HomeMy WebLinkAboutCorrespondenceCarmel * Clay
Parks&Recreation
NATIONAL GOLD MEDAL WINNER
AND ACCREDITED AGENCY
September 11, 2020
David Littlejohn
Alternative Transportation Coordinator
City of Carmel
One Civic Square
Carmel, IN 46032
Re.: West Park/1161h Street Perimeter Path
Dear David,
This letter is to confirm Carmel Clay Parks & Recreation's commitment to construct the extension of the
116th Street perimeter path to the western border of West Park by or before 12/31/2022, subject to
approval of budget appropriations from the Carmel/Clay Board of Parks and Recreation (Park Board),
Common Council of the City of Carmel, and/or Clay Township Board. We will also work with the City of
Carmel on placement of a crosswalk to provide connectivity to the existing perimeter trail on the south
side of 116th Street, a shared goal of both CCPR and the City to enhance access to the park from the
west.
The core project in West Park, currently under review for permitting, is being funded jointly by Clay
Township and the Park Board. This project is focused on redevelopment of the original 75 acres of West
Park, including replacement of the destination playground and splash pad that have exceeded their
anticipated lifespans. Plans also include installation of an asphalt trail between the eastern and western
entrances to the park where a paved, multipurpose trail currently does not exist. This will ensure a
perimeter trail is available in all developed areas of the park. Bids for the core project exceeded
available funding, which required some value engineering to bring the project back within budget. We
unfortunately do not have sufficient funds at this time to extend the trail in areas of the park that
currently remain undeveloped.
It is fully anticipated that funding will be available and approved for extension of the trail in 2022. We
look forward to working with the City to enhance trail connectivity within our community.
Sincerely,
Michael W. Klit ing, CPRE
Director of Parks and Recreation/CEO
cc: CCPR Administration & Planning Division for West Park file
1411 E. 116th Street Carmel, IN 46032 1 317.848.7275 1 InTrac: 711 1 carmelclayparks.com
44 East Mifflin Street, Suite 500, Madison, WI 53703 T 608.251.1177 F 608.251.6147
September 21, 2020
Alex Jordan
City of Carmel Engineering Department
One Civic Square
Carmel, IN 46032
Re: West Park: The Core
Carmel-Clay Parks and Recreation
SWPPP Submittal Variance Request
Dear Mr. Jordan,
Below is a summary of requested variances from the City of Carmel Stormwater Technical Standards Manual for the
proposed Carmel-Clay Parks and Recreation West Park project. While City code was followed where practicable,
local site conditions required the following divergences from code requirements, as described herein. The requests
describe the reviewer comments and the nature of the requested variance from code requirements, as well as any
proposed mitigatory practices to ensure compliance with the City of Carmel’s intent. This letter is intended to work in
conjunction with the plan set, dated September 21, 2020, as well as the SWPPP and its appendices.
1. Comment 20: “The technical report needs to include the pre-development watershed map, to include the
drainage area designation corresponding to the designations in the drainage calculations, the area in acres
for each drainage area and any off-site drainage areas that need to be accommodated by the system,
including the fully developed right-of-way per the City of Carmel Thoroughfare Plan…”
Per discussion at the meeting held with City review staff on September 9, including the fully developed right-
of-way is not feasible at this time. A variance is respectfully requested for this comment. The roadway
(116th Street) is located downgradient of the project site and it is not feasible to capture drainage from the
roadway and convey it to BMPs on site without significant regrading, infrastructure modifications and
impacts to regulated wetlands.
2. Comment 32: “The minimum diameter of all storm sewers shall be 12 inches. Under no circumstances shall
the pipe be less than 12-inches diameter, measured as the inside diameter. Minimum diameter for all
subsurface drains shall be six (6) inches.”
Shallow cover conditions associated with topographical constraints limit the use of 12-inch diameter pipes at
some areas. Where pipes are less than 12-inch diameter they are associated with minor conveyance
systems and underdrain conveyance. It is noted that all pipes crossing the connector roadway are at least
12 inches in diameter. As discussed at the meeting held with City review staff on September 9, CCPR is
requesting a variance for the following pipes to be less than 12-inch diameter. The pipes are designated
from structure to structure as identified on the Utility Plans:
1B - END 3
TD3 - 1B
44 East Mifflin Street, Suite 500, Madison, WI 53703 T 608.251.1177 F 608.251.6147
CO5 - CS2
TD4 - END 4
EX CB1 - EX CB2
CO3 - END 6
CB02 - FES07
C07 - END 2
WALL UD - END 1
END 5 - CB03
3. Comment 33: “Minimum allowable slopes for all storm sewers shall be those capable of producing
velocities no less than 2.5 feet per second when the sewer is flowing at full capacity.”
As discussed at the meeting held with City review staff on September 9, topographical constraints limit pipe
slopes, and CCPR is therefore requesting a variance for the following pipes to have a full flow velocity of
less than 2.5 feet per second:
PIPE SIZE (IN.)
SLOPE
(%) MATERIAL
FULL FLOW VELOCITY
(FPS)
1B ‐ END 3 6 0.46 PVC 2.1
C05 ‐ CS 2 6 0.25 PVC 1.5
EX CB1 ‐ EX CB2 8 0.13 PVC 1.4
C03 ‐ END 6 6 0.32 PVC 1.8
FES04 ‐ CS02 12 0.00 RCP 0 (outlet control stub pipe)
CS01 ‐ FES03 12 0.00 RCP 0 (outlet control stub pipe)
END 5 ‐ CB03 6 0.00 PVC 0 (outlet control stub pipe)
4. Comment 34: “There should be no less than 2.5 feet of cover along any part of the pipe from final
pavement elevation or final ground surface elevation to the top of the pipe.”
As discussed at the meeting held with City review staff on September 9, topographical constraints limit pipe
cover depths, and CCPR is therefore requesting a variance for the following pipes to have less than 2.5 feet
of cover:
PIPE COVER (FT)
CB04 ‐ FES06 1.0
TD3 ‐ 1B 2.0
1B ‐ END 3 2.0
C05 ‐ CS 2 1.2
TD 4 ‐ END 4 2.0
44 East Mifflin Street, Suite 500, Madison, WI 53703 T 608.251.1177 F 608.251.6147
C03 ‐ END 6 1.0
CS02 ‐ FES05 0.7
CS01 ‐ FES03 1.9
END 5 ‐ CB03 1.0
5. Comment 35: “…. A minimum drop of 0.1 foot through manholes and inlet structures should be provided.”
As discussed at the meeting held with City review staff on September 9, CCPR is requesting a variance to
allow for less than a 0.1 foot drop in pipes through manholes and inlet structures and the use of shallow
(pipe bell) construction detail (Detail 3 Sheet CU501) to accommodate site topographical constraints.
Thank you for your consideration on these issues. Please call me with any questions or comments that may arise
during your review.
Sincerely,
David K. Wolmutt, P.E.
SmithGroup
Copy: Michael Klitzing, Director, Carmel Clay Parks and Recreation
Tony McClurg, CTI Construction, Clay Township Program Manager
West Park - The Core 11640.000
SECTION 329100 - SOIL PREPARATION 329100 - 1
SECTION 329100 - SOIL PREPARATION
PART 1 - GENERAL
1.1 SUMMARY
A. This section specifies all soil materials designated as "Topsoil" and “Engineered Bioswale Soil Mix” on the
Drawings or in the specifications. Supply topsoil for landscape work (seeding and planting) from both on-
site sources and off-site sources.
B. Related Requirements:
1. Section 311000 "Site Clearing" for on-site topsoil stripping and stockpiling.
2. Section 329210 "Lawns" for placement of topsoil for lawn installation.
3. Section 329220 "Native Seeding" for placement of topsoil for native seed installation.
4. Section 329300 "Exterior Planting" for soil mixtures that include topsoil and placement of soil for
plant installation.
1.2 REFERENCES
A. ASTM International, as referenced herein as ASTM.
B. US Department of Agriculture (USDA) Handbook No. 60 – Diagnosis and Improvement of Saline and Alkali
Soils.
1.3 ACTION SUBMITTALS
A. Source Quality Control:
1. Material Test Reports: Conduct Topsoil testing for existing on-site topsoil stockpiles and imported
topsoil from off-site sources.
2. Sample: Provide 1 quart samples for each topsoil test unit (including source).
3. Conduct all topsoil sampling and testing prior to delivery from off-site sources.
1.4 INFORMATIONAL SUBMITTALS
A. Field Quality Control:
1. Obtain samples, test materials and submit field test reports as described under Articles 2.1 and 3.1
below.
1.5 QUALITY ASSURANCE
A. Qualifications:
1. Soil-Testing Laboratory Qualifications: The Contractor shall engage an independent laboratory or
university laboratory, recognized by the State Department of Agriculture, with the experience and
capability to conduct the testing indicated and that specializes in types of tests to be performed.
PART 2 - PRODUCTS
2.1 MATERIALS
A. Topsoil:
1. Topsoil for landscape work shall be a fertile, friable, sandy loam or loam surface soil without
admixture of subsoil screened to be free of stones, stumps, root, trash, debris, and other materials
deleterious to plant growth.
2. Particle Size Distribution of Topsoil:
Sieve Designation Percent Passing
1 inch screen 100
1/4 inch screen 97 - 100
No. 10 U.S.S. mesh sieve 95 - 100
No. 140 U.S.S. 15 – 35
3. The pH range shall be 6.5 to 8.0. Topsoil that does not meet this pH range shall not be approved
by the Architect/Engineer.
4. Organic content shall not be less than 4 percent and not greater than 20%.
5. Clay content determined by Bouyoucous Hydrometer Test: between 5 percent and 15 percent.
6. Base percentages on dry weight of the sample.
West Park - The Core 11640.000
SECTION 329100 - SOIL PREPARATION 329100 - 2
B. Engineered Bioswale Soil Mix
1. Engineered Bioswale Soil Mix shall consist of a mix of 70% sand and 30% compost, as described
below.
2. Sand shall be washed, medium coarse, ASTM C33.
3. Compost may include:
a. Leaf compost, screened and free of trash and other debris.
b. Standard commercial grade compost of sheep or cow manure.
4. Compost shall meet the following requirements:
a. Particle size: 98% of the compost shall be capable of passing the ¾ inch sieve. All
material shall be capable of passing the 1 inch sieve, and shall be free of rocks, gravel,
wood, debris, physical or pollutant contaminants, and of noxious weeds and their seeds.
b. Organic matter: 40%-60% organic matter content.
c. pH: Range of 6 to 8.
d. Soluble salts: Electrical conductivity below 10 dS m-1.
e. Moisture content: Between 35%-50% by weight.
5. Combine all materials uniformly by volume to the above percentages. The final bioswale soil mix
shall meet the following tested attributes:
a. The pH range shall be 5.5 to 8.0.
b. Texture class shall be loamy sand, having no less than 70% sand and no greater than 10%
clay considering only the mineral fraction of the soil.
c. Soluable salts: 500 ppm maximum.
d. Decomposed organic mattter: 3-5% by weight (8-20% by volume).
2.2 SOURCE QUALITY CONTROL:
A. Laboratory Test Reports:
1. Conduct topsoil testing for each soil test unit as follows:
a. Existing off-site location(s): 1 sample per acre of site to be excavated.
b. Existing stockpile: 1 sample per 1,000 cubic yards of stockpiled soil.
c. Engineered Bioswale Soil Mix: 1 sample per 500 cubic yards of soil mix.
2. Submit all test reports for approval. Topsoil units that do not meet the soil requirements specified
under this section will not be permitted for use as Topsoil.
3. Fertility: For each unamended soil type, test topsoil for organic materials, pH, phosphate, potash
content, calcium, magnesium, zinc, iron, and manganese.
4. Physical Properties: Determine percent sand, silt and clay and textural classification (USDA) by
hydrometer method. Identify all foreign materials such as rock, roots, and vegetation.
5. Recommendations: Based on the test results, the independent testing laboratory shall state
recommendations for soil treatments and soil amendments to be incorporated prior to seeding and
planting. List recommendations in weight per 1000 square feet for lawn area and cubic yard of
plant mixture based on the types of plants for this project. Recommendations shall include;
nitrogen, phosphorus, and potash nutrients and all soil amendments required for the long-term
growth of the specified plants and turf.
PART 3 - EXECUTION
3.1 FIELD QUALITY CONTROL
A. Sampling: Each soil test unit shall be a composite of five to seven subsamples taken the full depth of
proposed source for each acre of surface area. For on-site stockpiles, discard upper 6 inches of soil
before sampling. For large stockpiles, partial excavation will be required for collection of representative
samples. Include site plan verifying the locations of all topsoil sampling. Topsoil test reports shall be
accompanied with each sample unit for review and approval by the Architect/Engineer.
B. Testing methods and written recommendations when not references elsewhere, shall comply with USDA's
Handbook No. 60. Nutrient data to be given in parts per million (ppm) dry soil.
C. Topsoil shall be as defined in ASTM D5268.
D. Soil pH shall be tested in accordance with ASTM D4972.
E. Test for organic material by using ASTM D2974.
West Park - The Core 11640.000
SECTION 329100 - SOIL PREPARATION 329100 - 3
3.2 PLACING ENGINEERED BIOSWALE SOIL MIX
A. Engineered Bioswale Soil Mix shall be backfilled into indicated areas to depths and elevations shown on
Drawings, using methods of placement that minimize compaction and prevent displacement of drainage
layers. Vibrating plate-style compactors shall not be utilized.
B. Engineered Bioswale Soil Mix must not be applied in any condition that would hamper a successful
installation, including application when subgrade is too wet as indicated by saturation or flooding.
C. Do not install bioswale soil mix until upstream lands have been fully stabilized.
D. Do not allow sediments from construction runoff to accumulate over installed bioswale soil mix. At no cost
to Owner, remove and replace bioswale soil mix as directed by Architect/Engineer, if Architect/Engineer
determines that construction sediments have accumulated over installed bioswale soil mix.
END OF SECTION