Do I need gutters on a high tunnel?

NRCS Conservation Practice Standard 325 says high tunnels shed a large amount of water and can create drainage and ponding; direct runoff away from the structure, and provide a detention basin, storage reservoir, or stable outlet when cover runoff can erode the ground. Iowa PM 3017: without elevation or perimeter drainage tile, water puddles along the sides, erodes soil, and saturates the inside edge. Gutters are one option. CPS 558 also names ground gutters — rock-lined channels, rock-filled trenches with subsurface drains, or concrete channels — when roof gutters are not feasible. Indiana’s January 2024 implementation sheet (Indiana, not national) names gutters, rock trenches, underground outlets, or diversions when needed. The national High Tunnel System Initiative FAQ is silent on gutters.

Does EQIP pay for high-tunnel gutters, rain barrels, or cisterns?

Tunnel Spec does not invent eligibility or dollars. The High Tunnel System Initiative FAQ says financial assistance is provided only for the structure itself; the grower is responsible for electricity, venting, lighting, and similar additions. That FAQ does not name gutters, cisterns, Practice 558, or Practice 620. CPS 325 tells planners to plan supportive practices for erosion, irrigation, and runoff, and to use 558 and 620 criteria when designing runoff structures — that is a design consideration, not a printed gutter payment. The EQIP High Tunnel Initiative supporting-practices list names Underground Outlet (among others) and does not name Roof Runoff Structure 558 or Irrigation Reservoir. Indiana’s 325 implementation sheet lists Roof Runoff Structure 558 and Irrigation Reservoir 436 among planned associated practices, and names gutters as a water-management option — that sheet is Indiana. UMD says NRCS may have funding for rainwater harvesting and that EQIP assists high-tunnel installation; it does not print a gutter dollar. Confirm with your county NRCS office. See what EQIP will not pay for.

How much rain runs off a 30×96 high tunnel?

Use the conversion 1 inch of rain on 1 square foot ≈ 0.623 gallons (144 cubic inches per square-foot-inch ÷ 231 cubic inches per gallon). Footprint 30 × 96 = 2,880 sq ft. 2,880 × 0.623 = 1,794.24 gallons per inch of rain on the full footprint. University of Maryland Extension writes the same arithmetic as inches × sq ft × 144 / 231. Iowa PM 3017 prints about 900 gallons from a 30′ × 96′ roof in a half-inch rain. UMD notes arched-side houses lose footprint because gutters sit on hip boards — measure width between gutters, not wall-to-wall, on a Quonset. This page does not invent a local rainfall total.

Can I irrigate food crops with rain collected off the plastic?

Iowa PM 3017: use collected runoff only through drip; do not drink it or overhead-irrigate food crops because of potentially high bacteria. Rutgers FS1218: apply harvested rainwater to the soil, possibly through drip, not onto the plant; water in the morning and do not harvest right after watering. UMD cites that Rutgers treatment (bleach solution) plus drip and delayed harvest; it also names peracetic acid / SaniDate 12.0 as an EPA-registered pre-harvest agricultural-water treatment. CPS 558: the operator is responsible for quality for the intended purpose. CPS 325: captured runoff should not be the only irrigation source. Filter and pump into drip — hardware notes stay on high-tunnel drip irrigation. This is not food-safety legal advice.

Where do gutters go on gothic vs Quonset hoops?

UMD: brackets attach to the hip board; arched sides lose collection footprint versus a straight-wall house because gutters sit on those hip boards. Iowa: gothic buildings can take a support board just below the ribbon (hip) board; Quonset curved sides need a 2×4 split diagonally so the gutter brackets sit on a more vertical face; slope 6–8 inches per 100 feet toward the tank. Iowa prefers vinyl slip-joint gutters for seasonal removal; metal is more likely to tear film. Indiana (labeled Indiana): if gutters are installed, remove them before snow, ice, or high wind. Geometry notes stay on gothic vs Quonset; snow-prep stays on high-tunnel snow removal.

Is it legal to catch rain off a high tunnel?

CPS 325 says runoff may be captured for irrigation if allowed by State law, and should not be the only irrigation water. NCSL (8 September 2025): some states control who may use rain; Colorado is the example, with 2009 limited collection, and 18 other states set limits; most states and territories give free rein. Check your state. The High Tunnel System Initiative FAQ still requires a viable irrigation source and proof of legal access to water before a high tunnel is designed. Not legal advice.

Gutter · runoff · rain barrel · not a kit

High-tunnel gutters and rainwater collection: runoff, first flush, and drip (sourced)

Growers search high tunnel gutter, high tunnel rainwater collection, hoop house runoff, high tunnel water management, and collect rain from greenhouse roof when the plastic turns every storm into a drip line along the sides. This page is the runoff sibling — why that concentrated sheet erodes pathways and soaks soil under roll-up sides, what NRCS Conservation Practice Standard 325 and the High Tunnel System Initiative FAQ actually print about runoff, and how Iowa and Maryland hang vinyl or aluminum on a hip board into barrels or IBC totes. Using stored water in drip stays on high-tunnel drip irrigation. Gothic vs Quonset hip-board geometry stays on gothic vs Quonset. Snow and “take the gutters off” stays on high-tunnel snow removal. Pathway fabric stays on high-tunnel ground cover / weed barrier. It is not a commercially manufactured high-tunnel kit and not a USDA payment schedule.

Quotes copied 20 October 2026, about 03:30 UTC from live CPS 325, the High Tunnel System Initiative FAQ, CPS 558, the EQIP High Tunnel Initiative overview, Indiana NRCS 325 implementation requirements (labeled Indiana), University of Maryland Extension FS-2025-0765, Iowa State PM 3017 via the ISU Extension store, Rutgers FS1218, and NCSL. Featured Amazon prices copied the same night. A missing featured price stays an em dash. Ratings are not copied. Seller GPH, capture-percent, and “greenhouse” lines stay labeled seller claims. Vendor kit pages stay manufacturer URLs — no Amazon tag there. This page does not invent a USDA dollar, an EQIP gutter payment, or a local rainfall total.

Kit index: commercially manufactured kits. Replacement-parts directory: high-tunnel replacement parts. Size map: high-tunnel sizes. Drip: high-tunnel drip irrigation. Roll-up sides: sidewall vents. Ground posts: high-tunnel ground posts. County inspection: EQIP checklist. What the program will not pay for: EQIP will not pay for. Affiliate method: about / disclosure.

Figure: schematic gothic vs Quonset hoops with hip-board gutters, a concentrated drip line along the sides, a downspout into a tote, first-flush and overflow. Not a product photo.

Why the drip line along the sides matters

A tunnel roof is a giant funnel. Rain that would have soaked the whole footprint instead falls as a sheet at the eaves. Iowa’s 2012 catchment guide is blunt about puddles, erosion, and wet soil on the inside edge — the same strip where roll-up curtains sit.

Unless the high tunnel site is elevated from the surrounding area and/or has drainage tiles installed around the perimeter, water accumulates and creates puddles around the sides of the high tunnel. This can create erosion problems as well as saturated soil on the inside edge of the high tunnel.
Source: Iowa State University Extension and Outreach — Rainwater Catchment from a High Tunnel for Irrigation Use (PM 3017, January 2012). Store listing live tonight. SARE summary: SARE — Rainwater Catchment from a High Tunnel for Irrigation Use (points to ISU PM 3017). Wet soil under curtains: roll-up sides. Soggy pathways: ground cover / weed barrier.

High tunnels shed a large amount of water and can create drainage and ponding issues where none previously existed. Direct runoff away from the high tunnel structure to avoid ponding. Provide a detention basin, storage reservoir, or stable outlet when runoff from tunnel covers empties onto the ground surface with potential to cause erosion.
Source: NRCS Conservation Practice Standard 325 High Tunnel System. Same standard: Plan supportive conservation practices to address all environmental concerns associated with the installation and use of the high tunnel systems such as erosion, irrigation, and runoff.

What NRCS actually prints about runoff

Practice 325 is not silent. The national FAQ is. Do not collapse those two documents into a gutter payment.

Runoff may be captured and used for irrigation purposes, if allowed by State law, though runoff should not be relied on as the only source of irrigation water. Use the criteria for CPS Code 558, Roof Runoff Structure, to design any structure needed to meet the runoff criteria above. Runoff may empty into surface or underground outlets, or onto the ground surface when properly protected. Size surface and underground outlets according to the criteria for CPS Code 620, Underground Outlet, to ensure adequate capacity.
Source: NRCS Conservation Practice Standard 325 High Tunnel System. Considerations, not a printed dollar. Additional-practices list on the same standard includes roof runoff structure, diversion, and underground outlets: Consider additional conservation practices where appropriate to include: crop rotation; irrigation water management; salinity management; nutrient management; integrated pest management; critical area planting; mulching; roof runoff structure; diversion; underground outlets; heavy use protection; cover crop. Plans must name supporting practices for erosion control and runoff: Site preparations and the required supporting practices for erosion control, runoff, and vegetative cover according to the requirements of the corresponding conservation practice standard.

A structure or system of structures to collect, control, and convey precipitation runoff from a roof. Purposes include capture roof runoff for onfarm use. Conditions include irrigation among on-farm uses: Collected and captured for other uses such as evaporative cooling systems, livestock water, or irrigation.
Source: NRCS Conservation Practice Standard 558 Roof Runoff Structure (NHCP, July 2021). Ground gutters when roof gutters are not feasible: Ground gutters can be rock-lined channels, rock-filled trenches with subsurface drains, or concrete channels. Overflow to a stable outlet: Design tanks connected directly to gutters and downspouts to bypass runoff events that exceed the design capacity of the tank. Include provisions to convey overflows to a stable outlet without excessive erosion. Operator quality: The operator is responsible for ensuring that the quality of the runoff is suitable for the intended purpose. First-flush language on that standard is written for livestock drinking water, not produce: If roof runoff will be used for livestock drinking water, the runoff should be treated before being consumed by livestock. This might include bypassing the first flush of runoff which often contains the majority of pollutants.

Under the High Tunnel System Initiative, financial assistance is provided only for the structure itself. Electricity, venting systems, lighting, etc. can be installed providing the additions meets manufacturer’s designs and specifications. However, the grower is responsible for those costs.
Source: USDA NRCS High Tunnel System Initiative FAQ (Updated November 2024; Oregon-branded). That PDF is silent on gutters, cisterns, rain barrels, Practice 558, and Practice 620. It does require a viable irrigation source: High tunnels must be placed near a viable source for irrigation. NRCS requires proof that legal access to water exists, regardless of how irrigation is obtained, before a high tunnel system can be designed for implementation. Oregon NRCS has a worksheet that is required to be signed by a verified authority confirming legal access to water. Some farms may be exempt. Purpose sentence on the same FAQ (“reduce runoff and leaching of nitrogen”) describes the high-tunnel practice, not a gutter payment.

Supporting practices may be needed to ensure that resource concerns associated with implementing and managing high tunnel systems are addressed. These conservation practices may include: Critical Area Planting; Diversion Grassed Waterway; Mulching; Irrigation System, Micro-irrigation; Subsurface Drain; Surface Drainage, Field Ditch; Underground Outlet.
Source: USDA NRCS EQIP High Tunnel Initiative overview. That overview names Underground Outlet. It does not name Roof Runoff Structure 558 or Irrigation Reservoir 436. “Paid the rate of compensation” is not a dollar.

When needed, direct runoff away from the HTS by installing water management structures such as gutters, rock trenches, underground outlets or diversions. Concentrated flow from the HTS may be captured and used for irrigation although this should not be the only source of irrigation water. If gutters are installed, remove them prior to snow, ice or high wind events to prevent potential damage to the structure.
Source: Indiana NRCS — High Tunnel System Implementation Requirements, Practice 325 (January 2024). Indiana sheet, January 2024 — not a national payment schedule. Planned associated practices on that sheet include Irrigation Reservoir 436 and Roof Runoff Structure 558. Lifespan on that Indiana sheet is five years; Pennsylvania’s seasonal page uses four. Do not mix them. Snow-off: high-tunnel snow removal.

UMD lists NRCS as a possible funding source for rainwater harvesting and EQIP as assistance for installing high tunnels. Those sentences do not print a gutter payment. Confirm associated practices with your district conservationist. Rules vary; call your county NRCS office.

Options: drain it, or catch it

No gutter — gravel or French drain

CPS 325 allows runoff onto a protected ground surface or into surface or underground outlets sized to Practice 620. CPS 558’s ground-gutter list is rock-lined channels, rock-filled trenches with subsurface drains, or concrete channels. Iowa: elevate the site and/or install drainage tile around the perimeter so water does not puddle. That is water management without a hip-board trough. Posts and wind copy stay on ground posts.

Kit gutters — what vendor pages show tonight

Manufacturer links stay on manufacturer pages. No Amazon tag on those URLs.

Bootstrap Farmer — Greenhouse Parts / High Tunnel Accessories (vendor collection): film, wiggle wire, clamps, repair tape, inflation, drip kit, roll-up, ground posts. No gutter SKU on that collection tonight.
FarmTek — Gutter Components & Accessories (Arch-Type and A-Frame greenhouses): Customize the ideal gutters for Arch-Type and A-Frame Greenhouses with our gutter components and accessories. Live product: FarmTek — Gutter Saddle for Arch-Type Greenhouses (vendor product page). Copy: Manufactured from durable 14-gauge galvanized steel. Gutter Saddles ensure secure installation of gutters to roofs. Two gutter types available: with or without downspout. Configure-to-order; the page showed no list price (em dash). These are Arch-Type / A-Frame greenhouse saddles, not a hoop-house hip-board kit.
Rimol Greenhouse Systems — High Tunnels (vendor category): High Tunnel SKUs, polycarbonate baseboard, wind bracing. No rain-harvest gutter kit on that category tonight. Rimol’s Rimol Greenhouse Systems — FAQs (vendor) “gutter-connect” sentence is a multi-bay greenhouse (Matterhorn), not a rain barrel: A gutter-connected greenhouse is a style of commercial greenhouse that allows for the connection of multiple greenhouse structures on the sidewalls, at the gutter. … The Matterhorn is Rimol’s flagship gutter-connect greenhouse.

Gothic vs Quonset

A high tunnel with arched sides, instead of straight, will lose some footprint for capturing rainwater due to the placement of the gutters along the hip boards. The footprint for collection should be calculated as the width between the gutters multiplied by the length of the high tunnel.
Source: Woerner, Little, Murphy, Francis, and Rosenberg Goldstein, University of Maryland Extension — Rainwater Harvesting on Urban Farms: Adding Gutters to Collect Rainwater from a High Tunnel (FS-2025-0765, updated 22 April 2026). Hip-board mount: Gutter brackets can be directly attached to the hip board supporting the sides of the high tunnel. Iowa gothic vs Quonset boards: This diagonal split of the support board is not necessary for gothic style buildings that allow the support boards to be installed just below the ribbon board. Due to the curved sides on a Quonset style high tunnel, split the 2 x 4 diagonally and attach the cut side to the tunnel. This will provide a more vertical surface for attachment of the gutter brackets. Shape comparison: gothic vs Quonset.

DIY gutter on hip board / baseboard

Iowa: hang vinyl gutter on a sloped support board (6–8 inches of drop per 100 feet); three brackets per 10-foot section; slip joints; high-flow drop outlets; a plastic flap from the film into the trough because hoop houses rarely have an eave. Vinyl is recommended for seasonal removal and because metal is more likely to tear film. Retrofit is allowed; new construction is easier because leftover roof plastic can feed the gutter. Indiana: take gutters off before snow, ice, or high wind. Iowa: winter removal in freezing climates. Vinyl gutters are recommended because they are assembled with slip joints and clip brackets that allow for easier installation and seasonal removal from the high tunnel. They are also less likely to tear the plastic than metal gutters.

Downspouts, barrels, totes, first flush, overflow, mosquitoes

Iowa sizes two weatherproof tanks at least 500 gallons each for a 30×96. UMD’s Baltimore case study used aluminum gutters, a first-flush diverter, and covered 330-gallon IBC totes with a submersible pump. First flush dumps the dirtiest first volume; UMD says that water can go to non-food crops. Overflow needs a stable outlet — CPS 558 and Iowa both say so. Screen or cover the tank: UMD covers clear totes against algae; Iowa warns that draining tanks after each irrigation cuts algae. Mosquito mesh ASINs fetched tonight had no featured price — that cell stays an em dash.

A first flush diverter system collects the first volume of water to run off from the high tunnel. The first volume of water collected from a roof or other surface typically contains the most contaminants.
Source: Woerner, Little, Murphy, Francis, and Rosenberg Goldstein, University of Maryland Extension — Rainwater Harvesting on Urban Farms: Adding Gutters to Collect Rainwater from a High Tunnel (FS-2025-0765, updated 22 April 2026). Rutgers on first flush: The first flush water is the initial rainwater that drains off an impervious surface, such as a driveway, parking lot, or roof and has been shown to have the highest levels of contaminants.

Into drip — pump and filter

Iowa’s irrigation list includes a pump, a 200-mesh filter, and an 8-to-12 PSI regulator. UMD pumps from the tote into the house irrigation. Hardware comparison for tubing, emitters, and regulators stays on high-tunnel drip irrigation— this page does not re-price that catalog.

Runoff math on a 30×96 (formula, not a rainfall forecast)

Conversion: 1 inch of rain on 1 square foot ≈ 0.623 gallons, because 1 ft² × 1 in = 144 cubic inches and a gallon is 231 cubic inches (144 ÷ 231 ≈ 0.623). University of Maryland Extension writes the same job as inches × square feet × 144 / 231.

Example footprint: 30 ft × 96 ft = 2,880 sq ft. One inch of rain on that full footprint: 2,880 × 0.623 = 1,794.24 gallons. UMD’s 144/231 form on the same 1 inch × 2,880 sq ft is 2,880 × 144 / 231 ≈ 1,795 gallons. Iowa PM 3017 prints a half-inch event, not a national climate number: Approximately 900 gallons of water will flow from the roof of a 30' by 96' high tunnel with a half-inch rain event. Iowa also: Each 1,000 square feet of high tunnel roof will yield approximately 300 gallons of water from a half-inch rain. Do not treat Baltimore’s summer 2024 case-study inches on UMD’s 30×72 as your rainfall. On an arched Quonset, use width between gutters — not wall-to-wall.

Food-safety and water-rights caveats

Water collected from runoff from the high tunnel should be used only for irrigation through a drip irrigation system. Due to potentially high bacteria levels, it should never be used for consumption or for overhead irrigation of food crops.
Source: Iowa State University Extension and Outreach — Rainwater Catchment from a High Tunnel for Irrigation Use (PM 3017, January 2012). Not the only water source: However, the water supply is not consistent and should not be the only water source for high tunnel crops.

When using harvested water to irrigate a vegetable garden, care should be taken to avoid getting water on the plant itself. Harvested rainwater should only be applied to the soil, possibly through drip irrigation. Water should be applied in the morning only. Produce harvesting should not take place right after watering in order to benefit from leaf drying and ultraviolet light disinfection.
Source: Bakacs, Haberland, and Yergeau, Rutgers NJAES — Rain Barrels Part IV: Testing and Applying Harvested Water to Irrigate a Vegetable Garden (FS1218, December 2013). Study E. coli: E. coli violated the irrigation standards in 9% of the samples collected. E. coli violated state drinking water standards in 66% of the samples collected. UMD cites that Rutgers bleach treatment and names peracetic acid (SaniDate 12.0) as an EPA-registered pre-harvest agricultural-water option. Household bleach on FS1218 is not FDA-labeled for water treatment — the fact sheet says so. Not food-safety legal advice. Drip layout: high-tunnel drip irrigation.

No one can control how much rain falls, but some states control who gets to use it. In Colorado, for example, complex water rights laws in place for more than a century assigned all the rainwater runoff to farmers and other entities. Homeowners couldn’t just harvest barrels of it lest they deprive claimants downstream of their rightful share. The state changed the rules in 2009 to allow limited individual collection of rainwater, and 18 other states have set limits on who gets access and how it can be used. However, most states and territories give residents free rein over collecting rain.
Source: National Conference of State Legislatures — Map Monday: Is Catching Rainwater Legal in Your State? (updated 8 September 2025). Source line on that page: U.S. Department of Energy Rainwater Harvesting Tool. CPS 325 already conditions capture on State law. Check your state. Not legal advice. This page does not reprint a 50-state table.

Sourced Amazon gutter and catchment parts

Titles and featured one-time prices were copied from live amazon.com product pages 20 October 2026, about 03:30 UTC. Kit frames stay on manufacturer product pages. Drip tubing and emitters are not re-priced here. Skipped tonight: B000BOKO9W Genova 5×10 vinyl gutter (unavailable / no featured); B01M0YC1CZ Genova 3×4×10 downspout (unavailable / no featured); B005WK0XL4 / B00L1PIVD6 Amerimax 10-ft vinyl gutter and downspout (HTTP 403); B0044UOEZE / B00CP701LO aluminum gutter and downspout (HTTP 404); B08Z8NCJCH EarthMinded DIY kit (HTTP 404); B00NO29TGW EarthMinded FlexiFit (no featured); B079Z71XQQ EMSCO (resolved to B01MR2PFOG, unavailable); B0BXHYK3YL Rain Harvesting First Flush Carrot (unavailable); B004VMFYIG Clean Rain Advanced (unavailable); B001OWG6BU First Flush 3-inch (no featured); B08R38FPXG Outsunny 60-gal collapsible (HTTP 404); B07T29BJZQ VINGLI collapsible (unavailable); B0C3TV2K2T / B0DP9V9SWS IBC tote adapters (no featured or unavailable); B08D3N4RQ9 / B09SYST3FB / B09XQMNLKM mosquito screens (error / blocked / no featured); B082T33JMH colander diverter (unavailable); B01M1F594C Flex-Drain vinyl (no featured).

Amazon Associate disclosure. As an Amazon Associate, we earn from qualifying purchases.

Kind	Pack	Listing	ASIN	USD
Vinyl K-style slip joint	Amerimax · 5 in · 2-pc	Gutter Slip Joint Connector, K-Style, Traditional, Vinyl, White, 2-Pc., 5-In.Featured one-time $16.79. Iowa PM 3017 names vinyl gutters with slip joints and clip brackets for seasonal removal. This listing is a joiner, not a 10-ft gutter section. 10-ft vinyl/aluminum sections fetched tonight were unavailable or had no featured price.	B09ZFCJND1	$16.79
5-inch fascia bracket	Amerimax · galvanized steel · 2-pc	AMERIMAX HOME PRODUCTS 33022-CENTRAL 5-Inch Fascia Bracket, White, 2-PieceFeatured one-time $28.03. House fascia hanger, not a high-tunnel hip-board bracket. UMD attaches gutter brackets to the hip board; Iowa uses three vinyl brackets per 10-ft section on a sloped support board. Seller “snap on” copy is seller claim, not a hoop-house spec.	B000DZCZ1E	$28.03
Rain-barrel downspout diverter	WADEO · 2×3 in · 5 ft hose	WADEO Downspout Diverter, Rain Barrel Diverter Fits for 2"x 3" Standard Downspout, Rainwater Collection System with Two Water Outlets to Collect Rainwater from Gutter, with 5FT HoseFeatured one-time $17.99. Listing: 2×3-inch rectangular downspouts. Seller 85%/65% capture lines are seller claims. This is a barrel diverter, not a first-flush chamber. First-flush ASINs fetched tonight were unavailable or had no featured price.	B0F1TNSN21	$17.99
Submersible utility pump	91250 · 1/4 HP · 10 ft cord	Superior Pump 91250 1800GPH Thermoplastic Submersible Utility Pump with 10-Foot Cord, 1/4 HPFeatured one-time $68.19. UMD: a submersible sump pump in the IBC tote. Iowa: small electric diaphragm pumps for drip. Seller 1,800 GPH / 1/4 HP copy is seller claim, not a hoop-house irrigation spec. Filter before drip — Iowa names a 200-mesh filter; the Y-filter row is 150-mesh.	B00N0TAG9S	$68.19
Inline drip Y filter	Raindrip R605DT · 3/4 in · 150 mesh	Raindrip R605DT "Y" Filter, 3/4-Inch MPT X 3/4-Inch MPT, for Drip Irrigation Systems, Connect to Pipe such as Sprinkler Riser, Removable Filter, BlackFeatured one-time $14.28. Listing: 150-mesh removable filter. Iowa PM 3017 irrigation list names a 200-mesh filter — this SKU is not that mesh. Drip tubing and emitters stay on the drip-irrigation page.	B0007WO6C4	$14.28

EQIP pays for the structure, not the gutter

Vinyl sections, hangers, diverters, barrels, totes, pumps, and filters sit outside the High Tunnel System Initiative payment unless your county office writes an associated practice in. Confirm with your NRCS district conservationist. Tunnel Spec does not invent a dollar.

Producers can install heating, ventilation, or electrical systems at their own expense.
Source: USDA NRCS Pennsylvania — Seasonal High Tunnel System for Crops. One state office page, not a national gutter payment.

The practice does not include greenhouses or low tunnel systems.
Source: NRCS Conservation Practice Standard 325 High Tunnel System. FarmTek’s gutter saddles are labeled for Arch-Type and A-Frame greenhouses. More exclusions: what EQIP will not pay for.

Rules vary; call your county NRCS office.

FAQ

Do I need gutters on a high tunnel?: NRCS Conservation Practice Standard 325 says high tunnels shed a large amount of water and can create drainage and ponding; direct runoff away from the structure, and provide a detention basin, storage reservoir, or stable outlet when cover runoff can erode the ground. Iowa PM 3017: without elevation or perimeter drainage tile, water puddles along the sides, erodes soil, and saturates the inside edge. Gutters are one option. CPS 558 also names ground gutters — rock-lined channels, rock-filled trenches with subsurface drains, or concrete channels — when roof gutters are not feasible. Indiana’s January 2024 implementation sheet (Indiana, not national) names gutters, rock trenches, underground outlets, or diversions when needed. The national High Tunnel System Initiative FAQ is silent on gutters.
Does EQIP pay for high-tunnel gutters, rain barrels, or cisterns?: Tunnel Spec does not invent eligibility or dollars. The High Tunnel System Initiative FAQ says financial assistance is provided only for the structure itself; the grower is responsible for electricity, venting, lighting, and similar additions. That FAQ does not name gutters, cisterns, Practice 558, or Practice 620. CPS 325 tells planners to plan supportive practices for erosion, irrigation, and runoff, and to use 558 and 620 criteria when designing runoff structures — that is a design consideration, not a printed gutter payment. The EQIP High Tunnel Initiative supporting-practices list names Underground Outlet (among others) and does not name Roof Runoff Structure 558 or Irrigation Reservoir. Indiana’s 325 implementation sheet lists Roof Runoff Structure 558 and Irrigation Reservoir 436 among planned associated practices, and names gutters as a water-management option — that sheet is Indiana. UMD says NRCS may have funding for rainwater harvesting and that EQIP assists high-tunnel installation; it does not print a gutter dollar. Confirm with your county NRCS office. See what EQIP will not pay for.
How much rain runs off a 30×96 high tunnel?: Use the conversion 1 inch of rain on 1 square foot ≈ 0.623 gallons (144 cubic inches per square-foot-inch ÷ 231 cubic inches per gallon). Footprint 30 × 96 = 2,880 sq ft. 2,880 × 0.623 = 1,794.24 gallons per inch of rain on the full footprint. University of Maryland Extension writes the same arithmetic as inches × sq ft × 144 / 231. Iowa PM 3017 prints about 900 gallons from a 30′ × 96′ roof in a half-inch rain. UMD notes arched-side houses lose footprint because gutters sit on hip boards — measure width between gutters, not wall-to-wall, on a Quonset. This page does not invent a local rainfall total.
Can I irrigate food crops with rain collected off the plastic?: Iowa PM 3017: use collected runoff only through drip; do not drink it or overhead-irrigate food crops because of potentially high bacteria. Rutgers FS1218: apply harvested rainwater to the soil, possibly through drip, not onto the plant; water in the morning and do not harvest right after watering. UMD cites that Rutgers treatment (bleach solution) plus drip and delayed harvest; it also names peracetic acid / SaniDate 12.0 as an EPA-registered pre-harvest agricultural-water treatment. CPS 558: the operator is responsible for quality for the intended purpose. CPS 325: captured runoff should not be the only irrigation source. Filter and pump into drip — hardware notes stay on high-tunnel drip irrigation. This is not food-safety legal advice.
Where do gutters go on gothic vs Quonset hoops?: UMD: brackets attach to the hip board; arched sides lose collection footprint versus a straight-wall house because gutters sit on those hip boards. Iowa: gothic buildings can take a support board just below the ribbon (hip) board; Quonset curved sides need a 2×4 split diagonally so the gutter brackets sit on a more vertical face; slope 6–8 inches per 100 feet toward the tank. Iowa prefers vinyl slip-joint gutters for seasonal removal; metal is more likely to tear film. Indiana (labeled Indiana): if gutters are installed, remove them before snow, ice, or high wind. Geometry notes stay on gothic vs Quonset; snow-prep stays on high-tunnel snow removal.
Is it legal to catch rain off a high tunnel?: CPS 325 says runoff may be captured for irrigation if allowed by State law, and should not be the only irrigation water. NCSL (8 September 2025): some states control who may use rain; Colorado is the example, with 2009 limited collection, and 18 other states set limits; most states and territories give free rein. Check your state. The High Tunnel System Initiative FAQ still requires a viable irrigation source and proof of legal access to water before a high tunnel is designed. Not legal advice.

Rules vary; call your county NRCS office. Tunnel Spec does not determine eligibility, payment rates, or inspection outcomes. Confirm runoff practices and harvested-rainwater use with your NRCS district conservationist and your state. Not legal advice. Not food-safety legal advice. As an Amazon Associate, we earn from qualifying purchases.