{ "claims": [ { "claim": { "claim_id": "claim-del-valle-boat-inspection", "evidence_ids": [ "evidence-del-valle-boat-inspection", "evidence-del-valle-ebrpd-boat-inspection", "evidence-ebrpd-mussels-del-valle-inspection" ], "predicate": "boat_inspection_required", "spatial_scope_ids": [ "scope-lake-del-valle" ], "subject_id": "lake-del-valle", "temporal_scope": null, "value": true }, "evidence": [ { "claim_id": "claim-del-valle-boat-inspection", "evidence_id": "evidence-del-valle-boat-inspection", "notes": "", "observation_id": "observation-del-valle-boating-swimming", "stance": "supports" }, { "claim_id": "claim-del-valle-boat-inspection", "evidence_id": "evidence-del-valle-ebrpd-boat-inspection", "notes": "", "observation_id": "observation-del-valle-ebrpd-golden-mussel", "stance": "supports" }, { "claim_id": "claim-del-valle-boat-inspection", "evidence_id": "evidence-ebrpd-mussels-del-valle-inspection", "notes": "", "observation_id": "observation-ebrpd-mussels-program-scope", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page lists two swimming beaches, lifeguards during posted periods, boat rentals, and a public launch for boats of any size; it warns that boaters must comply with the Invasive Mussel Prevention Program and mandatory inspections.", "observation_id": "observation-del-valle-boating-swimming", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-reserveamerica-del-valle-overview-110003" }, { "artifact_refs": [], "content": "At retrieval, the page stated that a boat launched at Contra Loma would be quarantined for 30 days from inspected lakes including Del Valle; vessels must be cleaned, drained, and dried, and boat bands are honored only by the lake that issued them. It also requires campground guests with watercraft to complete inspection before campground check-in.", "observation_id": "observation-del-valle-ebrpd-golden-mussel", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "EBRPD requires watercraft inspection at Contra Loma, Del Valle, Lake Chabot, Quarry Lakes, and Shadow Cliffs. Covered craft include boats, kayaks, canoes, sailboats, inflatable craft, and every form of floating board. Campers with watercraft must complete inspection before campground check-in.", "observation_id": "observation-ebrpd-mussels-program-scope", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-invasive-mussel-program" } ], "sources": [ { "locator": "https://www.reserveamerica.com/explore/del-valle/EB/110003/overview", "publisher": "ReserveAmerica / East Bay Regional Park District", "source_id": "source-reserveamerica-del-valle-overview-110003" }, { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" }, { "locator": "https://www.ebparks.org/recreation/boating/invasive-mussels", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-invasive-mussel-program" } ] }, { "claim": { "claim_id": "claim-del-valle-campground-inventory", "evidence_ids": [ "evidence-del-valle-campground-inventory", "evidence-del-valle-ebrpd-campground-inventory", "evidence-del-valle-camping-current-inventory" ], "predicate": "site_inventory", "spatial_scope_ids": [ "scope-del-valle-family-campground" ], "subject_id": "campground-del-valle-family", "temporal_scope": null, "value": { "cabins": 5, "drive_up_tent": 124, "rv_full_hookup": 21, "total": 150 } }, "evidence": [ { "claim_id": "claim-del-valle-campground-inventory", "evidence_id": "evidence-del-valle-campground-inventory", "notes": "", "observation_id": "observation-del-valle-campground-inventory", "stance": "supports" }, { "claim_id": "claim-del-valle-campground-inventory", "evidence_id": "evidence-del-valle-ebrpd-campground-inventory", "notes": "", "observation_id": "observation-del-valle-ebrpd-campground", "stance": "supports" }, { "claim_id": "claim-del-valle-campground-inventory", "evidence_id": "evidence-del-valle-camping-current-inventory", "notes": "", "observation_id": "observation-del-valle-camping-inventory", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page describes Del Valle Family Campground as 150 campsites: 21 RV sites with full hookups, 124 drive-up tent sites, and five cabins, served by centrally located toilets and showers.", "observation_id": "observation-del-valle-campground-inventory", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-reserveamerica-del-valle-overview-110003" }, { "artifact_refs": [], "content": "The EBRPD page states that the family campground has 150 sites, including two accessible sites and 21 sites with water, sewage, and 120-volt 50/30-amp electrical hookups; toilets and showers are centrally located. It separately states that five cabin sites take up to eight people and sleep five.", "observation_id": "observation-del-valle-ebrpd-campground", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The current camping page lists 150 family sites: 21 full-hookup RV sites, 124 drive-up tent sites, and five cabins; all family sites allow at most eight people and two vehicles.", "observation_id": "observation-del-valle-camping-inventory", "observed_at": null, "observer": "Wayproof source review", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-camping" } ], "sources": [ { "locator": "https://www.reserveamerica.com/explore/del-valle/EB/110003/overview", "publisher": "ReserveAmerica / East Bay Regional Park District", "source_id": "source-reserveamerica-del-valle-overview-110003" }, { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" }, { "locator": "https://www.ebparks.org/parks/del-valle/camping", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-camping" } ] }, { "claim": { "claim_id": "claim-del-valle-campground-sanitation", "evidence_ids": [ "evidence-del-valle-campground-sanitation", "evidence-del-valle-ebrpd-campground-sanitation" ], "predicate": "shared_facilities", "spatial_scope_ids": [ "scope-del-valle-family-campground" ], "subject_id": "campground-del-valle-family", "temporal_scope": null, "value": [ "toilets", "showers" ] }, "evidence": [ { "claim_id": "claim-del-valle-campground-sanitation", "evidence_id": "evidence-del-valle-campground-sanitation", "notes": "", "observation_id": "observation-del-valle-campground-inventory", "stance": "supports" }, { "claim_id": "claim-del-valle-campground-sanitation", "evidence_id": "evidence-del-valle-ebrpd-campground-sanitation", "notes": "", "observation_id": "observation-del-valle-ebrpd-campground", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page describes Del Valle Family Campground as 150 campsites: 21 RV sites with full hookups, 124 drive-up tent sites, and five cabins, served by centrally located toilets and showers.", "observation_id": "observation-del-valle-campground-inventory", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-reserveamerica-del-valle-overview-110003" }, { "artifact_refs": [], "content": "The EBRPD page states that the family campground has 150 sites, including two accessible sites and 21 sites with water, sewage, and 120-volt 50/30-amp electrical hookups; toilets and showers are centrally located. It separately states that five cabin sites take up to eight people and sleep five.", "observation_id": "observation-del-valle-ebrpd-campground", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.reserveamerica.com/explore/del-valle/EB/110003/overview", "publisher": "ReserveAmerica / East Bay Regional Park District", "source_id": "source-reserveamerica-del-valle-overview-110003" }, { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-arroyo-staging", "evidence_ids": [ "evidence-del-valle-ebrpd-arroyo-staging" ], "predicate": "accesses", "spatial_scope_ids": [ "scope-del-valle-arroyo-staging" ], "subject_id": "staging-del-valle-arroyo-road", "temporal_scope": null, "value": "park-del-valle-regional-park" }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-arroyo-staging", "evidence_id": "evidence-del-valle-ebrpd-arroyo-staging", "notes": "", "observation_id": "observation-del-valle-ebrpd-access", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page distinguishes the fee-charging main entrance on Del Valle Road from the no-fee Arroyo Road Staging Area and lists two Del Valle Road walk-in entrances.", "observation_id": "observation-del-valle-ebrpd-access", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-boat-speed", "evidence_ids": [ "evidence-del-valle-ebrpd-boat-speed", "evidence-ordinance38-del-valle-boat-speed" ], "predicate": "boat_speed_limit_mph", "spatial_scope_ids": [ "scope-lake-del-valle" ], "subject_id": "lake-del-valle", "temporal_scope": null, "value": 10 }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-boat-speed", "evidence_id": "evidence-del-valle-ebrpd-boat-speed", "notes": "", "observation_id": "observation-del-valle-ebrpd-boating", "stance": "supports" }, { "claim_id": "claim-del-valle-ebrpd-boat-speed", "evidence_id": "evidence-ordinance38-del-valle-boat-speed", "notes": "Section 503.6(a).", "observation_id": "observation-ebrpd-ordinance-38-del-valle-boating", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page lists launch and inspection fees of $5 and $10 for motorized vessels and $3 and $5 for non-motorized vessels, a lake-wide 10 mph speed limit, and a prohibition on hydrofoils and E-Foils. It permits any-size boats at the public ramp.", "observation_id": "observation-del-valle-ebrpd-boating", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [ "PDF pages 16, 18-19" ], "content": "Sections 501.2 and 503.4-503.9 allow car-top and trailered boats at Del Valle without size restriction; limit use to sunrise-sunset or posted hours; cap gasoline-powered boats at 10 mph; prohibit towing people and fuel/oil pollution; and regulate proximity to swim areas and swimmers.", "observation_id": "observation-ebrpd-ordinance-38-del-valle-boating", "observed_at": "2023-09-01T00:00:00+00:00", "observer": "Wayproof source review", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-ordinance-38-september-2023" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" }, { "locator": "https://www.ebparks.org/sites/default/files/Ord38-09052023FINAL.pdf", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-ordinance-38-september-2023" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-boating-fees", "evidence_ids": [ "evidence-del-valle-ebrpd-boating-fees" ], "predicate": "published_boating_fees", "spatial_scope_ids": [ "scope-lake-del-valle" ], "subject_id": "lake-del-valle", "temporal_scope": null, "value": { "motorized_inspection_usd": 10, "motorized_launch_usd": 5, "non_motorized_inspection_usd": 5, "non_motorized_launch_usd": 3 } }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-boating-fees", "evidence_id": "evidence-del-valle-ebrpd-boating-fees", "notes": "", "observation_id": "observation-del-valle-ebrpd-boating", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page lists launch and inspection fees of $5 and $10 for motorized vessels and $3 and $5 for non-motorized vessels, a lake-wide 10 mph speed limit, and a prohibition on hydrofoils and E-Foils. It permits any-size boats at the public ramp.", "observation_id": "observation-del-valle-ebrpd-boating", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-cabins", "evidence_ids": [ "evidence-del-valle-ebrpd-cabins", "evidence-del-valle-camping-current-cabins" ], "predicate": "cabin_inventory", "spatial_scope_ids": [ "scope-del-valle-family-campground" ], "subject_id": "campground-del-valle-family", "temporal_scope": null, "value": { "cabin_sleeping_capacity": 5, "maximum_advance_weeks": 12, "maximum_people_per_site": 8, "minimum_advance_business_days": 3, "reservation_channel": "phone_only", "sites": 5, "year_round_pilot": true } }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-cabins", "evidence_id": "evidence-del-valle-ebrpd-cabins", "notes": "", "observation_id": "observation-del-valle-ebrpd-campground", "stance": "supports" }, { "claim_id": "claim-del-valle-ebrpd-cabins", "evidence_id": "evidence-del-valle-camping-current-cabins", "notes": "", "observation_id": "observation-del-valle-cabin-faq-operations", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The EBRPD page states that the family campground has 150 sites, including two accessible sites and 21 sites with water, sewage, and 120-volt 50/30-amp electrical hookups; toilets and showers are centrally located. It separately states that five cabin sites take up to eight people and sleep five.", "observation_id": "observation-del-valle-ebrpd-campground", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The FAQ describes five year-round pilot cabins, phone-only booking three business days to twelve weeks ahead, prices, deposits, stay limits, occupancy, vehicles, accessibility, check-in/out, no-show handling, and cancellation tiers.", "observation_id": "observation-del-valle-cabin-faq-operations", "observed_at": null, "observer": "Wayproof source review", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-cabin-faq" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" }, { "locator": "https://www.ebparks.org/recreation/camping/cabin-camping-faqs", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-cabin-faq" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-camp-store-schedule", "evidence_ids": [ "evidence-del-valle-ebrpd-camp-store-schedule" ], "predicate": "published_seasonal_schedule", "spatial_scope_ids": [ "scope-del-valle-park" ], "subject_id": "facility-del-valle-camp-store", "temporal_scope": null, "value": { "november_december": "closed", "october": "Friday-Sunday limited hours", "september": "daily 06:00-19:00", "year_stated": false } }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-camp-store-schedule", "evidence_id": "evidence-del-valle-ebrpd-camp-store-schedule", "notes": "", "observation_id": "observation-del-valle-ebrpd-seasonal-stores", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page publishes September-December operating and rental hours for the marina store and September-December hours for the camp store, including weather-dependent first-come boat rentals and closures on some days; the displayed schedule does not state an effective year.", "observation_id": "observation-del-valle-ebrpd-seasonal-stores", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-campground-accessibility", "evidence_ids": [ "evidence-del-valle-ebrpd-campground-accessibility" ], "predicate": "accessibility_features", "spatial_scope_ids": [ "scope-del-valle-family-campground" ], "subject_id": "campground-del-valle-family", "temporal_scope": null, "value": { "bathroom_buildings_wheelchair_accessible": true, "many_water_fountains_wheelchair_accessible": true, "wheelchair_accessible_sites": 2 } }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-campground-accessibility", "evidence_id": "evidence-del-valle-ebrpd-campground-accessibility", "notes": "", "observation_id": "observation-del-valle-ebrpd-campground", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The EBRPD page states that the family campground has 150 sites, including two accessible sites and 21 sites with water, sewage, and 120-volt 50/30-amp electrical hookups; toilets and showers are centrally located. It separately states that five cabin sites take up to eight people and sleep five.", "observation_id": "observation-del-valle-ebrpd-campground", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-clean-drain-dry", "evidence_ids": [ "evidence-del-valle-ebrpd-clean-drain-dry", "evidence-ebrpd-mussels-clean-drain-dry" ], "predicate": "watercraft_preparation", "spatial_scope_ids": [ "scope-lake-del-valle" ], "subject_id": "lake-del-valle", "temporal_scope": { "ends_on": "2026-09-20", "starts_on": "2026-09-20" }, "value": [ "clean", "drain", "dry" ] }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-clean-drain-dry", "evidence_id": "evidence-del-valle-ebrpd-clean-drain-dry", "notes": "", "observation_id": "observation-del-valle-ebrpd-golden-mussel", "stance": "supports" }, { "claim_id": "claim-del-valle-ebrpd-clean-drain-dry", "evidence_id": "evidence-ebrpd-mussels-clean-drain-dry", "notes": "", "observation_id": "observation-ebrpd-mussels-contra-loma", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "At retrieval, the page stated that a boat launched at Contra Loma would be quarantined for 30 days from inspected lakes including Del Valle; vessels must be cleaned, drained, and dried, and boat bands are honored only by the lake that issued them. It also requires campground guests with watercraft to complete inspection before campground check-in.", "observation_id": "observation-del-valle-ebrpd-golden-mussel", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The current notice reports golden mussels at Contra Loma and states that a boat launched there is quarantined for 30 days from inspected lakes including Del Valle. All vessels should be cleaned, drained, and dried, and bands are honored only at their issuing lake.", "observation_id": "observation-ebrpd-mussels-contra-loma", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-invasive-mussel-program" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" }, { "locator": "https://www.ebparks.org/recreation/boating/invasive-mussels", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-invasive-mussel-program" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-concession-outback", "evidence_ids": [ "evidence-del-valle-ebrpd-concession-outback" ], "predicate": "provides_service_at", "spatial_scope_ids": [ "scope-del-valle-east-beach-marina" ], "subject_id": "org-outback-adventures", "temporal_scope": null, "value": { "facility": "facility-del-valle-east-beach-marina", "service": "kayak_and_paddleboard_rentals" } }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-concession-outback", "evidence_id": "evidence-del-valle-ebrpd-concession-outback", "notes": "", "observation_id": "observation-del-valle-ebrpd-concessioners", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page directs motorboat and patio-boat rental questions to Rocky Mountain Recreation and seasonal kayak and paddleboard rental questions to Outback Adventures.", "observation_id": "observation-del-valle-ebrpd-concessioners", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-concession-rocky-mountain", "evidence_ids": [ "evidence-del-valle-ebrpd-concession-rocky-mountain" ], "predicate": "provides_service_at", "spatial_scope_ids": [ "scope-del-valle-east-beach-marina" ], "subject_id": "org-rocky-mountain-recreation", "temporal_scope": null, "value": { "facility": "facility-del-valle-east-beach-marina", "service": "motorboat_and_patio_boat_rentals" } }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-concession-rocky-mountain", "evidence_id": "evidence-del-valle-ebrpd-concession-rocky-mountain", "notes": "", "observation_id": "observation-del-valle-ebrpd-concessioners", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page directs motorboat and patio-boat rental questions to Rocky Mountain Recreation and seasonal kayak and paddleboard rental questions to Outback Adventures.", "observation_id": "observation-del-valle-ebrpd-concessioners", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-contra-loma-quarantine", "evidence_ids": [ "evidence-del-valle-ebrpd-contra-loma-quarantine", "evidence-ebrpd-mussels-contra-loma-quarantine" ], "predicate": "cross_lake_boat_quarantine", "spatial_scope_ids": [ "scope-lake-del-valle" ], "subject_id": "lake-del-valle", "temporal_scope": { "ends_on": "2026-09-20", "starts_on": "2026-09-20" }, "value": { "duration_days": 30, "restricted_destination": "Lake Del Valle", "trigger_lake": "Contra Loma Reservoir" } }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-contra-loma-quarantine", "evidence_id": "evidence-del-valle-ebrpd-contra-loma-quarantine", "notes": "", "observation_id": "observation-del-valle-ebrpd-golden-mussel", "stance": "supports" }, { "claim_id": "claim-del-valle-ebrpd-contra-loma-quarantine", "evidence_id": "evidence-ebrpd-mussels-contra-loma-quarantine", "notes": "", "observation_id": "observation-ebrpd-mussels-contra-loma", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "At retrieval, the page stated that a boat launched at Contra Loma would be quarantined for 30 days from inspected lakes including Del Valle; vessels must be cleaned, drained, and dried, and boat bands are honored only by the lake that issued them. It also requires campground guests with watercraft to complete inspection before campground check-in.", "observation_id": "observation-del-valle-ebrpd-golden-mussel", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The current notice reports golden mussels at Contra Loma and states that a boat launched there is quarantined for 30 days from inspected lakes including Del Valle. All vessels should be cleaned, drained, and dried, and bands are honored only at their issuing lake.", "observation_id": "observation-ebrpd-mussels-contra-loma", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-invasive-mussel-program" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" }, { "locator": "https://www.ebparks.org/recreation/boating/invasive-mussels", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-invasive-mussel-program" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-east-beach-algae", "evidence_ids": [ "evidence-del-valle-ebrpd-east-beach-algae", "evidence-ebrpd-algae-east-beach-caution", "evidence-ebrpd-swimming-east-caution", "evidence-ebrpd-water-quality-east-caution" ], "predicate": "water_quality_advisory", "spatial_scope_ids": [ "scope-del-valle-east-beach" ], "subject_id": "beach-del-valle-east", "temporal_scope": { "ends_on": "2026-09-20", "starts_on": "2026-09-20" }, "value": "caution" }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-east-beach-algae", "evidence_id": "evidence-del-valle-ebrpd-east-beach-algae", "notes": "", "observation_id": "observation-del-valle-ebrpd-water-quality", "stance": "supports" }, { "claim_id": "claim-del-valle-ebrpd-east-beach-algae", "evidence_id": "evidence-ebrpd-algae-east-beach-caution", "notes": "", "observation_id": "observation-ebrpd-algae-current-del-valle", "stance": "supports" }, { "claim_id": "claim-del-valle-ebrpd-east-beach-algae", "evidence_id": "evidence-ebrpd-swimming-east-caution", "notes": "", "observation_id": "observation-ebrpd-swimming-current-beaches", "stance": "supports" }, { "claim_id": "claim-del-valle-ebrpd-east-beach-algae", "evidence_id": "evidence-ebrpd-water-quality-east-caution", "notes": "", "observation_id": "observation-ebrpd-water-quality-current-del-valle", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "At retrieval, the EBRPD page posted a blue-green algae Caution Advisory for the East Swim Beach and stated that the West Swim Beach had no water because of low lake levels.", "observation_id": "observation-del-valle-ebrpd-water-quality", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "At retrieval, the current-conditions table listed a Caution Advisory for the Del Valle East Swim Beach and no advisory for the West Swim Beach, where it reported no water because of low lake levels.", "observation_id": "observation-ebrpd-algae-current-del-valle", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-blue-green-algae" }, { "artifact_refs": [], "content": "At retrieval, East Beach had a blue-green algae Caution Advisory and West Beach had no water because of low lake levels.", "observation_id": "observation-ebrpd-swimming-current-beaches", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-swimming" }, { "artifact_refs": [], "content": "At retrieval, the table listed a Caution algae advisory at Del Valle East Beach and no advisory at West Beach, where there was no water because of low lake levels.", "observation_id": "observation-ebrpd-water-quality-current-del-valle", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-current-water-quality" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" }, { "locator": "https://www.ebparks.org/natural-resources/water-quality/blue-green-algae", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-blue-green-algae" }, { "locator": "https://www.ebparks.org/recreation/swimming/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-swimming" }, { "locator": "https://www.ebparks.org/natural-resources/water-quality", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-current-water-quality" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-entry-fees", "evidence_ids": [ "evidence-del-valle-ebrpd-entry-fees" ], "predicate": "published_entry_fees", "spatial_scope_ids": [ "scope-del-valle-park" ], "subject_id": "park-del-valle-regional-park", "temporal_scope": null, "value": { "arroyo_staging_parking_usd": 0, "bus_parking_usd": 25, "flat_entry_excludes": [ "fishing_permit", "mussel_inspection" ], "flat_entry_includes": [ "vehicle_parking", "trailer_parking", "boat_launch" ], "flat_entry_season": "April through Labor Day", "trailered_vehicle_parking_usd": 5, "vehicle_parking_usd": 5, "weekend_holiday_flat_entry_usd": 10 } }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-entry-fees", "evidence_id": "evidence-del-valle-ebrpd-entry-fees", "notes": "", "observation_id": "observation-del-valle-ebrpd-fees", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page lists $5 vehicle parking, $5 trailered-vehicle parking, $25 bus parking, and no parking fee at Arroyo staging. On weekends and holidays from April through Labor Day it lists a $10 flat entry fee including vehicle and trailer parking and boat launch, excluding fishing permits and mussel inspection.", "observation_id": "observation-del-valle-ebrpd-fees", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-food-concession", "evidence_ids": [ "evidence-del-valle-ebrpd-food-concession" ], "predicate": "swim_beach_food_concession", "spatial_scope_ids": [ "scope-del-valle-park" ], "subject_id": "park-del-valle-regional-park", "temporal_scope": { "ends_on": "2026-09-20", "starts_on": "2026-09-20" }, "value": "closed_until_further_notice" }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-food-concession", "evidence_id": "evidence-del-valle-ebrpd-food-concession", "notes": "", "observation_id": "observation-del-valle-ebrpd-current-amenities", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "At retrieval, the park was open with limited amenities; the swim-beach food concession was closed until further notice, storm-damaged trails required caution, construction equipment or noise could be present during working hours, and the visitor center was open.", "observation_id": "observation-del-valle-ebrpd-current-amenities", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-hydrofoil-prohibition", "evidence_ids": [ "evidence-del-valle-ebrpd-hydrofoil-prohibition" ], "predicate": "prohibited_watercraft", "spatial_scope_ids": [ "scope-lake-del-valle" ], "subject_id": "lake-del-valle", "temporal_scope": null, "value": [ "hydrofoil", "e_foil" ] }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-hydrofoil-prohibition", "evidence_id": "evidence-del-valle-ebrpd-hydrofoil-prohibition", "notes": "", "observation_id": "observation-del-valle-ebrpd-boating", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page lists launch and inspection fees of $5 and $10 for motorized vessels and $3 and $5 for non-motorized vessels, a lake-wide 10 mph speed limit, and a prohibition on hydrofoils and E-Foils. It permits any-size boats at the public ramp.", "observation_id": "observation-del-valle-ebrpd-boating", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-main-entrance", "evidence_ids": [ "evidence-del-valle-ebrpd-main-entrance" ], "predicate": "accesses", "spatial_scope_ids": [ "scope-del-valle-main-entrance" ], "subject_id": "entrance-del-valle-main", "temporal_scope": null, "value": "park-del-valle-regional-park" }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-main-entrance", "evidence_id": "evidence-del-valle-ebrpd-main-entrance", "notes": "", "observation_id": "observation-del-valle-ebrpd-access", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page distinguishes the fee-charging main entrance on Del Valle Road from the no-fee Arroyo Road Staging Area and lists two Del Valle Road walk-in entrances.", "observation_id": "observation-del-valle-ebrpd-access", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-marina-schedule", "evidence_ids": [ "evidence-del-valle-ebrpd-marina-schedule" ], "predicate": "published_seasonal_schedule", "spatial_scope_ids": [ "scope-del-valle-east-beach-marina" ], "subject_id": "facility-del-valle-east-beach-marina", "temporal_scope": null, "value": { "boat_rentals": "weather_permitting_first_come", "period": "September through December", "year_stated": false } }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-marina-schedule", "evidence_id": "evidence-del-valle-ebrpd-marina-schedule", "notes": "", "observation_id": "observation-del-valle-ebrpd-seasonal-stores", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page publishes September-December operating and rental hours for the marina store and September-December hours for the camp store, including weather-dependent first-come boat rentals and closures on some days; the displayed schedule does not state an effective year.", "observation_id": "observation-del-valle-ebrpd-seasonal-stores", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-park-area", "evidence_ids": [ "evidence-del-valle-ebrpd-park-area" ], "predicate": "published_area_acres", "spatial_scope_ids": [ "scope-del-valle-park" ], "subject_id": "park-del-valle-regional-park", "temporal_scope": null, "value": 4395 }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-park-area", "evidence_id": "evidence-del-valle-ebrpd-park-area", "notes": "", "observation_id": "observation-del-valle-ebrpd-identity", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The EBRPD page places Del Valle ten miles south of Livermore, describes a five-mile lake in a 4,395-acre park, gives the address 7000 Del Valle Road, and calls the park the eastern gateway to the 28-mile Ohlone Wilderness Trail.", "observation_id": "observation-del-valle-ebrpd-identity", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-park-curfew", "evidence_ids": [ "evidence-del-valle-ebrpd-park-curfew" ], "predicate": "curfew", "spatial_scope_ids": [ "scope-del-valle-park" ], "subject_id": "park-del-valle-regional-park", "temporal_scope": null, "value": { "ends": "05:00", "starts": "22:00" } }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-park-curfew", "evidence_id": "evidence-del-valle-ebrpd-park-curfew", "notes": "", "observation_id": "observation-del-valle-ebrpd-hours", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page gives a 10 PM to 5 AM park curfew and seasonal park gate hours: 7 AM-6 PM January-February, 6 AM-7 PM March, 6 AM-8 PM April, 6 AM-9 PM May through Labor Day, 6 AM-8 PM after Labor Day through September 30, 6 AM-7 PM October, and 7 AM-6 PM November-December.", "observation_id": "observation-del-valle-ebrpd-hours", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-park-gate-hours", "evidence_ids": [ "evidence-del-valle-ebrpd-park-gate-hours" ], "predicate": "seasonal_gate_hours", "spatial_scope_ids": [ "scope-del-valle-park" ], "subject_id": "park-del-valle-regional-park", "temporal_scope": null, "value": { "after_labor_day_through_september_30": [ "06:00", "20:00" ], "april": [ "06:00", "20:00" ], "january_february": [ "07:00", "18:00" ], "march": [ "06:00", "19:00" ], "may_through_labor_day": [ "06:00", "21:00" ], "november_december": [ "07:00", "18:00" ], "october": [ "06:00", "19:00" ] } }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-park-gate-hours", "evidence_id": "evidence-del-valle-ebrpd-park-gate-hours", "notes": "", "observation_id": "observation-del-valle-ebrpd-hours", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page gives a 10 PM to 5 AM park curfew and seasonal park gate hours: 7 AM-6 PM January-February, 6 AM-7 PM March, 6 AM-8 PM April, 6 AM-9 PM May through Labor Day, 6 AM-8 PM after Labor Day through September 30, 6 AM-7 PM October, and 7 AM-6 PM November-December.", "observation_id": "observation-del-valle-ebrpd-hours", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-park-open-limited", "evidence_ids": [ "evidence-del-valle-ebrpd-park-open-limited" ], "predicate": "operating_status", "spatial_scope_ids": [ "scope-del-valle-park" ], "subject_id": "park-del-valle-regional-park", "temporal_scope": { "ends_on": "2026-09-20", "starts_on": "2026-09-20" }, "value": "open_limited_amenities" }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-park-open-limited", "evidence_id": "evidence-del-valle-ebrpd-park-open-limited", "notes": "", "observation_id": "observation-del-valle-ebrpd-current-amenities", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "At retrieval, the park was open with limited amenities; the swim-beach food concession was closed until further notice, storm-damaged trails required caution, construction equipment or noise could be present during working hours, and the visitor center was open.", "observation_id": "observation-del-valle-ebrpd-current-amenities", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-rv-hookups", "evidence_ids": [ "evidence-del-valle-ebrpd-rv-hookups" ], "predicate": "rv_hookup_details", "spatial_scope_ids": [ "scope-del-valle-family-campground" ], "subject_id": "campground-del-valle-family", "temporal_scope": null, "value": { "electrical_amps": [ 50, 30 ], "electrical_volts": 120, "sewage": true, "sites": 21, "water": true } }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-rv-hookups", "evidence_id": "evidence-del-valle-ebrpd-rv-hookups", "notes": "", "observation_id": "observation-del-valle-ebrpd-campground", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The EBRPD page states that the family campground has 150 sites, including two accessible sites and 21 sites with water, sewage, and 120-volt 50/30-amp electrical hookups; toilets and showers are centrally located. It separately states that five cabin sites take up to eight people and sleep five.", "observation_id": "observation-del-valle-ebrpd-campground", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-storm-trails", "evidence_ids": [ "evidence-del-valle-ebrpd-storm-trails" ], "predicate": "trail_condition", "spatial_scope_ids": [ "scope-del-valle-park" ], "subject_id": "park-del-valle-regional-park", "temporal_scope": { "ends_on": "2026-09-20", "starts_on": "2026-09-20" }, "value": "storm_damage_use_caution" }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-storm-trails", "evidence_id": "evidence-del-valle-ebrpd-storm-trails", "notes": "", "observation_id": "observation-del-valle-ebrpd-current-amenities", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "At retrieval, the park was open with limited amenities; the swim-beach food concession was closed until further notice, storm-damaged trails required caution, construction equipment or noise could be present during working hours, and the visitor center was open.", "observation_id": "observation-del-valle-ebrpd-current-amenities", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-visitor-center-open", "evidence_ids": [ "evidence-del-valle-ebrpd-visitor-center-open" ], "predicate": "operating_status", "spatial_scope_ids": [ "scope-del-valle-visitor-center" ], "subject_id": "facility-del-valle-visitor-center", "temporal_scope": { "ends_on": "2026-09-20", "starts_on": "2026-09-20" }, "value": "open" }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-visitor-center-open", "evidence_id": "evidence-del-valle-ebrpd-visitor-center-open", "notes": "", "observation_id": "observation-del-valle-ebrpd-current-amenities", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "At retrieval, the park was open with limited amenities; the swim-beach food concession was closed until further notice, storm-damaged trails required caution, construction equipment or noise could be present during working hours, and the visitor center was open.", "observation_id": "observation-del-valle-ebrpd-current-amenities", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ebrpd-west-beach-water", "evidence_ids": [ "evidence-del-valle-ebrpd-west-beach-water", "evidence-ebrpd-algae-west-beach-no-water", "evidence-ebrpd-swimming-west-no-water", "evidence-ebrpd-water-quality-west-no-water" ], "predicate": "water_availability", "spatial_scope_ids": [ "scope-del-valle-west-beach" ], "subject_id": "beach-del-valle-west", "temporal_scope": { "ends_on": "2026-09-20", "starts_on": "2026-09-20" }, "value": "no_water" }, "evidence": [ { "claim_id": "claim-del-valle-ebrpd-west-beach-water", "evidence_id": "evidence-del-valle-ebrpd-west-beach-water", "notes": "", "observation_id": "observation-del-valle-ebrpd-water-quality", "stance": "supports" }, { "claim_id": "claim-del-valle-ebrpd-west-beach-water", "evidence_id": "evidence-ebrpd-algae-west-beach-no-water", "notes": "", "observation_id": "observation-ebrpd-algae-current-del-valle", "stance": "supports" }, { "claim_id": "claim-del-valle-ebrpd-west-beach-water", "evidence_id": "evidence-ebrpd-swimming-west-no-water", "notes": "", "observation_id": "observation-ebrpd-swimming-current-beaches", "stance": "supports" }, { "claim_id": "claim-del-valle-ebrpd-west-beach-water", "evidence_id": "evidence-ebrpd-water-quality-west-no-water", "notes": "", "observation_id": "observation-ebrpd-water-quality-current-del-valle", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "At retrieval, the EBRPD page posted a blue-green algae Caution Advisory for the East Swim Beach and stated that the West Swim Beach had no water because of low lake levels.", "observation_id": "observation-del-valle-ebrpd-water-quality", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "At retrieval, the current-conditions table listed a Caution Advisory for the Del Valle East Swim Beach and no advisory for the West Swim Beach, where it reported no water because of low lake levels.", "observation_id": "observation-ebrpd-algae-current-del-valle", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-blue-green-algae" }, { "artifact_refs": [], "content": "At retrieval, East Beach had a blue-green algae Caution Advisory and West Beach had no water because of low lake levels.", "observation_id": "observation-ebrpd-swimming-current-beaches", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-swimming" }, { "artifact_refs": [], "content": "At retrieval, the table listed a Caution algae advisory at Del Valle East Beach and no advisory at West Beach, where there was no water because of low lake levels.", "observation_id": "observation-ebrpd-water-quality-current-del-valle", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-current-water-quality" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" }, { "locator": "https://www.ebparks.org/natural-resources/water-quality/blue-green-algae", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-blue-green-algae" }, { "locator": "https://www.ebparks.org/recreation/swimming/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-swimming" }, { "locator": "https://www.ebparks.org/natural-resources/water-quality", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-current-water-quality" } ] }, { "claim": { "claim_id": "claim-del-valle-lake-length", "evidence_ids": [ "evidence-del-valle-lake-length", "evidence-del-valle-ebrpd-lake-length" ], "predicate": "published_length_miles", "spatial_scope_ids": [ "scope-lake-del-valle" ], "subject_id": "lake-del-valle", "temporal_scope": null, "value": 5 }, "evidence": [ { "claim_id": "claim-del-valle-lake-length", "evidence_id": "evidence-del-valle-lake-length", "notes": "", "observation_id": "observation-del-valle-identity-location", "stance": "supports" }, { "claim_id": "claim-del-valle-lake-length", "evidence_id": "evidence-del-valle-ebrpd-lake-length", "notes": "", "observation_id": "observation-del-valle-ebrpd-identity", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page identifies Del Valle Regional Park as an East Bay Regional Park District park about ten miles south of Livermore, with a 4,316-acre park around a five-mile-long lake; it lists 7000 Del Valle Road, Livermore, California 94550 and coordinates 37.56917, -121.68722.", "observation_id": "observation-del-valle-identity-location", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-reserveamerica-del-valle-overview-110003" }, { "artifact_refs": [], "content": "The EBRPD page places Del Valle ten miles south of Livermore, describes a five-mile lake in a 4,395-acre park, gives the address 7000 Del Valle Road, and calls the park the eastern gateway to the 28-mile Ohlone Wilderness Trail.", "observation_id": "observation-del-valle-ebrpd-identity", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.reserveamerica.com/explore/del-valle/EB/110003/overview", "publisher": "ReserveAmerica / East Bay Regional Park District", "source_id": "source-reserveamerica-del-valle-overview-110003" }, { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-little-chaparral-park-page-capacity", "evidence_ids": [ "evidence-del-valle-little-chaparral-park-page-capacity" ], "predicate": "published_paddock_capacity", "spatial_scope_ids": [ "scope-del-valle-equestrian-camps" ], "subject_id": "camp-del-valle-little-chaparral", "temporal_scope": null, "value": { "horses": [ 1, 2 ], "people_max": 4 } }, "evidence": [ { "claim_id": "claim-del-valle-little-chaparral-park-page-capacity", "evidence_id": "evidence-del-valle-little-chaparral-park-page-capacity", "notes": "", "observation_id": "observation-del-valle-little-chaparral-park-page", "stance": "conflicts" } ], "observations": [ { "artifact_refs": [], "content": "The main Del Valle page says one Little Chaparral paddock includes space for one to two horses and four people, while the dedicated camping page says one horse maximum per site.", "observation_id": "observation-del-valle-little-chaparral-park-page", "observed_at": null, "observer": "Wayproof source comparison", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-ohlone-gateway", "evidence_ids": [ "evidence-del-valle-ohlone-gateway", "evidence-del-valle-ebrpd-ohlone-gateway", "evidence-ebrpd-ohlone-gateway-current" ], "predicate": "eastern_gateway", "spatial_scope_ids": [ "scope-del-valle-park" ], "subject_id": "trail-ohlone-wilderness", "temporal_scope": null, "value": "park-del-valle-regional-park" }, "evidence": [ { "claim_id": "claim-del-valle-ohlone-gateway", "evidence_id": "evidence-del-valle-ohlone-gateway", "notes": "", "observation_id": "observation-del-valle-ohlone-permit-statement", "stance": "supports" }, { "claim_id": "claim-del-valle-ohlone-gateway", "evidence_id": "evidence-del-valle-ebrpd-ohlone-gateway", "notes": "", "observation_id": "observation-del-valle-ebrpd-identity", "stance": "supports" }, { "claim_id": "claim-del-valle-ohlone-gateway", "evidence_id": "evidence-ebrpd-ohlone-gateway-current", "notes": "", "observation_id": "observation-ebrpd-ohlone-trail", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page calls Del Valle the eastern gateway to the Ohlone Wilderness Trail, describes the trail as 28 miles connecting to Sunol and Mission Peak, and states that permits are required on portions and may be purchased at the park entrance kiosk; it separately states that backpack reservations remain available.", "observation_id": "observation-del-valle-ohlone-permit-statement", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-reserveamerica-del-valle-overview-110003" }, { "artifact_refs": [], "content": "The EBRPD page places Del Valle ten miles south of Livermore, describes a five-mile lake in a 4,395-acre park, gives the address 7000 Del Valle Road, and calls the park the eastern gateway to the 28-mile Ohlone Wilderness Trail.", "observation_id": "observation-del-valle-ebrpd-identity", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The 28-mile Ohlone Wilderness Trail is open to hikers and equestrians, not bicycles or motor vehicles, and crosses Ohlone Wilderness, Mission Peak, Sunol, Del Valle, and leased watershed lands where users must stay in the trail corridor.", "observation_id": "observation-ebrpd-ohlone-trail", "observed_at": null, "observer": "Wayproof source review", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-ohlone-park-page" } ], "sources": [ { "locator": "https://www.reserveamerica.com/explore/del-valle/EB/110003/overview", "publisher": "ReserveAmerica / East Bay Regional Park District", "source_id": "source-reserveamerica-del-valle-overview-110003" }, { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" }, { "locator": "https://www.ebparks.org/parks/ohlone", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-ohlone-park-page" } ] }, { "claim": { "claim_id": "claim-del-valle-park-address", "evidence_ids": [ "evidence-del-valle-park-address", "evidence-del-valle-ebrpd-park-address" ], "predicate": "street_address", "spatial_scope_ids": [ "scope-del-valle-park" ], "subject_id": "park-del-valle-regional-park", "temporal_scope": null, "value": "7000 Del Valle Road, Livermore, CA 94550" }, "evidence": [ { "claim_id": "claim-del-valle-park-address", "evidence_id": "evidence-del-valle-park-address", "notes": "", "observation_id": "observation-del-valle-identity-location", "stance": "supports" }, { "claim_id": "claim-del-valle-park-address", "evidence_id": "evidence-del-valle-ebrpd-park-address", "notes": "", "observation_id": "observation-del-valle-ebrpd-identity", "stance": "supports" } ], "observations": [ { "artifact_refs": [], "content": "The page identifies Del Valle Regional Park as an East Bay Regional Park District park about ten miles south of Livermore, with a 4,316-acre park around a five-mile-long lake; it lists 7000 Del Valle Road, Livermore, California 94550 and coordinates 37.56917, -121.68722.", "observation_id": "observation-del-valle-identity-location", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-reserveamerica-del-valle-overview-110003" }, { "artifact_refs": [], "content": "The EBRPD page places Del Valle ten miles south of Livermore, describes a five-mile lake in a 4,395-acre park, gives the address 7000 Del Valle Road, and calls the park the eastern gateway to the 28-mile Ohlone Wilderness Trail.", "observation_id": "observation-del-valle-ebrpd-identity", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "sources": [ { "locator": "https://www.reserveamerica.com/explore/del-valle/EB/110003/overview", "publisher": "ReserveAmerica / East Bay Regional Park District", "source_id": "source-reserveamerica-del-valle-overview-110003" }, { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] } ], "entities": [ { "entity_id": "beach-del-valle-east", "kind": "swim_beach", "name": "Del Valle East Swim Beach" }, { "entity_id": "beach-del-valle-west", "kind": "swim_beach", "name": "Del Valle West Swim Beach" }, { "entity_id": "camp-del-valle-little-chaparral", "kind": "equestrian_campsite_area", "name": "Little Chaparral" }, { "entity_id": "campground-del-valle-family", "kind": "campground", "name": "Del Valle Family Campground" }, { "entity_id": "entrance-del-valle-main", "kind": "park_entrance", "name": "Del Valle Road Park Entrance" }, { "entity_id": "facility-del-valle-camp-store", "kind": "store", "name": "Del Valle Camp Store" }, { "entity_id": "facility-del-valle-east-beach-marina", "kind": "marina", "name": "Del Valle East Beach Marina" }, { "entity_id": "facility-del-valle-visitor-center", "kind": "visitor_center", "name": "Del Valle Visitor Center" }, { "entity_id": "lake-del-valle", "kind": "lake", "name": "Lake Del Valle" }, { "entity_id": "org-outback-adventures", "kind": "concessioner", "name": "Outback Adventures" }, { "entity_id": "org-rocky-mountain-recreation", "kind": "concessioner", "name": "Rocky Mountain Recreation" }, { "entity_id": "park-del-valle-regional-park", "kind": "park", "name": "Del Valle Regional Park" }, { "entity_id": "staging-del-valle-arroyo-road", "kind": "staging_area", "name": "Arroyo Road Staging Area" }, { "entity_id": "trail-ohlone-wilderness", "kind": "trail", "name": "Ohlone Wilderness Trail" } ], "history": [ { "action": "ADD", "change_set_id": "wp-20260920-del-valle-ebrpd-park-page", "evidence_refs": [], "knowledge_gap_refs": [], "path": "canonical/v0/sources/source-ebrpd-del-valle-park-page.json", "reason": "Add EBRPD park-page evidence, preserve conflicts, and refine current Del Valle knowledge.", "record_id": "source-ebrpd-del-valle-park-page", "record_type": "source", "summary": "Add EBRPD Del Valle park-page evidence, corroborate the 150-site campground inventory, preserve the acreage conflict, and capture dated operational conditions and rechecks." } ], "navigation": { "next_id": "source-ebrpd-del-valle-picnic-areas", "position": 34, "previous_id": "source-ebrpd-del-valle-map-2026-04", "total": 587 }, "observations": [ { "artifact_refs": [], "content": "The page distinguishes the fee-charging main entrance on Del Valle Road from the no-fee Arroyo Road Staging Area and lists two Del Valle Road walk-in entrances.", "observation_id": "observation-del-valle-ebrpd-access", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The page lists launch and inspection fees of $5 and $10 for motorized vessels and $3 and $5 for non-motorized vessels, a lake-wide 10 mph speed limit, and a prohibition on hydrofoils and E-Foils. It permits any-size boats at the public ramp.", "observation_id": "observation-del-valle-ebrpd-boating", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The EBRPD page states that the family campground has 150 sites, including two accessible sites and 21 sites with water, sewage, and 120-volt 50/30-amp electrical hookups; toilets and showers are centrally located. It separately states that five cabin sites take up to eight people and sleep five.", "observation_id": "observation-del-valle-ebrpd-campground", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The page directs motorboat and patio-boat rental questions to Rocky Mountain Recreation and seasonal kayak and paddleboard rental questions to Outback Adventures.", "observation_id": "observation-del-valle-ebrpd-concessioners", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "At retrieval, the park was open with limited amenities; the swim-beach food concession was closed until further notice, storm-damaged trails required caution, construction equipment or noise could be present during working hours, and the visitor center was open.", "observation_id": "observation-del-valle-ebrpd-current-amenities", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The page lists $5 vehicle parking, $5 trailered-vehicle parking, $25 bus parking, and no parking fee at Arroyo staging. On weekends and holidays from April through Labor Day it lists a $10 flat entry fee including vehicle and trailer parking and boat launch, excluding fishing permits and mussel inspection.", "observation_id": "observation-del-valle-ebrpd-fees", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "At retrieval, the page stated that a boat launched at Contra Loma would be quarantined for 30 days from inspected lakes including Del Valle; vessels must be cleaned, drained, and dried, and boat bands are honored only by the lake that issued them. It also requires campground guests with watercraft to complete inspection before campground check-in.", "observation_id": "observation-del-valle-ebrpd-golden-mussel", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The page gives a 10 PM to 5 AM park curfew and seasonal park gate hours: 7 AM-6 PM January-February, 6 AM-7 PM March, 6 AM-8 PM April, 6 AM-9 PM May through Labor Day, 6 AM-8 PM after Labor Day through September 30, 6 AM-7 PM October, and 7 AM-6 PM November-December.", "observation_id": "observation-del-valle-ebrpd-hours", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The EBRPD page places Del Valle ten miles south of Livermore, describes a five-mile lake in a 4,395-acre park, gives the address 7000 Del Valle Road, and calls the park the eastern gateway to the 28-mile Ohlone Wilderness Trail.", "observation_id": "observation-del-valle-ebrpd-identity", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The page publishes September-December operating and rental hours for the marina store and September-December hours for the camp store, including weather-dependent first-come boat rentals and closures on some days; the displayed schedule does not state an effective year.", "observation_id": "observation-del-valle-ebrpd-seasonal-stores", "observed_at": null, "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "At retrieval, the EBRPD page posted a blue-green algae Caution Advisory for the East Swim Beach and stated that the West Swim Beach had no water because of low lake levels.", "observation_id": "observation-del-valle-ebrpd-water-quality", "observed_at": "2026-09-20T00:00:00+00:00", "observer": "user-supplied page transcription", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" }, { "artifact_refs": [], "content": "The main Del Valle page says one Little Chaparral paddock includes space for one to two horses and four people, while the dedicated camping page says one horse maximum per site.", "observation_id": "observation-del-valle-little-chaparral-park-page", "observed_at": null, "observer": "Wayproof source comparison", "retrieved_at": "2026-09-20T00:00:00+00:00", "source_id": "source-ebrpd-del-valle-park-page" } ], "record": { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" }, "record_type": "source", "related_records": [], "sources": [ { "locator": "https://www.ebparks.org/parks/del-valle", "publisher": "East Bay Regional Park District", "source_id": "source-ebrpd-del-valle-park-page" } ] }