Up to3Resource is present, likely difficult to address
Evidence
Verified
Cited claims
11
Requirements
0
Requests
2
Rating
2Impacts likely but may be easily resolved
up to3Resource is present, likely difficult to address
The engine shows this rating as 2-3
The rule
Code computed the rating from the assessor's inputs:
impact_likely=yes -> 2
Set by the rule
Decision
Released with flags
The engine's reasons
Agencies not in the register or the evidence: Ohio EPA, USACE, Carroll County, Harrison Township Trustees
The core evidence supports presence, peripheral extent and category 2. Problems: an unsourced 15–25 percent grading band, Fescue Road haul-route content that belongs in EG-03, avoidable labelled 'yes' when the rationale describes mitigation, and an unsupported link between the NWP 14 quote and the S-4 access road.
Evidence state
Verified · field study or agency determination
Worst case
If what is pending at the cut-off went badly, the same rule gives a higher rating.
Scenario
Refusal, seen in 30 percent of test piles so far, proves widespread beyond the West Block ridges, requiring non-standard pre-drilling or rock excavation across much of the site.
Step still pending
Topographic survey and further pile load testing during final design
Inputs largely follow the evidence and the category looks right. Problems: an unsupported 25 percent slope threshold, 'perched' groundwater not in the quote, incomplete agencies (township, floodplain administrator, USACE), missing floodplain and road-use next steps, and a loosely grounded worst case.
Revised once after the first critique. Rating unchanged.
The five inputs
Present: yes
Geotechnical field study reports slopes up to 18 percent, refusal in 9 of 30 test piles, groundwater that may be near the surface in the floodplain, and moderate corrosivity to buried steel (C-b3cb8c76ac, C-e04f4cf7e1, C-05146fd25c, C-d1c044dc6c). Drainage memo reports slow-infiltration C/D soils and array rows in the flood fringe (C-55cbc4b507, C-546dd83365).
Maximum measured slope is 18 percent, within the 15 to 25 percent grading-cost band, not unbuildable ground (C-b3cb8c76ac); the 25 percent figure is the row guidance for unbuildable slopes, not from a cited document. Refusal affected 30 percent of test piles, mostly on West Block ridges, not shown to cover most of the site (C-e04f4cf7e1). About 14 acres of arrays are in the flood fringe, and the soft floodplain soils are outside the layout (C-546dd83365, C-39dffbad33). The 165 acres of undermined ground is a geologic hazard rated elsewhere (C-d106c90db2).
Conditions are addressable by standard engineering: pre-drilled or driven piles, corrosion allowance for moderate corrosivity, drainage design, and layout away from the soft floodplain (C-e04f4cf7e1, C-d1c044dc6c, C-39dffbad33). Only about 96 of the 780 fenced acres will be graded (C-4c4d92f167).
Grading of about 96 acres requires an SWP3 (C-4c4d92f167). The S-4 access road crossing fits NWP 14 without pre-construction notification (C-336bf30d1a). Array rows in Zone AE imply floodplain review (C-546dd83365). All routine approvals; no individual or prohibitive pathway.
A typical build likely needs grading on slopes up to 18 percent, pile refusal mitigation on West Block ridges, array rows in the flood fringe and temporary widening of Fescue Road (C-b3cb8c76ac, C-e04f4cf7e1, C-546dd83365, C-8172eb7213).
Slopes reach 18 percent in the East Block and Sallow Creek valley walls. 9 of 30 test piles met refusal before 8 feet, mostly on West Block ridges. Soils show moderate corrosivity; groundwater may be near the surface in the floodplain. About 14 acres of array rows lie in the flood fringe. Fescue Road needs temporary widening.
Critique
Verdict
weakened
Suggested direction for the rating
same
Summary
The core evidence supports presence, peripheral extent and category 2. Problems: an unsourced 15–25 percent grading band, Fescue Road haul-route content that belongs in EG-03, avoidable labelled 'yes' when the rationale describes mitigation, and an unsupported link between the NWP 14 quote and the S-4 access road.
Critic model
Luminol
Issues
Severity major · Kind unsupported_statement
The extent rationale cites a '15 to 25 percent grading-cost band' and a 25 percent 'row guidance' unbuildable threshold. Neither appears in any cited quote, the row definition, or the requirements considered. The 18 percent figure is supported, but the band is not. Remove it or source it.
Fescue Road temporary widening and township road-use terms are haul-route and public-road matters. The row definition assigns these to EG-03. Using them as an impact driver and next step double counts and pulls in Harrison Township Trustees as an agency.
Avoidable is 'yes', but the rationale lists mitigations (pre-drilling, corrosion allowance, drainage design), not avoidance. Slopes, refusal and flood-fringe rows remain on site. 'Partly' fits better, as the worst case implies. The label does not change the category.
'S-4 access road crossing' ties the NWP 14 quote to the access road. The quote only mentions an ephemeral channel of about 40 linear feet. It does not say which crossing or road. Confirm the link in the data room.
Agencies not in the register or the evidence: Ohio EPA, USACE, Carroll County, Harrison Township Trustees
Passed
cutoff_respected · blocking
Passed
critic_not_refuted · blocking
Failed
critic_weakened · not blocking
The core evidence supports presence, peripheral extent and category 2. Problems: an unsourced 15–25 percent grading band, Fescue Road haul-route content that belongs in EG-03, avoidable labelled 'yes' when the rationale describes mitigation, and an unsupported link between the NWP 14 quote and the S-4 access road.
Evidence (11)
Each claim the row cites: the statement in the assessor's words, then the quote the engine found on the page.
Arrow keys move the selection. A middle-click opens the claim's own page.
Free water was met at 6 to 14 feet in 9 borings, mostly perched near Sallow Creek; seasonal high groundwater may be near the surface in the floodplain.
Quote check Exact · Placed verbatim · The quote occurs on the page exactly as written. · Read as native
Graywacke Geotechnical, LLC
Geotechnical engineering and subsurface exploration | Canton, Ohio
Preliminary Geotechnical Engineering Report
Tamsin Ridge Solar and Storage Project, Harrison Township, Carroll County, Ohio
Prepared for Northfold Energy Partners, LLC. Project G23-0219. May 15, 2023.
Summary of findings
Graywacke drilled 24 borings (B-1 to B-24) across the approximately 1,140-acre Project Area, four of them
(B-17 to B-20) to 100 feet in the East Block to investigate mining, and drove and load-tested 30 test piles (TP-1
to TP-30) from March 27 to April 14, 2023.
1. Abandoned underground mine. ODNR Division of Mineral Resources Management abandoned underground
mine maps show the Elsby No. 2 Mine, worked in the Upper Freeport (No. 7) coal from about 1915 to 1938 by
room-and-pillar methods, beneath approximately 165 acres of the East Block (Parcels 9, 10 and 12). Cover over
the coal ranges from 45 to 95 feet. Borings B-17 and B-19 dropped through voids and collapsed rubble at 61
and 74 feet. Two closed depressions, 12 and 20 feet across, on Parcel 10 are mine subsidence features
(sinkholes). Pillar failure can continue for decades; sinkhole-type subsidence is most likely where cover is under
about 100 feet, which is the case over the whole undermined area. This is the main geotechnical constraint on
the Project.
2. Oil and gas wells. Two plugged and abandoned oil and gas wells (Parcels 4 and 10) and an active horizontal
Utica well pad adjoining Parcel 5 were located. Keep structures at least 100 feet from plugged wells, and follow
the operator's setbacks from the pad and its flowlines.
3. Shallow bedrock and pile refusal. Weathered shale and sandstone were met at 4 to 11 feet. Nine of the 30
test piles (30 percent) met refusal before reaching 8 feet of embedment, mostly on the West Block ridges.
Pre-drilling should be assumed for about 30 percent of pile locations.
4. Groundwater. Free water was met at 6 to 14 feet in 9 borings, mostly perched on shale near Sallow Creek.
Quote starts. Seasonal high groundwater may be near the surface in the floodplain. Quote ends.
5. Corrosivity. Field resistivity of 1,800 to 3,500 ohm-cm and soil pH of 5.1 to 5.8 indicate moderate corrosivity to
buried steel; sulfate exposure is negligible.
6. Slopes. Ground slopes are 0 to 8 percent in the West Block and up to 18 percent in the East Block and on the
Sallow Creek valley walls, where colluvium overlies shale. Slope stability is adequate for arrays if cuts on the
valley walls are avoided; one small landslide scar was seen on Parcel 12.
7. Design parameters. Frost depth 36 inches. Seismic site class C; seismic hazard is low. Design loads follow
ASCE 7-16: basic wind speed 115 mph (Risk Category II), ground snow load 20 psf, and 0.5-inch radial ice for
the gen-tie structures.
Graywacke Geotechnical, LLC - Project G23-0219 Page 1 of 3
The outline marks where the quote begins on the page.
C-05146fd25c
Free water was met at 6 to 14 feet in 9 borings, mostly perched near Sallow Creek; seasonal high groundwater may be near the surface in the floodplain.
Quoted from page 1
Seasonal high groundwater may be near the surface in the floodplain.
Fescue Road is a narrow 16-foot township road with two 90-degree turns needing temporary widening for tractor-trailers.
Quoted from page 1
Fescue Road is a 16-foot chip-and-seal township road with narrow shoulders
and two 90-degree turns where swept path analysis shows that tractor-trailers need temporary widening.
Comments
Slopes reach 18 percent in the East Block and Sallow Creek valley walls. 9 of 30 test piles met refusal before 8 feet, mostly on West Block ridges. Soils show moderate corrosivity; groundwater may be near the surface in the floodplain. About 14 acres of array rows lie in the flood fringe. Fescue Road needs temporary widening.