Document a hydrilla mat at Johnson Park on Lake Marble Falls, site 1, Johnson Park (City of Marble Falls Parks and Recreation Department), 230 S. Avenue J, Marble Falls, TX 78654 (2026-07-29)

Hydrilla is one of the invasive aquatic plants LCRA and Texas Parks and Wildlife Department actively manage on the Highland Lakes, and a visible mat near this public dock and boat ramp has no dated photo record to prioritize it for the permitted in-water removal crew. Standard: US EPA Rapid Bioassessment Protocols plus Texas Parks and Wildlife Department and LCRA aquatic invasive species management guidance (all vegetation management on Lake Buchanan, Inks Lake, Lake LBJ, Lake Marble Falls, or Lake Travis requires advance TPWD and LCRA approval), applied here to the Highland Lakes reservoir chain at Marble Falls, Burnet County and Kingsland, Llano County, Texas. SDG 6.3 and 6.6. Proof: document only stand off photo log plus mat size and location note plus GPS plus ranked follow on note Method (US EPA Rapid Bioassessment Protocols plus Texas Parks and Wildlife Department and LCRA aquatic invasive species management guidance (all vegetation management on Lake Buchanan, Inks Lake, Lake LBJ, Lake Marble Falls, or Lake Travis requires advance TPWD and LCRA approval), applied here to the Highland Lakes reservoir chain at Marble Falls, Burnet County and Kingsland, Llano County, Texas. SDG 6.3 and 6.6.): 1. 1. From the public dock, boat ramp, or shoreline at Johnson Park, photograph any visible underwater hydrilla mat without entering the water. 2. 2. Note the approximate size and depth of the mat and its position relative to a fixed shoreline landmark. 3. 3. Photograph the nearest dock post, ramp sign, or landmark for the crew's reference. 4. 4. Record a ranked follow on note naming the mat and its landmark for the in-water removal crew. Done when: document only stand off photo log plus mat size and location note plus GPS plus ranked follow on note

Where

Johnson Park (City of Marble Falls Parks and Recreation Department), 230 S. Avenue J, Marble Falls, TX 78654

Pay

$90 proposed

This packet is not funded yet, so this figure is a proposed price and not money waiting in escrow. If a buyer funds it, approved proof settles that price onchain. If nobody funds it, approved proof earns provable credit toward the work instead of cash. You see which before you claim, never after.

Proof

document only stand off photo log plus mat size and location note plus GPS plus ranked follow on note

This is exactly what gets it approved. Nothing settles without it.

Level

entry

Open until

2026-10-28

How this work is done

A documented method, so this packet comes out the same whoever does it. Typically 30–60 minutes. Method of record: EPA dry-weather / AMD field screening

Bring

• GPS phone
• pH meter or strips
• conductivity meter
• ammonia + iron test kit as specified
• surfactant screen if specified
• gloves
• camera

Steps

1. 1. Navigate to the outfall/reach; record GPS; photograph it, capturing any visible flow or staining.
2. 2. Note whether flow is present in dry weather (yes/no).
3. 3. Measure and record pH, conductivity, and each specified analyte per kit instructions.
4. 4. Log any color, odor, floc, or aquatic-life observation.
5. 5. Enter all readings with units, GPS, time, and photos into the proof record; sign.

If it does not match the plan

• Dry-weather flow present with elevated conductivity/ammonia/surfactants -> flag suspected illicit discharge for the responsible agency.
• pH < 6 with visible iron floc -> tag suspected acid mine drainage; recommend metals lab panel.

What counts as done

• pH + conductivity recorded with units
• Each specified analyte recorded with a value
• Dry-weather flow present? recorded yes/no
• GPS waypoint + timestamped photo

Proof is measured against these, not judged by taste.