Septic Engineer in Otisco, NY
Otisco Lake supplies the Onondaga County Water Authority. Every septic plan in the watershed gets an extra review. Testing, PE stamped designs and the full submittal.
Fees. Process. Answers.
Septic design for Otisco, NY, from soil test to county approval.
10 NYCRR Section 131.50 bars any seepage unit within 50 feet of Otisco Lake or a watercourse, requires plans to be approved before a system is built or altered, requires a full inspection and site evaluation before a failed system is repaired, and sets a maximum 3 year inspection interval for year round homes.
Yes. Under the county design guidelines, plans in the Otisco Lake watershed need the county application signed by the owner and a copy to the Onondaga County Water Authority, which sends its recommendation to the Health Department before approval.
Otisco Lake is on the Onondaga County septic replacement program list. Properties within 250 feet with a substandard or failing system may qualify. The county decides eligibility.
Otisco is not in the county Consolidated Sanitary District, and we know of no public sewer serving the town.
Designs are prepared and stamped by a New York licensed Professional Engineer (PE). Backwell coordinates testing, both reviews and the install.
Use the form. Estimate in 1 hour.
Septic engineer in Otisco, NY: what it is and who needs one
The Town of Otisco borders Otisco Lake, a public water supply for the Onondaga County Water Authority. Septic design here follows Appendix 75-A plus the Otisco Lake watershed rules, with a copy of the plan going to the Water Authority before the Onondaga County Health Department approves it. A septic engineer handles the tests, the design and both reviews.
Backwell coordinates testing, design, the submittals and the install. Designs are prepared and stamped by a New York licensed Professional Engineer (PE).
Sewer in Otisco
Otisco is not in the county Consolidated Sanitary District, and we know of no public sewer serving the town. Its hamlets run from Amber in the northwest corner by the lake to Otisco, Otisco Valley, Maple Grove and Gamble Mill, plus the lakeshore hamlets of Bay Shores, Rice Grove and Williams Grove.
The town's Required Approvals guide puts it plainly: if a project involves a septic or other sewage disposal system, the developer has to meet Onondaga County Health Department requirements, and any wastewater discharge to surface or ground water, or work near protected wetlands, means consulting DEC first. Subdivisions need county planning agency review and county Health Department approval.
Soils in Otisco and the system they point to
Otisco is upland till with a valley through it. Lansing till covers more than a quarter of the land, with Honeoye, Aurora soils over shale, and Conesus. Palmyra and Howard gravel sit in the valley bottoms.
| Soil series | Share of land | What it is (USDA) | What it usually means for the design |
|---|---|---|---|
| Lansing | 27% | very deep, well drained till | Usually deep enough for conventional trenches where slope allows. |
| Honeoye | 18% | very deep, well drained loamy glacial till | Often deep enough for a conventional trench field. The perc rate and the 6 foot test pit still decide it. |
| Aurora | 16% | moderately deep, moderately well drained till with bedrock at 20 to 40 inches | Rock and seasonal water both inside 4 feet. Shallow trench or raised bed. |
| Conesus | 14% | very deep, moderately well drained till | Seasonal wetness in the subsoil sets how deep trenches can go. |
| Palmyra | 4% | very deep, well drained gravelly outwash over stratified sand and gravel | Drains well, sometimes too well. Soil faster than 1 minute per inch is not suitable as is under 75-A. |
| Howard | 3% | very deep, well drained gravelly outwash on valley terraces | Fast soil. Good depth, but the design has to slow the effluent down where perc is very rapid. |
USDA septic absorption field ratings, the Town of Otisco boundary, including part of Otisco Lake: very limited 71 percent, somewhat limited 29 percent of rated land. Leading limits: shallow seasonal water, slope, fast seepage in the bottom layer.
About 71 percent of rated land is very limited for a conventional field, half of it for shallow seasonal water and nearly a quarter for slope. Conesus and Aurora soils carry seasonal wetness, and Aurora puts shale at 20 to 40 inches. Lansing and Honeoye with good depth on gentle ground can take conventional trenches. The valley gravels are the other risk: the watershed rule says a site with rapid percolation such as rock fissures can be rejected, so very fast soil gets designed with care.
Otisco Lake watershed rules
Otisco Lake supplies the Onondaga County Water Authority, and its watershed rules sit in 10 NYCRR Section 131.50. For septic they say:
- No part of a seepage unit (tile field, seepage pit or equivalent) can be built or rebuilt within 50 feet of the lake or a watercourse, and a watercourse includes every spring, stream, marsh or channel flowing toward the lake.
- Plans have to be approved before any new system is built or an existing one altered, and a site with rock fissures or other rapid percolation can be rejected.
- When an existing system fails, the whole system is inspected and the site evaluated before alterations are designed.
- Systems serving year round homes are inspected at least every 3 years, and new or replacement tanks should have a fresh air inlet visible above ground.
- Properly designed holding tanks with overflow safeguards are acceptable under a local health department permit where feasible.
The county guidelines add that an Otisco watershed plan needs the county application signed by the owner and at least 5 plan copies, with a copy going to the Water Authority for its recommendation before the county approves.
The town adds a few of its own items. Otisco has a Flood Damage Prevention local law, and the code officer can tell you if a property is in a regulated flood area. The minimum building setback from a town road is 40 feet from the centerline, which matters when the house, tank and field all have to fit between the road and the lake.
How a septic design in Otisco works
- Send the address. Use the form. Estimate in 1 hour.
- Confirm sewer or septic. If a public sewer can serve the lot, you do not need a septic design.
- Perc holes and a deep test pit. At least two staked perc holes in the design area (30 inches deep for a conventional system) and a test pit logged to 6 feet for mottling, water and rock.
- Stamped design. A scaled plan with the tax map number, nearby wells, elevations and system details. Designs are prepared and stamped by a New York licensed Professional Engineer (PE).
- County submittal. Plan and fee go to the Bureau of Public Health Engineering, 421 Montgomery Street, Syracuse: 3 plan copies outside the lake watersheds; in the Otisco watershed it is 5 copies plus the owner signed watershed application, with a copy to the Water Authority for review. Once approved, a copy goes to the town.
- Town building permit. Otisco Code Enforcement, 1924 Barker Street, (315) 378-6737. Building permit applications come from the Town Clerk's office or the town website.
- Install and inspection. County inspection on 24 hours notice. Inside plumbing is done by a plumber licensed through Onondaga County Plumbing Control, and fill systems get the engineer's fill certification first.
What it costs
The county fee schedule sets the health department side for a lot under 1,000 gallons per day: $310 full application, $186 redesigned project, $62 amended project or revised plan review, $93 site investigation, $62 repair inspection. The fee is paid with the plans and covers the county's review and construction inspection. Testing, design and install are priced in writing.
What the health department checks
The county reviews the plan against New York's Appendix 75-A and its own design guidelines. In Otisco the checks that decide most designs are the setback from the lake and every stream or marsh feeding it, slope, and the 100 foot well separation on lakeshore lots.
- Flow and tank. 110 gallons per day per bedroom for new construction. Tank size follows the bedroom count.
- Usable soil. Conventional: 4 feet over rock, clay or high water, with water 2 feet below the trench bottom. Shallow trench: 2 to 4 feet. Raised bed: 1 to 2 feet, water 1 foot down. Mound: water 1 foot down, rock 2 feet down, native perc faster than 120 minutes per inch, slope under 12 percent.
- Separations. Field, raised bed or mound: 100 feet to wells (200 if upgrade in the drainage path), 100 feet to water and wetlands, 20 to the house, 10 to the lot line, measured from the toe of any fill. Tank: 50 feet to wells and water.
- Site limits. No field over 15 percent slope or below the 10 year flood level, system above the 100 year flood level, no soil faster than 1 minute per inch unless modified, and 50 percent expansion area where possible.
Common Otisco problems and how the design handles them
Lakeshore cottage on a small lot
The problem: No seepage unit within 50 feet of the lake or a watercourse, plus 100 feet to wells and the 75-A water setbacks.
How the design handles it: The PE maps the lake line, the streams and every well, then looks at shallow pressure dosed trenches, enhanced treatment or, where nothing else fits, a holding tank with overflow safeguards under a county permit.
Failed system near the lake
The problem: The Otisco rules say the whole system has to be inspected and the site evaluated before the repair is designed.
How the design handles it: We inspect and test first. Otisco Lake is on the county septic replacement grant list for properties within 250 feet.
Steep upland lot
The problem: Nearly a quarter of the town's very limited land is limited by slope.
How the design handles it: Test locations on the flattest ground, trenches along the contour, and a diversion ditch uphill of any fill.
Timeline
Allow time for the Water Authority's recommendation, which comes before the county approval. Spring testing gives the best read on Otisco's seasonal water. Raised beds add fill settling and the engineer's certification.
Sources
Soil shares and ratings come from the USDA NRCS soil survey (SSURGO) for Onondaga County, summarized for the Town of Otisco boundary, including part of Otisco Lake. Regulations and fees as published by the agencies below; they can change.
- Onondaga County Health Department, Septic Systems (Bureau of Public Health Engineering)
- Onondaga County Environmental Health fee schedule
- Onondaga County Design Guidelines for Individual Sewage Systems
- Onondaga County Health Department Fill Certification Form
- NYS DOH 10 NYCRR Appendix 75-A, Wastewater Treatment Standards, Residential Onsite Systems
- NYS DOH fact sheet: Need for Licensed Design Professionals, Residential OWTS
- Onondaga County WEP, Consolidated Sanitary District service area
- Onondaga County WEP Plumbing Control
- 10 NYCRR Section 131.50, Onondaga County Water Authority (Otisco Lake) watershed rules
- OCHD Application for Permit to Construct a Waste Disposal System (Skaneateles and Otisco watersheds)
- Onondaga County Septic System Replacement Funding Program
- USDA NRCS Web Soil Survey, Onondaga County (NY067)
- USDA NRCS Soil Data Access (SSURGO), septic tank absorption field ratings
- Town of Otisco Required Approvals guide
- Town of Otisco directory
- Otisco, New York
- USDA Official Series Description: Lansing
- USDA Official Series Description: Honeoye
- USDA Official Series Description: Aurora
- USDA Official Series Description: Conesus
- USDA Official Series Description: Palmyra
- USDA Official Series Description: Howard
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