR CERTIFICATION

NAME OF PROJECT: INDIAN CREEK NATURE CENTER

"I certify under penalty of law that I understand the terms and conditions of the General National Pollutant Discharge Elimination System (NPDES) permit that authorizes the stormwater discharges associated with industrial activity from the construction site as part of this certification. Further, by my signature, I understand that I am becoming a co-permittee, along with the Owner(s) and other contractors and subcontractors signing such certifications, the Iowa Department of Natural Resources NPDES General Permit No. 2 for "Stormwater Discharge Associated with Industrial Activity for Construction Activities" at the identified site. As a co-permittee, I understand that I, and my Company, are legally required under the Clean Water Act and the Code of Iowa, to ensure compliance with the terms and conditions of the Stormwater Pollution Prevention Plan developed under this NPDES permit and the terms of the NPDES permit." NAME TITLE COMPANY NAME TELEPHONE NO. COMPANY ADDRESS SIGNATURE DATE KEEP A COPY OF THIS SIGNED CERTIFICATION WITH THE STORM WATER POLLUTION PREVENTION PLAN.


STORM WATER INSPECTION SHEET

Site Location

□ Routine Inspection Amount and date of precipitation since last inspection

or

□ Inspection within 24 hours of 0.5 inches or greater rainfall on Date of Inspection Time of inspection and weather conditions YES NO If no, explain 1. Erosion control practices shown on SWPPP

in place and functioning? (mulch, seeding, blankets, etc.)

2. Sediment traps, barriers and basins shown on SWPPP clean and functioning properly?

3. Sediment controls shown on SWPPP in place at site perimeter and storm drain inlets?

4. Discharge points set out in SWPPP free of any noticeable pollutant discharges?

5. Sediment, mud and debris being cleaned from public roads? Is there a stable, rocked entrance at the site? Are there adequate provisions to prevent mud from tracking off site?

6. All exposed slopes protected from erosion through acceptable soil stabilization practices?

7. Temporary stockpiles or construction materials located in approved areas and protected from erosion?

8. Is the site seeded and mulched or blanketed? Includes dates seeded and estimated percentage of cover established.

9. Are dust control measures appropriately implemented?

10. Material handling and storage, and equipment storage and maintenance areas shown on SWPPP clean and free of spills and leaks?

11. On-site traffic routes, parking and storage restricted to designated areas?

12. Are all erosion control devices shown on SWPPP in place and functioning in accordance with the site’s erosion control plan?


Activities required: To be performed by: On or before: Additional observations:

INSPECTION REPORT CERTIFICATION STATEMENT I certify under penalty of law that this document and all attachments were prepared under my direction or supervision

in accordance with a system designed to assure the qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who managed the system, or those persons

directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting false information, including

the possibility of fine and imprisonment for known violations. Inspected by (name, title and qualifications): Signature: KEEP A COPY OF THIS SIGNED STORM WATER INSPECTION SHEET WITH THE STORM WATER POLLUTION PREVENTION PLAN.


CORRECTIVE ACTION LOG

Project Name: SWPPP Contact:

Inspection Date

Inspector Name(s)

Description of BMP Deficiency

Corrective Action Needed (Including Planned Date & Responsible Person)

Date Action Taken & Responsible Person

(over)

NOTICE OF DISCONTINUATION

OF A STORM WATER DISCHARGECOVERED UNDER IOWA NPDES GENERAL PERMIT NO. 2

FOR CONSTRUCTION ACTIVITIES

Name of the owner or facility to which the storm water discharge general permit coverage was issued.

_________________________________________

List the complete permit authorization number for the discharge. This number is provided on the bottom of theauthorization sheet.

IA - _______________---________________

List the date the construction site reached final stabilization.______________________

The following certification must be signed in accordance with the signatory requirements of the general permit (seeback side).

I certify under penalty of law that disturbed soils at the identified facility have been finally stabilized and temporaryerosion and sediment control measures have been removed or will be removed at an appropriate time. I understandthat by submitting this Notice of Discontinuation, I am no longer authorized to discharge storm water associated withindustrial activity for construction activities by Iowa Department of Natural Resources NPDES General Permit No. 2and that discharging pollutants from storm water associated with industrial activity to waters of the United States isunlawful under the Clean Water Act where the discharge is not authorized by an NPDES permit.

I further certify under penalty of law that this document and all attachments were prepared under my direction orsupervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluatedthe information submitted. Based on my inquiry of the person or persons who manage the system, or those personsdirectly responsible for gathering the information, the information submitted is, to the best of my knowledge andbelief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information,including the possibility of fine and imprisonment for known violations.

___________________________________Name (print) ________________________________Title

___________________________________Signature ________________________________Date

Return to: Storm Water CoordinatorDepartment of Natural Resources502 E. 9th StreetDes Moines, IA 50319-0034

Final Stabilization means that all soil disturbing activities at the site have been completed, and that auniform perennial vegetative cover with a density of 70% for the area has been established or equivalentstabilization measures have been employed.

SIGNATORY REQUIREMENTS All Notices of Intent, storm water pollution prevention plans,reports, certifications or information either submitted to the Department or the operator of a largeor medium municipal separate storm sewer system, or that this permit requires be maintained bythe permittee, shall be signed in accordance with rule 567--64.3(8) of the Iowa AdministrativeCode as follows:

64.3(8) Identity of signatories of operation permit applications. The person who signs the applicationfor an operation permit shall be:

a. Corporations. In the case of corporations, a principal executive officer of at least the level ofvice-president.

b. Partnerships. In the case off a partnership, a general partner.

c. Sole proprietorships. In the case of a sole proprietorship, the proprietor.

d. Public facilities. In the case of a municipal, state, or other public facility, by either the principalexecutive officer, or the ranking elected official.

e. Storm water discharge associated with industrial activity from construction activity. In the caseof a storm water discharge associated with industrial activity from construction as identified in 40CFR 122.26(b)(14)(x), either the owner of the site or the general contractor.

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